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linux_dsm_epyc7002/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
Yannick Fertré fc13d71002 drm/panel: otm8009a: Set clock to 29.70 Mhz 
The panel does not support clock frequency over 30.74 MHz. The clock
rate has been reduced to 29.70 MHz & new timings have been computed to
get a framerate of 50 fps.

Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1553155646-13636-1-git-send-email-yannick.fertre@st.com
2019-04-03 18:44:42 +02:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics SA 2017
*
* Authors: Philippe Cornu <philippe.cornu@st.com>
* Yannick Fertre <yannick.fertre@st.com>
*/
#include <drm/drmP.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
#include <linux/backlight.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
#define OTM8009A_BACKLIGHT_DEFAULT 240
#define OTM8009A_BACKLIGHT_MAX 255
/* Manufacturer Command Set */
#define MCS_ADRSFT 0x0000 /* Address Shift Function */
#define MCS_PANSET 0xB3A6 /* Panel Type Setting */
#define MCS_SD_CTRL 0xC0A2 /* Source Driver Timing Setting */
#define MCS_P_DRV_M 0xC0B4 /* Panel Driving Mode */
#define MCS_OSC_ADJ 0xC181 /* Oscillator Adjustment for Idle/Normal mode */
#define MCS_RGB_VID_SET 0xC1A1 /* RGB Video Mode Setting */
#define MCS_SD_PCH_CTRL 0xC480 /* Source Driver Precharge Control */
#define MCS_NO_DOC1 0xC48A /* Command not documented */
#define MCS_PWR_CTRL1 0xC580 /* Power Control Setting 1 */
#define MCS_PWR_CTRL2 0xC590 /* Power Control Setting 2 for Normal Mode */
#define MCS_PWR_CTRL4 0xC5B0 /* Power Control Setting 4 for DC Voltage */
#define MCS_PANCTRLSET1 0xCB80 /* Panel Control Setting 1 */
#define MCS_PANCTRLSET2 0xCB90 /* Panel Control Setting 2 */
#define MCS_PANCTRLSET3 0xCBA0 /* Panel Control Setting 3 */
#define MCS_PANCTRLSET4 0xCBB0 /* Panel Control Setting 4 */
#define MCS_PANCTRLSET5 0xCBC0 /* Panel Control Setting 5 */
#define MCS_PANCTRLSET6 0xCBD0 /* Panel Control Setting 6 */
#define MCS_PANCTRLSET7 0xCBE0 /* Panel Control Setting 7 */
#define MCS_PANCTRLSET8 0xCBF0 /* Panel Control Setting 8 */
#define MCS_PANU2D1 0xCC80 /* Panel U2D Setting 1 */
#define MCS_PANU2D2 0xCC90 /* Panel U2D Setting 2 */
#define MCS_PANU2D3 0xCCA0 /* Panel U2D Setting 3 */
#define MCS_PAND2U1 0xCCB0 /* Panel D2U Setting 1 */
#define MCS_PAND2U2 0xCCC0 /* Panel D2U Setting 2 */
#define MCS_PAND2U3 0xCCD0 /* Panel D2U Setting 3 */
#define MCS_GOAVST 0xCE80 /* GOA VST Setting */
#define MCS_GOACLKA1 0xCEA0 /* GOA CLKA1 Setting */
#define MCS_GOACLKA3 0xCEB0 /* GOA CLKA3 Setting */
#define MCS_GOAECLK 0xCFC0 /* GOA ECLK Setting */
#define MCS_NO_DOC2 0xCFD0 /* Command not documented */
#define MCS_GVDDSET 0xD800 /* GVDD/NGVDD */
#define MCS_VCOMDC 0xD900 /* VCOM Voltage Setting */
#define MCS_GMCT2_2P 0xE100 /* Gamma Correction 2.2+ Setting */
#define MCS_GMCT2_2N 0xE200 /* Gamma Correction 2.2- Setting */
#define MCS_NO_DOC3 0xF5B6 /* Command not documented */
#define MCS_CMD2_ENA1 0xFF00 /* Enable Access Command2 "CMD2" */
#define MCS_CMD2_ENA2 0xFF80 /* Enable Access Orise Command2 */
struct otm8009a {
struct device *dev;
struct drm_panel panel;
struct backlight_device *bl_dev;
struct gpio_desc *reset_gpio;
struct regulator *supply;
bool prepared;
bool enabled;
};
static const struct drm_display_mode default_mode = {
.clock = 29700,
.hdisplay = 480,
.hsync_start = 480 + 98,
.hsync_end = 480 + 98 + 32,
.htotal = 480 + 98 + 32 + 98,
.vdisplay = 800,
.vsync_start = 800 + 15,
.vsync_end = 800 + 15 + 10,
.vtotal = 800 + 15 + 10 + 14,
.vrefresh = 50,
.flags = 0,
.width_mm = 52,
.height_mm = 86,
};
static inline struct otm8009a *panel_to_otm8009a(struct drm_panel *panel)
{
return container_of(panel, struct otm8009a, panel);
}
static void otm8009a_dcs_write_buf(struct otm8009a *ctx, const void *data,
