* [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-08-30 6:39 ` zheng-yan.chen
0 siblings, 0 replies; 54+ messages in thread
From: zheng-yan.chen @ 2022-08-30 6:39 UTC (permalink / raw)
To: Chun-Kuang Hu, Rob Herring, Krzysztof Kozlowski, Matthias Brugger
Cc: dri-devel, linux-mediatek, devicetree, linux-kernel,
linux-arm-kernel, Jason-JH . Lin, Singo Chang,
Project_Global_Chrome_Upstream_Group, zheng-yan.chen
Since the previous gamma_set_common() function is designed for
9bit-to-10bit conversion, which is not feasible for the
10bit-to-12bit conversion in mt8195.
Update the function to fit the need of mt8195.
Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0 support for mt8195")
Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++-----
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
8 files changed, 85 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
index 0f9d7efb61d7..f563eee3c330 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
@@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
if (aal->data && aal->data->has_gamma)
- mtk_gamma_set_common(aal->regs, state, false);
+ mtk_gamma_set_common(aal->regs, state, dev);
}
void mtk_aal_start(struct device *dev)
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index 33e61a136bbc..c1269fce9a66 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
void mtk_gamma_config(struct device *dev, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
+unsigned int mtk_gamma_size(struct device *dev);
void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state);
-void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff);
+void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev);
void mtk_gamma_start(struct device *dev);
void mtk_gamma_stop(struct device *dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
index bbd558a036ec..0409e15fceb3 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
@@ -18,18 +18,22 @@
#define DISP_GAMMA_EN 0x0000
#define GAMMA_EN BIT(0)
#define DISP_GAMMA_CFG 0x0020
+#define RELAY_MODE BIT(0)
#define GAMMA_LUT_EN BIT(1)
#define GAMMA_DITHERING BIT(2)
#define DISP_GAMMA_SIZE 0x0030
+#define DISP_GAMMA_BANK 0x0100
#define DISP_GAMMA_LUT 0x0700
-
-#define LUT_10BIT_MASK 0x03ff
-
+#define DISP_GAMMA_LUT1 0x0b00
+#define TABLE_9BIT_SIZE 512
+#define TABLE_10BIT_SIZE 1024
+#define BANK_SIZE 256
struct mtk_disp_gamma_data {
bool has_dither;
bool lut_diff;
+ unsigned int lut_size;
+ unsigned int lut_bits;
};
-
/*
* struct mtk_disp_gamma - DISP_GAMMA driver structure
*/
@@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
clk_disable_unprepare(gamma->clk);
}
-void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff)
+void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev)
{
- unsigned int i, reg;
- struct drm_color_lut *lut;
+ unsigned int i, reg, idx;
void __iomem *lut_base;
- u32 word;
- u32 diff[3] = {0};
+ void __iomem *lut1_base;
+ u32 word, word1;
+ struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
if (state->gamma_lut) {
+ u32 table_size;
+ u32 mask;
+ u32 lut_bits;
+ u32 shift_bits;
+ bool lut_diff;
+ struct drm_color_lut color, color_rec;
+ struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
+
+ table_size = gamma->data->lut_size;
+ lut_bits = gamma->data->lut_bits;
+ lut_diff = gamma->data->lut_diff;
+ shift_bits = (lut_bits == 12) ? 4 : 6;
+ mask = GENMASK(lut_bits - 1, 0);
reg = readl(regs + DISP_GAMMA_CFG);
+ reg = reg & ~RELAY_MODE;
reg = reg | GAMMA_LUT_EN;
writel(reg, regs + DISP_GAMMA_CFG);
lut_base = regs + DISP_GAMMA_LUT;
- lut = (struct drm_color_lut *)state->gamma_lut->data;
- for (i = 0; i < MTK_LUT_SIZE; i++) {
-
- if (!lut_diff || (i % 2 == 0)) {
- word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) +
- (((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) +
- ((lut[i].blue >> 6) & LUT_10BIT_MASK);
+ lut1_base = regs + DISP_GAMMA_LUT1;
+ for (i = 0; i < table_size; i++) {
+ color.red = (lut[i].red >> shift_bits) & mask;
+ color.green = (lut[i].green >> shift_bits) & mask;
+ color.blue = (lut[i].blue >> shift_bits) & mask;
+ if (lut_diff && (i % 2)) {
+ word = (lut_bits == 12) ?
+ (((color.green - color_rec.green) << 12) +
+ (color.red - color_rec.red))
+ :
+ (((color.red - color_rec.red) << 20) +
+ ((color.green - color_rec.green) << 10) +
+ (color.blue - color_rec.blue));
+ word1 = (color.blue - color_rec.blue);
} else {
- diff[0] = (lut[i].red >> 6) - (lut[i - 1].red >> 6);
- diff[1] = (lut[i].green >> 6) - (lut[i - 1].green >> 6);
- diff[2] = (lut[i].blue >> 6) - (lut[i - 1].blue >> 6);
-
- word = ((diff[0] & LUT_10BIT_MASK) << 20) +
- ((diff[1] & LUT_10BIT_MASK) << 10) +
- (diff[2] & LUT_10BIT_MASK);
+ word = (lut_bits == 12) ?
+ ((color.green << 12) + color.red)
+ :
+ ((color.red << 20) +
+ (color.green << 10) + color.blue);
+ word1 = color.blue;
+ color_rec = color;
}
- writel(word, (lut_base + i * 4));
+ idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
+ writel(word, (lut_base + idx * 4));
+ if (!(i % BANK_SIZE) && lut_bits == 12)
+ writel((i / BANK_SIZE), regs + DISP_GAMMA_BANK);
+ if (lut_bits == 12)
+ writel(word1, (lut1_base + idx * 4));
}
}
}
+unsigned int mtk_gamma_size(struct device *dev)
+{
+ struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
+
+ if (gamma->data)
+ return gamma->data->lut_size;
+ else
+ return 0;
+}
void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
{
struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
@@ -95,8 +134,7 @@ void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
if (gamma->data)
lut_diff = gamma->data->lut_diff;
-
- mtk_gamma_set_common(gamma->regs, state, lut_diff);
+ mtk_gamma_set_common(gamma->regs, state, dev);
}
void mtk_gamma_config(struct device *dev, unsigned int w,
@@ -191,10 +229,20 @@ static int mtk_disp_gamma_remove(struct platform_device *pdev)
static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
.has_dither = true,
+ .lut_size = 512,
+ .lut_bits = 10,
};
static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = {
.lut_diff = true,
+ .lut_size = 512,
+ .lut_bits = 10,
+};
+
+static const struct mtk_disp_gamma_data mt8195_gamma_driver_data = {
+ .lut_diff = true,
+ .lut_size = 1024,
+ .lut_bits = 12,
};
static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = {
@@ -202,6 +250,8 @@ static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = {
.data = &mt8173_gamma_driver_data},
{ .compatible = "mediatek,mt8183-disp-gamma",
.data = &mt8183_gamma_driver_data},
+ { .compatible = "mediatek,mt8195-disp-gamma",
+ .data = &mt8195_gamma_driver_data},
{},
};
MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 42cc7052b050..2a6513259562 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -930,9 +930,8 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
mtk_crtc->ddp_comp[i] = comp;
if (comp->funcs) {
- if (comp->funcs->gamma_set)
- gamma_lut_size = MTK_LUT_SIZE;
-
+ if (comp->funcs->gamma_set && comp->funcs->gamma_size)
+ gamma_lut_size = comp->funcs->gamma_size(comp->dev);
if (comp->funcs->ctm_set)
has_ctm = true;
}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
index cb9a36c48d4f..1799853ef89a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
@@ -10,7 +10,6 @@
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_plane.h"
-#define MTK_LUT_SIZE 512
#define MTK_MAX_BPC 10
#define MTK_MIN_BPC 3
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 2d72cc5ddaba..4c6538a17b88 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs ddp_gamma = {
.clk_enable = mtk_gamma_clk_enable,
.clk_disable = mtk_gamma_clk_disable,
.gamma_set = mtk_gamma_set,
+ .gamma_size = mtk_gamma_size,
.config = mtk_gamma_config,
.start = mtk_gamma_start,
.stop = mtk_gamma_stop,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 2d0052c23dcb..bf0cf7f86010 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
void (*disable_vblank)(struct device *dev);
unsigned int (*supported_rotations)(struct device *dev);
unsigned int (*layer_nr)(struct device *dev);
+ unsigned int (*gamma_size)(struct device *dev);
int (*layer_check)(struct device *dev,
unsigned int idx,
struct mtk_plane_state *state);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 0e4c77724b05..473766be56e1 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -567,6 +567,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
.data = (void *)MTK_DISP_GAMMA, },
{ .compatible = "mediatek,mt8183-disp-gamma",
.data = (void *)MTK_DISP_GAMMA, },
+ { .compatible = "mediatek,mt8195-disp-gamma",
+ .data = (void *)MTK_DISP_GAMMA, },
{ .compatible = "mediatek,mt8195-disp-merge",
.data = (void *)MTK_DISP_MERGE },
{ .compatible = "mediatek,mt2701-disp-mutex",
--
2.18.0
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 54+ messages in thread* [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-08-30 6:39 ` zheng-yan.chen
0 siblings, 0 replies; 54+ messages in thread
From: zheng-yan.chen @ 2022-08-30 6:39 UTC (permalink / raw)
To: Chun-Kuang Hu, Rob Herring, Krzysztof Kozlowski, Matthias Brugger
Cc: dri-devel, linux-mediatek, devicetree, linux-kernel,
linux-arm-kernel, Jason-JH . Lin, Singo Chang,
Project_Global_Chrome_Upstream_Group, zheng-yan.chen
Since the previous gamma_set_common() function is designed for
9bit-to-10bit conversion, which is not feasible for the
10bit-to-12bit conversion in mt8195.
