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linux-sg2042/drivers/gpu/drm/exynos/exynos_drm_gsc.c

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/*
* 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>
*
* 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.
*
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <plat/map-base.h>
#include <drm/drmP.h>
#include <drm/exynos_drm.h>
#include "regs-gsc.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_ipp.h"
#include "exynos_drm_gsc.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.
*
* M2M operation : supports crop/scale/rotation/csc so on.
* Memory ----> GSC H/W ----> Memory.
* Writeback operation : supports cloned screen with FIMD.
* FIMD ----> GSC H/W ----> Memory.
* Output operation : supports direct display using local path.
* Memory ----> GSC H/W ----> FIMD, Mixer.
*/
/*
* TODO
* 1. check suspend/resume api if needed.
* 2. need to check use case platform_device_id.
* 3. check src/dst size with, height.
* 4. added check_prepare api for right register.
* 5. need to add supported list in prop_list.
* 6. check prescaler/scaler optimization.
*/
#define GSC_MAX_DEVS 4
#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_REFRESH_MIN 12
#define GSC_REFRESH_MAX 60
#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 get_gsc_context(dev) platform_get_drvdata(to_platform_device(dev))
#define get_ctx_from_ippdrv(ippdrv) container_of(ippdrv,\
struct gsc_context, ippdrv);
#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 scaler capability.
*
* find user manual 49.2 features.
* @tile_w: tile mode or rotation width.
* @tile_h: tile mode or rotation height.
* @w: other cases width.
* @h: other cases height.
*/
struct gsc_capability {
/* tile or rotation */
u32 tile_w;
u32 tile_h;
/* other cases */
u32 w;
u32 h;
};
/*
* A structure of gsc context.
*
* @ippdrv: prepare initialization using ippdrv.
* @regs_res: register resources.
* @regs: memory mapped io registers.
* @lock: locking of operations.
* @gsc_clk: gsc gate clock.
* @sc: scaler infomations.
* @id: gsc id.
* @irq: irq number.
* @rotation: supports rotation of src.
* @suspended: qos operations.
*/
struct gsc_context {
struct exynos_drm_ippdrv ippdrv;
struct resource *regs_res;
void __iomem *regs;
struct mutex lock;
struct clk *gsc_clk;
struct gsc_scaler sc;
int id;
int irq;
bool rotation;
bool suspended;
};
/* 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_ERROR("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_set_gscblk_fimd_wb(struct gsc_context *ctx, bool enable)
{
u32 gscblk_cfg;
gscblk_cfg = readl(SYSREG_GSCBLK_CFG1);
if (enable)
gscblk_cfg |= GSC_BLK_DISP1WB_DEST(ctx->id) |
GSC_BLK_GSCL_WB_IN_SRC_SEL(ctx->id) |
GSC_BLK_SW_RESET_WB_DEST(ctx->id);
else
gscblk_cfg |= GSC_BLK_PXLASYNC_LO_MASK_WB(ctx->id);
writel(gscblk_cfg, SYSREG_GSCBLK_CFG1);
}
static void gsc_handle_irq(struct gsc_context *ctx, bool enable,
bool overflow, bool done)
{
u32 cfg;
DRM_DEBUG_KMS("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 int gsc_src_set_fmt(struct device *dev, u32 fmt)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
u32 cfg;
DRM_DEBUG_KMS("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:
