mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 19:13:15 +07:00
cd57b48a4a
Fix to return error code -ENOMEM from the malloc error handling case instead of 0, as done elsewhere in this function. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170209151907.28800-1-weiyj.lk@gmail.com
2319 lines
57 KiB
C
2319 lines
57 KiB
C
/*
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* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/interrupt.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/of_irq.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/of_graph.h>
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#include <linux/regulator/consumer.h>
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#include <linux/spinlock.h>
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#include <linux/mfd/syscon.h>
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#include <linux/regmap.h>
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#include <video/mipi_display.h>
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#include "dsi.h"
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#include "dsi.xml.h"
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#include "sfpb.xml.h"
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#include "dsi_cfg.h"
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static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
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{
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u32 ver;
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if (!major || !minor)
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return -EINVAL;
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/*
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* From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
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* makes all other registers 4-byte shifted down.
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*
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* In order to identify between DSI6G(v3) and beyond, and DSIv2 and
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* older, we read the DSI_VERSION register without any shift(offset
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* 0x1f0). In the case of DSIv2, this hast to be a non-zero value. In
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* the case of DSI6G, this has to be zero (the offset points to a
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* scratch register which we never touch)
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*/
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ver = msm_readl(base + REG_DSI_VERSION);
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if (ver) {
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/* older dsi host, there is no register shift */
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ver = FIELD(ver, DSI_VERSION_MAJOR);
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if (ver <= MSM_DSI_VER_MAJOR_V2) {
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/* old versions */
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*major = ver;
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*minor = 0;
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return 0;
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} else {
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return -EINVAL;
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}
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} else {
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/*
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* newer host, offset 0 has 6G_HW_VERSION, the rest of the
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* registers are shifted down, read DSI_VERSION again with
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* the shifted offset
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*/
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ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
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ver = FIELD(ver, DSI_VERSION_MAJOR);
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if (ver == MSM_DSI_VER_MAJOR_6G) {
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/* 6G version */
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*major = ver;
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*minor = msm_readl(base + REG_DSI_6G_HW_VERSION);
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return 0;
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} else {
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return -EINVAL;
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}
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}
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}
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#define DSI_ERR_STATE_ACK 0x0000
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#define DSI_ERR_STATE_TIMEOUT 0x0001
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#define DSI_ERR_STATE_DLN0_PHY 0x0002
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#define DSI_ERR_STATE_FIFO 0x0004
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#define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008
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#define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
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#define DSI_ERR_STATE_PLL_UNLOCKED 0x0020
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#define DSI_CLK_CTRL_ENABLE_CLKS \
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(DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
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DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
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DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
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DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
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struct msm_dsi_host {
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struct mipi_dsi_host base;
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struct platform_device *pdev;
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struct drm_device *dev;
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int id;
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void __iomem *ctrl_base;
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struct regulator_bulk_data supplies[DSI_DEV_REGULATOR_MAX];
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struct clk *bus_clks[DSI_BUS_CLK_MAX];
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struct clk *byte_clk;
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struct clk *esc_clk;
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struct clk *pixel_clk;
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struct clk *byte_clk_src;
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struct clk *pixel_clk_src;
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u32 byte_clk_rate;
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u32 esc_clk_rate;
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/* DSI v2 specific clocks */
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struct clk *src_clk;
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struct clk *esc_clk_src;
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struct clk *dsi_clk_src;
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u32 src_clk_rate;
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struct gpio_desc *disp_en_gpio;
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struct gpio_desc *te_gpio;
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const struct msm_dsi_cfg_handler *cfg_hnd;
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struct completion dma_comp;
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struct completion video_comp;
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struct mutex dev_mutex;
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struct mutex cmd_mutex;
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struct mutex clk_mutex;
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spinlock_t intr_lock; /* Protect interrupt ctrl register */
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u32 err_work_state;
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struct work_struct err_work;
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struct work_struct hpd_work;
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struct workqueue_struct *workqueue;
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/* DSI 6G TX buffer*/
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struct drm_gem_object *tx_gem_obj;
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/* DSI v2 TX buffer */
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void *tx_buf;
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dma_addr_t tx_buf_paddr;
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int tx_size;
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u8 *rx_buf;
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struct regmap *sfpb;
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struct drm_display_mode *mode;
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/* connected device info */
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struct device_node *device_node;
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unsigned int channel;
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unsigned int lanes;
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enum mipi_dsi_pixel_format format;
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unsigned long mode_flags;
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/* lane data parsed via DT */
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int dlane_swap;
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int num_data_lanes;
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u32 dma_cmd_ctrl_restore;
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bool registered;
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bool power_on;
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int irq;
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};
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static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
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{
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switch (fmt) {
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case MIPI_DSI_FMT_RGB565: return 16;
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case MIPI_DSI_FMT_RGB666_PACKED: return 18;
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case MIPI_DSI_FMT_RGB666:
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case MIPI_DSI_FMT_RGB888:
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default: return 24;
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}
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}
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static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
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{
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return msm_readl(msm_host->ctrl_base + reg);
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}
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static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
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{
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msm_writel(data, msm_host->ctrl_base + reg);
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}
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static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host);
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static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host);
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static const struct msm_dsi_cfg_handler *dsi_get_config(
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struct msm_dsi_host *msm_host)
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{
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const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
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struct device *dev = &msm_host->pdev->dev;
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struct regulator *gdsc_reg;
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struct clk *ahb_clk;
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int ret;
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u32 major = 0, minor = 0;
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gdsc_reg = regulator_get(dev, "gdsc");
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if (IS_ERR(gdsc_reg)) {
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pr_err("%s: cannot get gdsc\n", __func__);
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goto exit;
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}
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ahb_clk = clk_get(dev, "iface_clk");
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if (IS_ERR(ahb_clk)) {
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pr_err("%s: cannot get interface clock\n", __func__);
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goto put_gdsc;
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}
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ret = regulator_enable(gdsc_reg);
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if (ret) {
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pr_err("%s: unable to enable gdsc\n", __func__);
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goto put_clk;
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}
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ret = clk_prepare_enable(ahb_clk);
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if (ret) {
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pr_err("%s: unable to enable ahb_clk\n", __func__);
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goto disable_gdsc;
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}
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ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
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if (ret) {
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pr_err("%s: Invalid version\n", __func__);
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goto disable_clks;
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}
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cfg_hnd = msm_dsi_cfg_get(major, minor);
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DBG("%s: Version %x:%x\n", __func__, major, minor);
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disable_clks:
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clk_disable_unprepare(ahb_clk);
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disable_gdsc:
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regulator_disable(gdsc_reg);
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put_clk:
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clk_put(ahb_clk);
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put_gdsc:
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regulator_put(gdsc_reg);
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exit:
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return cfg_hnd;
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}
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static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
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{
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return container_of(host, struct msm_dsi_host, base);
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}
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static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host)
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{
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struct regulator_bulk_data *s = msm_host->supplies;
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const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
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int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
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int i;
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DBG("");
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for (i = num - 1; i >= 0; i--)
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if (regs[i].disable_load >= 0)
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regulator_set_load(s[i].consumer,
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regs[i].disable_load);
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regulator_bulk_disable(num, s);
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}
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static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host)
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{
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struct regulator_bulk_data *s = msm_host->supplies;
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const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
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int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
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int ret, i;
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DBG("");
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for (i = 0; i < num; i++) {
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if (regs[i].enable_load >= 0) {
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ret = regulator_set_load(s[i].consumer,
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regs[i].enable_load);