Update the function to fit the need of mt8195.
Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0 support for mt8195")
Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++-----
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
8 files changed, 85 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
index 0f9d7efb61d7..f563eee3c330 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
@@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
if (aal->data && aal->data->has_gamma)
- mtk_gamma_set_common(aal->regs, state, false);
+ mtk_gamma_set_common(aal->regs, state, dev);
}
void mtk_aal_start(struct device *dev)
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index 33e61a136bbc..c1269fce9a66 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
void mtk_gamma_config(struct device *dev, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
+unsigned int mtk_gamma_size(struct device *dev);
void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state);
-void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff);
+void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev);
void mtk_gamma_start(struct device *dev);
void mtk_gamma_stop(struct device *dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
index bbd558a036ec..0409e15fceb3 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
@@ -18,18 +18,22 @@
#define DISP_GAMMA_EN 0x0000
#define GAMMA_EN BIT(0)
#define DISP_GAMMA_CFG 0x0020
+#define RELAY_MODE BIT(0)
#define GAMMA_LUT_EN BIT(1)
#define GAMMA_DITHERING BIT(2)
#define DISP_GAMMA_SIZE 0x0030
+#define DISP_GAMMA_BANK 0x0100
#define DISP_GAMMA_LUT 0x0700
-
-#define LUT_10BIT_MASK 0x03ff
-
+#define DISP_GAMMA_LUT1 0x0b00
+#define TABLE_9BIT_SIZE 512
+#define TABLE_10BIT_SIZE 1024
+#define BANK_SIZE 256
struct mtk_disp_gamma_data {
bool has_dither;
bool lut_diff;
+ unsigned int lut_size;
+ unsigned int lut_bits;
};
-
/*
* struct mtk_disp_gamma - DISP_GAMMA driver structure
*/
@@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
clk_disable_unprepare(gamma->clk);
}
-void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff)
+void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev)
{
- unsigned int i, reg;
- struct drm_color_lut *lut;
+ unsigned int i, reg, idx;
void __iomem *lut_base;
- u32 word;
- u32 diff[3] = {0};
+ void __iomem *lut1_base;
+ u32 word, word1;
+ struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
if (state->gamma_lut) {
+ u32 table_size;
+ u32 mask;
+ u32 lut_bits;
+ u32 shift_bits;
+ bool lut_diff;
+ struct drm_color_lut color, color_rec;
+ struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
+
+ table_size = gamma->data->lut_size;
+ lut_bits = gamma->data->lut_bits;
+ lut_diff = gamma->data->lut_diff;
+ shift_bits = (lut_bits == 12) ? 4 : 6;
+ mask = GENMASK(lut_bits - 1, 0);
reg = readl(regs + DISP_GAMMA_CFG);
+ reg = reg & ~RELAY_MODE;
reg = reg | GAMMA_LUT_EN;
writel(reg, regs + DISP_GAMMA_CFG);
lut_base = regs + DISP_GAMMA_LUT;
- lut = (struct drm_color_lut *)state->gamma_lut->data;
- for (i = 0; i < MTK_LUT_SIZE; i++) {
-
- if (!lut_diff || (i % 2 == 0)) {
- word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) +
- (((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) +
- ((lut[i].blue >> 6) & LUT_10BIT_MASK);
+ lut1_base = regs + DISP_GAMMA_LUT1;
+ for (i = 0; i < table_size; i++) {
+ color.red = (lut[i].red >> shift_bits) & mask;
+ color.green = (lut[i].green >> shift_bits) & mask;
+ color.blue = (lut[i].blue >> shift_bits) & mask;
+ if (lut_diff && (i % 2)) {
+ word = (lut_bits == 12) ?
+ (((color.green - color_rec.green) << 12) +
+ (color.red - color_rec.red))
+ :
+ (((color.red - color_rec.red) << 20) +
+ ((color.green - color_rec.green) << 10) +
+ (color.blue - color_rec.blue));
+ word1 = (color.blue - color_rec.blue);
} else {
- diff[0] = (lut[i].red >> 6) - (lut[i - 1].red >> 6);
- diff[1] = (lut[i].green >> 6) - (lut[i - 1].green >> 6);
- diff[2] = (lut[i].blue >> 6) - (lut[i - 1].blue >> 6);
-
- word = ((diff[0] & LUT_10BIT_MASK) << 20) +
- ((diff[1] & LUT_10BIT_MASK) << 10) +
- (diff[2] & LUT_10BIT_MASK);
+ word = (lut_bits == 12) ?
