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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4e5ca2d930
Add a check to ensure iowrite64 is only used if it is atomic.
It was decided in [1] that the tilcdc driver should not be using an
atomic operation (so it was left out of this patchset). However, it turns
out that through the drm code, a nonatomic header is actually included:
include/linux/io-64-nonatomic-lo-hi.h
is included from include/drm/drm_os_linux.h:9:0,
from include/drm/drmP.h:74,
from include/drm/drm_modeset_helper.h:26,
from include/drm/drm_atomic_helper.h:33,
from drivers/gpu/drm/tilcdc/tilcdc_crtc.c:19:
And thus, without this change, this patchset would inadvertantly
change the behaviour of the tilcdc driver.
[1] lkml.kernel.org/r/CAK8P3a2HhO_zCnsTzq7hmWSz5La5Thu19FWZpun16iMnyyNreQ@mail.gmail.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jyri Sarha <jsarha@ti.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
185 lines
7.0 KiB
C
185 lines
7.0 KiB
C
/*
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* Copyright (C) 2012 Texas Instruments
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __TILCDC_REGS_H__
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#define __TILCDC_REGS_H__
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/* LCDC register definitions, based on da8xx-fb */
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#include <linux/bitops.h>
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#include "tilcdc_drv.h"
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/* LCDC Status Register */
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#define LCDC_END_OF_FRAME1 BIT(9)
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#define LCDC_END_OF_FRAME0 BIT(8)
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#define LCDC_PL_LOAD_DONE BIT(6)
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#define LCDC_FIFO_UNDERFLOW BIT(5)
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#define LCDC_SYNC_LOST BIT(2)
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#define LCDC_FRAME_DONE BIT(0)
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/* LCDC DMA Control Register */
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#define LCDC_DMA_BURST_SIZE(x) ((x) << 4)
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#define LCDC_DMA_BURST_SIZE_MASK ((0x7) << 4)
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#define LCDC_DMA_BURST_1 0x0
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#define LCDC_DMA_BURST_2 0x1
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#define LCDC_DMA_BURST_4 0x2
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#define LCDC_DMA_BURST_8 0x3
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#define LCDC_DMA_BURST_16 0x4
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#define LCDC_DMA_FIFO_THRESHOLD(x) ((x) << 8)
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#define LCDC_DMA_FIFO_THRESHOLD_MASK ((0x3) << 8)
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#define LCDC_V1_END_OF_FRAME_INT_ENA BIT(2)
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#define LCDC_V2_END_OF_FRAME0_INT_ENA BIT(8)
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#define LCDC_V2_END_OF_FRAME1_INT_ENA BIT(9)
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#define LCDC_DUAL_FRAME_BUFFER_ENABLE BIT(0)
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/* LCDC Control Register */
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#define LCDC_CLK_DIVISOR(x) ((x) << 8)
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#define LCDC_CLK_DIVISOR_MASK ((0xFF) << 8)
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#define LCDC_RASTER_MODE 0x01
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/* LCDC Raster Control Register */
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#define LCDC_PALETTE_LOAD_MODE(x) ((x) << 20)
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#define LCDC_PALETTE_LOAD_MODE_MASK ((0x3) << 20)
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#define PALETTE_AND_DATA 0x00
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#define PALETTE_ONLY 0x01
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#define DATA_ONLY 0x02
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#define LCDC_MONO_8BIT_MODE BIT(9)
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#define LCDC_RASTER_ORDER BIT(8)
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#define LCDC_TFT_MODE BIT(7)
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#define LCDC_V1_UNDERFLOW_INT_ENA BIT(6)
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#define LCDC_V2_UNDERFLOW_INT_ENA BIT(5)
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#define LCDC_V1_PL_INT_ENA BIT(4)
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#define LCDC_V2_PL_INT_ENA BIT(6)
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#define LCDC_V1_SYNC_LOST_INT_ENA BIT(5)
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#define LCDC_V1_FRAME_DONE_INT_ENA BIT(3)
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#define LCDC_MONOCHROME_MODE BIT(1)
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#define LCDC_RASTER_ENABLE BIT(0)
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#define LCDC_TFT_ALT_ENABLE BIT(23)
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#define LCDC_STN_565_ENABLE BIT(24)
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#define LCDC_V2_DMA_CLK_EN BIT(2)
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#define LCDC_V2_LIDD_CLK_EN BIT(1)
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#define LCDC_V2_CORE_CLK_EN BIT(0)
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#define LCDC_V2_LPP_B10 26
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#define LCDC_V2_TFT_24BPP_MODE BIT(25)
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#define LCDC_V2_TFT_24BPP_UNPACK BIT(26)
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/* LCDC Raster Timing 2 Register */
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#define LCDC_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
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#define LCDC_AC_BIAS_TRANSITIONS_PER_INT_MASK ((0xF) << 16)
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#define LCDC_AC_BIAS_FREQUENCY(x) ((x) << 8)
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#define LCDC_AC_BIAS_FREQUENCY_MASK ((0xFF) << 8)
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#define LCDC_SYNC_CTRL BIT(25)
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#define LCDC_SYNC_EDGE BIT(24)
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#define LCDC_INVERT_PIXEL_CLOCK BIT(22)
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#define LCDC_INVERT_HSYNC BIT(21)