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if (ret < 0) {
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pr_err("regulator %d set op mode failed, %d\n",
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i, ret);
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goto fail;
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}
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}
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}
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ret = regulator_bulk_enable(num, s);
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if (ret < 0) {
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pr_err("regulator enable failed, %d\n", ret);
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goto fail;
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}
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return 0;
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fail:
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for (i--; i >= 0; i--)
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regulator_set_load(s[i].consumer, regs[i].disable_load);
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return ret;
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}
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static int dsi_regulator_init(struct msm_dsi_host *msm_host)
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{
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struct regulator_bulk_data *s = msm_host->supplies;
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const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
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int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
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int i, ret;
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for (i = 0; i < num; i++)
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s[i].supply = regs[i].name;
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ret = devm_regulator_bulk_get(&msm_host->pdev->dev, num, s);
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if (ret < 0) {
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pr_err("%s: failed to init regulator, ret=%d\n",
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__func__, ret);
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return ret;
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}
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return 0;
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}
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static int dsi_clk_init(struct msm_dsi_host *msm_host)
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{
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struct device *dev = &msm_host->pdev->dev;
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const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
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const struct msm_dsi_config *cfg = cfg_hnd->cfg;
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int i, ret = 0;
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/* get bus clocks */
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for (i = 0; i < cfg->num_bus_clks; i++) {
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msm_host->bus_clks[i] = devm_clk_get(dev,
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cfg->bus_clk_names[i]);
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if (IS_ERR(msm_host->bus_clks[i])) {
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ret = PTR_ERR(msm_host->bus_clks[i]);
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pr_err("%s: Unable to get %s, ret = %d\n",
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__func__, cfg->bus_clk_names[i], ret);
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goto exit;
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}
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}
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/* get link and source clocks */
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msm_host->byte_clk = devm_clk_get(dev, "byte_clk");
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if (IS_ERR(msm_host->byte_clk)) {
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ret = PTR_ERR(msm_host->byte_clk);
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pr_err("%s: can't find dsi_byte_clk. ret=%d\n",
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__func__, ret);
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msm_host->byte_clk = NULL;
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goto exit;
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}
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msm_host->pixel_clk = devm_clk_get(dev, "pixel_clk");
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if (IS_ERR(msm_host->pixel_clk)) {
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ret = PTR_ERR(msm_host->pixel_clk);
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pr_err("%s: can't find dsi_pixel_clk. ret=%d\n",
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__func__, ret);
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msm_host->pixel_clk = NULL;
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goto exit;
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}
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msm_host->esc_clk = devm_clk_get(dev, "core_clk");
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if (IS_ERR(msm_host->esc_clk)) {
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ret = PTR_ERR(msm_host->esc_clk);
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pr_err("%s: can't find dsi_esc_clk. ret=%d\n",
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__func__, ret);
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msm_host->esc_clk = NULL;
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goto exit;
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}
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msm_host->byte_clk_src = clk_get_parent(msm_host->byte_clk);
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if (!msm_host->byte_clk_src) {
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ret = -ENODEV;
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pr_err("%s: can't find byte_clk_src. ret=%d\n", __func__, ret);
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goto exit;
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}
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msm_host->pixel_clk_src = clk_get_parent(msm_host->pixel_clk);
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if (!msm_host->pixel_clk_src) {
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ret = -ENODEV;
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pr_err("%s: can't find pixel_clk_src. ret=%d\n", __func__, ret);
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goto exit;
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}
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if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
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msm_host->src_clk = devm_clk_get(dev, "src_clk");
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if (IS_ERR(msm_host->src_clk)) {
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ret = PTR_ERR(msm_host->src_clk);
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pr_err("%s: can't find dsi_src_clk. ret=%d\n",
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__func__, ret);
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msm_host->src_clk = NULL;
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goto exit;
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}
|
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msm_host->esc_clk_src = clk_get_parent(msm_host->esc_clk);
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if (!msm_host->esc_clk_src) {
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ret = -ENODEV;
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pr_err("%s: can't get esc_clk_src. ret=%d\n",
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__func__, ret);
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goto exit;
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}
|
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|
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msm_host->dsi_clk_src = clk_get_parent(msm_host->src_clk);
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if (!msm_host->dsi_clk_src) {
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ret = -ENODEV;
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pr_err("%s: can't get dsi_clk_src. ret=%d\n",
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__func__, ret);
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}
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}
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exit:
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return ret;
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}
|
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|
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static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host)
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{
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const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
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int i, ret;
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DBG("id=%d", msm_host->id);
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|
|
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for (i = 0; i < cfg->num_bus_clks; i++) {
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ret = clk_prepare_enable(msm_host->bus_clks[i]);
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if (ret) {
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pr_err("%s: failed to enable bus clock %d ret %d\n",
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__func__, i, ret);
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goto err;
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}
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}
|
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|
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return 0;
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err:
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for (; i > 0; i--)
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clk_disable_unprepare(msm_host->bus_clks[i]);
|
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|
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return ret;
|
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}
|
|
|
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static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host)
|
|
{
|
|
const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
|
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int i;
|
|
|
|
DBG("");
|
|
|
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for (i = cfg->num_bus_clks - 1; i >= 0; i--)
|
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clk_disable_unprepare(msm_host->bus_clks[i]);
|
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}
|
|
|
|
static int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
|
|
{
|
|
int ret;
|
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|
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DBG("Set clk rates: pclk=%d, byteclk=%d",
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msm_host->mode->clock, msm_host->byte_clk_rate);
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|
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ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
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if (ret) {
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pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
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goto error;
|
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}
|
|
|
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ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
|
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if (ret) {
|
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pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
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goto error;
|
|
}
|
|
|
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ret = clk_prepare_enable(msm_host->esc_clk);
|
|
if (ret) {
|
|
pr_err("%s: Failed to enable dsi esc clk\n", __func__);
|
|
goto error;
|
|
}
|
|
|
|
ret = clk_prepare_enable(msm_host->byte_clk);
|
|
if (ret) {
|
|
pr_err("%s: Failed to enable dsi byte clk\n", __func__);
|
|
goto byte_clk_err;
|
|
}
|
|
|
|
ret = clk_prepare_enable(msm_host->pixel_clk);
|
|
if (ret) {
|
|
pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
|
|
goto pixel_clk_err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
pixel_clk_err:
|
|
clk_disable_unprepare(msm_host->byte_clk);
|
|
byte_clk_err:
|
|
clk_disable_unprepare(msm_host->esc_clk);
|
|
error:
|
|
return ret;
|
|
}
|
|
|
|
static int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
|
|
{
|
|
int ret;
|
|
|
|
DBG("Set clk rates: pclk=%d, byteclk=%d, esc_clk=%d, dsi_src_clk=%d",
|
|
msm_host->mode->clock, msm_host->byte_clk_rate,
|
|
msm_host->esc_clk_rate, msm_host->src_clk_rate);
|
|
|
|
ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
|
|
if (ret) {
|
|
pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
|
|
goto error;
|
|
}
|
|
|
|
ret = clk_set_rate(msm_host->esc_clk, msm_host->esc_clk_rate);
|
|
if (ret) {
|
|
pr_err("%s: Failed to set rate esc clk, %d\n", __func__, ret);
|
|
goto error;
|
|
}
|
|
|
|
ret = clk_set_rate(msm_host->src_clk, msm_host->src_clk_rate);
|
|
if (ret) {
|
|
pr_err("%s: Failed to set rate src clk, %d\n", __func__, ret);
|
|
goto error;
|
|
}
|
|
|
|
ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
|
|
if (ret) {
|
|
pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
|
|
goto error;
|
|
}
|
|
|
|
ret = clk_prepare_enable(msm_host->byte_clk);
|
|
if (ret) {
|
|
pr_err("%s: Failed to enable dsi byte clk\n", __func__);
|
|
goto error;
|
|
}
|
|
|
|
ret = clk_prepare_enable(msm_host->esc_clk);
|
|
if (ret) {
|
|
pr_err("%s: Failed to enable dsi esc clk\n", __func__);
|
|
goto esc_clk_err;
|
|
}
|
|
|
|
ret = clk_prepare_enable(msm_host->src_clk);
|
|
if (ret) {
|
|
pr_err("%s: Failed to enable dsi src clk\n", __func__);
|
|
goto src_clk_err;
|
|
}
|
|
|
|
ret = clk_prepare_enable(msm_host->pixel_clk);
|
|
if (ret) {
|
|
pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
|
|
goto pixel_clk_err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
pixel_clk_err:
|
|
clk_disable_unprepare(msm_host->src_clk);
|
|
src_clk_err:
|
|
clk_disable_unprepare(msm_host->esc_clk);
|
|
esc_clk_err:
|
|
clk_disable_unprepare(msm_host->byte_clk);
|
|
error:
|
|
return ret;
|
|
}
|
|
|
|
static int dsi_link_clk_enable(struct msm_dsi_host *msm_host)
|
|
{
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
|
|
if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G)
|
|
return dsi_link_clk_enable_6g(msm_host);
|
|
else
|
|
return dsi_link_clk_enable_v2(msm_host);
|
|
}
|
|
|
|
static void dsi_link_clk_disable(struct msm_dsi_host *msm_host)
|
|
{
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
|
|
if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
|
|
clk_disable_unprepare(msm_host->esc_clk);
|
|
clk_disable_unprepare(msm_host->pixel_clk);
|
|
clk_disable_unprepare(msm_host->byte_clk);
|
|
} else {
|
|
clk_disable_unprepare(msm_host->pixel_clk);
|
|
clk_disable_unprepare(msm_host->src_clk);
|
|
clk_disable_unprepare(msm_host->esc_clk);
|
|
clk_disable_unprepare(msm_host->byte_clk);
|
|
}
|
|
}
|
|
|
|
static int dsi_clk_ctrl(struct msm_dsi_host *msm_host, bool enable)
|
|
{
|
|
int ret = 0;
|
|
|
|
mutex_lock(&msm_host->clk_mutex);
|
|
if (enable) {
|
|
ret = dsi_bus_clk_enable(msm_host);
|
|
if (ret) {
|
|
pr_err("%s: Can not enable bus clk, %d\n",
|
|
__func__, ret);
|
|
goto unlock_ret;
|
|
}
|
|
ret = dsi_link_clk_enable(msm_host);
|
|
if (ret) {
|
|
pr_err("%s: Can not enable link clk, %d\n",
|
|
__func__, ret);
|
|
dsi_bus_clk_disable(msm_host);
|
|
goto unlock_ret;
|
|
}
|
|
} else {
|
|
dsi_link_clk_disable(msm_host);
|
|
dsi_bus_clk_disable(msm_host);
|
|
}
|
|
|
|
unlock_ret:
|
|
mutex_unlock(&msm_host->clk_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
|
|
{
|
|
struct drm_display_mode *mode = msm_host->mode;
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
u8 lanes = msm_host->lanes;
|
|
u32 bpp = dsi_get_bpp(msm_host->format);
|
|
u32 pclk_rate;
|
|
|
|
if (!mode) {
|
|
pr_err("%s: mode not set\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pclk_rate = mode->clock * 1000;
|
|
if (lanes > 0) {
|
|
msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes);
|
|
} else {
|
|
pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
|
|
msm_host->byte_clk_rate = (pclk_rate * bpp) / 8;
|
|
}
|
|
|
|
DBG("pclk=%d, bclk=%d", pclk_rate, msm_host->byte_clk_rate);
|
|
|
|
msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
|
|
|
|
if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
|
|
unsigned int esc_mhz, esc_div;
|
|
unsigned long byte_mhz;
|
|
|
|
msm_host->src_clk_rate = (pclk_rate * bpp) / 8;
|
|
|
|
/*
|
|
* esc clock is byte clock followed by a 4 bit divider,
|
|
* we need to find an escape clock frequency within the
|
|
* mipi DSI spec range within the maximum divider limit
|
|
* We iterate here between an escape clock frequencey
|
|
* between 20 Mhz to 5 Mhz and pick up the first one
|
|
* that can be supported by our divider
|
|
*/
|
|
|
|
byte_mhz = msm_host->byte_clk_rate / 1000000;
|
|
|
|
for (esc_mhz = 20; esc_mhz >= 5; esc_mhz--) {
|
|
esc_div = DIV_ROUND_UP(byte_mhz, esc_mhz);
|
|
|
|
/*
|
|
* TODO: Ideally, we shouldn't know what sort of divider
|
|
* is available in mmss_cc, we're just assuming that
|
|
* it'll always be a 4 bit divider. Need to come up with
|
|
* a better way here.