+ ((color.green << 12) + color.red)
+ :
+ ((color.red << 20) +
+ (color.green << 10) + color.blue);
+ word1 = color.blue;
+ color_rec = color;
}
- writel(word, (lut_base + i * 4));
+ idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
+ writel(word, (lut_base + idx * 4));
+ if (!(i % BANK_SIZE) && lut_bits == 12)
+ writel((i / BANK_SIZE), regs + DISP_GAMMA_BANK);
+ if (lut_bits == 12)
+ writel(word1, (lut1_base + idx * 4));
}
}
}
+unsigned int mtk_gamma_size(struct device *dev)
+{
+ struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
+
+ if (gamma->data)
+ return gamma->data->lut_size;
+ else
+ return 0;
+}
void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
{
struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
@@ -95,8 +134,7 @@ void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
if (gamma->data)
lut_diff = gamma->data->lut_diff;
-
- mtk_gamma_set_common(gamma->regs, state, lut_diff);
+ mtk_gamma_set_common(gamma->regs, state, dev);
}
void mtk_gamma_config(struct device *dev, unsigned int w,
@@ -191,10 +229,20 @@ static int mtk_disp_gamma_remove(struct platform_device *pdev)
static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
.has_dither = true,
+ .lut_size = 512,
+ .lut_bits = 10,
};
static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = {
.lut_diff = true,
+ .lut_size = 512,
+ .lut_bits = 10,
+};
+
+static const struct mtk_disp_gamma_data mt8195_gamma_driver_data = {
+ .lut_diff = true,
+ .lut_size = 1024,
+ .lut_bits = 12,
};
static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = {
@@ -202,6 +250,8 @@ static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = {
.data = &mt8173_gamma_driver_data},
{ .compatible = "mediatek,mt8183-disp-gamma",
.data = &mt8183_gamma_driver_data},
+ { .compatible = "mediatek,mt8195-disp-gamma",
+ .data = &mt8195_gamma_driver_data},
{},
};
MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 42cc7052b050..2a6513259562 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -930,9 +930,8 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
mtk_crtc->ddp_comp[i] = comp;
if (comp->funcs) {
- if (comp->funcs->gamma_set)
- gamma_lut_size = MTK_LUT_SIZE;
-
+ if (comp->funcs->gamma_set && comp->funcs->gamma_size)
+ gamma_lut_size = comp->funcs->gamma_size(comp->dev);
if (comp->funcs->ctm_set)
has_ctm = true;
}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
index cb9a36c48d4f..1799853ef89a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
@@ -10,7 +10,6 @@
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_plane.h"
-#define MTK_LUT_SIZE 512
#define MTK_MAX_BPC 10
#define MTK_MIN_BPC 3
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 2d72cc5ddaba..4c6538a17b88 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs ddp_gamma = {
.clk_enable = mtk_gamma_clk_enable,
.clk_disable = mtk_gamma_clk_disable,
.gamma_set = mtk_gamma_set,
+ .gamma_size = mtk_gamma_size,
.config = mtk_gamma_config,
.start = mtk_gamma_start,
.stop = mtk_gamma_stop,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 2d0052c23dcb..bf0cf7f86010 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
void (*disable_vblank)(struct device *dev);
unsigned int (*supported_rotations)(struct device *dev);
unsigned int (*layer_nr)(struct device *dev);
+ unsigned int (*gamma_size)(struct device *dev);
int (*layer_check)(struct device *dev,
unsigned int idx,
struct mtk_plane_state *state);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 0e4c77724b05..473766be56e1 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -567,6 +567,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
.data = (void *)MTK_DISP_GAMMA, },
{ .compatible = "mediatek,mt8183-disp-gamma",
.data = (void *)MTK_DISP_GAMMA, },
+ { .compatible = "mediatek,mt8195-disp-gamma",
+ .data = (void *)MTK_DISP_GAMMA, },
{ .compatible = "mediatek,mt8195-disp-merge",
.data = (void *)MTK_DISP_MERGE },
{ .compatible = "mediatek,mt2701-disp-mutex",
--
2.18.0
^ permalink raw reply related [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
2022-08-30 6:39 ` zheng-yan.chen
(?)
@ 2022-08-30 7:47 ` AngeloGioacchino Del Regno
-1 siblings, 0 replies; 54+ messages in thread
From: AngeloGioacchino Del Regno @ 2022-08-30 7:47 UTC (permalink / raw)
To: zheng-yan.chen, Chun-Kuang Hu, Rob Herring, Krzysztof Kozlowski,
Matthias Brugger
Cc: dri-devel, linux-mediatek, devicetree, linux-kernel,
linux-arm-kernel, Jason-JH . Lin, Singo Chang,
Project_Global_Chrome_Upstream_Group
Il 30/08/22 08:39, zheng-yan.chen ha scritto:
> Since the previous gamma_set_common() function is designed for
> 9bit-to-10bit conversion, which is not feasible for the
> 10bit-to-12bit conversion in mt8195.
>
> Update the function to fit the need of mt8195.
>
> Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0 support for mt8195")
> Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++-----
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> 8 files changed, 85 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> index 0f9d7efb61d7..f563eee3c330 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
> struct mtk_disp_aal *aal = dev_get_drvdata(dev);
>
> if (aal->data && aal->data->has_gamma)
> - mtk_gamma_set_common(aal->regs, state, false);
> + mtk_gamma_set_common(aal->regs, state, dev);
> }
>
> void mtk_aal_start(struct device *dev)
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 33e61a136bbc..c1269fce9a66 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> void mtk_gamma_config(struct device *dev, unsigned int w,
> unsigned int h, unsigned int vrefresh,
> unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +unsigned int mtk_gamma_size(struct device *dev);
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state);
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff);
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev);
> void mtk_gamma_start(struct device *dev);
> void mtk_gamma_stop(struct device *dev);
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index bbd558a036ec..0409e15fceb3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -18,18 +18,22 @@
> #define DISP_GAMMA_EN 0x0000
> #define GAMMA_EN BIT(0)
> #define DISP_GAMMA_CFG 0x0020
> +#define RELAY_MODE BIT(0)
> #define GAMMA_LUT_EN BIT(1)
> #define GAMMA_DITHERING BIT(2)
> #define DISP_GAMMA_SIZE 0x0030
> +#define DISP_GAMMA_BANK 0x0100
> #define DISP_GAMMA_LUT 0x0700
> -
> -#define LUT_10BIT_MASK 0x03ff
> -
> +#define DISP_GAMMA_LUT1 0x0b00
> +#define TABLE_9BIT_SIZE 512
> +#define TABLE_10BIT_SIZE 1024
Please remove these two unused definitions.
> +#define BANK_SIZE 256
> struct mtk_disp_gamma_data {
> bool has_dither;
> bool lut_diff;
> + unsigned int lut_size;
> + unsigned int lut_bits;
We can reduce the size of this structure by using
u16 lut_size;
u8 lut_bits;
> };
> -
> /*
> * struct mtk_disp_gamma - DISP_GAMMA driver structure
> */
> @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> clk_disable_unprepare(gamma->clk);
> }
>
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff)
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev)
> {
> - unsigned int i, reg;
> - struct drm_color_lut *lut;
> + unsigned int i, reg, idx;
> void __iomem *lut_base;
> - u32 word;
> - u32 diff[3] = {0};
> + void __iomem *lut1_base;
> + u32 word, word1;
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
Please reorder these definitions, (columns) longest first, shortest last
>
> if (state->gamma_lut) {
> + u32 table_size;
> + u32 mask;
> + u32 lut_bits;
> + u32 shift_bits;
> + bool lut_diff;
> + struct drm_color_lut color, color_rec;
> + struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
struct drm_color_lut color, color_rec;
u32 lut_bits, shift_bits;
u32 mask, table_size;
bool lut_diff;
> +
> + table_size = gamma->data->lut_size;
> + lut_bits = gamma->data->lut_bits;
> + lut_diff = gamma->data->lut_diff;
> + shift_bits = (lut_bits == 12) ? 4 : 6;
> + mask = GENMASK(lut_bits - 1, 0);
> reg = readl(regs + DISP_GAMMA_CFG);
> + reg = reg & ~RELAY_MODE;
> reg = reg | GAMMA_LUT_EN;
> writel(reg, regs + DISP_GAMMA_CFG);
> lut_base = regs + DISP_GAMMA_LUT;
> - lut = (struct drm_color_lut *)state->gamma_lut->data;
> - for (i = 0; i < MTK_LUT_SIZE; i++) {
> -
> - if (!lut_diff || (i % 2 == 0)) {
> - word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) +
> - (((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) +
> - ((lut[i].blue >> 6) & LUT_10BIT_MASK);
> + lut1_base = regs + DISP_GAMMA_LUT1;
> + for (i = 0; i < table_size; i++) {
> + color.red = (lut[i].red >> shift_bits) & mask;
> + color.green = (lut[i].green >> shift_bits) & mask;
> + color.blue = (lut[i].blue >> shift_bits) & mask;
> + if (lut_diff && (i % 2)) {
> + word = (lut_bits == 12) ?
> + (((color.green - color_rec.green) << 12) +
> + (color.red - color_rec.red))
> + :
> + (((color.red - color_rec.red) << 20) +
> + ((color.green - color_rec.green) << 10) +
> + (color.blue - color_rec.blue));
> + word1 = (color.blue - color_rec.blue);
> } else {
> - diff[0] = (lut[i].red >> 6) - (lut[i - 1].red >> 6);
> - diff[1] = (lut[i].green >> 6) - (lut[i - 1].green >> 6);
> - diff[2] = (lut[i].blue >> 6) - (lut[i - 1].blue >> 6);
> -
> - word = ((diff[0] & LUT_10BIT_MASK) << 20) +
> - ((diff[1] & LUT_10BIT_MASK) << 10) +
> - (diff[2] & LUT_10BIT_MASK);
> + word = (lut_bits == 12) ?