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:
case DRM_FORMAT_NV61:
cfg |= (GSC_IN_CHROMA_ORDER_CRCB |
GSC_IN_YUV420_2P);
break;
case DRM_FORMAT_YUV422:
cfg |= GSC_IN_YUV422_3P;
break;
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
cfg |= GSC_IN_YUV420_3P;
break;
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV16:
cfg |= (GSC_IN_CHROMA_ORDER_CBCR |
GSC_IN_YUV420_2P);
break;
case DRM_FORMAT_NV12MT:
cfg |= (GSC_IN_TILE_C_16x8 | GSC_IN_TILE_MODE);
break;
default:
dev_err(ippdrv->dev, "inavlid target yuv order 0x%x.\n", fmt);
return -EINVAL;
}
gsc_write(cfg, GSC_IN_CON);
return 0;
}
static int gsc_src_set_transf(struct device *dev,
enum drm_exynos_degree degree,
enum drm_exynos_flip flip, bool *swap)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
u32 cfg;
DRM_DEBUG_KMS("degree[%d]flip[0x%x]\n", degree, flip);
cfg = gsc_read(GSC_IN_CON);
cfg &= ~GSC_IN_ROT_MASK;
switch (degree) {
case EXYNOS_DRM_DEGREE_0:
if (flip & EXYNOS_DRM_FLIP_VERTICAL)
cfg |= GSC_IN_ROT_XFLIP;
if (flip & EXYNOS_DRM_FLIP_HORIZONTAL)
cfg |= GSC_IN_ROT_YFLIP;
break;
case EXYNOS_DRM_DEGREE_90:
if (flip & EXYNOS_DRM_FLIP_VERTICAL)
cfg |= GSC_IN_ROT_90_XFLIP;
else if (flip & EXYNOS_DRM_FLIP_HORIZONTAL)
cfg |= GSC_IN_ROT_90_YFLIP;
else
cfg |= GSC_IN_ROT_90;
break;
case EXYNOS_DRM_DEGREE_180:
cfg |= GSC_IN_ROT_180;
break;
case EXYNOS_DRM_DEGREE_270:
cfg |= GSC_IN_ROT_270;
break;
default:
dev_err(ippdrv->dev, "inavlid degree value %d.\n", degree);
return -EINVAL;
}
gsc_write(cfg, GSC_IN_CON);
ctx->rotation = cfg &
(GSC_IN_ROT_90 | GSC_IN_ROT_270) ? 1 : 0;
*swap = ctx->rotation;
return 0;
}
static int gsc_src_set_size(struct device *dev, int swap,
struct drm_exynos_pos *pos, struct drm_exynos_sz *sz)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct drm_exynos_pos img_pos = *pos;
struct gsc_scaler *sc = &ctx->sc;
u32 cfg;
DRM_DEBUG_KMS("swap[%d]x[%d]y[%d]w[%d]h[%d]\n",
swap, pos->x, pos->y, pos->w, pos->h);
if (swap) {
img_pos.w = pos->h;
img_pos.h = pos->w;
}
/* pixel offset */
cfg = (GSC_SRCIMG_OFFSET_X(img_pos.x) |
GSC_SRCIMG_OFFSET_Y(img_pos.y));
gsc_write(cfg, GSC_SRCIMG_OFFSET);
/* cropped size */
cfg = (GSC_CROPPED_WIDTH(img_pos.w) |
GSC_CROPPED_HEIGHT(img_pos.h));
gsc_write(cfg, GSC_CROPPED_SIZE);
DRM_DEBUG_KMS("hsize[%d]vsize[%d]\n", sz->hsize, sz->vsize);
/* original size */
cfg = gsc_read(GSC_SRCIMG_SIZE);
cfg &= ~(GSC_SRCIMG_HEIGHT_MASK |
GSC_SRCIMG_WIDTH_MASK);
cfg |= (GSC_SRCIMG_WIDTH(sz->hsize) |
GSC_SRCIMG_HEIGHT(sz->vsize));
gsc_write(cfg, GSC_SRCIMG_SIZE);
cfg = gsc_read(GSC_IN_CON);
cfg &= ~GSC_IN_RGB_TYPE_MASK;
DRM_DEBUG_KMS("width[%d]range[%d]\n", pos->w, sc->range);
if (pos->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);
return 0;
}
static int gsc_src_set_buf_seq(struct gsc_context *ctx, u32 buf_id,
enum drm_exynos_ipp_buf_type buf_type)
{
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
bool masked;
u32 cfg;
u32 mask = 0x00000001 << buf_id;
DRM_DEBUG_KMS("buf_id[%d]buf_type[%d]\n", buf_id, buf_type);
/* mask register set */
cfg = gsc_read(GSC_IN_BASE_ADDR_Y_MASK);
switch (buf_type) {
case IPP_BUF_ENQUEUE:
masked = false;
break;
case IPP_BUF_DEQUEUE:
masked = true;
break;
default:
dev_err(ippdrv->dev, "invalid buf ctrl parameter.\n");
return -EINVAL;
}
/* 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);
return 0;
}
static int gsc_src_set_addr(struct device *dev,
struct drm_exynos_ipp_buf_info *buf_info, u32 buf_id,
enum drm_exynos_ipp_buf_type buf_type)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
struct drm_exynos_ipp_cmd_node *c_node = ippdrv->c_node;
struct drm_exynos_ipp_property *property;
if (!c_node) {
DRM_ERROR("failed to get c_node.\n");
return -EFAULT;
}
property = &c_node->property;
DRM_DEBUG_KMS("prop_id[%d]buf_id[%d]buf_type[%d]\n",
property->prop_id, buf_id, buf_type);
if (buf_id > GSC_MAX_SRC) {
dev_info(ippdrv->dev, "inavlid buf_id %d.\n", buf_id);
return -EINVAL;
}
/* address register set */
switch (buf_type) {
case IPP_BUF_ENQUEUE:
gsc_write(buf_info->base[EXYNOS_DRM_PLANAR_Y],
GSC_IN_BASE_ADDR_Y(buf_id));
gsc_write(buf_info->base[EXYNOS_DRM_PLANAR_CB],
GSC_IN_BASE_ADDR_CB(buf_id));
gsc_write(buf_info->base[EXYNOS_DRM_PLANAR_CR],
GSC_IN_BASE_ADDR_CR(buf_id));
break;
case IPP_BUF_DEQUEUE:
gsc_write(0x0, GSC_IN_BASE_ADDR_Y(buf_id));
gsc_write(0x0, GSC_IN_BASE_ADDR_CB(buf_id));
gsc_write(0x0, GSC_IN_BASE_ADDR_CR(buf_id));
break;
default:
/* bypass */
break;
}
return gsc_src_set_buf_seq(ctx, buf_id, buf_type);
}
static struct exynos_drm_ipp_ops gsc_src_ops = {
.set_fmt = gsc_src_set_fmt,
.set_transf = gsc_src_set_transf,
.set_size = gsc_src_set_size,
.set_addr = gsc_src_set_addr,
};
static int gsc_dst_set_fmt(struct device *dev, u32 fmt)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
u32 cfg;
DRM_DEBUG_KMS("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_XRGB8888:
cfg |= GSC_OUT_XRGB8888;
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:
case DRM_FORMAT_NV61:
cfg |= (GSC_OUT_CHROMA_ORDER_CRCB | GSC_OUT_YUV420_2P);
break;
case DRM_FORMAT_YUV422:
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
cfg |= GSC_OUT_YUV420_3P;
break;
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV16:
cfg |= (GSC_OUT_CHROMA_ORDER_CBCR |
GSC_OUT_YUV420_2P);
break;
case DRM_FORMAT_NV12MT:
cfg |= (GSC_OUT_TILE_C_16x8 | GSC_OUT_TILE_MODE);
break;
default:
dev_err(ippdrv->dev, "inavlid target yuv order 0x%x.\n", fmt);
return -EINVAL;
}
gsc_write(cfg, GSC_OUT_CON);
return 0;
}
static int gsc_dst_set_transf(struct device *dev,
enum drm_exynos_degree degree,
enum drm_exynos_flip flip, bool *swap)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
u32 cfg;
DRM_DEBUG_KMS("degree[%d]flip[0x%x]\n", degree, flip);
cfg = gsc_read(GSC_IN_CON);
cfg &= ~GSC_IN_ROT_MASK;
switch (degree) {
case EXYNOS_DRM_DEGREE_0:
if (flip & EXYNOS_DRM_FLIP_VERTICAL)
cfg |= GSC_IN_ROT_XFLIP;
if (flip & EXYNOS_DRM_FLIP_HORIZONTAL)
cfg |= GSC_IN_ROT_YFLIP;
break;
case EXYNOS_DRM_DEGREE_90:
if (flip & EXYNOS_DRM_FLIP_VERTICAL)
cfg |= GSC_IN_ROT_90_XFLIP;
else if (flip & EXYNOS_DRM_FLIP_HORIZONTAL)
cfg |= GSC_IN_ROT_90_YFLIP;
else
cfg |= GSC_IN_ROT_90;
break;
case EXYNOS_DRM_DEGREE_180:
cfg |= GSC_IN_ROT_180;
break;
case EXYNOS_DRM_DEGREE_270:
cfg |= GSC_IN_ROT_270;
break;
default:
dev_err(ippdrv->dev, "inavlid degree value %d.\n", degree);
return -EINVAL;
}
gsc_write(cfg, GSC_IN_CON);
ctx->rotation = cfg &