|
|
*/
|
|
if (esc_div >= 1 && esc_div <= 16)
|
|
break;
|
|
}
|
|
|
|
if (esc_mhz < 5)
|
|
return -EINVAL;
|
|
|
|
msm_host->esc_clk_rate = msm_host->byte_clk_rate / esc_div;
|
|
|
|
DBG("esc=%d, src=%d", msm_host->esc_clk_rate,
|
|
msm_host->src_clk_rate);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dsi_phy_sw_reset(struct msm_dsi_host *msm_host)
|
|
{
|
|
DBG("");
|
|
dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
|
|
/* Make sure fully reset */
|
|
wmb();
|
|
udelay(1000);
|
|
dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
|
|
udelay(100);
|
|
}
|
|
|
|
static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
|
|
{
|
|
u32 intr;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&msm_host->intr_lock, flags);
|
|
intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
|
|
|
|
if (enable)
|
|
intr |= mask;
|
|
else
|
|
intr &= ~mask;
|
|
|
|
DBG("intr=%x enable=%d", intr, enable);
|
|
|
|
dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
|
|
spin_unlock_irqrestore(&msm_host->intr_lock, flags);
|
|
}
|
|
|
|
static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
|
|
{
|
|
if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
|
|
return BURST_MODE;
|
|
else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
|
|
return NON_BURST_SYNCH_PULSE;
|
|
|
|
return NON_BURST_SYNCH_EVENT;
|
|
}
|
|
|
|
static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
|
|
const enum mipi_dsi_pixel_format mipi_fmt)
|
|
{
|
|
switch (mipi_fmt) {
|
|
case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
|
|
case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
|
|
case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
|
|
case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
|
|
default: return VID_DST_FORMAT_RGB888;
|
|
}
|
|
}
|
|
|
|
static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
|
|
const enum mipi_dsi_pixel_format mipi_fmt)
|
|
{
|
|
switch (mipi_fmt) {
|
|
case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
|
|
case MIPI_DSI_FMT_RGB666_PACKED:
|
|
case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666;
|
|
case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
|
|
default: return CMD_DST_FORMAT_RGB888;
|
|
}
|
|
}
|
|
|
|
static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
|
|
u32 clk_pre, u32 clk_post)
|
|
{
|
|
u32 flags = msm_host->mode_flags;
|
|
enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
u32 data = 0;
|
|
|
|
if (!enable) {
|
|
dsi_write(msm_host, REG_DSI_CTRL, 0);
|
|
return;
|
|
}
|
|
|
|
if (flags & MIPI_DSI_MODE_VIDEO) {
|
|
if (flags & MIPI_DSI_MODE_VIDEO_HSE)
|
|
data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
|
|
if (flags & MIPI_DSI_MODE_VIDEO_HFP)
|
|
data |= DSI_VID_CFG0_HFP_POWER_STOP;
|
|
if (flags & MIPI_DSI_MODE_VIDEO_HBP)
|
|
data |= DSI_VID_CFG0_HBP_POWER_STOP;
|
|
if (flags & MIPI_DSI_MODE_VIDEO_HSA)
|
|
data |= DSI_VID_CFG0_HSA_POWER_STOP;
|
|
/* Always set low power stop mode for BLLP
|
|
* to let command engine send packets
|
|
*/
|
|
data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
|
|
DSI_VID_CFG0_BLLP_POWER_STOP;
|
|
data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
|
|
data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
|
|
data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
|
|
dsi_write(msm_host, REG_DSI_VID_CFG0, data);
|
|
|
|
/* Do not swap RGB colors */
|
|
data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
|
|
dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
|
|
} else {
|
|
/* Do not swap RGB colors */
|
|
data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
|
|
data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
|
|
dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
|
|
|
|
data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
|
|
DSI_CMD_CFG1_WR_MEM_CONTINUE(
|
|
MIPI_DCS_WRITE_MEMORY_CONTINUE);
|
|
/* Always insert DCS command */
|
|
data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
|
|
dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
|
|
}
|
|
|
|
dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
|
|
DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
|
|
DSI_CMD_DMA_CTRL_LOW_POWER);
|
|
|
|
data = 0;
|
|
/* Always assume dedicated TE pin */
|
|
data |= DSI_TRIG_CTRL_TE;
|
|
data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
|
|
data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
|
|
data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
|
|
if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
|
|
(cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
|
|
data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
|
|
dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
|
|
|
|
data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(clk_post) |
|
|
DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(clk_pre);
|
|
dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
|
|
|
|
data = 0;
|
|
if (!(flags & MIPI_DSI_MODE_EOT_PACKET))
|
|
data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
|
|
dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
|
|
|
|
/* allow only ack-err-status to generate interrupt */
|
|
dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
|
|
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
|
|
|
|
dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
|
|
|
|
data = DSI_CTRL_CLK_EN;
|
|
|
|
DBG("lane number=%d", msm_host->lanes);
|
|
data |= ((DSI_CTRL_LANE0 << msm_host->lanes) - DSI_CTRL_LANE0);
|
|
|
|
dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
|
|
DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(msm_host->dlane_swap));
|
|
|
|
if (!(flags & MIPI_DSI_CLOCK_NON_CONTINUOUS))
|
|
dsi_write(msm_host, REG_DSI_LANE_CTRL,
|
|
DSI_LANE_CTRL_CLKLN_HS_FORCE_REQUEST);
|
|
|
|
data |= DSI_CTRL_ENABLE;
|
|
|
|
dsi_write(msm_host, REG_DSI_CTRL, data);
|
|
}
|
|
|
|
static void dsi_timing_setup(struct msm_dsi_host *msm_host)
|
|
{
|
|
struct drm_display_mode *mode = msm_host->mode;
|
|
u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
|
|
u32 h_total = mode->htotal;
|
|
u32 v_total = mode->vtotal;
|
|
u32 hs_end = mode->hsync_end - mode->hsync_start;
|
|
u32 vs_end = mode->vsync_end - mode->vsync_start;
|
|
u32 ha_start = h_total - mode->hsync_start;
|
|
u32 ha_end = ha_start + mode->hdisplay;
|
|
u32 va_start = v_total - mode->vsync_start;
|
|
u32 va_end = va_start + mode->vdisplay;
|
|
u32 wc;
|
|
|
|
DBG("");
|
|
|
|
if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
|
|
dsi_write(msm_host, REG_DSI_ACTIVE_H,
|
|
DSI_ACTIVE_H_START(ha_start) |
|
|
DSI_ACTIVE_H_END(ha_end));
|
|
dsi_write(msm_host, REG_DSI_ACTIVE_V,
|
|
DSI_ACTIVE_V_START(va_start) |
|
|
DSI_ACTIVE_V_END(va_end));
|
|
dsi_write(msm_host, REG_DSI_TOTAL,
|
|
DSI_TOTAL_H_TOTAL(h_total - 1) |
|
|
DSI_TOTAL_V_TOTAL(v_total - 1));
|
|
|
|
dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
|
|
DSI_ACTIVE_HSYNC_START(hs_start) |
|
|
DSI_ACTIVE_HSYNC_END(hs_end));
|
|
dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
|
|
dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
|
|
DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
|
|
DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
|
|
} else { /* command mode */
|
|
/* image data and 1 byte write_memory_start cmd */
|
|
wc = mode->hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
|
|
|
|
dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_CTRL,
|
|
DSI_CMD_MDP_STREAM_CTRL_WORD_COUNT(wc) |
|
|
DSI_CMD_MDP_STREAM_CTRL_VIRTUAL_CHANNEL(
|
|
msm_host->channel) |
|
|
DSI_CMD_MDP_STREAM_CTRL_DATA_TYPE(
|
|
MIPI_DSI_DCS_LONG_WRITE));
|
|
|
|
dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_TOTAL,
|
|
DSI_CMD_MDP_STREAM_TOTAL_H_TOTAL(mode->hdisplay) |
|
|
DSI_CMD_MDP_STREAM_TOTAL_V_TOTAL(mode->vdisplay));
|
|
}
|
|
}
|
|
|
|
static void dsi_sw_reset(struct msm_dsi_host *msm_host)
|
|
{
|
|
dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
|
|