> + ((color.green << 12) + color.red)
> + :
> + ((color.red << 20) +
> + (color.green << 10) + color.blue);
> + word1 = color.blue;
> + color_rec = color;
> }
> - writel(word, (lut_base + i * 4));
> + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> + writel(word, (lut_base + idx * 4));
> + if (!(i % BANK_SIZE) && lut_bits == 12)
> + writel((i / BANK_SIZE), regs + DISP_GAMMA_BANK);
> + if (lut_bits == 12)
> + writel(word1, (lut1_base + idx * 4));
> }
> }
> }
>
> +unsigned int mtk_gamma_size(struct device *dev)
unsigned int mtk_gamma_get_lut_size(struct device *dev)
that looks a bit more readable and perfectly explains this function :-)
> +{
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> +
> + if (gamma->data)
> + return gamma->data->lut_size;
> + else
> + return 0;
> +}
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
> {
> struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
..snip..
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index 2d72cc5ddaba..4c6538a17b88 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs ddp_gamma = {
> .clk_enable = mtk_gamma_clk_enable,
> .clk_disable = mtk_gamma_clk_disable,
> .gamma_set = mtk_gamma_set,
> + .gamma_size = mtk_gamma_size,
> .config = mtk_gamma_config,
> .start = mtk_gamma_start,
> .stop = mtk_gamma_stop,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 2d0052c23dcb..bf0cf7f86010 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> void (*disable_vblank)(struct device *dev);
> unsigned int (*supported_rotations)(struct device *dev);
> unsigned int (*layer_nr)(struct device *dev);
> + unsigned int (*gamma_size)(struct device *dev);
unsigned int (*gamma_get_lut_size)(struct device *dev);
> int (*layer_check)(struct device *dev,
> unsigned int idx,
> struct mtk_plane_state *state);
Regards,
Angelo
^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-08-30 7:47 ` AngeloGioacchino Del Regno
0 siblings, 0 replies; 54+ messages in thread
From: AngeloGioacchino Del Regno @ 2022-08-30 7:47 UTC (permalink / raw)
To: zheng-yan.chen, Chun-Kuang Hu, Rob Herring, Krzysztof Kozlowski,
Matthias Brugger
Cc: dri-devel, linux-mediatek, devicetree, linux-kernel,
linux-arm-kernel, Jason-JH . Lin, Singo Chang,
Project_Global_Chrome_Upstream_Group
Il 30/08/22 08:39, zheng-yan.chen ha scritto:
> Since the previous gamma_set_common() function is designed for
> 9bit-to-10bit conversion, which is not feasible for the
> 10bit-to-12bit conversion in mt8195.
>
> Update the function to fit the need of mt8195.
>
> Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0 support for mt8195")
> Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++-----
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> 8 files changed, 85 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> index 0f9d7efb61d7..f563eee3c330 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
> struct mtk_disp_aal *aal = dev_get_drvdata(dev);
>
> if (aal->data && aal->data->has_gamma)
> - mtk_gamma_set_common(aal->regs, state, false);
> + mtk_gamma_set_common(aal->regs, state, dev);
> }
>
> void mtk_aal_start(struct device *dev)
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 33e61a136bbc..c1269fce9a66 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> void mtk_gamma_config(struct device *dev, unsigned int w,
> unsigned int h, unsigned int vrefresh,
> unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +unsigned int mtk_gamma_size(struct device *dev);
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state);
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff);
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev);
> void mtk_gamma_start(struct device *dev);
> void mtk_gamma_stop(struct device *dev);
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index bbd558a036ec..0409e15fceb3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -18,18 +18,22 @@
> #define DISP_GAMMA_EN 0x0000
> #define GAMMA_EN BIT(0)
> #define DISP_GAMMA_CFG 0x0020
> +#define RELAY_MODE BIT(0)
> #define GAMMA_LUT_EN BIT(1)
> #define GAMMA_DITHERING BIT(2)
> #define DISP_GAMMA_SIZE 0x0030
> +#define DISP_GAMMA_BANK 0x0100
> #define DISP_GAMMA_LUT 0x0700
> -
> -#define LUT_10BIT_MASK 0x03ff
> -
> +#define DISP_GAMMA_LUT1 0x0b00
> +#define TABLE_9BIT_SIZE 512
> +#define TABLE_10BIT_SIZE 1024
Please remove these two unused definitions.
> +#define BANK_SIZE 256
> struct mtk_disp_gamma_data {
> bool has_dither;
> bool lut_diff;
> + unsigned int lut_size;
> + unsigned int lut_bits;
We can reduce the size of this structure by using
u16 lut_size;
u8 lut_bits;
> };
> -
> /*
> * struct mtk_disp_gamma - DISP_GAMMA driver structure
> */
> @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> clk_disable_unprepare(gamma->clk);
> }
>
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff)
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev)
> {
> - unsigned int i, reg;
> - struct drm_color_lut *lut;
> + unsigned int i, reg, idx;
> void __iomem *lut_base;
> - u32 word;
> - u32 diff[3] = {0};
> + void __iomem *lut1_base;
> + u32 word, word1;
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
Please reorder these definitions, (columns) longest first, shortest last
>
> if (state->gamma_lut) {
> + u32 table_size;
> + u32 mask;
> + u32 lut_bits;
> + u32 shift_bits;
> + bool lut_diff;
> + struct drm_color_lut color, color_rec;
> + struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
struct drm_color_lut color, color_rec;
u32 lut_bits, shift_bits;
u32 mask, table_size;
bool lut_diff;
> +
> + table_size = gamma->data->lut_size;
> + lut_bits = gamma->data->lut_bits;
> + lut_diff = gamma->data->lut_diff;
> + shift_bits = (lut_bits == 12) ? 4 : 6;
> + mask = GENMASK(lut_bits - 1, 0);
> reg = readl(regs + DISP_GAMMA_CFG);
> + reg = reg & ~RELAY_MODE;
> reg = reg | GAMMA_LUT_EN;
> writel(reg, regs + DISP_GAMMA_CFG);
> lut_base = regs + DISP_GAMMA_LUT;
> - lut = (struct drm_color_lut *)state->gamma_lut->data;
> - for (i = 0; i < MTK_LUT_SIZE; i++) {
> -
> - if (!lut_diff || (i % 2 == 0)) {
> - word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) +
> - (((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) +
> - ((lut[i].blue >> 6) & LUT_10BIT_MASK);
> + lut1_base = regs + DISP_GAMMA_LUT1;
> + for (i = 0; i < table_size; i++) {
> + color.red = (lut[i].red >> shift_bits) & mask;
> + color.green = (lut[i].green >> shift_bits) & mask;
> + color.blue = (lut[i].blue >> shift_bits) & mask;
> + if (lut_diff && (i % 2)) {
> + word = (lut_bits == 12) ?
> + (((color.green - color_rec.green) << 12) +
> + (color.red - color_rec.red))
> + :
> + (((color.red - color_rec.red) << 20) +
> + ((color.green - color_rec.green) << 10) +
> + (color.blue - color_rec.blue));
> + word1 = (color.blue - color_rec.blue);
> } else {
> - diff[0] = (lut[i].red >> 6) - (lut[i - 1].red >> 6);
> - diff[1] = (lut[i].green >> 6) - (lut[i - 1].green >> 6);
> - diff[2] = (lut[i].blue >> 6) - (lut[i - 1].blue >> 6);
> -
> - word = ((diff[0] & LUT_10BIT_MASK) << 20) +
> - ((diff[1] & LUT_10BIT_MASK) << 10) +
> - (diff[2] & LUT_10BIT_MASK);
> + word = (lut_bits == 12) ?
