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alistair23-linux/drivers/gpu/drm/exynos/exynos_drm_gsc.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2012 Samsung Electronics Co.Ltd
* Authors:
* Eunchul Kim <chulspro.kim@samsung.com>
* Jinyoung Jeon <jy0.jeon@samsung.com>
* Sangmin Lee <lsmin.lee@samsung.com>
*/
#include <linux/kernel.h>
#include <linux/component.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <drm/drmP.h>
#include <drm/exynos_drm.h>
#include "regs-gsc.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_ipp.h"
/*
* GSC stands for General SCaler and
* supports image scaler/rotator and input/output DMA operations.
* input DMA reads image data from the memory.
* output DMA writes image data to memory.
* GSC supports image rotation and image effect functions.
*/
#define GSC_MAX_CLOCKS 8
#define GSC_MAX_SRC 4
#define GSC_MAX_DST 16
#define GSC_RESET_TIMEOUT 50
#define GSC_BUF_STOP 1
#define GSC_BUF_START 2
#define GSC_REG_SZ 16
#define GSC_WIDTH_ITU_709 1280
#define GSC_SC_UP_MAX_RATIO 65536
#define GSC_SC_DOWN_RATIO_7_8 74898
#define GSC_SC_DOWN_RATIO_6_8 87381
#define GSC_SC_DOWN_RATIO_5_8 104857
#define GSC_SC_DOWN_RATIO_4_8 131072
#define GSC_SC_DOWN_RATIO_3_8 174762
#define GSC_SC_DOWN_RATIO_2_8 262144
#define GSC_CROP_MAX 8192
#define GSC_CROP_MIN 32
#define GSC_SCALE_MAX 4224
#define GSC_SCALE_MIN 32
#define GSC_COEF_RATIO 7
#define GSC_COEF_PHASE 9
#define GSC_COEF_ATTR 16
#define GSC_COEF_H_8T 8
#define GSC_COEF_V_4T 4
#define GSC_COEF_DEPTH 3
#define GSC_AUTOSUSPEND_DELAY 2000
#define get_gsc_context(dev) platform_get_drvdata(to_platform_device(dev))
#define gsc_read(offset) readl(ctx->regs + (offset))
#define gsc_write(cfg, offset) writel(cfg, ctx->regs + (offset))
/*
* A structure of scaler.
*
* @range: narrow, wide.
* @pre_shfactor: pre sclaer shift factor.
* @pre_hratio: horizontal ratio of the prescaler.
* @pre_vratio: vertical ratio of the prescaler.
* @main_hratio: the main scaler's horizontal ratio.
* @main_vratio: the main scaler's vertical ratio.
*/
struct gsc_scaler {
bool range;
u32 pre_shfactor;
u32 pre_hratio;
u32 pre_vratio;
unsigned long main_hratio;
unsigned long main_vratio;
};
/*
* A structure of gsc context.
*
* @regs_res: register resources.
* @regs: memory mapped io registers.
* @gsc_clk: gsc gate clock.
* @sc: scaler infomations.
* @id: gsc id.
* @irq: irq number.
* @rotation: supports rotation of src.
*/
struct gsc_context {
struct exynos_drm_ipp ipp;
struct drm_device *drm_dev;
struct device *dev;
struct exynos_drm_ipp_task *task;
struct exynos_drm_ipp_formats *formats;
unsigned int num_formats;
struct resource *regs_res;
void __iomem *regs;
const char **clk_names;
struct clk *clocks[GSC_MAX_CLOCKS];
int num_clocks;
struct gsc_scaler sc;
int id;
int irq;
bool rotation;
};
/**
* struct gsc_driverdata - per device type driver data for init time.
*
* @limits: picture size limits array
* @clk_names: names of clocks needed by this variant
* @num_clocks: the number of clocks needed by this variant
*/
struct gsc_driverdata {
const struct drm_exynos_ipp_limit *limits;
int num_limits;
const char *clk_names[GSC_MAX_CLOCKS];
int num_clocks;
};
/* 8-tap Filter Coefficient */
static const int h_coef_8t[GSC_COEF_RATIO][GSC_COEF_ATTR][GSC_COEF_H_8T] = {
{ /* Ratio <= 65536 (~8:8) */
{ 0, 0, 0, 128, 0, 0, 0, 0 },
{ -1, 2, -6, 127, 7, -2, 1, 0 },
{ -1, 4, -12, 125, 16, -5, 1, 0 },
{ -1, 5, -15, 120, 25, -8, 2, 0 },
{ -1, 6, -18, 114, 35, -10, 3, -1 },
{ -1, 6, -20, 107, 46, -13, 4, -1 },
{ -2, 7, -21, 99, 57, -16, 5, -1 },
{ -1, 6, -20, 89, 68, -18, 5, -1 },
{ -1, 6, -20, 79, 79, -20, 6, -1 },
{ -1, 5, -18, 68, 89, -20, 6, -1 },
{ -1, 5, -16, 57, 99, -21, 7, -2 },
{ -1, 4, -13, 46, 107, -20, 6, -1 },
{ -1, 3, -10, 35, 114, -18, 6, -1 },
{ 0, 2, -8, 25, 120, -15, 5, -1 },
{ 0, 1, -5, 16, 125, -12, 4, -1 },
{ 0, 1, -2, 7, 127, -6, 2, -1 }
}, { /* 65536 < Ratio <= 74898 (~8:7) */
{ 3, -8, 14, 111, 13, -8, 3, 0 },
{ 2, -6, 7, 112, 21, -10, 3, -1 },
{ 2, -4, 1, 110, 28, -12, 4, -1 },
{ 1, -2, -3, 106, 36, -13, 4, -1 },
{ 1, -1, -7, 103, 44, -15, 4, -1 },
{ 1, 1, -11, 97, 53, -16, 4, -1 },
{ 0, 2, -13, 91, 61, -16, 4, -1 },
{ 0, 3, -15, 85, 69, -17, 4, -1 },
{ 0, 3, -16, 77, 77, -16, 3, 0 },
{ -1, 4, -17, 69, 85, -15, 3, 0 },
{ -1, 4, -16, 61, 91, -13, 2, 0 },
{ -1, 4, -16, 53, 97, -11, 1, 1 },
{ -1, 4, -15, 44, 103, -7, -1, 1 },