wmb(); /* clocks need to be enabled before reset */
|
|
|
|
dsi_write(msm_host, REG_DSI_RESET, 1);
|
|
wmb(); /* make sure reset happen */
|
|
dsi_write(msm_host, REG_DSI_RESET, 0);
|
|
}
|
|
|
|
static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
|
|
bool video_mode, bool enable)
|
|
{
|
|
u32 dsi_ctrl;
|
|
|
|
dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
|
|
|
|
if (!enable) {
|
|
dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
|
|
DSI_CTRL_CMD_MODE_EN);
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
|
|
DSI_IRQ_MASK_VIDEO_DONE, 0);
|
|
} else {
|
|
if (video_mode) {
|
|
dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
|
|
} else { /* command mode */
|
|
dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
|
|
}
|
|
dsi_ctrl |= DSI_CTRL_ENABLE;
|
|
}
|
|
|
|
dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
|
|
}
|
|
|
|
static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
|
|
{
|
|
u32 data;
|
|
|
|
data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
|
|
|
|
if (mode == 0)
|
|
data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
|
|
else
|
|
data |= DSI_CMD_DMA_CTRL_LOW_POWER;
|
|
|
|
dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
|
|
}
|
|
|
|
static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
|
|
{
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
|
|
|
|
reinit_completion(&msm_host->video_comp);
|
|
|
|
wait_for_completion_timeout(&msm_host->video_comp,
|
|
msecs_to_jiffies(70));
|
|
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
|
|
}
|
|
|
|
static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
|
|
{
|
|
if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
|
|
return;
|
|
|
|
if (msm_host->power_on) {
|
|
dsi_wait4video_done(msm_host);
|
|
/* delay 4 ms to skip BLLP */
|
|
usleep_range(2000, 4000);
|
|
}
|
|
}
|
|
|
|
/* dsi_cmd */
|
|
static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
|
|
{
|
|
struct drm_device *dev = msm_host->dev;
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
int ret;
|
|
uint64_t iova;
|
|
|
|
if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
|
|
mutex_lock(&dev->struct_mutex);
|
|
msm_host->tx_gem_obj = msm_gem_new(dev, size, MSM_BO_UNCACHED);
|
|
if (IS_ERR(msm_host->tx_gem_obj)) {
|
|
ret = PTR_ERR(msm_host->tx_gem_obj);
|
|
pr_err("%s: failed to allocate gem, %d\n",
|
|
__func__, ret);
|
|
msm_host->tx_gem_obj = NULL;
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return ret;
|
|
}
|
|
|
|
ret = msm_gem_get_iova_locked(msm_host->tx_gem_obj, 0, &iova);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
if (ret) {
|
|
pr_err("%s: failed to get iova, %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
if (iova & 0x07) {
|
|
pr_err("%s: buf NOT 8 bytes aligned\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
msm_host->tx_size = msm_host->tx_gem_obj->size;
|
|
} else {
|
|
msm_host->tx_buf = dma_alloc_coherent(dev->dev, size,
|
|
&msm_host->tx_buf_paddr, GFP_KERNEL);
|
|
if (!msm_host->tx_buf) {
|
|
ret = -ENOMEM;
|
|
pr_err("%s: failed to allocate tx buf, %d\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
msm_host->tx_size = size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dsi_tx_buf_free(struct msm_dsi_host *msm_host)
|
|
{
|
|
struct drm_device *dev = msm_host->dev;
|
|
|
|
if (msm_host->tx_gem_obj) {
|
|
msm_gem_put_iova(msm_host->tx_gem_obj, 0);
|
|
mutex_lock(&dev->struct_mutex);
|
|
msm_gem_free_object(msm_host->tx_gem_obj);
|
|
msm_host->tx_gem_obj = NULL;
|
|
mutex_unlock(&dev->struct_mutex);
|
|
}
|
|
|
|
if (msm_host->tx_buf)
|
|
dma_free_coherent(dev->dev, msm_host->tx_size, msm_host->tx_buf,
|
|
msm_host->tx_buf_paddr);
|
|
}
|
|
|
|
/*
|
|
* prepare cmd buffer to be txed
|
|
*/
|
|
static int dsi_cmd_dma_add(struct msm_dsi_host *msm_host,
|
|
const struct mipi_dsi_msg *msg)
|
|
{
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
struct mipi_dsi_packet packet;
|
|
int len;
|
|
int ret;
|
|
u8 *data;
|
|
|
|
ret = mipi_dsi_create_packet(&packet, msg);
|
|
if (ret) {
|
|
pr_err("%s: create packet failed, %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
len = (packet.size + 3) & (~0x3);
|
|
|
|
if (len > msm_host->tx_size) {
|
|
pr_err("%s: packet size is too big\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
|
|
data = msm_gem_get_vaddr(msm_host->tx_gem_obj);
|
|
if (IS_ERR(data)) {
|
|
ret = PTR_ERR(data);
|
|
pr_err("%s: get vaddr failed, %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
} else {
|
|
data = msm_host->tx_buf;
|
|
}
|
|
|
|
/* MSM specific command format in memory */
|
|
data[0] = packet.header[1];
|
|
data[1] = packet.header[2];
|
|
data[2] = packet.header[0];
|
|
data[3] = BIT(7); /* Last packet */
|
|
if (mipi_dsi_packet_format_is_long(msg->type))
|
|
data[3] |= BIT(6);
|
|
if (msg->rx_buf && msg->rx_len)
|
|
data[3] |= BIT(5);
|
|
|
|
/* Long packet */
|
|
if (packet.payload && packet.payload_length)
|
|
memcpy(data + 4, packet.payload, packet.payload_length);
|
|
|
|
/* Append 0xff to the end */
|
|
if (packet.size < len)
|
|
memset(data + packet.size, 0xff, len - packet.size);
|
|
|
|
if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G)
|
|
msm_gem_put_vaddr(msm_host->tx_gem_obj);
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* dsi_short_read1_resp: 1 parameter
|
|
*/
|
|
static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
|
|
{
|
|
u8 *data = msg->rx_buf;
|
|
if (data && (msg->rx_len >= 1)) {
|
|
*data = buf[1]; /* strip out dcs type */
|
|
return 1;
|
|
} else {
|
|
pr_err("%s: read data does not match with rx_buf len %zu\n",
|
|
__func__, msg->rx_len);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* dsi_short_read2_resp: 2 parameter
|
|
*/
|
|
static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
|
|
{
|
|
u8 *data = msg->rx_buf;
|
|
if (data && (msg->rx_len >= 2)) {
|
|
data[0] = buf[1]; /* strip out dcs type */
|
|
data[1] = buf[2];
|
|
return 2;
|
|
} else {
|
|
pr_err("%s: read data does not match with rx_buf len %zu\n",
|
|
__func__, msg->rx_len);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
|
|
{
|
|
/* strip out 4 byte dcs header */
|
|
if (msg->rx_buf && msg->rx_len)
|
|
memcpy(msg->rx_buf, buf + 4, msg->rx_len);
|
|
|
|
return msg->rx_len;
|
|
}
|
|
|
|
static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
|
|
{
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
int ret;
|
|
uint64_t dma_base;
|
|
bool triggered;
|
|
|
|
if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
|
|
ret = msm_gem_get_iova(msm_host->tx_gem_obj, 0, &dma_base);
|
|
if (ret) {
|
|
pr_err("%s: failed to get iova: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
} else {
|
|
dma_base = msm_host->tx_buf_paddr;
|
|
}
|
|
|
|
reinit_completion(&msm_host->dma_comp);
|
|
|
|
dsi_wait4video_eng_busy(msm_host);
|
|
|
|
triggered = msm_dsi_manager_cmd_xfer_trigger(
|
|
msm_host->id, dma_base, len);
|
|
if (triggered) {
|
|
ret = wait_for_completion_timeout(&msm_host->dma_comp,
|
|
msecs_to_jiffies(200));
|
|
DBG("ret=%d", ret);
|
|
if (ret == 0)
|
|
ret = -ETIMEDOUT;
|
|
else
|
|
ret = len;
|
|
} else
|
|
ret = len;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
|
|
u8 *buf, int rx_byte, int pkt_size)
|
|
{
|
|
u32 *lp, *temp, data;
|
|
int i, j = 0, cnt;
|
|
u32 read_cnt;
|
|
u8 reg[16];
|
|
int repeated_bytes = 0;
|
|
int buf_offset = buf - msm_host->rx_buf;
|
|
|
|
lp = (u32 *)buf;
|
|
temp = (u32 *)reg;
|
|
cnt = (rx_byte + 3) >> 2;
|
|
if (cnt > 4)
|
|
cnt = 4; /* 4 x 32 bits registers only */
|
|
|
|
if (rx_byte == 4)
|
|
read_cnt = 4;
|
|
else
|
|
read_cnt = pkt_size + 6;
|
|
|
|
/*
|
|
* In case of multiple reads from the panel, after the first read, there
|
|
* is possibility that there are some bytes in the payload repeating in
|
|
* the RDBK_DATA registers. Since we read all the parameters from the
|
|
* panel right from the first byte for every pass. We need to skip the
|
|
* repeating bytes and then append the new parameters to the rx buffer.