> + ((color.green << 12) + color.red)
> + :
> + ((color.red << 20) +
> + (color.green << 10) + color.blue);
> + word1 = color.blue;
> + color_rec = color;
> }
> - writel(word, (lut_base + i * 4));
> + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> + writel(word, (lut_base + idx * 4));
> + if (!(i % BANK_SIZE) && lut_bits == 12)
> + writel((i / BANK_SIZE), regs + DISP_GAMMA_BANK);
> + if (lut_bits == 12)
> + writel(word1, (lut1_base + idx * 4));
> }
> }
> }
>
> +unsigned int mtk_gamma_size(struct device *dev)
unsigned int mtk_gamma_get_lut_size(struct device *dev)
that looks a bit more readable and perfectly explains this function :-)
> +{
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> +
> + if (gamma->data)
> + return gamma->data->lut_size;
> + else
> + return 0;
> +}
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
> {
> struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
..snip..
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index 2d72cc5ddaba..4c6538a17b88 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs ddp_gamma = {
> .clk_enable = mtk_gamma_clk_enable,
> .clk_disable = mtk_gamma_clk_disable,
> .gamma_set = mtk_gamma_set,
> + .gamma_size = mtk_gamma_size,
> .config = mtk_gamma_config,
> .start = mtk_gamma_start,
> .stop = mtk_gamma_stop,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 2d0052c23dcb..bf0cf7f86010 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> void (*disable_vblank)(struct device *dev);
> unsigned int (*supported_rotations)(struct device *dev);
> unsigned int (*layer_nr)(struct device *dev);
> + unsigned int (*gamma_size)(struct device *dev);
unsigned int (*gamma_get_lut_size)(struct device *dev);
> int (*layer_check)(struct device *dev,
> unsigned int idx,
> struct mtk_plane_state *state);
Regards,
Angelo
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-08-30 7:47 ` AngeloGioacchino Del Regno
0 siblings, 0 replies; 54+ messages in thread
From: AngeloGioacchino Del Regno @ 2022-08-30 7:47 UTC (permalink / raw)
To: zheng-yan.chen, Chun-Kuang Hu, Rob Herring, Krzysztof Kozlowski,
Matthias Brugger
Cc: devicetree, Jason-JH . Lin, Singo Chang, linux-kernel, dri-devel,
Project_Global_Chrome_Upstream_Group, linux-mediatek,
linux-arm-kernel
Il 30/08/22 08:39, zheng-yan.chen ha scritto:
> Since the previous gamma_set_common() function is designed for
> 9bit-to-10bit conversion, which is not feasible for the
> 10bit-to-12bit conversion in mt8195.
>
> Update the function to fit the need of mt8195.
>
> Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0 support for mt8195")
> Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++-----
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> 8 files changed, 85 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> index 0f9d7efb61d7..f563eee3c330 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
> struct mtk_disp_aal *aal = dev_get_drvdata(dev);
>
> if (aal->data && aal->data->has_gamma)
> - mtk_gamma_set_common(aal->regs, state, false);
> + mtk_gamma_set_common(aal->regs, state, dev);
> }
>
> void mtk_aal_start(struct device *dev)
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 33e61a136bbc..c1269fce9a66 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> void mtk_gamma_config(struct device *dev, unsigned int w,
> unsigned int h, unsigned int vrefresh,
> unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +unsigned int mtk_gamma_size(struct device *dev);
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state);
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff);
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev);
> void mtk_gamma_start(struct device *dev);
> void mtk_gamma_stop(struct device *dev);
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index bbd558a036ec..0409e15fceb3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -18,18 +18,22 @@
> #define DISP_GAMMA_EN 0x0000
> #define GAMMA_EN BIT(0)
> #define DISP_GAMMA_CFG 0x0020
> +#define RELAY_MODE BIT(0)
> #define GAMMA_LUT_EN BIT(1)
> #define GAMMA_DITHERING BIT(2)
> #define DISP_GAMMA_SIZE 0x0030
> +#define DISP_GAMMA_BANK 0x0100
> #define DISP_GAMMA_LUT 0x0700
> -
> -#define LUT_10BIT_MASK 0x03ff
> -
> +#define DISP_GAMMA_LUT1 0x0b00
> +#define TABLE_9BIT_SIZE 512
> +#define TABLE_10BIT_SIZE 1024
Please remove these two unused definitions.
> +#define BANK_SIZE 256
> struct mtk_disp_gamma_data {
> bool has_dither;
> bool lut_diff;
> + unsigned int lut_size;
> + unsigned int lut_bits;
We can reduce the size of this structure by using
u16 lut_size;
u8 lut_bits;
> };
> -
> /*
> * struct mtk_disp_gamma - DISP_GAMMA driver structure
> */
> @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> clk_disable_unprepare(gamma->clk);
> }
>
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, bool lut_diff)
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state, struct device *dev)
> {
> - unsigned int i, reg;
> - struct drm_color_lut *lut;
> + unsigned int i, reg, idx;
> void __iomem *lut_base;
> - u32 word;
> - u32 diff[3] = {0};
> + void __iomem *lut1_base;
> + u32 word, word1;
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
Please reorder these definitions, (columns) longest first, shortest last
>
> if (state->gamma_lut) {
> + u32 table_size;
> + u32 mask;
> + u32 lut_bits;
> + u32 shift_bits;
> + bool lut_diff;
> + struct drm_color_lut color, color_rec;
> + struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
struct drm_color_lut color, color_rec;
u32 lut_bits, shift_bits;
u32 mask, table_size;
bool lut_diff;
> +
> + table_size = gamma->data->lut_size;
> + lut_bits = gamma->data->lut_bits;
> + lut_diff = gamma->data->lut_diff;
> + shift_bits = (lut_bits == 12) ? 4 : 6;
> + mask = GENMASK(lut_bits - 1, 0);
> reg = readl(regs + DISP_GAMMA_CFG);
> + reg = reg & ~RELAY_MODE;
> reg = reg | GAMMA_LUT_EN;
> writel(reg, regs + DISP_GAMMA_CFG);
> lut_base = regs + DISP_GAMMA_LUT;
> - lut = (struct drm_color_lut *)state->gamma_lut->data;
> - for (i = 0; i < MTK_LUT_SIZE; i++) {
> -
> - if (!lut_diff || (i % 2 == 0)) {
> - word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) +
> - (((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) +
> - ((lut[i].blue >> 6) & LUT_10BIT_MASK);
> + lut1_base = regs + DISP_GAMMA_LUT1;
> + for (i = 0; i < table_size; i++) {
> + color.red = (lut[i].red >> shift_bits) & mask;
> + color.green = (lut[i].green >> shift_bits) & mask;
> + color.blue = (lut[i].blue >> shift_bits) & mask;
> + if (lut_diff && (i % 2)) {
> + word = (lut_bits == 12) ?
> + (((color.green - color_rec.green) << 12) +
> + (color.red - color_rec.red))
> + :
> + (((color.red - color_rec.red) << 20) +
> + ((color.green - color_rec.green) << 10) +
> + (color.blue - color_rec.blue));
> + word1 = (color.blue - color_rec.blue);
> } else {
> - diff[0] = (lut[i].red >> 6) - (lut[i - 1].red >> 6);
> - diff[1] = (lut[i].green >> 6) - (lut[i - 1].green >> 6);
> - diff[2] = (lut[i].blue >> 6) - (lut[i - 1].blue >> 6);
> -
> - word = ((diff[0] & LUT_10BIT_MASK) << 20) +
> - ((diff[1] & LUT_10BIT_MASK) << 10) +
> - (diff[2] & LUT_10BIT_MASK);
> + word = (lut_bits == 12) ?
> + ((color.green << 12) + color.red)
> + :
> + ((color.red << 20) +
> + (color.green << 10) + color.blue);
> + word1 = color.blue;
> + color_rec = color;
> }
> - writel(word, (lut_base + i * 4));
> + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> + writel(word, (lut_base + idx * 4));
> + if (!(i % BANK_SIZE) && lut_bits == 12)
> + writel((i / BANK_SIZE), regs + DISP_GAMMA_BANK);
> + if (lut_bits == 12)
> + writel(word1, (lut1_base + idx * 4));
> }
> }
> }
>
> +unsigned int mtk_gamma_size(struct device *dev)
unsigned int mtk_gamma_get_lut_size(struct device *dev)
that looks a bit more readable and perfectly explains this function :-)
> +{
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> +
> + if (gamma->data)
> + return gamma->data->lut_size;
> + else
> + return 0;
> +}
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
> {
> struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
..snip..