(GSC_IN_ROT_90 | GSC_IN_ROT_270) ? 1 : 0;
*swap = ctx->rotation;
return 0;
}
static int gsc_get_ratio_shift(u32 src, u32 dst, u32 *ratio)
{
DRM_DEBUG_KMS("src[%d]dst[%d]\n", src, dst);
if (src >= dst * 8) {
DRM_ERROR("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_pos *src, struct drm_exynos_pos *dst)
{
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
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(src_w, dst_w, &sc->pre_hratio);
if (ret) {
dev_err(ippdrv->dev, "failed to get ratio horizontal.\n");
return ret;
}
ret = gsc_get_ratio_shift(src_h, dst_h, &sc->pre_vratio);
if (ret) {
dev_err(ippdrv->dev, "failed to get ratio vertical.\n");
return ret;
}
DRM_DEBUG_KMS("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_DEBUG_KMS("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_DEBUG_KMS("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_DEBUG_KMS("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 int gsc_dst_set_size(struct device *dev, int swap,
struct drm_exynos_pos *pos, struct drm_exynos_sz *sz)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct drm_exynos_pos img_pos = *pos;
struct gsc_scaler *sc = &ctx->sc;
u32 cfg;
DRM_DEBUG_KMS("swap[%d]x[%d]y[%d]w[%d]h[%d]\n",
swap, pos->x, pos->y, pos->w, pos->h);
if (swap) {
img_pos.w = pos->h;
img_pos.h = pos->w;
}
/* pixel offset */
cfg = (GSC_DSTIMG_OFFSET_X(pos->x) |
GSC_DSTIMG_OFFSET_Y(pos->y));
gsc_write(cfg, GSC_DSTIMG_OFFSET);
/* scaled size */
cfg = (GSC_SCALED_WIDTH(img_pos.w) | GSC_SCALED_HEIGHT(img_pos.h));
gsc_write(cfg, GSC_SCALED_SIZE);
DRM_DEBUG_KMS("hsize[%d]vsize[%d]\n", sz->hsize, sz->vsize);
/* original size */
cfg = gsc_read(GSC_DSTIMG_SIZE);
cfg &= ~(GSC_DSTIMG_HEIGHT_MASK |
GSC_DSTIMG_WIDTH_MASK);
cfg |= (GSC_DSTIMG_WIDTH(sz->hsize) |
GSC_DSTIMG_HEIGHT(sz->vsize));
gsc_write(cfg, GSC_DSTIMG_SIZE);
cfg = gsc_read(GSC_OUT_CON);
cfg &= ~GSC_OUT_RGB_TYPE_MASK;
DRM_DEBUG_KMS("width[%d]range[%d]\n", pos->w, sc->range);
if (pos->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);
return 0;
}
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_DEBUG_KMS("buf_num[%d]\n", buf_num);
return buf_num;
}
static int gsc_dst_set_buf_seq(struct gsc_context *ctx, u32 buf_id,
enum drm_exynos_ipp_buf_type buf_type)
{
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
bool masked;
u32 cfg;
u32 mask = 0x00000001 << buf_id;
int ret = 0;
DRM_DEBUG_KMS("buf_id[%d]buf_type[%d]\n", buf_id, buf_type);
mutex_lock(&ctx->lock);
/* mask register set */
cfg = gsc_read(GSC_OUT_BASE_ADDR_Y_MASK);
switch (buf_type) {
case IPP_BUF_ENQUEUE:
masked = false;
break;
case IPP_BUF_DEQUEUE:
masked = true;
break;
default:
dev_err(ippdrv->dev, "invalid buf ctrl parameter.\n");
ret = -EINVAL;
goto err_unlock;
}
/* 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 (buf_type == IPP_BUF_ENQUEUE &&
gsc_dst_get_buf_seq(ctx) >= GSC_BUF_START)
gsc_handle_irq(ctx, true, false, true);
/* interrupt disable */
if (buf_type == IPP_BUF_DEQUEUE &&
gsc_dst_get_buf_seq(ctx) <= GSC_BUF_STOP)
gsc_handle_irq(ctx, false, false, true);
err_unlock:
mutex_unlock(&ctx->lock);
return ret;
}
static int gsc_dst_set_addr(struct device *dev,
struct drm_exynos_ipp_buf_info *buf_info, u32 buf_id,