|
|
*/
|
|
if (read_cnt > 16) {
|
|
int bytes_shifted;
|
|
/* Any data more than 16 bytes will be shifted out.
|
|
* The temp read buffer should already contain these bytes.
|
|
* The remaining bytes in read buffer are the repeated bytes.
|
|
*/
|
|
bytes_shifted = read_cnt - 16;
|
|
repeated_bytes = buf_offset - bytes_shifted;
|
|
}
|
|
|
|
for (i = cnt - 1; i >= 0; i--) {
|
|
data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
|
|
*temp++ = ntohl(data); /* to host byte order */
|
|
DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
|
|
}
|
|
|
|
for (i = repeated_bytes; i < 16; i++)
|
|
buf[j++] = reg[i];
|
|
|
|
return j;
|
|
}
|
|
|
|
static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
|
|
const struct mipi_dsi_msg *msg)
|
|
{
|
|
int len, ret;
|
|
int bllp_len = msm_host->mode->hdisplay *
|
|
dsi_get_bpp(msm_host->format) / 8;
|
|
|
|
len = dsi_cmd_dma_add(msm_host, msg);
|
|
if (!len) {
|
|
pr_err("%s: failed to add cmd type = 0x%x\n",
|
|
__func__, msg->type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* for video mode, do not send cmds more than
|
|
* one pixel line, since it only transmit it
|
|
* during BLLP.
|
|
*/
|
|
/* TODO: if the command is sent in LP mode, the bit rate is only
|
|
* half of esc clk rate. In this case, if the video is already
|
|
* actively streaming, we need to check more carefully if the
|
|
* command can be fit into one BLLP.
|
|
*/
|
|
if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
|
|
pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
|
|
__func__, len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = dsi_cmd_dma_tx(msm_host, len);
|
|
if (ret < len) {
|
|
pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d\n",
|
|
__func__, msg->type, (*(u8 *)(msg->tx_buf)), len);
|
|
return -ECOMM;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
static void dsi_sw_reset_restore(struct msm_dsi_host *msm_host)
|
|
{
|
|
u32 data0, data1;
|
|
|
|
data0 = dsi_read(msm_host, REG_DSI_CTRL);
|
|
data1 = data0;
|
|
data1 &= ~DSI_CTRL_ENABLE;
|
|
dsi_write(msm_host, REG_DSI_CTRL, data1);
|
|
/*
|
|
* dsi controller need to be disabled before
|
|
* clocks turned on
|
|
*/
|
|
wmb();
|
|
|
|
dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
|
|
wmb(); /* make sure clocks enabled */
|
|
|
|
/* dsi controller can only be reset while clocks are running */
|
|
dsi_write(msm_host, REG_DSI_RESET, 1);
|
|
wmb(); /* make sure reset happen */
|
|
dsi_write(msm_host, REG_DSI_RESET, 0);
|
|
wmb(); /* controller out of reset */
|
|
dsi_write(msm_host, REG_DSI_CTRL, data0);
|
|
wmb(); /* make sure dsi controller enabled again */
|
|
}
|
|
|
|
static void dsi_hpd_worker(struct work_struct *work)
|
|
{
|
|
struct msm_dsi_host *msm_host =
|
|
container_of(work, struct msm_dsi_host, hpd_work);
|
|
|
|
drm_helper_hpd_irq_event(msm_host->dev);
|
|
}
|
|
|
|
static void dsi_err_worker(struct work_struct *work)
|
|
{
|
|
struct msm_dsi_host *msm_host =
|
|
container_of(work, struct msm_dsi_host, err_work);
|
|
u32 status = msm_host->err_work_state;
|
|
|
|
pr_err_ratelimited("%s: status=%x\n", __func__, status);
|
|
if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
|
|
dsi_sw_reset_restore(msm_host);
|
|
|
|
/* It is safe to clear here because error irq is disabled. */
|
|
msm_host->err_work_state = 0;
|
|
|
|
/* enable dsi error interrupt */
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
|
|
}
|
|
|
|
static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
|
|
{
|
|
u32 status;
|
|
|
|
status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
|
|
|
|
if (status) {
|
|
dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
|
|
/* Writing of an extra 0 needed to clear error bits */
|
|
dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
|
|
msm_host->err_work_state |= DSI_ERR_STATE_ACK;
|
|
}
|
|
}
|
|
|
|
static void dsi_timeout_status(struct msm_dsi_host *msm_host)
|
|
{
|
|
u32 status;
|
|
|
|
status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
|
|
|
|
if (status) {
|
|
dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
|
|
msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
|
|
{
|
|
u32 status;
|
|
|
|
status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
|
|
|
|
if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
|
|
DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
|
|
DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
|
|
DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
|
|
DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
|
|
dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
|
|
msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
|
|
}
|
|
}
|
|
|
|
static void dsi_fifo_status(struct msm_dsi_host *msm_host)
|
|
{
|
|
u32 status;
|
|
|
|
status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
|
|
|
|
/* fifo underflow, overflow */
|
|
if (status) {
|
|
dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
|
|
msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
|
|
if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
|
|
msm_host->err_work_state |=
|
|
DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
|
|
}
|
|
}
|
|
|
|
static void dsi_status(struct msm_dsi_host *msm_host)
|
|
{
|
|
u32 status;
|
|
|
|
status = dsi_read(msm_host, REG_DSI_STATUS0);
|
|
|
|
if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
|
|
dsi_write(msm_host, REG_DSI_STATUS0, status);
|
|
msm_host->err_work_state |=
|
|
DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
|
|
}
|
|
}
|
|
|
|
static void dsi_clk_status(struct msm_dsi_host *msm_host)
|
|
{
|
|
u32 status;
|
|
|
|
status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
|
|
|
|
if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
|
|
dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
|
|
msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
|
|
}
|
|
}
|
|
|
|
static void dsi_error(struct msm_dsi_host *msm_host)
|
|
{
|
|
/* disable dsi error interrupt */
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
|
|
|
|
dsi_clk_status(msm_host);
|
|
dsi_fifo_status(msm_host);
|
|
dsi_ack_err_status(msm_host);
|
|
dsi_timeout_status(msm_host);
|
|
dsi_status(msm_host);
|
|
dsi_dln0_phy_err(msm_host);
|
|
|
|
queue_work(msm_host->workqueue, &msm_host->err_work);
|
|
}
|
|
|
|
static irqreturn_t dsi_host_irq(int irq, void *ptr)
|
|
{
|
|
struct msm_dsi_host *msm_host = ptr;
|
|
u32 isr;
|
|
unsigned long flags;
|
|
|
|
if (!msm_host->ctrl_base)
|
|
return IRQ_HANDLED;
|
|
|
|
spin_lock_irqsave(&msm_host->intr_lock, flags);
|
|
isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
|
|
dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
|
|
spin_unlock_irqrestore(&msm_host->intr_lock, flags);
|
|
|
|
DBG("isr=0x%x, id=%d", isr, msm_host->id);
|
|
|
|
if (isr & DSI_IRQ_ERROR)
|
|
dsi_error(msm_host);
|
|
|
|
if (isr & DSI_IRQ_VIDEO_DONE)
|
|
complete(&msm_host->video_comp);
|
|
|
|
if (isr & DSI_IRQ_CMD_DMA_DONE)
|
|
complete(&msm_host->dma_comp);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
|
|
struct device *panel_device)
|
|
{
|
|
msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
|
|
"disp-enable",
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(msm_host->disp_en_gpio)) {
|
|
DBG("cannot get disp-enable-gpios %ld",
|
|
PTR_ERR(msm_host->disp_en_gpio));
|
|