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index 2d72cc5ddaba..4c6538a17b88 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs ddp_gamma = {
> .clk_enable = mtk_gamma_clk_enable,
> .clk_disable = mtk_gamma_clk_disable,
> .gamma_set = mtk_gamma_set,
> + .gamma_size = mtk_gamma_size,
> .config = mtk_gamma_config,
> .start = mtk_gamma_start,
> .stop = mtk_gamma_stop,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 2d0052c23dcb..bf0cf7f86010 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> void (*disable_vblank)(struct device *dev);
> unsigned int (*supported_rotations)(struct device *dev);
> unsigned int (*layer_nr)(struct device *dev);
> + unsigned int (*gamma_size)(struct device *dev);
unsigned int (*gamma_get_lut_size)(struct device *dev);
> int (*layer_check)(struct device *dev,
> unsigned int idx,
> struct mtk_plane_state *state);
Regards,
Angelo
^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
2022-08-30 7:47 ` AngeloGioacchino Del Regno
(?)
@ 2022-08-30 8:09 ` zheng-yan.chen
-1 siblings, 0 replies; 54+ messages in thread
From: zheng-yan.chen @ 2022-08-30 8:09 UTC (permalink / raw)
To: AngeloGioacchino Del Regno, Chun-Kuang Hu, Rob Herring,
Krzysztof Kozlowski, Matthias Brugger
Cc: devicetree, Jason-JH . Lin, Singo Chang, linux-kernel, dri-devel,
Project_Global_Chrome_Upstream_Group, linux-mediatek,
linux-arm-kernel
On Tue, 2022-08-30 at 09:47 +0200, AngeloGioacchino Del Regno wrote:
> Il 30/08/22 08:39, zheng-yan.chen ha scritto:
> > Since the previous gamma_set_common() function is designed for
> > 9bit-to-10bit conversion, which is not feasible for the
> > 10bit-to-12bit conversion in mt8195.
> >
> > Update the function to fit the need of mt8195.
> >
> > Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> > support for mt8195")
> > Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> > drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> > drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102
> > +++++++++++++++-----
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> > 8 files changed, 85 insertions(+), 32 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > index 0f9d7efb61d7..f563eee3c330 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> > drm_crtc_state *state)
> > struct mtk_disp_aal *aal = dev_get_drvdata(dev);
> >
> > if (aal->data && aal->data->has_gamma)
> > - mtk_gamma_set_common(aal->regs, state, false);
> > + mtk_gamma_set_common(aal->regs, state, dev);
> > }
> >
> > void mtk_aal_start(struct device *dev)
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > index 33e61a136bbc..c1269fce9a66 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> > void mtk_gamma_config(struct device *dev, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> > +unsigned int mtk_gamma_size(struct device *dev);
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state);
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, bool lut_diff);
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, struct device *dev);
> > void mtk_gamma_start(struct device *dev);
> > void mtk_gamma_stop(struct device *dev);
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > index bbd558a036ec..0409e15fceb3 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > @@ -18,18 +18,22 @@
> > #define DISP_GAMMA_EN 0x0000
> > #define GAMMA_EN BIT(0)
> > #define DISP_GAMMA_CFG 0x0020
> > +#define RELAY_MODE BIT(0)
> > #define GAMMA_LUT_EN BIT(1)
> > #define GAMMA_DITHERING BIT(2)
> > #define DISP_GAMMA_SIZE 0x0030
> > +#define DISP_GAMMA_BANK 0x0100
> > #define DISP_GAMMA_LUT 0x0700
> > -
> > -#define LUT_10BIT_MASK 0x03ff
> > -
> > +#define DISP_GAMMA_LUT1 0x0b00
> > +#define TABLE_9BIT_SIZE 512
> > +#define TABLE_10BIT_SIZE 1024
>
> Please remove these two unused definitions.
>
> > +#define BANK_SIZE 256
> > struct mtk_disp_gamma_data {
> > bool has_dither;
> > bool lut_diff;
> > + unsigned int lut_size;
> > + unsigned int lut_bits;
>
> We can reduce the size of this structure by using
>
> u16 lut_size;
> u8 lut_bits;
>
> > };
OK, I will fix it.
> > -
> > /*
> > * struct mtk_disp_gamma - DISP_GAMMA driver structure
> > */
> > @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> > clk_disable_unprepare(gamma->clk);
> > }
> >
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, bool lut_diff)
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, struct device *dev)
> > {
> > - unsigned int i, reg;
> > - struct drm_color_lut *lut;
> > + unsigned int i, reg, idx;
> > void __iomem *lut_base;
> > - u32 word;
> > - u32 diff[3] = {0};
> > + void __iomem *lut1_base;
> > + u32 word, word1;
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> Please reorder these definitions, (columns) longest first, shortest
> last
>
OK, I will fix it.
> >
> > if (state->gamma_lut) {
> > + u32 table_size;
> > + u32 mask;
> > + u32 lut_bits;
> > + u32 shift_bits;
> > + bool lut_diff;
> > + struct drm_color_lut color, color_rec;
> > + struct drm_color_lut *lut = (struct drm_color_lut
> > *)state->gamma_lut;
>
>
> struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
> struct drm_color_lut color, color_rec;
> u32 lut_bits, shift_bits;
> u32 mask, table_size;
> bool lut_diff;
>
> > +
> > + table_size = gamma->data->lut_size;
> > + lut_bits = gamma->data->lut_bits;
> > + lut_diff = gamma->data->lut_diff;
> > + shift_bits = (lut_bits == 12) ? 4 : 6;
> > + mask = GENMASK(lut_bits - 1, 0);
> > reg = readl(regs + DISP_GAMMA_CFG);
> > + reg = reg & ~RELAY_MODE;
> > reg = reg | GAMMA_LUT_EN;
> > writel(reg, regs + DISP_GAMMA_CFG);
> > lut_base = regs + DISP_GAMMA_LUT;
> > - lut = (struct drm_color_lut *)state->gamma_lut->data;
> > - for (i = 0; i < MTK_LUT_SIZE; i++) {
> > -
> > - if (!lut_diff || (i % 2 == 0)) {
> > - word = (((lut[i].red >> 6) &
> > LUT_10BIT_MASK) << 20) +
> > - (((lut[i].green >> 6) &
> > LUT_10BIT_MASK) << 10) +
> > - ((lut[i].blue >> 6) &
> > LUT_10BIT_MASK);
> > + lut1_base = regs + DISP_GAMMA_LUT1;
> > + for (i = 0; i < table_size; i++) {
> > + color.red = (lut[i].red >> shift_bits) & mask;
> > + color.green = (lut[i].green >> shift_bits) &
> > mask;
> > + color.blue = (lut[i].blue >> shift_bits) &
> > mask;
> > + if (lut_diff && (i % 2)) {
> > + word = (lut_bits == 12) ?
> > + (((color.green -
> > color_rec.green) << 12) +
> > + (color.red -
> > color_rec.red))
> > + :
> > + (((color.red -
> > color_rec.red) << 20) +
> > + ((color.green -
> > color_rec.green) << 10) +
> > + (color.blue -
> > color_rec.blue));
> > + word1 = (color.blue - color_rec.blue);
> > } else {
> > - diff[0] = (lut[i].red >> 6) - (lut[i -
> > 1].red >> 6);
> > - diff[1] = (lut[i].green >> 6) - (lut[i
> > - 1].green >> 6);
> > - diff[2] = (lut[i].blue >> 6) - (lut[i -
> > 1].blue >> 6);
> > -
> > - word = ((diff[0] & LUT_10BIT_MASK) <<
> > 20) +
> > - ((diff[1] & LUT_10BIT_MASK) <<
> > 10) +
> > - (diff[2] & LUT_10BIT_MASK);
> > + word = (lut_bits == 12) ?