{ -1, 4, -13, 36, 106, -3, -2, 1 },
{ -1, 4, -12, 28, 110, 1, -4, 2 },
{ -1, 3, -10, 21, 112, 7, -6, 2 }
}, { /* 74898 < Ratio <= 87381 (~8:6) */
{ 2, -11, 25, 96, 25, -11, 2, 0 },
{ 2, -10, 19, 96, 31, -12, 2, 0 },
{ 2, -9, 14, 94, 37, -12, 2, 0 },
{ 2, -8, 10, 92, 43, -12, 1, 0 },
{ 2, -7, 5, 90, 49, -12, 1, 0 },
{ 2, -5, 1, 86, 55, -12, 0, 1 },
{ 2, -4, -2, 82, 61, -11, -1, 1 },
{ 1, -3, -5, 77, 67, -9, -1, 1 },
{ 1, -2, -7, 72, 72, -7, -2, 1 },
{ 1, -1, -9, 67, 77, -5, -3, 1 },
{ 1, -1, -11, 61, 82, -2, -4, 2 },
{ 1, 0, -12, 55, 86, 1, -5, 2 },
{ 0, 1, -12, 49, 90, 5, -7, 2 },
{ 0, 1, -12, 43, 92, 10, -8, 2 },
{ 0, 2, -12, 37, 94, 14, -9, 2 },
{ 0, 2, -12, 31, 96, 19, -10, 2 }
}, { /* 87381 < Ratio <= 104857 (~8:5) */
{ -1, -8, 33, 80, 33, -8, -1, 0 },
{ -1, -8, 28, 80, 37, -7, -2, 1 },
{ 0, -8, 24, 79, 41, -7, -2, 1 },
{ 0, -8, 20, 78, 46, -6, -3, 1 },
{ 0, -8, 16, 76, 50, -4, -3, 1 },
{ 0, -7, 13, 74, 54, -3, -4, 1 },
{ 1, -7, 10, 71, 58, -1, -5, 1 },
{ 1, -6, 6, 68, 62, 1, -5, 1 },
{ 1, -6, 4, 65, 65, 4, -6, 1 },
{ 1, -5, 1, 62, 68, 6, -6, 1 },
{ 1, -5, -1, 58, 71, 10, -7, 1 },
{ 1, -4, -3, 54, 74, 13, -7, 0 },
{ 1, -3, -4, 50, 76, 16, -8, 0 },
{ 1, -3, -6, 46, 78, 20, -8, 0 },
{ 1, -2, -7, 41, 79, 24, -8, 0 },
{ 1, -2, -7, 37, 80, 28, -8, -1 }
}, { /* 104857 < Ratio <= 131072 (~8:4) */
{ -3, 0, 35, 64, 35, 0, -3, 0 },
{ -3, -1, 32, 64, 38, 1, -3, 0 },
{ -2, -2, 29, 63, 41, 2, -3, 0 },
{ -2, -3, 27, 63, 43, 4, -4, 0 },
{ -2, -3, 24, 61, 46, 6, -4, 0 },
{ -2, -3, 21, 60, 49, 7, -4, 0 },
{ -1, -4, 19, 59, 51, 9, -4, -1 },
{ -1, -4, 16, 57, 53, 12, -4, -1 },
{ -1, -4, 14, 55, 55, 14, -4, -1 },
{ -1, -4, 12, 53, 57, 16, -4, -1 },
{ -1, -4, 9, 51, 59, 19, -4, -1 },
{ 0, -4, 7, 49, 60, 21, -3, -2 },
{ 0, -4, 6, 46, 61, 24, -3, -2 },
{ 0, -4, 4, 43, 63, 27, -3, -2 },
{ 0, -3, 2, 41, 63, 29, -2, -2 },
{ 0, -3, 1, 38, 64, 32, -1, -3 }
}, { /* 131072 < Ratio <= 174762 (~8:3) */
{ -1, 8, 33, 48, 33, 8, -1, 0 },
{ -1, 7, 31, 49, 35, 9, -1, -1 },
{ -1, 6, 30, 49, 36, 10, -1, -1 },
{ -1, 5, 28, 48, 38, 12, -1, -1 },
{ -1, 4, 26, 48, 39, 13, 0, -1 },
{ -1, 3, 24, 47, 41, 15, 0, -1 },
{ -1, 2, 23, 47, 42, 16, 0, -1 },
{ -1, 2, 21, 45, 43, 18, 1, -1 },
{ -1, 1, 19, 45, 45, 19, 1, -1 },
{ -1, 1, 18, 43, 45, 21, 2, -1 },
{ -1, 0, 16, 42, 47, 23, 2, -1 },
{ -1, 0, 15, 41, 47, 24, 3, -1 },
{ -1, 0, 13, 39, 48, 26, 4, -1 },
{ -1, -1, 12, 38, 48, 28, 5, -1 },
{ -1, -1, 10, 36, 49, 30, 6, -1 },
{ -1, -1, 9, 35, 49, 31, 7, -1 }
}, { /* 174762 < Ratio <= 262144 (~8:2) */
{ 2, 13, 30, 38, 30, 13, 2, 0 },
{ 2, 12, 29, 38, 30, 14, 3, 0 },
{ 2, 11, 28, 38, 31, 15, 3, 0 },
{ 2, 10, 26, 38, 32, 16, 4, 0 },
{ 1, 10, 26, 37, 33, 17, 4, 0 },
{ 1, 9, 24, 37, 34, 18, 5, 0 },
{ 1, 8, 24, 37, 34, 19, 5, 0 },
{ 1, 7, 22, 36, 35, 20, 6, 1 },
{ 1, 6, 21, 36, 36, 21, 6, 1 },
{ 1, 6, 20, 35, 36, 22, 7, 1 },
{ 0, 5, 19, 34, 37, 24, 8, 1 },
{ 0, 5, 18, 34, 37, 24, 9, 1 },
{ 0, 4, 17, 33, 37, 26, 10, 1 },
{ 0, 4, 16, 32, 38, 26, 10, 2 },
{ 0, 3, 15, 31, 38, 28, 11, 2 },
{ 0, 3, 14, 30, 38, 29, 12, 2 }
}
};
/* 4-tap Filter Coefficient */
static const int v_coef_4t[GSC_COEF_RATIO][GSC_COEF_ATTR][GSC_COEF_V_4T] = {
{ /* Ratio <= 65536 (~8:8) */
{ 0, 128, 0, 0 },
{ -4, 127, 5, 0 },
{ -6, 124, 11, -1 },
{ -8, 118, 19, -1 },
{ -8, 111, 27, -2 },
{ -8, 102, 37, -3 },
{ -8, 92, 48, -4 },
{ -7, 81, 59, -5 },
{ -6, 70, 70, -6 },
{ -5, 59, 81, -7 },
{ -4, 48, 92, -8 },
{ -3, 37, 102, -8 },
{ -2, 27, 111, -8 },
{ -1, 19, 118, -8 },
{ -1, 11, 124, -6 },
{ 0, 5, 127, -4 }
}, { /* 65536 < Ratio <= 74898 (~8:7) */
{ 8, 112, 8, 0 },
{ 4, 111, 14, -1 },
{ 1, 109, 20, -2 },
{ -2, 105, 27, -2 },
{ -3, 100, 34, -3 },
{ -5, 93, 43, -3 },
{ -5, 86, 51, -4 },
{ -5, 77, 60, -4 },
{ -5, 69, 69, -5 },
{ -4, 60, 77, -5 },
{ -4, 51, 86, -5 },
{ -3, 43, 93, -5 },
{ -3, 34, 100, -3 },
{ -2, 27, 105, -2 },
{ -2, 20, 109, 1 },
{ -1, 14, 111, 4 }
}, { /* 74898 < Ratio <= 87381 (~8:6) */
{ 16, 96, 16, 0 },
{ 12, 97, 21, -2 },
{ 8, 96, 26, -2 },
{ 5, 93, 32, -2 },
{ 2, 89, 39, -2 },
{ 0, 84, 46, -2 },
{ -1, 79, 53, -3 },
{ -2, 73, 59, -2 },
{ -2, 66, 66, -2 },
{ -2, 59, 73, -2 },
{ -3, 53, 79, -1 },
{ -2, 46, 84, 0 },
{ -2, 39, 89, 2 },
{ -2, 32, 93, 5 },
{ -2, 26, 96, 8 },
{ -2, 21, 97, 12 }
}, { /* 87381 < Ratio <= 104857 (~8:5) */
{ 22, 84, 22, 0 },
{ 18, 85, 26, -1 },
{ 14, 84, 31, -1 },
{ 11, 82, 36, -1 },
{ 8, 79, 42, -1 },
{ 6, 76, 47, -1 },