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#define LCDC_INVERT_VSYNC BIT(20)
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#define LCDC_LPP_B10 BIT(26)
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/* LCDC Block */
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#define LCDC_PID_REG 0x0
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#define LCDC_CTRL_REG 0x4
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#define LCDC_STAT_REG 0x8
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#define LCDC_RASTER_CTRL_REG 0x28
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#define LCDC_RASTER_TIMING_0_REG 0x2c
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#define LCDC_RASTER_TIMING_1_REG 0x30
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#define LCDC_RASTER_TIMING_2_REG 0x34
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#define LCDC_DMA_CTRL_REG 0x40
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#define LCDC_DMA_FB_BASE_ADDR_0_REG 0x44
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#define LCDC_DMA_FB_CEILING_ADDR_0_REG 0x48
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#define LCDC_DMA_FB_BASE_ADDR_1_REG 0x4c
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#define LCDC_DMA_FB_CEILING_ADDR_1_REG 0x50
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/* Interrupt Registers available only in Version 2 */
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#define LCDC_RAW_STAT_REG 0x58
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#define LCDC_MASKED_STAT_REG 0x5c
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#define LCDC_INT_ENABLE_SET_REG 0x60
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#define LCDC_INT_ENABLE_CLR_REG 0x64
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#define LCDC_END_OF_INT_IND_REG 0x68
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/* Clock registers available only on Version 2 */
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#define LCDC_CLK_ENABLE_REG 0x6c
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#define LCDC_CLK_RESET_REG 0x70
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#define LCDC_CLK_MAIN_RESET BIT(3)
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/*
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* Helpers:
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*/
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static inline void tilcdc_write(struct drm_device *dev, u32 reg, u32 data)
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{
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struct tilcdc_drm_private *priv = dev->dev_private;
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iowrite32(data, priv->mmio + reg);
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}
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static inline void tilcdc_write64(struct drm_device *dev, u32 reg, u64 data)
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{
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struct tilcdc_drm_private *priv = dev->dev_private;
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volatile void __iomem *addr = priv->mmio + reg;
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#if defined(iowrite64) && !defined(iowrite64_is_nonatomic)
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iowrite64(data, addr);
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#else
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__iowmb();
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/* This compiles to strd (=64-bit write) on ARM7 */
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*(volatile u64 __force *)addr = __cpu_to_le64(data);
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#endif
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}
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static inline u32 tilcdc_read(struct drm_device *dev, u32 reg)
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{
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struct tilcdc_drm_private *priv = dev->dev_private;
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return ioread32(priv->mmio + reg);
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}
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static inline void tilcdc_write_mask(struct drm_device *dev, u32 reg,
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u32 val, u32 mask)
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{
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tilcdc_write(dev, reg, (tilcdc_read(dev, reg) & ~mask) | (val & mask));
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}
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static inline void tilcdc_set(struct drm_device *dev, u32 reg, u32 mask)
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{
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tilcdc_write(dev, reg, tilcdc_read(dev, reg) | mask);
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}
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static inline void tilcdc_clear(struct drm_device *dev, u32 reg, u32 mask)
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{
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tilcdc_write(dev, reg, tilcdc_read(dev, reg) & ~mask);
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}
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/* the register to read/clear irqstatus differs between v1 and v2 of the IP */
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static inline u32 tilcdc_irqstatus_reg(struct drm_device *dev)
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{
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struct tilcdc_drm_private *priv = dev->dev_private;
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return (priv->rev == 2) ? LCDC_MASKED_STAT_REG : LCDC_STAT_REG;
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}
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static inline u32 tilcdc_read_irqstatus(struct drm_device *dev)
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{
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return tilcdc_read(dev, tilcdc_irqstatus_reg(dev));
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}
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static inline void tilcdc_clear_irqstatus(struct drm_device *dev, u32 mask)
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{
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tilcdc_write(dev, tilcdc_irqstatus_reg(dev), mask);
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}
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#endif /* __TILCDC_REGS_H__ */
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