size_t len)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
if (mipi_dsi_dcs_write_buffer(dsi, data, len) < 0)
DRM_WARN("mipi dsi dcs write buffer failed\n");
}
static void otm8009a_dcs_write_buf_hs(struct otm8009a *ctx, const void *data,
size_t len)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
/* data will be sent in dsi hs mode (ie. no lpm) */
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
otm8009a_dcs_write_buf(ctx, data, len);
/* restore back the dsi lpm mode */
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
}
#define dcs_write_seq(ctx, seq...) \
({ \
static const u8 d[] = { seq }; \
otm8009a_dcs_write_buf(ctx, d, ARRAY_SIZE(d)); \
})
#define dcs_write_cmd_at(ctx, cmd, seq...) \
({ \
dcs_write_seq(ctx, MCS_ADRSFT, (cmd) & 0xFF); \
dcs_write_seq(ctx, (cmd) >> 8, seq); \
})
static int otm8009a_init_sequence(struct otm8009a *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
/* Enter CMD2 */
dcs_write_cmd_at(ctx, MCS_CMD2_ENA1, 0x80, 0x09, 0x01);
/* Enter Orise Command2 */
dcs_write_cmd_at(ctx, MCS_CMD2_ENA2, 0x80, 0x09);
dcs_write_cmd_at(ctx, MCS_SD_PCH_CTRL, 0x30);
mdelay(10);
dcs_write_cmd_at(ctx, MCS_NO_DOC1, 0x40);
mdelay(10);
dcs_write_cmd_at(ctx, MCS_PWR_CTRL4 + 1, 0xA9);
dcs_write_cmd_at(ctx, MCS_PWR_CTRL2 + 1, 0x34);
dcs_write_cmd_at(ctx, MCS_P_DRV_M, 0x50);
dcs_write_cmd_at(ctx, MCS_VCOMDC, 0x4E);
dcs_write_cmd_at(ctx, MCS_OSC_ADJ, 0x66); /* 65Hz */
dcs_write_cmd_at(ctx, MCS_PWR_CTRL2 + 2, 0x01);
dcs_write_cmd_at(ctx, MCS_PWR_CTRL2 + 5, 0x34);
dcs_write_cmd_at(ctx, MCS_PWR_CTRL2 + 4, 0x33);
dcs_write_cmd_at(ctx, MCS_GVDDSET, 0x79, 0x79);
dcs_write_cmd_at(ctx, MCS_SD_CTRL + 1, 0x1B);
dcs_write_cmd_at(ctx, MCS_PWR_CTRL1 + 2, 0x83);
dcs_write_cmd_at(ctx, MCS_SD_PCH_CTRL + 1, 0x83);
dcs_write_cmd_at(ctx, MCS_RGB_VID_SET, 0x0E);
dcs_write_cmd_at(ctx, MCS_PANSET, 0x00, 0x01);
dcs_write_cmd_at(ctx, MCS_GOAVST, 0x85, 0x01, 0x00, 0x84, 0x01, 0x00);
dcs_write_cmd_at(ctx, MCS_GOACLKA1, 0x18, 0x04, 0x03, 0x39, 0x00, 0x00,
0x00, 0x18, 0x03, 0x03, 0x3A, 0x00, 0x00, 0x00);
dcs_write_cmd_at(ctx, MCS_GOACLKA3, 0x18, 0x02, 0x03, 0x3B, 0x00, 0x00,
0x00, 0x18, 0x01, 0x03, 0x3C, 0x00, 0x00, 0x00);
dcs_write_cmd_at(ctx, MCS_GOAECLK, 0x01, 0x01, 0x20, 0x20, 0x00, 0x00,
0x01, 0x02, 0x00, 0x00);
dcs_write_cmd_at(ctx, MCS_NO_DOC2, 0x00);
dcs_write_cmd_at(ctx, MCS_PANCTRLSET1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
dcs_write_cmd_at(ctx, MCS_PANCTRLSET2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0);
dcs_write_cmd_at(ctx, MCS_PANCTRLSET3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0);
dcs_write_cmd_at(ctx, MCS_PANCTRLSET4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
dcs_write_cmd_at(ctx, MCS_PANCTRLSET5, 0, 4, 4, 4, 4, 4, 0, 0, 0, 0,
0, 0, 0, 0, 0);
dcs_write_cmd_at(ctx, MCS_PANCTRLSET6, 0, 0, 0, 0, 0, 0, 4, 4, 4, 4,
4, 0, 0, 0, 0);
dcs_write_cmd_at(ctx, MCS_PANCTRLSET7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
dcs_write_cmd_at(ctx, MCS_PANCTRLSET8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF);
dcs_write_cmd_at(ctx, MCS_PANU2D1, 0x00, 0x26, 0x09, 0x0B, 0x01, 0x25,
0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_at(ctx, MCS_PANU2D2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x26, 0x0A, 0x0C, 0x02);
dcs_write_cmd_at(ctx, MCS_PANU2D3, 0x25, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_at(ctx, MCS_PAND2U1, 0x00, 0x25, 0x0C, 0x0A, 0x02, 0x26,
0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_at(ctx, MCS_PAND2U2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x25, 0x0B, 0x09, 0x01);
dcs_write_cmd_at(ctx, MCS_PAND2U3, 0x26, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_at(ctx, MCS_PWR_CTRL1 + 1, 0x66);
dcs_write_cmd_at(ctx, MCS_NO_DOC3, 0x06);
dcs_write_cmd_at(ctx, MCS_GMCT2_2P, 0x00, 0x09, 0x0F, 0x0E, 0x07, 0x10,
0x0B, 0x0A, 0x04, 0x07, 0x0B, 0x08, 0x0F, 0x10, 0x0A,