{ 4, 72, 52, 0 },
{ 2, 68, 58, 0 },
{ 1, 63, 63, 1 },
{ 0, 58, 68, 2 },
{ 0, 52, 72, 4 },
{ -1, 47, 76, 6 },
{ -1, 42, 79, 8 },
{ -1, 36, 82, 11 },
{ -1, 31, 84, 14 },
{ -1, 26, 85, 18 }
}, { /* 104857 < Ratio <= 131072 (~8:4) */
{ 26, 76, 26, 0 },
{ 22, 76, 30, 0 },
{ 19, 75, 34, 0 },
{ 16, 73, 38, 1 },
{ 13, 71, 43, 1 },
{ 10, 69, 47, 2 },
{ 8, 66, 51, 3 },
{ 6, 63, 55, 4 },
{ 5, 59, 59, 5 },
{ 4, 55, 63, 6 },
{ 3, 51, 66, 8 },
{ 2, 47, 69, 10 },
{ 1, 43, 71, 13 },
{ 1, 38, 73, 16 },
{ 0, 34, 75, 19 },
{ 0, 30, 76, 22 }
}, { /* 131072 < Ratio <= 174762 (~8:3) */
{ 29, 70, 29, 0 },
{ 26, 68, 32, 2 },
{ 23, 67, 36, 2 },
{ 20, 66, 39, 3 },
{ 17, 65, 43, 3 },
{ 15, 63, 46, 4 },
{ 12, 61, 50, 5 },
{ 10, 58, 53, 7 },
{ 8, 56, 56, 8 },
{ 7, 53, 58, 10 },
{ 5, 50, 61, 12 },
{ 4, 46, 63, 15 },
{ 3, 43, 65, 17 },
{ 3, 39, 66, 20 },
{ 2, 36, 67, 23 },
{ 2, 32, 68, 26 }
}, { /* 174762 < Ratio <= 262144 (~8:2) */
{ 32, 64, 32, 0 },
{ 28, 63, 34, 3 },
{ 25, 62, 37, 4 },
{ 22, 62, 40, 4 },
{ 19, 61, 43, 5 },
{ 17, 59, 46, 6 },
{ 15, 58, 48, 7 },
{ 13, 55, 51, 9 },
{ 11, 53, 53, 11 },
{ 9, 51, 55, 13 },
{ 7, 48, 58, 15 },
{ 6, 46, 59, 17 },
{ 5, 43, 61, 19 },
{ 4, 40, 62, 22 },
{ 4, 37, 62, 25 },
{ 3, 34, 63, 28 }
}
};
static int gsc_sw_reset(struct gsc_context *ctx)
{
u32 cfg;
int count = GSC_RESET_TIMEOUT;
/* s/w reset */
cfg = (GSC_SW_RESET_SRESET);
gsc_write(cfg, GSC_SW_RESET);
/* wait s/w reset complete */
while (count--) {
cfg = gsc_read(GSC_SW_RESET);
if (!cfg)
break;
usleep_range(1000, 2000);
}
if (cfg) {
DRM_DEV_ERROR(ctx->dev, "failed to reset gsc h/w.\n");
return -EBUSY;
}
/* reset sequence */
cfg = gsc_read(GSC_IN_BASE_ADDR_Y_MASK);
cfg |= (GSC_IN_BASE_ADDR_MASK |
GSC_IN_BASE_ADDR_PINGPONG(0));
gsc_write(cfg, GSC_IN_BASE_ADDR_Y_MASK);
gsc_write(cfg, GSC_IN_BASE_ADDR_CB_MASK);
gsc_write(cfg, GSC_IN_BASE_ADDR_CR_MASK);
cfg = gsc_read(GSC_OUT_BASE_ADDR_Y_MASK);
cfg |= (GSC_OUT_BASE_ADDR_MASK |
GSC_OUT_BASE_ADDR_PINGPONG(0));
gsc_write(cfg, GSC_OUT_BASE_ADDR_Y_MASK);
gsc_write(cfg, GSC_OUT_BASE_ADDR_CB_MASK);
gsc_write(cfg, GSC_OUT_BASE_ADDR_CR_MASK);
return 0;
}
static void gsc_handle_irq(struct gsc_context *ctx, bool enable,
bool overflow, bool done)
{
u32 cfg;
DRM_DEV_DEBUG_KMS(ctx->dev, "enable[%d]overflow[%d]level[%d]\n",
enable, overflow, done);
cfg = gsc_read(GSC_IRQ);
cfg |= (GSC_IRQ_OR_MASK | GSC_IRQ_FRMDONE_MASK);
if (enable)
cfg |= GSC_IRQ_ENABLE;
else
cfg &= ~GSC_IRQ_ENABLE;
if (overflow)
cfg &= ~GSC_IRQ_OR_MASK;
else
cfg |= GSC_IRQ_OR_MASK;
if (done)
cfg &= ~GSC_IRQ_FRMDONE_MASK;
else
cfg |= GSC_IRQ_FRMDONE_MASK;
gsc_write(cfg, GSC_IRQ);
}
static void gsc_src_set_fmt(struct gsc_context *ctx, u32 fmt, bool tiled)
{
u32 cfg;
DRM_DEV_DEBUG_KMS(ctx->dev, "fmt[0x%x]\n", fmt);
cfg = gsc_read(GSC_IN_CON);
cfg &= ~(GSC_IN_RGB_TYPE_MASK | GSC_IN_YUV422_1P_ORDER_MASK |
GSC_IN_CHROMA_ORDER_MASK | GSC_IN_FORMAT_MASK |
GSC_IN_TILE_TYPE_MASK | GSC_IN_TILE_MODE |
GSC_IN_CHROM_STRIDE_SEL_MASK | GSC_IN_RB_SWAP_MASK);
switch (fmt) {
case DRM_FORMAT_RGB565:
cfg |= GSC_IN_RGB565;
break;
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
cfg |= GSC_IN_XRGB8888;
break;
case DRM_FORMAT_BGRX8888:
cfg |= (GSC_IN_XRGB8888 | GSC_IN_RB_SWAP);
break;
case DRM_FORMAT_YUYV:
cfg |= (GSC_IN_YUV422_1P |
GSC_IN_YUV422_1P_ORDER_LSB_Y |
GSC_IN_CHROMA_ORDER_CBCR);
break;
case DRM_FORMAT_YVYU:
cfg |= (GSC_IN_YUV422_1P |
GSC_IN_YUV422_1P_ORDER_LSB_Y |
GSC_IN_CHROMA_ORDER_CRCB);
break;
case DRM_FORMAT_UYVY:
cfg |= (GSC_IN_YUV422_1P |
GSC_IN_YUV422_1P_OEDER_LSB_C |
GSC_IN_CHROMA_ORDER_CBCR);
break;
case DRM_FORMAT_VYUY:
cfg |= (GSC_IN_YUV422_1P |
GSC_IN_YUV422_1P_OEDER_LSB_C |
GSC_IN_CHROMA_ORDER_CRCB);
break;
case DRM_FORMAT_NV21:
cfg |= (GSC_IN_CHROMA_ORDER_CRCB | GSC_IN_YUV420_2P);
break;
case DRM_FORMAT_NV61:
cfg |= (GSC_IN_CHROMA_ORDER_CRCB | GSC_IN_YUV422_2P);
break;
case DRM_FORMAT_YUV422:
cfg |= GSC_IN_YUV422_3P;
break;
case DRM_FORMAT_YUV420:
cfg |= (GSC_IN_CHROMA_ORDER_CBCR | GSC_IN_YUV420_3P);
break;
case DRM_FORMAT_YVU420:
cfg |= (GSC_IN_CHROMA_ORDER_CRCB | GSC_IN_YUV420_3P);
break;
case DRM_FORMAT_NV12:
cfg |= (GSC_IN_CHROMA_ORDER_CBCR | GSC_IN_YUV420_2P);
break;
case DRM_FORMAT_NV16:
cfg |= (GSC_IN_CHROMA_ORDER_CBCR | GSC_IN_YUV422_2P);
break;
}
if (tiled)
cfg |= (GSC_IN_TILE_C_16x8 | GSC_IN_TILE_MODE);
gsc_write(cfg, GSC_IN_CON);
}
static void gsc_src_set_transf(struct gsc_context *ctx, unsigned int rotation)