> > + ((color.green <<
> > 12) + color.red)
> > + :
> > + ((color.red <<
> > 20) +
> > + (color.green <<
> > 10) + color.blue);
> > + word1 = color.blue;
> > + color_rec = color;
> > }
> > - writel(word, (lut_base + i * 4));
> > + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> > + writel(word, (lut_base + idx * 4));
> > + if (!(i % BANK_SIZE) && lut_bits == 12)
> > + writel((i / BANK_SIZE), regs +
> > DISP_GAMMA_BANK);
> > + if (lut_bits == 12)
> > + writel(word1, (lut1_base + idx * 4));
> > }
> > }
> > }
> >
> > +unsigned int mtk_gamma_size(struct device *dev)
>
> unsigned int mtk_gamma_get_lut_size(struct device *dev)
>
> that looks a bit more readable and perfectly explains this function
> :-)
OK, I will fix it.
>
> > +{
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> > +
> > + if (gamma->data)
> > + return gamma->data->lut_size;
> > + else
> > + return 0;
> > +}
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state)
> > {
> > struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> ..snip..
>
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index 2d72cc5ddaba..4c6538a17b88 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs
> > ddp_gamma = {
> > .clk_enable = mtk_gamma_clk_enable,
> > .clk_disable = mtk_gamma_clk_disable,
> > .gamma_set = mtk_gamma_set,
> > + .gamma_size = mtk_gamma_size,
> > .config = mtk_gamma_config,
> > .start = mtk_gamma_start,
> > .stop = mtk_gamma_stop,
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index 2d0052c23dcb..bf0cf7f86010 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> > void (*disable_vblank)(struct device *dev);
> > unsigned int (*supported_rotations)(struct device *dev);
> > unsigned int (*layer_nr)(struct device *dev);
> > + unsigned int (*gamma_size)(struct device *dev);
>
> unsigned int (*gamma_get_lut_size)(struct device *dev);
>
> > int (*layer_check)(struct device *dev,
> > unsigned int idx,
> > struct mtk_plane_state *state);
>
> Regards,
> Angelo
>
>
^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-08-30 8:09 ` zheng-yan.chen
0 siblings, 0 replies; 54+ messages in thread
From: zheng-yan.chen @ 2022-08-30 8:09 UTC (permalink / raw)
To: AngeloGioacchino Del Regno, Chun-Kuang Hu, Rob Herring,
Krzysztof Kozlowski, Matthias Brugger
Cc: dri-devel, linux-mediatek, devicetree, linux-kernel,
linux-arm-kernel, Jason-JH . Lin, Singo Chang,
Project_Global_Chrome_Upstream_Group
On Tue, 2022-08-30 at 09:47 +0200, AngeloGioacchino Del Regno wrote:
> Il 30/08/22 08:39, zheng-yan.chen ha scritto:
> > Since the previous gamma_set_common() function is designed for
> > 9bit-to-10bit conversion, which is not feasible for the
> > 10bit-to-12bit conversion in mt8195.
> >
> > Update the function to fit the need of mt8195.
> >
> > Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> > support for mt8195")
> > Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> > drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> > drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102
> > +++++++++++++++-----
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> > 8 files changed, 85 insertions(+), 32 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > index 0f9d7efb61d7..f563eee3c330 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> > drm_crtc_state *state)
> > struct mtk_disp_aal *aal = dev_get_drvdata(dev);
> >
> > if (aal->data && aal->data->has_gamma)
> > - mtk_gamma_set_common(aal->regs, state, false);
> > + mtk_gamma_set_common(aal->regs, state, dev);
> > }
> >
> > void mtk_aal_start(struct device *dev)
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > index 33e61a136bbc..c1269fce9a66 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> > void mtk_gamma_config(struct device *dev, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> > +unsigned int mtk_gamma_size(struct device *dev);
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state);
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, bool lut_diff);
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, struct device *dev);
> > void mtk_gamma_start(struct device *dev);
> > void mtk_gamma_stop(struct device *dev);
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > index bbd558a036ec..0409e15fceb3 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > @@ -18,18 +18,22 @@
> > #define DISP_GAMMA_EN 0x0000
> > #define GAMMA_EN BIT(0)
> > #define DISP_GAMMA_CFG 0x0020
> > +#define RELAY_MODE BIT(0)
> > #define GAMMA_LUT_EN BIT(1)
> > #define GAMMA_DITHERING BIT(2)
> > #define DISP_GAMMA_SIZE 0x0030
> > +#define DISP_GAMMA_BANK 0x0100
> > #define DISP_GAMMA_LUT 0x0700
> > -
> > -#define LUT_10BIT_MASK 0x03ff
> > -
> > +#define DISP_GAMMA_LUT1 0x0b00
> > +#define TABLE_9BIT_SIZE 512
> > +#define TABLE_10BIT_SIZE 1024
>
> Please remove these two unused definitions.
>
> > +#define BANK_SIZE 256
> > struct mtk_disp_gamma_data {
> > bool has_dither;
> > bool lut_diff;
> > + unsigned int lut_size;
> > + unsigned int lut_bits;
>
> We can reduce the size of this structure by using
>
> u16 lut_size;
> u8 lut_bits;
>
> > };
OK, I will fix it.
> > -
> > /*
> > * struct mtk_disp_gamma - DISP_GAMMA driver structure
> > */
> > @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> > clk_disable_unprepare(gamma->clk);
> > }
> >
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, bool lut_diff)
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, struct device *dev)
> > {
> > - unsigned int i, reg;
> > - struct drm_color_lut *lut;
> > + unsigned int i, reg, idx;
> > void __iomem *lut_base;
> > - u32 word;
> > - u32 diff[3] = {0};
> > + void __iomem *lut1_base;
> > + u32 word, word1;
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> Please reorder these definitions, (columns) longest first, shortest
> last
>
OK, I will fix it.
> >
> > if (state->gamma_lut) {
> > + u32 table_size;
> > + u32 mask;
> > + u32 lut_bits;
> > + u32 shift_bits;
> > + bool lut_diff;
> > + struct drm_color_lut color, color_rec;
> > + struct drm_color_lut *lut = (struct drm_color_lut
> > *)state->gamma_lut;
>
>
> struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
> struct drm_color_lut color, color_rec;
> u32 lut_bits, shift_bits;
> u32 mask, table_size;
> bool lut_diff;
>
> > +
> > + table_size = gamma->data->lut_size;
> > + lut_bits = gamma->data->lut_bits;
> > + lut_diff = gamma->data->lut_diff;
> > + shift_bits = (lut_bits == 12) ? 4 : 6;
> > + mask = GENMASK(lut_bits - 1, 0);
> > reg = readl(regs + DISP_GAMMA_CFG);
> > + reg = reg & ~RELAY_MODE;
> > reg = reg | GAMMA_LUT_EN;
> > writel(reg, regs + DISP_GAMMA_CFG);
> > lut_base = regs + DISP_GAMMA_LUT;
> > - lut = (struct drm_color_lut *)state->gamma_lut->data;
> > - for (i = 0; i < MTK_LUT_SIZE; i++) {
> > -
> > - if (!lut_diff || (i % 2 == 0)) {
> > - word = (((lut[i].red >> 6) &
> > LUT_10BIT_MASK) << 20) +
> > - (((lut[i].green >> 6) &
> > LUT_10BIT_MASK) << 10) +
> > - ((lut[i].blue >> 6) &
> > LUT_10BIT_MASK);
> > + lut1_base = regs + DISP_GAMMA_LUT1;
> > + for (i = 0; i < table_size; i++) {
> > + color.red = (lut[i].red >> shift_bits) & mask;
> > + color.green = (lut[i].green >> shift_bits) &
> > mask;
> > + color.blue = (lut[i].blue >> shift_bits) &
> > mask;
> > + if (lut_diff && (i % 2)) {
> > + word = (lut_bits == 12) ?