0x01);
dcs_write_cmd_at(ctx, MCS_GMCT2_2N, 0x00, 0x09, 0x0F, 0x0E, 0x07, 0x10,
0x0B, 0x0A, 0x04, 0x07, 0x0B, 0x08, 0x0F, 0x10, 0x0A,
0x01);
/* Exit CMD2 */
dcs_write_cmd_at(ctx, MCS_CMD2_ENA1, 0xFF, 0xFF, 0xFF);
ret = mipi_dsi_dcs_nop(dsi);
if (ret)
return ret;
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret)
return ret;
/* Wait for sleep out exit */
mdelay(120);
/* Default portrait 480x800 rgb24 */
dcs_write_seq(ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
ret = mipi_dsi_dcs_set_column_address(dsi, 0,
default_mode.hdisplay - 1);
if (ret)
return ret;
ret = mipi_dsi_dcs_set_page_address(dsi, 0, default_mode.vdisplay - 1);
if (ret)
return ret;
/* See otm8009a driver documentation for pixel format descriptions */
ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
MIPI_DCS_PIXEL_FMT_24BIT << 4);
if (ret)
return ret;
/* Disable CABC feature */
dcs_write_seq(ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret)
return ret;
ret = mipi_dsi_dcs_nop(dsi);
if (ret)
return ret;
/* Send Command GRAM memory write (no parameters) */
dcs_write_seq(ctx, MIPI_DCS_WRITE_MEMORY_START);
/* Wait a short while to let the panel be ready before the 1st frame */
mdelay(10);
return 0;
}
static int otm8009a_disable(struct drm_panel *panel)
{
struct otm8009a *ctx = panel_to_otm8009a(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
if (!ctx->enabled)
return 0; /* This is not an issue so we return 0 here */
backlight_disable(ctx->bl_dev);
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret)
return ret;
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret)
return ret;
msleep(120);
ctx->enabled = false;
return 0;
}
static int otm8009a_unprepare(struct drm_panel *panel)
{
struct otm8009a *ctx = panel_to_otm8009a(panel);
if (!ctx->prepared)
return 0;
if (ctx->reset_gpio) {
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
msleep(20);
}
regulator_disable(ctx->supply);
ctx->prepared = false;
return 0;
}
static int otm8009a_prepare(struct drm_panel *panel)
{
struct otm8009a *ctx = panel_to_otm8009a(panel);
int ret;
if (ctx->prepared)
return 0;
ret = regulator_enable(ctx->supply);
if (ret < 0) {
DRM_ERROR("failed to enable supply: %d\n", ret);
return ret;
}
if (ctx->reset_gpio) {
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
msleep(20);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
msleep(100);
}
ret = otm8009a_init_sequence(ctx);
if (ret)
return ret;
ctx->prepared = true;
return 0;
}
static int otm8009a_enable(struct drm_panel *panel)
{
struct otm8009a *ctx = panel_to_otm8009a(panel);
if (ctx->enabled)
return 0;
backlight_enable(ctx->bl_dev);
ctx->enabled = true;
return 0;
}
static int otm8009a_get_modes(struct drm_panel *panel)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(panel->drm, &default_mode);
if (!mode) {
DRM_ERROR("failed to add mode %ux%ux@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
default_mode.vrefresh);
return -ENOMEM;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(panel->connector, mode);
panel->connector->display_info.width_mm = mode->width_mm;
panel->connector->display_info.height_mm = mode->height_mm;
return 1;
}
static const struct drm_panel_funcs otm8009a_drm_funcs = {
.disable = otm8009a_disable,
.unprepare = otm8009a_unprepare,
.prepare = otm8009a_prepare,
.enable = otm8009a_enable,
.get_modes = otm8009a_get_modes,
};
/*
* DSI-BASED BACKLIGHT
*/
static int otm8009a_backlight_update_status(struct backlight_device *bd)
{
struct otm8009a *ctx = bl_get_data(bd);
u8 data[2];
if (!ctx->prepared) {
DRM_DEBUG("lcd not ready yet for setting its backlight!\n");
return -ENXIO;
}
if (bd->props.power <= FB_BLANK_NORMAL) {
/* Power on the backlight with the requested brightness
* Note We can not use mipi_dsi_dcs_set_display_brightness()
* as otm8009a driver support only 8-bit brightness (1 param).