{
unsigned int degree = rotation & DRM_MODE_ROTATE_MASK;
u32 cfg;
cfg = gsc_read(GSC_IN_CON);
cfg &= ~GSC_IN_ROT_MASK;
switch (degree) {
case DRM_MODE_ROTATE_0:
if (rotation & DRM_MODE_REFLECT_X)
cfg |= GSC_IN_ROT_XFLIP;
if (rotation & DRM_MODE_REFLECT_Y)
cfg |= GSC_IN_ROT_YFLIP;
break;
case DRM_MODE_ROTATE_90:
cfg |= GSC_IN_ROT_90;
if (rotation & DRM_MODE_REFLECT_X)
cfg |= GSC_IN_ROT_XFLIP;
if (rotation & DRM_MODE_REFLECT_Y)
cfg |= GSC_IN_ROT_YFLIP;
break;
case DRM_MODE_ROTATE_180:
cfg |= GSC_IN_ROT_180;
if (rotation & DRM_MODE_REFLECT_X)
cfg &= ~GSC_IN_ROT_XFLIP;
if (rotation & DRM_MODE_REFLECT_Y)
cfg &= ~GSC_IN_ROT_YFLIP;
break;
case DRM_MODE_ROTATE_270:
cfg |= GSC_IN_ROT_270;
if (rotation & DRM_MODE_REFLECT_X)
cfg &= ~GSC_IN_ROT_XFLIP;
if (rotation & DRM_MODE_REFLECT_Y)
cfg &= ~GSC_IN_ROT_YFLIP;
break;
}
gsc_write(cfg, GSC_IN_CON);
ctx->rotation = (cfg & GSC_IN_ROT_90) ? 1 : 0;
}
static void gsc_src_set_size(struct gsc_context *ctx,
struct exynos_drm_ipp_buffer *buf)
{
struct gsc_scaler *sc = &ctx->sc;
u32 cfg;
/* pixel offset */
cfg = (GSC_SRCIMG_OFFSET_X(buf->rect.x) |
GSC_SRCIMG_OFFSET_Y(buf->rect.y));
gsc_write(cfg, GSC_SRCIMG_OFFSET);
/* cropped size */
cfg = (GSC_CROPPED_WIDTH(buf->rect.w) |
GSC_CROPPED_HEIGHT(buf->rect.h));
gsc_write(cfg, GSC_CROPPED_SIZE);
/* original size */
cfg = gsc_read(GSC_SRCIMG_SIZE);
cfg &= ~(GSC_SRCIMG_HEIGHT_MASK |
GSC_SRCIMG_WIDTH_MASK);
cfg |= (GSC_SRCIMG_WIDTH(buf->buf.pitch[0] / buf->format->cpp[0]) |
GSC_SRCIMG_HEIGHT(buf->buf.height));
gsc_write(cfg, GSC_SRCIMG_SIZE);
cfg = gsc_read(GSC_IN_CON);
cfg &= ~GSC_IN_RGB_TYPE_MASK;
if (buf->rect.w >= GSC_WIDTH_ITU_709)
if (sc->range)
cfg |= GSC_IN_RGB_HD_WIDE;
else
cfg |= GSC_IN_RGB_HD_NARROW;
else
if (sc->range)
cfg |= GSC_IN_RGB_SD_WIDE;
else
cfg |= GSC_IN_RGB_SD_NARROW;
gsc_write(cfg, GSC_IN_CON);
}
static void gsc_src_set_buf_seq(struct gsc_context *ctx, u32 buf_id,
bool enqueue)
{
bool masked = !enqueue;
u32 cfg;
u32 mask = 0x00000001 << buf_id;
/* mask register set */
cfg = gsc_read(GSC_IN_BASE_ADDR_Y_MASK);
/* sequence id */
cfg &= ~mask;
cfg |= masked << buf_id;
gsc_write(cfg, GSC_IN_BASE_ADDR_Y_MASK);
gsc_write(cfg, GSC_IN_BASE_ADDR_CB_MASK);
gsc_write(cfg, GSC_IN_BASE_ADDR_CR_MASK);
}
static void gsc_src_set_addr(struct gsc_context *ctx, u32 buf_id,
struct exynos_drm_ipp_buffer *buf)
{
/* address register set */
gsc_write(buf->dma_addr[0], GSC_IN_BASE_ADDR_Y(buf_id));
gsc_write(buf->dma_addr[1], GSC_IN_BASE_ADDR_CB(buf_id));
gsc_write(buf->dma_addr[2], GSC_IN_BASE_ADDR_CR(buf_id));
gsc_src_set_buf_seq(ctx, buf_id, true);
}
static void gsc_dst_set_fmt(struct gsc_context *ctx, u32 fmt, bool tiled)
{
u32 cfg;
DRM_DEV_DEBUG_KMS(ctx->dev, "fmt[0x%x]\n", fmt);
cfg = gsc_read(GSC_OUT_CON);
cfg &= ~(GSC_OUT_RGB_TYPE_MASK | GSC_OUT_YUV422_1P_ORDER_MASK |
GSC_OUT_CHROMA_ORDER_MASK | GSC_OUT_FORMAT_MASK |
GSC_OUT_CHROM_STRIDE_SEL_MASK | GSC_OUT_RB_SWAP_MASK |
GSC_OUT_GLOBAL_ALPHA_MASK);
switch (fmt) {
case DRM_FORMAT_RGB565:
cfg |= GSC_OUT_RGB565;
break;
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_XRGB8888:
cfg |= (GSC_OUT_XRGB8888 | GSC_OUT_GLOBAL_ALPHA(0xff));
break;
case DRM_FORMAT_BGRX8888:
cfg |= (GSC_OUT_XRGB8888 | GSC_OUT_RB_SWAP);
break;
case DRM_FORMAT_YUYV:
cfg |= (GSC_OUT_YUV422_1P |
GSC_OUT_YUV422_1P_ORDER_LSB_Y |
GSC_OUT_CHROMA_ORDER_CBCR);
break;
case DRM_FORMAT_YVYU:
cfg |= (GSC_OUT_YUV422_1P |
GSC_OUT_YUV422_1P_ORDER_LSB_Y |
GSC_OUT_CHROMA_ORDER_CRCB);
break;
case DRM_FORMAT_UYVY:
cfg |= (GSC_OUT_YUV422_1P |
GSC_OUT_YUV422_1P_OEDER_LSB_C |
GSC_OUT_CHROMA_ORDER_CBCR);
break;
case DRM_FORMAT_VYUY:
cfg |= (GSC_OUT_YUV422_1P |
GSC_OUT_YUV422_1P_OEDER_LSB_C |
GSC_OUT_CHROMA_ORDER_CRCB);
break;
case DRM_FORMAT_NV21:
cfg |= (GSC_OUT_CHROMA_ORDER_CRCB | GSC_OUT_YUV420_2P);
break;
case DRM_FORMAT_NV61:
cfg |= (GSC_OUT_CHROMA_ORDER_CRCB | GSC_OUT_YUV422_2P);
break;
case DRM_FORMAT_YUV422:
cfg |= GSC_OUT_YUV422_3P;
break;
case DRM_FORMAT_YUV420:
cfg |= (GSC_OUT_CHROMA_ORDER_CBCR | GSC_OUT_YUV420_3P);
break;
case DRM_FORMAT_YVU420:
cfg |= (GSC_OUT_CHROMA_ORDER_CRCB | GSC_OUT_YUV420_3P);
break;
case DRM_FORMAT_NV12:
cfg |= (GSC_OUT_CHROMA_ORDER_CBCR | GSC_OUT_YUV420_2P);
break;
case DRM_FORMAT_NV16:
cfg |= (GSC_OUT_CHROMA_ORDER_CBCR | GSC_OUT_YUV422_2P);
break;
}
if (tiled)
cfg |= (GSC_IN_TILE_C_16x8 | GSC_OUT_TILE_MODE);
gsc_write(cfg, GSC_OUT_CON);