return PTR_ERR(msm_host->disp_en_gpio);
|
|
}
|
|
|
|
msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
|
|
GPIOD_IN);
|
|
if (IS_ERR(msm_host->te_gpio)) {
|
|
DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
|
|
return PTR_ERR(msm_host->te_gpio);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsi_host_attach(struct mipi_dsi_host *host,
|
|
struct mipi_dsi_device *dsi)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
int ret;
|
|
|
|
if (dsi->lanes > msm_host->num_data_lanes)
|
|
return -EINVAL;
|
|
|
|
msm_host->channel = dsi->channel;
|
|
msm_host->lanes = dsi->lanes;
|
|
msm_host->format = dsi->format;
|
|
msm_host->mode_flags = dsi->mode_flags;
|
|
|
|
/* Some gpios defined in panel DT need to be controlled by host */
|
|
ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
DBG("id=%d", msm_host->id);
|
|
if (msm_host->dev)
|
|
queue_work(msm_host->workqueue, &msm_host->hpd_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsi_host_detach(struct mipi_dsi_host *host,
|
|
struct mipi_dsi_device *dsi)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
msm_host->device_node = NULL;
|
|
|
|
DBG("id=%d", msm_host->id);
|
|
if (msm_host->dev)
|
|
queue_work(msm_host->workqueue, &msm_host->hpd_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
|
|
const struct mipi_dsi_msg *msg)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
int ret;
|
|
|
|
if (!msg || !msm_host->power_on)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&msm_host->cmd_mutex);
|
|
ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
|
|
mutex_unlock(&msm_host->cmd_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct mipi_dsi_host_ops dsi_host_ops = {
|
|
.attach = dsi_host_attach,
|
|
.detach = dsi_host_detach,
|
|
.transfer = dsi_host_transfer,
|
|
};
|
|
|
|
/*
|
|
* List of supported physical to logical lane mappings.
|
|
* For example, the 2nd entry represents the following mapping:
|
|
*
|
|
* "3012": Logic 3->Phys 0; Logic 0->Phys 1; Logic 1->Phys 2; Logic 2->Phys 3;
|
|
*/
|
|
static const int supported_data_lane_swaps[][4] = {
|
|
{ 0, 1, 2, 3 },
|
|
{ 3, 0, 1, 2 },
|
|
{ 2, 3, 0, 1 },
|
|
{ 1, 2, 3, 0 },
|
|
{ 0, 3, 2, 1 },
|
|
{ 1, 0, 3, 2 },
|
|
{ 2, 1, 0, 3 },
|
|
{ 3, 2, 1, 0 },
|
|
};
|
|
|
|
static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
|
|
struct device_node *ep)
|
|
{
|
|
struct device *dev = &msm_host->pdev->dev;
|
|
struct property *prop;
|
|
u32 lane_map[4];
|
|
int ret, i, len, num_lanes;
|
|
|
|
prop = of_find_property(ep, "data-lanes", &len);
|
|
if (!prop) {
|
|
dev_dbg(dev, "failed to find data lane mapping\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
num_lanes = len / sizeof(u32);
|
|
|
|
if (num_lanes < 1 || num_lanes > 4) {
|
|
dev_err(dev, "bad number of data lanes\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
msm_host->num_data_lanes = num_lanes;
|
|
|
|
ret = of_property_read_u32_array(ep, "data-lanes", lane_map,
|
|
num_lanes);
|
|
if (ret) {
|
|
dev_err(dev, "failed to read lane data\n");
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* compare DT specified physical-logical lane mappings with the ones
|
|
* supported by hardware
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(supported_data_lane_swaps); i++) {
|
|
const int *swap = supported_data_lane_swaps[i];
|
|
int j;
|
|
|
|
/*
|
|
* the data-lanes array we get from DT has a logical->physical
|
|
* mapping. The "data lane swap" register field represents
|
|
* supported configurations in a physical->logical mapping.
|
|
* Translate the DT mapping to what we understand and find a
|
|
* configuration that works.
|
|
*/
|
|
for (j = 0; j < num_lanes; j++) {
|
|
if (lane_map[j] < 0 || lane_map[j] > 3)
|
|
dev_err(dev, "bad physical lane entry %u\n",
|
|
lane_map[j]);
|
|
|
|
if (swap[lane_map[j]] != j)
|
|
break;
|
|
}
|
|
|
|
if (j == num_lanes) {
|
|
msm_host->dlane_swap = i;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
|
|
{
|
|
struct device *dev = &msm_host->pdev->dev;
|
|
struct device_node *np = dev->of_node;
|
|
struct device_node *endpoint, *device_node;
|
|
int ret;
|
|
|
|
/*
|
|
* Get the endpoint of the output port of the DSI host. In our case,
|
|
* this is mapped to port number with reg = 1. Don't return an error if
|
|
* the remote endpoint isn't defined. It's possible that there is
|
|
* nothing connected to the dsi output.
|
|
*/
|
|
endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
|
|
if (!endpoint) {
|
|
dev_dbg(dev, "%s: no endpoint\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
ret = dsi_host_parse_lane_data(msm_host, endpoint);
|
|
if (ret) {
|
|
dev_err(dev, "%s: invalid lane configuration %d\n",
|
|
__func__, ret);
|
|
goto err;
|
|
}
|
|
|
|
/* Get panel node from the output port's endpoint data */
|
|
device_node = of_graph_get_remote_port_parent(endpoint);
|
|
if (!device_node) {
|
|
dev_err(dev, "%s: no valid device\n", __func__);
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
msm_host->device_node = device_node;
|
|
|
|
if (of_property_read_bool(np, "syscon-sfpb")) {
|
|
msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
|
|
"syscon-sfpb");
|
|
if (IS_ERR(msm_host->sfpb)) {
|
|
dev_err(dev, "%s: failed to get sfpb regmap\n",
|
|
__func__);
|
|
ret = PTR_ERR(msm_host->sfpb);
|
|
}
|
|
}
|
|
|
|
of_node_put(device_node);
|
|
|
|
err:
|
|
of_node_put(endpoint);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dsi_host_get_id(struct msm_dsi_host *msm_host)
|
|
{
|
|
struct platform_device *pdev = msm_host->pdev;
|
|
const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
|
|
struct resource *res;
|
|
int i;
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_ctrl");
|
|
if (!res)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < cfg->num_dsi; i++) {
|
|
if (cfg->io_start[i] == res->start)
|
|
return i;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
int msm_dsi_host_init(struct msm_dsi *msm_dsi)
|
|
{
|
|
struct msm_dsi_host *msm_host = NULL;
|
|
struct platform_device *pdev = msm_dsi->pdev;
|
|
int ret;
|
|
|
|
msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
|
|
if (!msm_host) {
|
|
pr_err("%s: FAILED: cannot alloc dsi host\n",
|
|
__func__);
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
msm_host->pdev = pdev;
|
|
|
|
ret = dsi_host_parse_dt(msm_host);
|
|
if (ret) {
|
|
pr_err("%s: failed to parse dt\n", __func__);
|
|
goto fail;
|
|
}
|
|
|
|
msm_host->ctrl_base = msm_ioremap(pdev, "dsi_ctrl", "DSI CTRL");
|
|
if (IS_ERR(msm_host->ctrl_base)) {
|
|
pr_err("%s: unable to map Dsi ctrl base\n", __func__);
|
|
ret = PTR_ERR(msm_host->ctrl_base);
|
|
goto fail;
|
|
}
|
|
|
|
msm_host->cfg_hnd = dsi_get_config(msm_host);
|
|
if (!msm_host->cfg_hnd) {
|
|
ret = -EINVAL;
|
|
pr_err("%s: get config failed\n", __func__);
|
|
goto fail;
|
|
}
|
|
|
|
msm_host->id = dsi_host_get_id(msm_host);
|
|
if (msm_host->id < 0) {
|
|
ret = msm_host->id;
|
|
pr_err("%s: unable to identify DSI host index\n", __func__);
|
|
goto fail;
|
|
}
|
|
|
|
/* fixup base address by io offset */
|
|
msm_host->ctrl_base += msm_host->cfg_hnd->cfg->io_offset;
|
|
|
|
ret = dsi_regulator_init(msm_host);
|
|
if (ret) {
|
|
pr_err("%s: regulator init failed\n", __func__);
|
|
goto fail;
|
|
}
|
|
|
|
ret = dsi_clk_init(msm_host);
|
|
if (ret) {
|
|
pr_err("%s: unable to initialize dsi clks\n", __func__);