*/
data[0] = MIPI_DCS_SET_DISPLAY_BRIGHTNESS;
data[1] = bd->props.brightness;
otm8009a_dcs_write_buf_hs(ctx, data, ARRAY_SIZE(data));
/* set Brightness Control & Backlight on */
data[1] = 0x24;
} else {
/* Power off the backlight: set Brightness Control & Bl off */
data[1] = 0;
}
/* Update Brightness Control & Backlight */
data[0] = MIPI_DCS_WRITE_CONTROL_DISPLAY;
otm8009a_dcs_write_buf_hs(ctx, data, ARRAY_SIZE(data));
return 0;
}
static const struct backlight_ops otm8009a_backlight_ops = {
.update_status = otm8009a_backlight_update_status,
};
static int otm8009a_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct otm8009a *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
dev_err(dev, "cannot get reset-gpio\n");
return PTR_ERR(ctx->reset_gpio);
}
ctx->supply = devm_regulator_get(dev, "power");
if (IS_ERR(ctx->supply)) {
ret = PTR_ERR(ctx->supply);
if (ret != -EPROBE_DEFER)
dev_err(dev, "failed to request regulator: %d\n", ret);
return ret;
}
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;
dsi->lanes = 2;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM;
drm_panel_init(&ctx->panel);
ctx->panel.dev = dev;
ctx->panel.funcs = &otm8009a_drm_funcs;
ctx->bl_dev = devm_backlight_device_register(dev, dev_name(dev),
dsi->host->dev, ctx,
&otm8009a_backlight_ops,
NULL);
if (IS_ERR(ctx->bl_dev)) {
ret = PTR_ERR(ctx->bl_dev);
dev_err(dev, "failed to register backlight: %d\n", ret);
return ret;
}
ctx->bl_dev->props.max_brightness = OTM8009A_BACKLIGHT_MAX;
ctx->bl_dev->props.brightness = OTM8009A_BACKLIGHT_DEFAULT;
ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
ctx->bl_dev->props.type = BACKLIGHT_RAW;
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(dev, "mipi_dsi_attach failed. Is host ready?\n");
drm_panel_remove(&ctx->panel);
backlight_device_unregister(ctx->bl_dev);
return ret;
}
return 0;
}
static int otm8009a_remove(struct mipi_dsi_device *dsi)
{
struct otm8009a *ctx = mipi_dsi_get_drvdata(dsi);
mipi_dsi_detach(dsi);
drm_panel_remove(&ctx->panel);
return 0;
}
static const struct of_device_id orisetech_otm8009a_of_match[] = {
{ .compatible = "orisetech,otm8009a" },
{ }
};
MODULE_DEVICE_TABLE(of, orisetech_otm8009a_of_match);
static struct mipi_dsi_driver orisetech_otm8009a_driver = {
.probe = otm8009a_probe,
.remove = otm8009a_remove,
.driver = {
.name = "panel-orisetech-otm8009a",
.of_match_table = orisetech_otm8009a_of_match,
},
};
module_mipi_dsi_driver(orisetech_otm8009a_driver);
MODULE_AUTHOR("Philippe Cornu <philippe.cornu@st.com>");
MODULE_AUTHOR("Yannick Fertre <yannick.fertre@st.com>");
MODULE_DESCRIPTION("DRM driver for Orise Tech OTM8009A MIPI DSI panel");
MODULE_LICENSE("GPL v2");
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