}
static int gsc_get_ratio_shift(struct gsc_context *ctx, u32 src, u32 dst,
u32 *ratio)
{
DRM_DEV_DEBUG_KMS(ctx->dev, "src[%d]dst[%d]\n", src, dst);
if (src >= dst * 8) {
DRM_DEV_ERROR(ctx->dev, "failed to make ratio and shift.\n");
return -EINVAL;
} else if (src >= dst * 4)
*ratio = 4;
else if (src >= dst * 2)
*ratio = 2;
else
*ratio = 1;
return 0;
}
static void gsc_get_prescaler_shfactor(u32 hratio, u32 vratio, u32 *shfactor)
{
if (hratio == 4 && vratio == 4)
*shfactor = 4;
else if ((hratio == 4 && vratio == 2) ||
(hratio == 2 && vratio == 4))
*shfactor = 3;
else if ((hratio == 4 && vratio == 1) ||
(hratio == 1 && vratio == 4) ||
(hratio == 2 && vratio == 2))
*shfactor = 2;
else if (hratio == 1 && vratio == 1)
*shfactor = 0;
else
*shfactor = 1;
}
static int gsc_set_prescaler(struct gsc_context *ctx, struct gsc_scaler *sc,
struct drm_exynos_ipp_task_rect *src,
struct drm_exynos_ipp_task_rect *dst)
{
u32 cfg;
u32 src_w, src_h, dst_w, dst_h;
int ret = 0;
src_w = src->w;
src_h = src->h;
if (ctx->rotation) {
dst_w = dst->h;
dst_h = dst->w;
} else {
dst_w = dst->w;
dst_h = dst->h;
}
ret = gsc_get_ratio_shift(ctx, src_w, dst_w, &sc->pre_hratio);
if (ret) {
DRM_DEV_ERROR(ctx->dev, "failed to get ratio horizontal.\n");
return ret;
}
ret = gsc_get_ratio_shift(ctx, src_h, dst_h, &sc->pre_vratio);
if (ret) {
DRM_DEV_ERROR(ctx->dev, "failed to get ratio vertical.\n");
return ret;
}
DRM_DEV_DEBUG_KMS(ctx->dev, "pre_hratio[%d]pre_vratio[%d]\n",
sc->pre_hratio, sc->pre_vratio);
sc->main_hratio = (src_w << 16) / dst_w;
sc->main_vratio = (src_h << 16) / dst_h;
DRM_DEV_DEBUG_KMS(ctx->dev, "main_hratio[%ld]main_vratio[%ld]\n",
sc->main_hratio, sc->main_vratio);
gsc_get_prescaler_shfactor(sc->pre_hratio, sc->pre_vratio,
&sc->pre_shfactor);
DRM_DEV_DEBUG_KMS(ctx->dev, "pre_shfactor[%d]\n", sc->pre_shfactor);
cfg = (GSC_PRESC_SHFACTOR(sc->pre_shfactor) |
GSC_PRESC_H_RATIO(sc->pre_hratio) |
GSC_PRESC_V_RATIO(sc->pre_vratio));
gsc_write(cfg, GSC_PRE_SCALE_RATIO);
return ret;
}
static void gsc_set_h_coef(struct gsc_context *ctx, unsigned long main_hratio)
{
int i, j, k, sc_ratio;
if (main_hratio <= GSC_SC_UP_MAX_RATIO)
sc_ratio = 0;
else if (main_hratio <= GSC_SC_DOWN_RATIO_7_8)
sc_ratio = 1;
else if (main_hratio <= GSC_SC_DOWN_RATIO_6_8)
sc_ratio = 2;
else if (main_hratio <= GSC_SC_DOWN_RATIO_5_8)
sc_ratio = 3;
else if (main_hratio <= GSC_SC_DOWN_RATIO_4_8)
sc_ratio = 4;
else if (main_hratio <= GSC_SC_DOWN_RATIO_3_8)
sc_ratio = 5;
else
sc_ratio = 6;
for (i = 0; i < GSC_COEF_PHASE; i++)
for (j = 0; j < GSC_COEF_H_8T; j++)
for (k = 0; k < GSC_COEF_DEPTH; k++)
gsc_write(h_coef_8t[sc_ratio][i][j],
GSC_HCOEF(i, j, k));
}
static void gsc_set_v_coef(struct gsc_context *ctx, unsigned long main_vratio)
{
int i, j, k, sc_ratio;
if (main_vratio <= GSC_SC_UP_MAX_RATIO)
sc_ratio = 0;
else if (main_vratio <= GSC_SC_DOWN_RATIO_7_8)
sc_ratio = 1;
else if (main_vratio <= GSC_SC_DOWN_RATIO_6_8)
sc_ratio = 2;
else if (main_vratio <= GSC_SC_DOWN_RATIO_5_8)
sc_ratio = 3;
else if (main_vratio <= GSC_SC_DOWN_RATIO_4_8)
sc_ratio = 4;
else if (main_vratio <= GSC_SC_DOWN_RATIO_3_8)
sc_ratio = 5;
else
sc_ratio = 6;
for (i = 0; i < GSC_COEF_PHASE; i++)
for (j = 0; j < GSC_COEF_V_4T; j++)
for (k = 0; k < GSC_COEF_DEPTH; k++)
gsc_write(v_coef_4t[sc_ratio][i][j],
GSC_VCOEF(i, j, k));
}
static void gsc_set_scaler(struct gsc_context *ctx, struct gsc_scaler *sc)
{
u32 cfg;
DRM_DEV_DEBUG_KMS(ctx->dev, "main_hratio[%ld]main_vratio[%ld]\n",
sc->main_hratio, sc->main_vratio);
gsc_set_h_coef(ctx, sc->main_hratio);
cfg = GSC_MAIN_H_RATIO_VALUE(sc->main_hratio);
gsc_write(cfg, GSC_MAIN_H_RATIO);
gsc_set_v_coef(ctx, sc->main_vratio);
cfg = GSC_MAIN_V_RATIO_VALUE(sc->main_vratio);
gsc_write(cfg, GSC_MAIN_V_RATIO);
}
static void gsc_dst_set_size(struct gsc_context *ctx,
struct exynos_drm_ipp_buffer *buf)
{
struct gsc_scaler *sc = &ctx->sc;
u32 cfg;
/* pixel offset */
cfg = (GSC_DSTIMG_OFFSET_X(buf->rect.x) |
GSC_DSTIMG_OFFSET_Y(buf->rect.y));
gsc_write(cfg, GSC_DSTIMG_OFFSET);
/* scaled size */
if (ctx->rotation)
cfg = (GSC_SCALED_WIDTH(buf->rect.h) |
GSC_SCALED_HEIGHT(buf->rect.w));
else
cfg = (GSC_SCALED_WIDTH(buf->rect.w) |
GSC_SCALED_HEIGHT(buf->rect.h));
gsc_write(cfg, GSC_SCALED_SIZE);
/* original size */
cfg = gsc_read(GSC_DSTIMG_SIZE);
cfg &= ~(GSC_DSTIMG_HEIGHT_MASK | GSC_DSTIMG_WIDTH_MASK);
cfg |= GSC_DSTIMG_WIDTH(buf->buf.pitch[0] / buf->format->cpp[0]) |