enum drm_exynos_ipp_buf_type buf_type)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
struct drm_exynos_ipp_cmd_node *c_node = ippdrv->c_node;
struct drm_exynos_ipp_property *property;
if (!c_node) {
DRM_ERROR("failed to get c_node.\n");
return -EFAULT;
}
property = &c_node->property;
DRM_DEBUG_KMS("prop_id[%d]buf_id[%d]buf_type[%d]\n",
property->prop_id, buf_id, buf_type);
if (buf_id > GSC_MAX_DST) {
dev_info(ippdrv->dev, "inavlid buf_id %d.\n", buf_id);
return -EINVAL;
}
/* address register set */
switch (buf_type) {
case IPP_BUF_ENQUEUE:
gsc_write(buf_info->base[EXYNOS_DRM_PLANAR_Y],
GSC_OUT_BASE_ADDR_Y(buf_id));
gsc_write(buf_info->base[EXYNOS_DRM_PLANAR_CB],
GSC_OUT_BASE_ADDR_CB(buf_id));
gsc_write(buf_info->base[EXYNOS_DRM_PLANAR_CR],
GSC_OUT_BASE_ADDR_CR(buf_id));
break;
case IPP_BUF_DEQUEUE:
gsc_write(0x0, GSC_OUT_BASE_ADDR_Y(buf_id));
gsc_write(0x0, GSC_OUT_BASE_ADDR_CB(buf_id));
gsc_write(0x0, GSC_OUT_BASE_ADDR_CR(buf_id));
break;
default:
/* bypass */
break;
}
return gsc_dst_set_buf_seq(ctx, buf_id, buf_type);
}
static struct exynos_drm_ipp_ops gsc_dst_ops = {
.set_fmt = gsc_dst_set_fmt,
.set_transf = gsc_dst_set_transf,
.set_size = gsc_dst_set_size,
.set_addr = gsc_dst_set_addr,
};
static int gsc_clk_ctrl(struct gsc_context *ctx, bool enable)
{
DRM_DEBUG_KMS("enable[%d]\n", enable);
if (enable) {
clk_enable(ctx->gsc_clk);
ctx->suspended = false;
} else {
clk_disable(ctx->gsc_clk);
ctx->suspended = true;
}
return 0;
}
static int gsc_get_src_buf_index(struct gsc_context *ctx)
{
u32 cfg, curr_index, i;
u32 buf_id = GSC_MAX_SRC;
int ret;
DRM_DEBUG_KMS("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;
}
}
if (buf_id == GSC_MAX_SRC) {
DRM_ERROR("failed to get in buffer index.\n");
return -EINVAL;
}
ret = gsc_src_set_buf_seq(ctx, buf_id, IPP_BUF_DEQUEUE);
if (ret < 0) {
DRM_ERROR("failed to dequeue.\n");
return ret;
}
DRM_DEBUG_KMS("cfg[0x%x]curr_index[%d]buf_id[%d]\n", cfg,
curr_index, buf_id);
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;
int ret;
DRM_DEBUG_KMS("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_ERROR("failed to get out buffer index.\n");
return -EINVAL;
}
ret = gsc_dst_set_buf_seq(ctx, buf_id, IPP_BUF_DEQUEUE);
if (ret < 0) {
DRM_ERROR("failed to dequeue.\n");
return ret;
}
DRM_DEBUG_KMS("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;
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
struct drm_exynos_ipp_cmd_node *c_node = ippdrv->c_node;
struct drm_exynos_ipp_event_work *event_work =
c_node->event_work;
u32 status;
int buf_id[EXYNOS_DRM_OPS_MAX];
DRM_DEBUG_KMS("gsc id[%d]\n", ctx->id);
status = gsc_read(GSC_IRQ);
if (status & GSC_IRQ_STATUS_OR_IRQ) {
dev_err(ippdrv->dev, "occurred overflow at %d, status 0x%x.\n",
ctx->id, status);
return IRQ_NONE;
}
if (status & GSC_IRQ_STATUS_OR_FRM_DONE) {
dev_dbg(ippdrv->dev, "occurred frame done at %d, status 0x%x.\n",
ctx->id, status);
buf_id[EXYNOS_DRM_OPS_SRC] = gsc_get_src_buf_index(ctx);
if (buf_id[EXYNOS_DRM_OPS_SRC] < 0)
return IRQ_HANDLED;
buf_id[EXYNOS_DRM_OPS_DST] = gsc_get_dst_buf_index(ctx);
if (buf_id[EXYNOS_DRM_OPS_DST] < 0)
return IRQ_HANDLED;
DRM_DEBUG_KMS("buf_id_src[%d]buf_id_dst[%d]\n",