|
|
goto fail;
|
|
}
|
|
|
|
msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
|
|
if (!msm_host->rx_buf) {
|
|
ret = -ENOMEM;
|
|
pr_err("%s: alloc rx temp buf failed\n", __func__);
|
|
goto fail;
|
|
}
|
|
|
|
init_completion(&msm_host->dma_comp);
|
|
init_completion(&msm_host->video_comp);
|
|
mutex_init(&msm_host->dev_mutex);
|
|
mutex_init(&msm_host->cmd_mutex);
|
|
mutex_init(&msm_host->clk_mutex);
|
|
spin_lock_init(&msm_host->intr_lock);
|
|
|
|
/* setup workqueue */
|
|
msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
|
|
INIT_WORK(&msm_host->err_work, dsi_err_worker);
|
|
INIT_WORK(&msm_host->hpd_work, dsi_hpd_worker);
|
|
|
|
msm_dsi->host = &msm_host->base;
|
|
msm_dsi->id = msm_host->id;
|
|
|
|
DBG("Dsi Host %d initialized", msm_host->id);
|
|
return 0;
|
|
|
|
fail:
|
|
return ret;
|
|
}
|
|
|
|
void msm_dsi_host_destroy(struct mipi_dsi_host *host)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
DBG("");
|
|
dsi_tx_buf_free(msm_host);
|
|
if (msm_host->workqueue) {
|
|
flush_workqueue(msm_host->workqueue);
|
|
destroy_workqueue(msm_host->workqueue);
|
|
msm_host->workqueue = NULL;
|
|
}
|
|
|
|
mutex_destroy(&msm_host->clk_mutex);
|
|
mutex_destroy(&msm_host->cmd_mutex);
|
|
mutex_destroy(&msm_host->dev_mutex);
|
|
}
|
|
|
|
int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
|
|
struct drm_device *dev)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
struct platform_device *pdev = msm_host->pdev;
|
|
int ret;
|
|
|
|
msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
|
|
if (msm_host->irq < 0) {
|
|
ret = msm_host->irq;
|
|
dev_err(dev->dev, "failed to get irq: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = devm_request_irq(&pdev->dev, msm_host->irq,
|
|
dsi_host_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
|
|
"dsi_isr", msm_host);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
|
|
msm_host->irq, ret);
|
|
return ret;
|
|
}
|
|
|
|
msm_host->dev = dev;
|
|
ret = dsi_tx_buf_alloc(msm_host, SZ_4K);
|
|
if (ret) {
|
|
pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
int ret;
|
|
|
|
/* Register mipi dsi host */
|
|
if (!msm_host->registered) {
|
|
host->dev = &msm_host->pdev->dev;
|
|
host->ops = &dsi_host_ops;
|
|
ret = mipi_dsi_host_register(host);
|
|
if (ret)
|
|
return ret;
|
|
|
|
msm_host->registered = true;
|
|
|
|
/* If the panel driver has not been probed after host register,
|
|
* we should defer the host's probe.
|
|
* It makes sure panel is connected when fbcon detects
|
|
* connector status and gets the proper display mode to
|
|
* create framebuffer.
|
|
* Don't try to defer if there is nothing connected to the dsi
|
|
* output
|
|
*/
|
|
if (check_defer && msm_host->device_node) {
|
|
if (!of_drm_find_panel(msm_host->device_node))
|
|
if (!of_drm_find_bridge(msm_host->device_node))
|
|
return -EPROBE_DEFER;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void msm_dsi_host_unregister(struct mipi_dsi_host *host)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
if (msm_host->registered) {
|
|
mipi_dsi_host_unregister(host);
|
|
host->dev = NULL;
|
|
host->ops = NULL;
|
|
msm_host->registered = false;
|
|
}
|
|
}
|
|
|
|
int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
|
|
const struct mipi_dsi_msg *msg)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
/* TODO: make sure dsi_cmd_mdp is idle.
|
|
* Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
|
|
* to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
|
|
* How to handle the old versions? Wait for mdp cmd done?
|
|
*/
|
|
|
|
/*
|
|
* mdss interrupt is generated in mdp core clock domain
|
|
* mdp clock need to be enabled to receive dsi interrupt
|
|
*/
|
|
dsi_clk_ctrl(msm_host, 1);
|
|
|
|
/* TODO: vote for bus bandwidth */
|
|
|
|
if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
|
|
dsi_set_tx_power_mode(0, msm_host);
|
|
|
|
msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
|
|
dsi_write(msm_host, REG_DSI_CTRL,
|
|
msm_host->dma_cmd_ctrl_restore |
|
|
DSI_CTRL_CMD_MODE_EN |
|
|
DSI_CTRL_ENABLE);
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
|
|
const struct mipi_dsi_msg *msg)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
|
|
dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
|
|
|
|
if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
|
|
dsi_set_tx_power_mode(1, msm_host);
|
|
|
|
/* TODO: unvote for bus bandwidth */
|
|
|
|
dsi_clk_ctrl(msm_host, 0);
|
|
}
|
|
|
|
int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
|
|
const struct mipi_dsi_msg *msg)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
return dsi_cmds2buf_tx(msm_host, msg);
|
|
}
|
|
|
|
int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
|
|
const struct mipi_dsi_msg *msg)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
int data_byte, rx_byte, dlen, end;
|
|
int short_response, diff, pkt_size, ret = 0;
|
|
char cmd;
|
|
int rlen = msg->rx_len;
|
|
u8 *buf;
|
|
|
|
if (rlen <= 2) {
|
|
short_response = 1;
|
|
pkt_size = rlen;
|
|
rx_byte = 4;
|
|
} else {
|
|
short_response = 0;
|
|
data_byte = 10; /* first read */
|
|
if (rlen < data_byte)
|
|
pkt_size = rlen;
|
|
else
|
|
pkt_size = data_byte;
|
|
rx_byte = data_byte + 6; /* 4 header + 2 crc */
|
|
}
|
|
|
|
buf = msm_host->rx_buf;
|
|
end = 0;
|
|
while (!end) {
|
|
u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
|
|
struct mipi_dsi_msg max_pkt_size_msg = {
|
|
.channel = msg->channel,
|
|
.type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
|
|
.tx_len = 2,
|
|
.tx_buf = tx,
|
|
};
|
|
|
|
DBG("rlen=%d pkt_size=%d rx_byte=%d",
|
|
rlen, pkt_size, rx_byte);
|
|
|
|
ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
|
|
if (ret < 2) {
|
|
pr_err("%s: Set max pkt size failed, %d\n",
|
|
__func__, ret);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
|
|
(cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
|
|
/* Clear the RDBK_DATA registers */
|
|
dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
|
|
DSI_RDBK_DATA_CTRL_CLR);
|
|
wmb(); /* make sure the RDBK registers are cleared */
|
|
dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
|
|
wmb(); /* release cleared status before transfer */
|
|
}
|
|
|
|
ret = dsi_cmds2buf_tx(msm_host, msg);
|
|
if (ret < msg->tx_len) {
|
|
pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* once cmd_dma_done interrupt received,
|
|
* return data from client is ready and stored
|
|
* at RDBK_DATA register already
|
|
* since rx fifo is 16 bytes, dcs header is kept at first loop,
|
|
* after that dcs header lost during shift into registers
|
|
*/
|
|
dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
|
|
|
|
if (dlen <= 0)
|
|
return 0;
|
|
|
|
if (short_response)
|
|
break;
|
|
|
|
if (rlen <= data_byte) {
|
|
diff = data_byte - rlen;
|
|
end = 1;
|
|
} else {
|
|
diff = 0;
|
|
rlen -= data_byte;
|
|
}
|
|
|
|
if (!end) {
|
|
dlen -= 2; /* 2 crc */
|
|
dlen -= diff;
|
|
buf += dlen; /* next start position */
|
|
data_byte = 14; /* NOT first read */
|
|
if (rlen < data_byte)
|
|
pkt_size += rlen;
|
|
else
|
|
pkt_size += data_byte;
|
|
DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For single Long read, if the requested rlen < 10,
|
|
* we need to shift the start position of rx
|
|
* data buffer to skip the bytes which are not
|
|
* updated.