GSC_DSTIMG_HEIGHT(buf->buf.height);
gsc_write(cfg, GSC_DSTIMG_SIZE);
cfg = gsc_read(GSC_OUT_CON);
cfg &= ~GSC_OUT_RGB_TYPE_MASK;
if (buf->rect.w >= GSC_WIDTH_ITU_709)
if (sc->range)
cfg |= GSC_OUT_RGB_HD_WIDE;
else
cfg |= GSC_OUT_RGB_HD_NARROW;
else
if (sc->range)
cfg |= GSC_OUT_RGB_SD_WIDE;
else
cfg |= GSC_OUT_RGB_SD_NARROW;
gsc_write(cfg, GSC_OUT_CON);
}
static int gsc_dst_get_buf_seq(struct gsc_context *ctx)
{
u32 cfg, i, buf_num = GSC_REG_SZ;
u32 mask = 0x00000001;
cfg = gsc_read(GSC_OUT_BASE_ADDR_Y_MASK);
for (i = 0; i < GSC_REG_SZ; i++)
if (cfg & (mask << i))
buf_num--;
DRM_DEV_DEBUG_KMS(ctx->dev, "buf_num[%d]\n", buf_num);
return buf_num;
}
static void gsc_dst_set_buf_seq(struct gsc_context *ctx, u32 buf_id,
bool enqueue)
{
bool masked = !enqueue;
u32 cfg;
u32 mask = 0x00000001 << buf_id;
/* mask register set */
cfg = gsc_read(GSC_OUT_BASE_ADDR_Y_MASK);
/* sequence id */
cfg &= ~mask;
cfg |= masked << buf_id;
gsc_write(cfg, GSC_OUT_BASE_ADDR_Y_MASK);
gsc_write(cfg, GSC_OUT_BASE_ADDR_CB_MASK);
gsc_write(cfg, GSC_OUT_BASE_ADDR_CR_MASK);
/* interrupt enable */
if (enqueue && gsc_dst_get_buf_seq(ctx) >= GSC_BUF_START)
gsc_handle_irq(ctx, true, false, true);
/* interrupt disable */
if (!enqueue && gsc_dst_get_buf_seq(ctx) <= GSC_BUF_STOP)
gsc_handle_irq(ctx, false, false, true);
}
static void gsc_dst_set_addr(struct gsc_context *ctx,
u32 buf_id, struct exynos_drm_ipp_buffer *buf)
{
/* address register set */
gsc_write(buf->dma_addr[0], GSC_OUT_BASE_ADDR_Y(buf_id));
gsc_write(buf->dma_addr[1], GSC_OUT_BASE_ADDR_CB(buf_id));
gsc_write(buf->dma_addr[2], GSC_OUT_BASE_ADDR_CR(buf_id));
gsc_dst_set_buf_seq(ctx, buf_id, true);
}
static int gsc_get_src_buf_index(struct gsc_context *ctx)
{
u32 cfg, curr_index, i;
u32 buf_id = GSC_MAX_SRC;
DRM_DEV_DEBUG_KMS(ctx->dev, "gsc id[%d]\n", ctx->id);
cfg = gsc_read(GSC_IN_BASE_ADDR_Y_MASK);
curr_index = GSC_IN_CURR_GET_INDEX(cfg);
for (i = curr_index; i < GSC_MAX_SRC; i++) {
if (!((cfg >> i) & 0x1)) {
buf_id = i;
break;
}
}
DRM_DEV_DEBUG_KMS(ctx->dev, "cfg[0x%x]curr_index[%d]buf_id[%d]\n", cfg,
curr_index, buf_id);
if (buf_id == GSC_MAX_SRC) {
DRM_DEV_ERROR(ctx->dev, "failed to get in buffer index.\n");
return -EINVAL;
}
gsc_src_set_buf_seq(ctx, buf_id, false);
return buf_id;
}
static int gsc_get_dst_buf_index(struct gsc_context *ctx)
{
u32 cfg, curr_index, i;
u32 buf_id = GSC_MAX_DST;
DRM_DEV_DEBUG_KMS(ctx->dev, "gsc id[%d]\n", ctx->id);
cfg = gsc_read(GSC_OUT_BASE_ADDR_Y_MASK);
curr_index = GSC_OUT_CURR_GET_INDEX(cfg);
for (i = curr_index; i < GSC_MAX_DST; i++) {
if (!((cfg >> i) & 0x1)) {
buf_id = i;
break;
}
}
if (buf_id == GSC_MAX_DST) {
DRM_DEV_ERROR(ctx->dev, "failed to get out buffer index.\n");
return -EINVAL;
}
gsc_dst_set_buf_seq(ctx, buf_id, false);
DRM_DEV_DEBUG_KMS(ctx->dev, "cfg[0x%x]curr_index[%d]buf_id[%d]\n", cfg,
curr_index, buf_id);
return buf_id;
}
static irqreturn_t gsc_irq_handler(int irq, void *dev_id)
{
struct gsc_context *ctx = dev_id;
u32 status;
int err = 0;
DRM_DEV_DEBUG_KMS(ctx->dev, "gsc id[%d]\n", ctx->id);
status = gsc_read(GSC_IRQ);
if (status & GSC_IRQ_STATUS_OR_IRQ) {
dev_err(ctx->dev, "occurred overflow at %d, status 0x%x.\n",
ctx->id, status);
err = -EINVAL;
}
if (status & GSC_IRQ_STATUS_OR_FRM_DONE) {
int src_buf_id, dst_buf_id;
dev_dbg(ctx->dev, "occurred frame done at %d, status 0x%x.\n",
ctx->id, status);
src_buf_id = gsc_get_src_buf_index(ctx);
dst_buf_id = gsc_get_dst_buf_index(ctx);
DRM_DEV_DEBUG_KMS(ctx->dev, "buf_id_src[%d]buf_id_dst[%d]\n",
src_buf_id, dst_buf_id);
if (src_buf_id < 0 || dst_buf_id < 0)
err = -EINVAL;
}
if (ctx->task) {
struct exynos_drm_ipp_task *task = ctx->task;
ctx->task = NULL;
pm_runtime_mark_last_busy(ctx->dev);
pm_runtime_put_autosuspend(ctx->dev);
exynos_drm_ipp_task_done(task, err);
}
return IRQ_HANDLED;
}
static int gsc_reset(struct gsc_context *ctx)
{
struct gsc_scaler *sc = &ctx->sc;
int ret;
/* reset h/w block */
ret = gsc_sw_reset(ctx);
if (ret < 0) {
dev_err(ctx->dev, "failed to reset hardware.\n");
return ret;
}
/* scaler setting */
memset(&ctx->sc, 0x0, sizeof(ctx->sc));
sc->range = true;
return 0;
}
static void gsc_start(struct gsc_context *ctx)
{
u32 cfg;
gsc_handle_irq(ctx, true, false, true);
/* enable one shot */
cfg = gsc_read(GSC_ENABLE);
cfg &= ~(GSC_ENABLE_ON_CLEAR_MASK |
GSC_ENABLE_CLK_GATE_MODE_MASK);