buf_id[EXYNOS_DRM_OPS_SRC], buf_id[EXYNOS_DRM_OPS_DST]);
event_work->ippdrv = ippdrv;
event_work->buf_id[EXYNOS_DRM_OPS_SRC] =
buf_id[EXYNOS_DRM_OPS_SRC];
event_work->buf_id[EXYNOS_DRM_OPS_DST] =
buf_id[EXYNOS_DRM_OPS_DST];
queue_work(ippdrv->event_workq,
(struct work_struct *)event_work);
}
return IRQ_HANDLED;
}
static int gsc_init_prop_list(struct exynos_drm_ippdrv *ippdrv)
{
struct drm_exynos_ipp_prop_list *prop_list = &ippdrv->prop_list;
prop_list->version = 1;
prop_list->writeback = 1;
prop_list->refresh_min = GSC_REFRESH_MIN;
prop_list->refresh_max = GSC_REFRESH_MAX;
prop_list->flip = (1 << EXYNOS_DRM_FLIP_VERTICAL) |
(1 << EXYNOS_DRM_FLIP_HORIZONTAL);
prop_list->degree = (1 << EXYNOS_DRM_DEGREE_0) |
(1 << EXYNOS_DRM_DEGREE_90) |
(1 << EXYNOS_DRM_DEGREE_180) |
(1 << EXYNOS_DRM_DEGREE_270);
prop_list->csc = 1;
prop_list->crop = 1;
prop_list->crop_max.hsize = GSC_CROP_MAX;
prop_list->crop_max.vsize = GSC_CROP_MAX;
prop_list->crop_min.hsize = GSC_CROP_MIN;
prop_list->crop_min.vsize = GSC_CROP_MIN;
prop_list->scale = 1;
prop_list->scale_max.hsize = GSC_SCALE_MAX;
prop_list->scale_max.vsize = GSC_SCALE_MAX;
prop_list->scale_min.hsize = GSC_SCALE_MIN;
prop_list->scale_min.vsize = GSC_SCALE_MIN;
return 0;
}
static inline bool gsc_check_drm_flip(enum drm_exynos_flip flip)
{
switch (flip) {
case EXYNOS_DRM_FLIP_NONE:
case EXYNOS_DRM_FLIP_VERTICAL:
case EXYNOS_DRM_FLIP_HORIZONTAL:
case EXYNOS_DRM_FLIP_BOTH:
return true;
default:
DRM_DEBUG_KMS("invalid flip\n");
return false;
}
}
static int gsc_ippdrv_check_property(struct device *dev,
struct drm_exynos_ipp_property *property)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
struct drm_exynos_ipp_prop_list *pp = &ippdrv->prop_list;
struct drm_exynos_ipp_config *config;
struct drm_exynos_pos *pos;
struct drm_exynos_sz *sz;
bool swap;
int i;
for_each_ipp_ops(i) {
if ((i == EXYNOS_DRM_OPS_SRC) &&
(property->cmd == IPP_CMD_WB))
continue;
config = &property->config[i];
pos = &config->pos;
sz = &config->sz;
/* check for flip */
if (!gsc_check_drm_flip(config->flip)) {
DRM_ERROR("invalid flip.\n");
goto err_property;
}
/* check for degree */
switch (config->degree) {
case EXYNOS_DRM_DEGREE_90:
case EXYNOS_DRM_DEGREE_270:
swap = true;
break;
case EXYNOS_DRM_DEGREE_0:
case EXYNOS_DRM_DEGREE_180:
swap = false;
break;
default:
DRM_ERROR("invalid degree.\n");
goto err_property;
}
/* check for buffer bound */
if ((pos->x + pos->w > sz->hsize) ||
(pos->y + pos->h > sz->vsize)) {
DRM_ERROR("out of buf bound.\n");
goto err_property;
}
/* check for crop */
if ((i == EXYNOS_DRM_OPS_SRC) && (pp->crop)) {
if (swap) {
if ((pos->h < pp->crop_min.hsize) ||
(sz->vsize > pp->crop_max.hsize) ||
(pos->w < pp->crop_min.vsize) ||
(sz->hsize > pp->crop_max.vsize)) {
DRM_ERROR("out of crop size.\n");
goto err_property;
}
} else {
if ((pos->w < pp->crop_min.hsize) ||
(sz->hsize > pp->crop_max.hsize) ||
(pos->h < pp->crop_min.vsize) ||
(sz->vsize > pp->crop_max.vsize)) {
DRM_ERROR("out of crop size.\n");
goto err_property;
}
}
}
/* check for scale */
if ((i == EXYNOS_DRM_OPS_DST) && (pp->scale)) {
if (swap) {
if ((pos->h < pp->scale_min.hsize) ||
(sz->vsize > pp->scale_max.hsize) ||
(pos->w < pp->scale_min.vsize) ||