|
|
*/
|
|
if (pkt_size < 10 && !short_response)
|
|
buf = msm_host->rx_buf + (10 - rlen);
|
|
else
|
|
buf = msm_host->rx_buf;
|
|
|
|
cmd = buf[0];
|
|
switch (cmd) {
|
|
case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
|
|
pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
|
|
ret = 0;
|
|
break;
|
|
case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
|
|
case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
|
|
ret = dsi_short_read1_resp(buf, msg);
|
|
break;
|
|
case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
|
|
case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
|
|
ret = dsi_short_read2_resp(buf, msg);
|
|
break;
|
|
case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
|
|
case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
|
|
ret = dsi_long_read_resp(buf, msg);
|
|
break;
|
|
default:
|
|
pr_warn("%s:Invalid response cmd\n", __func__);
|
|
ret = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
|
|
u32 len)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
|
|
dsi_write(msm_host, REG_DSI_DMA_LEN, len);
|
|
dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
|
|
|
|
/* Make sure trigger happens */
|
|
wmb();
|
|
}
|
|
|
|
int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
|
|
struct msm_dsi_pll *src_pll)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
|
|
struct clk *byte_clk_provider, *pixel_clk_provider;
|
|
int ret;
|
|
|
|
ret = msm_dsi_pll_get_clk_provider(src_pll,
|
|
&byte_clk_provider, &pixel_clk_provider);
|
|
if (ret) {
|
|
pr_info("%s: can't get provider from pll, don't set parent\n",
|
|
__func__);
|
|
return 0;
|
|
}
|
|
|
|
ret = clk_set_parent(msm_host->byte_clk_src, byte_clk_provider);
|
|
if (ret) {
|
|
pr_err("%s: can't set parent to byte_clk_src. ret=%d\n",
|
|
__func__, ret);
|
|
goto exit;
|
|
}
|
|
|
|
ret = clk_set_parent(msm_host->pixel_clk_src, pixel_clk_provider);
|
|
if (ret) {
|
|
pr_err("%s: can't set parent to pixel_clk_src. ret=%d\n",
|
|
__func__, ret);
|
|
goto exit;
|
|
}
|
|
|
|
if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
|
|
ret = clk_set_parent(msm_host->dsi_clk_src, pixel_clk_provider);
|
|
if (ret) {
|
|
pr_err("%s: can't set parent to dsi_clk_src. ret=%d\n",
|
|
__func__, ret);
|
|
goto exit;
|
|
}
|
|
|
|
ret = clk_set_parent(msm_host->esc_clk_src, byte_clk_provider);
|
|
if (ret) {
|
|
pr_err("%s: can't set parent to esc_clk_src. ret=%d\n",
|
|
__func__, ret);
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
exit:
|
|
return ret;
|
|
}
|
|
|
|
int msm_dsi_host_enable(struct mipi_dsi_host *host)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
dsi_op_mode_config(msm_host,
|
|
!!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
|
|
|
|
/* TODO: clock should be turned off for command mode,
|
|
* and only turned on before MDP START.
|
|
* This part of code should be enabled once mdp driver support it.
|
|
*/
|
|
/* if (msm_panel->mode == MSM_DSI_CMD_MODE)
|
|
dsi_clk_ctrl(msm_host, 0); */
|
|
|
|
return 0;
|
|
}
|
|
|
|
int msm_dsi_host_disable(struct mipi_dsi_host *host)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
dsi_op_mode_config(msm_host,
|
|
!!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
|
|
|
|
/* Since we have disabled INTF, the video engine won't stop so that
|
|
* the cmd engine will be blocked.
|
|
* Reset to disable video engine so that we can send off cmd.
|
|
*/
|
|
dsi_sw_reset(msm_host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
|
|
{
|
|
enum sfpb_ahb_arb_master_port_en en;
|
|
|
|
if (!msm_host->sfpb)
|
|
return;
|
|
|
|
en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
|
|
|
|
regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
|
|
SFPB_GPREG_MASTER_PORT_EN__MASK,
|
|
SFPB_GPREG_MASTER_PORT_EN(en));
|
|
}
|
|
|
|
int msm_dsi_host_power_on(struct mipi_dsi_host *host)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
u32 clk_pre = 0, clk_post = 0;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&msm_host->dev_mutex);
|
|
if (msm_host->power_on) {
|
|
DBG("dsi host already on");
|
|
goto unlock_ret;
|
|
}
|
|
|
|
msm_dsi_sfpb_config(msm_host, true);
|
|
|
|
ret = dsi_calc_clk_rate(msm_host);
|
|
if (ret) {
|
|
pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
|
|
goto unlock_ret;
|
|
}
|
|
|
|
ret = dsi_host_regulator_enable(msm_host);
|
|
if (ret) {
|
|
pr_err("%s:Failed to enable vregs.ret=%d\n",
|
|
__func__, ret);
|
|
goto unlock_ret;
|
|
}
|
|
|
|
ret = dsi_bus_clk_enable(msm_host);
|
|
if (ret) {
|
|
pr_err("%s: failed to enable bus clocks, %d\n", __func__, ret);
|
|
goto fail_disable_reg;
|
|
}
|
|
|
|
dsi_phy_sw_reset(msm_host);
|
|
ret = msm_dsi_manager_phy_enable(msm_host->id,
|
|
msm_host->byte_clk_rate * 8,
|
|
msm_host->esc_clk_rate,
|
|
&clk_pre, &clk_post);
|
|
dsi_bus_clk_disable(msm_host);
|
|
if (ret) {
|
|
pr_err("%s: failed to enable phy, %d\n", __func__, ret);
|
|
goto fail_disable_reg;
|
|
}
|
|
|
|
ret = dsi_clk_ctrl(msm_host, 1);
|
|
if (ret) {
|
|
pr_err("%s: failed to enable clocks. ret=%d\n", __func__, ret);
|
|
goto fail_disable_reg;
|
|
}
|
|
|
|
ret = pinctrl_pm_select_default_state(&msm_host->pdev->dev);
|
|
if (ret) {
|
|
pr_err("%s: failed to set pinctrl default state, %d\n",
|
|
__func__, ret);
|
|
goto fail_disable_clk;
|
|
}
|
|
|
|
dsi_timing_setup(msm_host);
|
|
dsi_sw_reset(msm_host);
|
|
dsi_ctrl_config(msm_host, true, clk_pre, clk_post);
|
|
|
|
if (msm_host->disp_en_gpio)
|
|
gpiod_set_value(msm_host->disp_en_gpio, 1);
|
|
|
|
msm_host->power_on = true;
|
|
mutex_unlock(&msm_host->dev_mutex);
|
|
|
|
return 0;
|
|
|
|
fail_disable_clk:
|
|
dsi_clk_ctrl(msm_host, 0);
|
|
fail_disable_reg:
|
|
dsi_host_regulator_disable(msm_host);
|
|
unlock_ret:
|
|
mutex_unlock(&msm_host->dev_mutex);
|
|
return ret;
|
|
}
|
|
|
|
int msm_dsi_host_power_off(struct mipi_dsi_host *host)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
mutex_lock(&msm_host->dev_mutex);
|
|
if (!msm_host->power_on) {
|
|
DBG("dsi host already off");
|
|
goto unlock_ret;
|
|
}
|
|
|
|
dsi_ctrl_config(msm_host, false, 0, 0);
|
|
|
|
if (msm_host->disp_en_gpio)
|
|
gpiod_set_value(msm_host->disp_en_gpio, 0);
|
|
|
|
pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
|
|
|
|
msm_dsi_manager_phy_disable(msm_host->id);
|
|
|
|
dsi_clk_ctrl(msm_host, 0);
|
|
|
|
dsi_host_regulator_disable(msm_host);
|
|
|
|
msm_dsi_sfpb_config(msm_host, false);
|
|
|
|
DBG("-");
|
|
|
|
msm_host->power_on = false;
|
|
|
|
unlock_ret:
|
|
mutex_unlock(&msm_host->dev_mutex);
|
|
return 0;
|
|
}
|
|
|
|
int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
|
|
struct drm_display_mode *mode)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
if (msm_host->mode) {
|
|
drm_mode_destroy(msm_host->dev, msm_host->mode);
|
|
msm_host->mode = NULL;
|
|
}
|
|
|
|
msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
|
|
if (!msm_host->mode) {
|
|
pr_err("%s: cannot duplicate mode\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
|
|
unsigned long *panel_flags)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
struct drm_panel *panel;
|
|
|
|
panel = of_drm_find_panel(msm_host->device_node);
|
|
if (panel_flags)
|
|
*panel_flags = msm_host->mode_flags;
|
|
|
|
return panel;
|
|
}
|
|
|
|
struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host)
|
|
{
|
|
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
|
|
|
|
return of_drm_find_bridge(msm_host->device_node);
|
|
}
|