cfg |= GSC_ENABLE_ON_CLEAR_ONESHOT;
gsc_write(cfg, GSC_ENABLE);
/* src dma memory */
cfg = gsc_read(GSC_IN_CON);
cfg &= ~(GSC_IN_PATH_MASK | GSC_IN_LOCAL_SEL_MASK);
cfg |= GSC_IN_PATH_MEMORY;
gsc_write(cfg, GSC_IN_CON);
/* dst dma memory */
cfg = gsc_read(GSC_OUT_CON);
cfg |= GSC_OUT_PATH_MEMORY;
gsc_write(cfg, GSC_OUT_CON);
gsc_set_scaler(ctx, &ctx->sc);
cfg = gsc_read(GSC_ENABLE);
cfg |= GSC_ENABLE_ON;
gsc_write(cfg, GSC_ENABLE);
}
static int gsc_commit(struct exynos_drm_ipp *ipp,
struct exynos_drm_ipp_task *task)
{
struct gsc_context *ctx = container_of(ipp, struct gsc_context, ipp);
int ret;
pm_runtime_get_sync(ctx->dev);
ctx->task = task;
ret = gsc_reset(ctx);
if (ret) {
pm_runtime_put_autosuspend(ctx->dev);
ctx->task = NULL;
return ret;
}
gsc_src_set_fmt(ctx, task->src.buf.fourcc, task->src.buf.modifier);
gsc_src_set_transf(ctx, task->transform.rotation);
gsc_src_set_size(ctx, &task->src);
gsc_src_set_addr(ctx, 0, &task->src);
gsc_dst_set_fmt(ctx, task->dst.buf.fourcc, task->dst.buf.modifier);
gsc_dst_set_size(ctx, &task->dst);
gsc_dst_set_addr(ctx, 0, &task->dst);
gsc_set_prescaler(ctx, &ctx->sc, &task->src.rect, &task->dst.rect);
gsc_start(ctx);
return 0;
}
static void gsc_abort(struct exynos_drm_ipp *ipp,
struct exynos_drm_ipp_task *task)
{
struct gsc_context *ctx =
container_of(ipp, struct gsc_context, ipp);
gsc_reset(ctx);
if (ctx->task) {
struct exynos_drm_ipp_task *task = ctx->task;
ctx->task = NULL;
pm_runtime_mark_last_busy(ctx->dev);
pm_runtime_put_autosuspend(ctx->dev);
exynos_drm_ipp_task_done(task, -EIO);
}
}
static struct exynos_drm_ipp_funcs ipp_funcs = {
.commit = gsc_commit,
.abort = gsc_abort,
};
static int gsc_bind(struct device *dev, struct device *master, void *data)
{
struct gsc_context *ctx = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
struct exynos_drm_ipp *ipp = &ctx->ipp;
ctx->drm_dev = drm_dev;
ctx->drm_dev = drm_dev;
exynos_drm_register_dma(drm_dev, dev);
exynos_drm_ipp_register(dev, ipp, &ipp_funcs,
DRM_EXYNOS_IPP_CAP_CROP | DRM_EXYNOS_IPP_CAP_ROTATE |
DRM_EXYNOS_IPP_CAP_SCALE | DRM_EXYNOS_IPP_CAP_CONVERT,
ctx->formats, ctx->num_formats, "gsc");
dev_info(dev, "The exynos gscaler has been probed successfully\n");
return 0;
}
static void gsc_unbind(struct device *dev, struct device *master,
void *data)
{
struct gsc_context *ctx = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
struct exynos_drm_ipp *ipp = &ctx->ipp;
exynos_drm_ipp_unregister(dev, ipp);
exynos_drm_unregister_dma(drm_dev, dev);
}
static const struct component_ops gsc_component_ops = {
.bind = gsc_bind,
.unbind = gsc_unbind,
};
static const unsigned int gsc_formats[] = {
DRM_FORMAT_ARGB8888,
DRM_FORMAT_XRGB8888, DRM_FORMAT_RGB565, DRM_FORMAT_BGRX8888,
DRM_FORMAT_NV12, DRM_FORMAT_NV16, DRM_FORMAT_NV21, DRM_FORMAT_NV61,
DRM_FORMAT_UYVY, DRM_FORMAT_VYUY, DRM_FORMAT_YUYV, DRM_FORMAT_YVYU,
DRM_FORMAT_YUV420, DRM_FORMAT_YVU420, DRM_FORMAT_YUV422,
};
static const unsigned int gsc_tiled_formats[] = {
DRM_FORMAT_NV12, DRM_FORMAT_NV21,
};
static int gsc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct gsc_driverdata *driver_data;
struct exynos_drm_ipp_formats *formats;
struct gsc_context *ctx;
struct resource *res;
int num_formats, ret, i, j;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
driver_data = (struct gsc_driverdata *)of_device_get_match_data(dev);
ctx->dev = dev;
ctx->num_clocks = driver_data->num_clocks;
ctx->clk_names = driver_data->clk_names;
/* construct formats/limits array */
num_formats = ARRAY_SIZE(gsc_formats) + ARRAY_SIZE(gsc_tiled_formats);
formats = devm_kcalloc(dev, num_formats, sizeof(*formats), GFP_KERNEL);
if (!formats)
return -ENOMEM;
/* linear formats */
for (i = 0; i < ARRAY_SIZE(gsc_formats); i++) {
formats[i].fourcc = gsc_formats[i];
formats[i].type = DRM_EXYNOS_IPP_FORMAT_SOURCE |
DRM_EXYNOS_IPP_FORMAT_DESTINATION;
formats[i].limits = driver_data->limits;
formats[i].num_limits = driver_data->num_limits;
}
/* tiled formats */
for (j = i, i = 0; i < ARRAY_SIZE(gsc_tiled_formats); j++, i++) {
formats[j].fourcc = gsc_tiled_formats[i];
formats[j].modifier = DRM_FORMAT_MOD_SAMSUNG_16_16_TILE;
formats[j].type = DRM_EXYNOS_IPP_FORMAT_SOURCE |
DRM_EXYNOS_IPP_FORMAT_DESTINATION;
formats[j].limits = driver_data->limits;
formats[j].num_limits = driver_data->num_limits;
}
ctx->formats = formats;
ctx->num_formats = num_formats;
/* clock control */