(sz->hsize > pp->scale_max.vsize)) {
DRM_ERROR("out of scale size.\n");
goto err_property;
}
} else {
if ((pos->w < pp->scale_min.hsize) ||
(sz->hsize > pp->scale_max.hsize) ||
(pos->h < pp->scale_min.vsize) ||
(sz->vsize > pp->scale_max.vsize)) {
DRM_ERROR("out of scale size.\n");
goto err_property;
}
}
}
}
return 0;
err_property:
for_each_ipp_ops(i) {
if ((i == EXYNOS_DRM_OPS_SRC) &&
(property->cmd == IPP_CMD_WB))
continue;
config = &property->config[i];
pos = &config->pos;
sz = &config->sz;
DRM_ERROR("[%s]f[%d]r[%d]pos[%d %d %d %d]sz[%d %d]\n",
i ? "dst" : "src", config->flip, config->degree,
pos->x, pos->y, pos->w, pos->h,
sz->hsize, sz->vsize);
}
return -EINVAL;
}
static int gsc_ippdrv_reset(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct gsc_scaler *sc = &ctx->sc;
int ret;
/* reset h/w block */
ret = gsc_sw_reset(ctx);
if (ret < 0) {
dev_err(dev, "failed to reset hardware.\n");
return ret;
}
/* scaler setting */
memset(&ctx->sc, 0x0, sizeof(ctx->sc));
sc->range = true;
return 0;
}
static int gsc_ippdrv_start(struct device *dev, enum drm_exynos_ipp_cmd cmd)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
struct drm_exynos_ipp_cmd_node *c_node = ippdrv->c_node;
struct drm_exynos_ipp_property *property;
struct drm_exynos_ipp_config *config;
struct drm_exynos_pos img_pos[EXYNOS_DRM_OPS_MAX];
struct drm_exynos_ipp_set_wb set_wb;
u32 cfg;
int ret, i;
DRM_DEBUG_KMS("cmd[%d]\n", cmd);
if (!c_node) {
DRM_ERROR("failed to get c_node.\n");
return -EINVAL;
}
property = &c_node->property;
gsc_handle_irq(ctx, true, false, true);
for_each_ipp_ops(i) {
config = &property->config[i];
img_pos[i] = config->pos;
}
switch (cmd) {
case IPP_CMD_M2M:
/* 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);
break;
case IPP_CMD_WB:
set_wb.enable = 1;
set_wb.refresh = property->refresh_rate;
gsc_set_gscblk_fimd_wb(ctx, set_wb.enable);
exynos_drm_ippnb_send_event(IPP_SET_WRITEBACK, (void *)&set_wb);
/* src local path */
cfg = gsc_read(GSC_IN_CON);
cfg &= ~(GSC_IN_PATH_MASK | GSC_IN_LOCAL_SEL_MASK);
cfg |= (GSC_IN_PATH_LOCAL | GSC_IN_LOCAL_FIMD_WB);
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);
break;
case IPP_CMD_OUTPUT:
/* 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 local path */
cfg = gsc_read(GSC_OUT_CON);
cfg |= GSC_OUT_PATH_MEMORY;
gsc_write(cfg, GSC_OUT_CON);
break;
default:
ret = -EINVAL;
dev_err(dev, "invalid operations.\n");
return ret;
}
ret = gsc_set_prescaler(ctx, &ctx->sc,
&img_pos[EXYNOS_DRM_OPS_SRC],
&img_pos[EXYNOS_DRM_OPS_DST]);
if (ret) {
dev_err(dev, "failed to set precalser.\n");
return ret;
}
gsc_set_scaler(ctx, &ctx->sc);
cfg = gsc_read(GSC_ENABLE);
cfg |= GSC_ENABLE_ON;
gsc_write(cfg, GSC_ENABLE);
return 0;
}
static void gsc_ippdrv_stop(struct device *dev, enum drm_exynos_ipp_cmd cmd)
{
struct gsc_context *ctx = get_gsc_context(dev);
struct drm_exynos_ipp_set_wb set_wb = {0, 0};
u32 cfg;
DRM_DEBUG_KMS("cmd[%d]\n", cmd);
switch (cmd) {
case IPP_CMD_M2M:
/* bypass */
break;
case IPP_CMD_WB:
gsc_set_gscblk_fimd_wb(ctx, set_wb.enable);
exynos_drm_ippnb_send_event(IPP_SET_WRITEBACK, (void *)&set_wb);
break;
case IPP_CMD_OUTPUT:
default:
dev_err(dev, "invalid operations.\n");
break;
}