for (i = 0; i < ctx->num_clocks; i++) {
ctx->clocks[i] = devm_clk_get(dev, ctx->clk_names[i]);
if (IS_ERR(ctx->clocks[i])) {
dev_err(dev, "failed to get clock: %s\n",
ctx->clk_names[i]);
return PTR_ERR(ctx->clocks[i]);
}
}
/* resource memory */
ctx->regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ctx->regs = devm_ioremap_resource(dev, ctx->regs_res);
if (IS_ERR(ctx->regs))
return PTR_ERR(ctx->regs);
/* resource irq */
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(dev, "failed to request irq resource.\n");
return -ENOENT;
}
ctx->irq = res->start;
ret = devm_request_irq(dev, ctx->irq, gsc_irq_handler, 0,
dev_name(dev), ctx);
if (ret < 0) {
dev_err(dev, "failed to request irq.\n");
return ret;
}
/* context initailization */
ctx->id = pdev->id;
platform_set_drvdata(pdev, ctx);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, GSC_AUTOSUSPEND_DELAY);
pm_runtime_enable(dev);
ret = component_add(dev, &gsc_component_ops);
if (ret)
goto err_pm_dis;
dev_info(dev, "drm gsc registered successfully.\n");
return 0;
err_pm_dis:
pm_runtime_dont_use_autosuspend(dev);
pm_runtime_disable(dev);
return ret;
}
static int gsc_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
pm_runtime_dont_use_autosuspend(dev);
pm_runtime_disable(dev);
return 0;
}
static int __maybe_unused gsc_runtime_suspend(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);
int i;
DRM_DEV_DEBUG_KMS(dev, "id[%d]\n", ctx->id);
for (i = ctx->num_clocks - 1; i >= 0; i--)
clk_disable_unprepare(ctx->clocks[i]);
return 0;
}
static int __maybe_unused gsc_runtime_resume(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);
int i, ret;
DRM_DEV_DEBUG_KMS(dev, "id[%d]\n", ctx->id);
for (i = 0; i < ctx->num_clocks; i++) {
ret = clk_prepare_enable(ctx->clocks[i]);
if (ret) {
while (--i > 0)
clk_disable_unprepare(ctx->clocks[i]);
return ret;
}
}
return 0;
}
static const struct dev_pm_ops gsc_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(gsc_runtime_suspend, gsc_runtime_resume, NULL)
};
static const struct drm_exynos_ipp_limit gsc_5250_limits[] = {
{ IPP_SIZE_LIMIT(BUFFER, .h = { 32, 4800, 8 }, .v = { 16, 3344, 8 }) },
{ IPP_SIZE_LIMIT(AREA, .h = { 16, 4800, 2 }, .v = { 8, 3344, 2 }) },
{ IPP_SIZE_LIMIT(ROTATED, .h = { 32, 2048 }, .v = { 16, 2048 }) },
{ IPP_SCALE_LIMIT(.h = { (1 << 16) / 16, (1 << 16) * 8 },
.v = { (1 << 16) / 16, (1 << 16) * 8 }) },
};
static const struct drm_exynos_ipp_limit gsc_5420_limits[] = {
{ IPP_SIZE_LIMIT(BUFFER, .h = { 32, 4800, 8 }, .v = { 16, 3344, 8 }) },
{ IPP_SIZE_LIMIT(AREA, .h = { 16, 4800, 2 }, .v = { 8, 3344, 2 }) },
{ IPP_SIZE_LIMIT(ROTATED, .h = { 16, 2016 }, .v = { 8, 2016 }) },
{ IPP_SCALE_LIMIT(.h = { (1 << 16) / 16, (1 << 16) * 8 },
.v = { (1 << 16) / 16, (1 << 16) * 8 }) },
};
static const struct drm_exynos_ipp_limit gsc_5433_limits[] = {
{ IPP_SIZE_LIMIT(BUFFER, .h = { 32, 8191, 16 }, .v = { 16, 8191, 2 }) },
{ IPP_SIZE_LIMIT(AREA, .h = { 16, 4800, 1 }, .v = { 8, 3344, 1 }) },
{ IPP_SIZE_LIMIT(ROTATED, .h = { 32, 2047 }, .v = { 8, 8191 }) },
{ IPP_SCALE_LIMIT(.h = { (1 << 16) / 16, (1 << 16) * 8 },
.v = { (1 << 16) / 16, (1 << 16) * 8 }) },
};
static struct gsc_driverdata gsc_exynos5250_drvdata = {
.clk_names = {"gscl"},
.num_clocks = 1,
.limits = gsc_5250_limits,
.num_limits = ARRAY_SIZE(gsc_5250_limits),
};
static struct gsc_driverdata gsc_exynos5420_drvdata = {
.clk_names = {"gscl"},
.num_clocks = 1,
.limits = gsc_5420_limits,
.num_limits = ARRAY_SIZE(gsc_5420_limits),
};
static struct gsc_driverdata gsc_exynos5433_drvdata = {
.clk_names = {"pclk", "aclk", "aclk_xiu", "aclk_gsclbend"},
.num_clocks = 4,
.limits = gsc_5433_limits,
.num_limits = ARRAY_SIZE(gsc_5433_limits),
};
static const struct of_device_id exynos_drm_gsc_of_match[] = {
{
.compatible = "samsung,exynos5-gsc",
.data = &gsc_exynos5250_drvdata,
}, {
.compatible = "samsung,exynos5250-gsc",
.data = &gsc_exynos5250_drvdata,
}, {
.compatible = "samsung,exynos5420-gsc",
.data = &gsc_exynos5420_drvdata,
}, {
.compatible = "samsung,exynos5433-gsc",
.data = &gsc_exynos5433_drvdata,
}, {
},
};
MODULE_DEVICE_TABLE(of, exynos_drm_gsc_of_match);
struct platform_driver gsc_driver = {
.probe = gsc_probe,
.remove = gsc_remove,
.driver = {
.name = "exynos-drm-gsc",
.owner = THIS_MODULE,
.pm = &gsc_pm_ops,
.of_match_table = of_match_ptr(exynos_drm_gsc_of_match),
},
};
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