gsc_handle_irq(ctx, false, false, true);
/* reset sequence */
gsc_write(0xff, GSC_OUT_BASE_ADDR_Y_MASK);
gsc_write(0xff, GSC_OUT_BASE_ADDR_CB_MASK);
gsc_write(0xff, GSC_OUT_BASE_ADDR_CR_MASK);
cfg = gsc_read(GSC_ENABLE);
cfg &= ~GSC_ENABLE_ON;
gsc_write(cfg, GSC_ENABLE);
}
static int gsc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct gsc_context *ctx;
struct resource *res;
struct exynos_drm_ippdrv *ippdrv;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
/* clock control */
ctx->gsc_clk = devm_clk_get(dev, "gscl");
if (IS_ERR(ctx->gsc_clk)) {
dev_err(dev, "failed to get gsc clock.\n");
return PTR_ERR(ctx->gsc_clk);
}
/* 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_threaded_irq(dev, ctx->irq, NULL, gsc_irq_handler,
IRQF_ONESHOT, "drm_gsc", ctx);
if (ret < 0) {
dev_err(dev, "failed to request irq.\n");
return ret;
}
/* context initailization */
ctx->id = pdev->id;
ippdrv = &ctx->ippdrv;
ippdrv->dev = dev;
ippdrv->ops[EXYNOS_DRM_OPS_SRC] = &gsc_src_ops;
ippdrv->ops[EXYNOS_DRM_OPS_DST] = &gsc_dst_ops;
ippdrv->check_property = gsc_ippdrv_check_property;
ippdrv->reset = gsc_ippdrv_reset;
ippdrv->start = gsc_ippdrv_start;
ippdrv->stop = gsc_ippdrv_stop;
ret = gsc_init_prop_list(ippdrv);
if (ret < 0) {
dev_err(dev, "failed to init property list.\n");
return ret;
}
DRM_DEBUG_KMS("id[%d]ippdrv[0x%x]\n", ctx->id, (int)ippdrv);
mutex_init(&ctx->lock);
platform_set_drvdata(pdev, ctx);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
ret = exynos_drm_ippdrv_register(ippdrv);
if (ret < 0) {
dev_err(dev, "failed to register drm gsc device.\n");
goto err_ippdrv_register;
}
dev_info(dev, "drm gsc registered successfully.\n");
return 0;
err_ippdrv_register:
pm_runtime_disable(dev);
return ret;
}
static int gsc_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct gsc_context *ctx = get_gsc_context(dev);
struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
exynos_drm_ippdrv_unregister(ippdrv);
mutex_destroy(&ctx->lock);
pm_runtime_set_suspended(dev);
pm_runtime_disable(dev);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int gsc_suspend(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);
DRM_DEBUG_KMS("id[%d]\n", ctx->id);
if (pm_runtime_suspended(dev))
return 0;
return gsc_clk_ctrl(ctx, false);
}
static int gsc_resume(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);
DRM_DEBUG_KMS("id[%d]\n", ctx->id);
if (!pm_runtime_suspended(dev))
return gsc_clk_ctrl(ctx, true);
return 0;
}
#endif
#ifdef CONFIG_PM_RUNTIME
static int gsc_runtime_suspend(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);
DRM_DEBUG_KMS("id[%d]\n", ctx->id);
return gsc_clk_ctrl(ctx, false);
}
static int gsc_runtime_resume(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);
DRM_DEBUG_KMS("id[%d]\n", ctx->id);
return gsc_clk_ctrl(ctx, true);
}
#endif
static const struct dev_pm_ops gsc_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(gsc_suspend, gsc_resume)
SET_RUNTIME_PM_OPS(gsc_runtime_suspend, gsc_runtime_resume, NULL)
};
struct platform_driver gsc_driver = {
.probe = gsc_probe,
.remove = gsc_remove,
.driver = {
.name = "exynos-drm-gsc",
.owner = THIS_MODULE,
.pm = &gsc_pm_ops,
},
};
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