> > + (((color.green -
> > color_rec.green) << 12) +
> > + (color.red -
> > color_rec.red))
> > + :
> > + (((color.red -
> > color_rec.red) << 20) +
> > + ((color.green -
> > color_rec.green) << 10) +
> > + (color.blue -
> > color_rec.blue));
> > + word1 = (color.blue - color_rec.blue);
> > } else {
> > - diff[0] = (lut[i].red >> 6) - (lut[i -
> > 1].red >> 6);
> > - diff[1] = (lut[i].green >> 6) - (lut[i
> > - 1].green >> 6);
> > - diff[2] = (lut[i].blue >> 6) - (lut[i -
> > 1].blue >> 6);
> > -
> > - word = ((diff[0] & LUT_10BIT_MASK) <<
> > 20) +
> > - ((diff[1] & LUT_10BIT_MASK) <<
> > 10) +
> > - (diff[2] & LUT_10BIT_MASK);
> > + word = (lut_bits == 12) ?
> > + ((color.green <<
> > 12) + color.red)
> > + :
> > + ((color.red <<
> > 20) +
> > + (color.green <<
> > 10) + color.blue);
> > + word1 = color.blue;
> > + color_rec = color;
> > }
> > - writel(word, (lut_base + i * 4));
> > + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> > + writel(word, (lut_base + idx * 4));
> > + if (!(i % BANK_SIZE) && lut_bits == 12)
> > + writel((i / BANK_SIZE), regs +
> > DISP_GAMMA_BANK);
> > + if (lut_bits == 12)
> > + writel(word1, (lut1_base + idx * 4));
> > }
> > }
> > }
> >
> > +unsigned int mtk_gamma_size(struct device *dev)
>
> unsigned int mtk_gamma_get_lut_size(struct device *dev)
>
> that looks a bit more readable and perfectly explains this function
> :-)
OK, I will fix it.
>
> > +{
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> > +
> > + if (gamma->data)
> > + return gamma->data->lut_size;
> > + else
> > + return 0;
> > +}
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state)
> > {
> > struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> ..snip..
>
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index 2d72cc5ddaba..4c6538a17b88 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs
> > ddp_gamma = {
> > .clk_enable = mtk_gamma_clk_enable,
> > .clk_disable = mtk_gamma_clk_disable,
> > .gamma_set = mtk_gamma_set,
> > + .gamma_size = mtk_gamma_size,
> > .config = mtk_gamma_config,
> > .start = mtk_gamma_start,
> > .stop = mtk_gamma_stop,
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index 2d0052c23dcb..bf0cf7f86010 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> > void (*disable_vblank)(struct device *dev);
> > unsigned int (*supported_rotations)(struct device *dev);
> > unsigned int (*layer_nr)(struct device *dev);
> > + unsigned int (*gamma_size)(struct device *dev);
>
> unsigned int (*gamma_get_lut_size)(struct device *dev);
>
> > int (*layer_check)(struct device *dev,
> > unsigned int idx,
> > struct mtk_plane_state *state);
>
> Regards,
> Angelo
>
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-08-30 8:09 ` zheng-yan.chen
0 siblings, 0 replies; 54+ messages in thread
From: zheng-yan.chen @ 2022-08-30 8:09 UTC (permalink / raw)
To: AngeloGioacchino Del Regno, Chun-Kuang Hu, Rob Herring,
Krzysztof Kozlowski, Matthias Brugger
Cc: dri-devel, linux-mediatek, devicetree, linux-kernel,
linux-arm-kernel, Jason-JH . Lin, Singo Chang,
Project_Global_Chrome_Upstream_Group
On Tue, 2022-08-30 at 09:47 +0200, AngeloGioacchino Del Regno wrote:
> Il 30/08/22 08:39, zheng-yan.chen ha scritto:
> > Since the previous gamma_set_common() function is designed for
> > 9bit-to-10bit conversion, which is not feasible for the
> > 10bit-to-12bit conversion in mt8195.
> >
> > Update the function to fit the need of mt8195.
> >
> > Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> > support for mt8195")
> > Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> > drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> > drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102
> > +++++++++++++++-----
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> > 8 files changed, 85 insertions(+), 32 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > index 0f9d7efb61d7..f563eee3c330 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> > drm_crtc_state *state)
> > struct mtk_disp_aal *aal = dev_get_drvdata(dev);
> >
> > if (aal->data && aal->data->has_gamma)
> > - mtk_gamma_set_common(aal->regs, state, false);
> > + mtk_gamma_set_common(aal->regs, state, dev);
> > }
> >
> > void mtk_aal_start(struct device *dev)
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > index 33e61a136bbc..c1269fce9a66 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> > void mtk_gamma_config(struct device *dev, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> > +unsigned int mtk_gamma_size(struct device *dev);
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state);
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, bool lut_diff);
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, struct device *dev);
> > void mtk_gamma_start(struct device *dev);
> > void mtk_gamma_stop(struct device *dev);
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > index bbd558a036ec..0409e15fceb3 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > @@ -18,18 +18,22 @@
> > #define DISP_GAMMA_EN 0x0000
> > #define GAMMA_EN BIT(0)
> > #define DISP_GAMMA_CFG 0x0020
> > +#define RELAY_MODE BIT(0)
> > #define GAMMA_LUT_EN BIT(1)
> > #define GAMMA_DITHERING BIT(2)
> > #define DISP_GAMMA_SIZE 0x0030
> > +#define DISP_GAMMA_BANK 0x0100
> > #define DISP_GAMMA_LUT 0x0700
> > -
> > -#define LUT_10BIT_MASK 0x03ff
> > -
> > +#define DISP_GAMMA_LUT1 0x0b00
> > +#define TABLE_9BIT_SIZE 512
> > +#define TABLE_10BIT_SIZE 1024
>
> Please remove these two unused definitions.
>
> > +#define BANK_SIZE 256
> > struct mtk_disp_gamma_data {
> > bool has_dither;
> > bool lut_diff;
> > + unsigned int lut_size;
> > + unsigned int lut_bits;
>
> We can reduce the size of this structure by using
>
> u16 lut_size;
> u8 lut_bits;
>
> > };
OK, I will fix it.
> > -
> > /*
> > * struct mtk_disp_gamma - DISP_GAMMA driver structure
> > */
> > @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> > clk_disable_unprepare(gamma->clk);
> > }
> >
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, bool lut_diff)
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state *state, struct device *dev)
> > {
> > - unsigned int i, reg;
> > - struct drm_color_lut *lut;
> > + unsigned int i, reg, idx;
> > void __iomem *lut_base;
> > - u32 word;
> > - u32 diff[3] = {0};
> > + void __iomem *lut1_base;
> > + u32 word, word1;
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> Please reorder these definitions, (columns) longest first, shortest
> last
>
OK, I will fix it.
> >
> > if (state->gamma_lut) {
> > + u32 table_size;
> > + u32 mask;
> > + u32 lut_bits;
> > + u32 shift_bits;
> > + bool lut_diff;
> > + struct drm_color_lut color, color_rec;
> > + struct drm_color_lut *lut = (struct drm_color_lut
> > *)state->gamma_lut;
>
>
> struct drm_color_lut *lut = (struct drm_color_lut *)state->gamma_lut;
> struct drm_color_lut color, color_rec;
> u32 lut_bits, shift_bits;
> u32 mask, table_size;
> bool lut_diff;
>
> > +
> > + table_size = gamma->data->lut_size;
> > + lut_bits = gamma->data->lut_bits;
> > + lut_diff = gamma->data->lut_diff;
> > + shift_bits = (lut_bits == 12) ? 4 : 6;
> > + mask = GENMASK(lut_bits - 1, 0);
> > reg = readl(regs + DISP_GAMMA_CFG);
> > + reg = reg & ~RELAY_MODE;
> > reg = reg | GAMMA_LUT_EN;
> > writel(reg, regs + DISP_GAMMA_CFG);
> > lut_base = regs + DISP_GAMMA_LUT;
> > - lut = (struct drm_color_lut *)state->gamma_lut->data;
> > - for (i = 0; i < MTK_LUT_SIZE; i++) {
> > -
> > - if (!lut_diff || (i % 2 == 0)) {
> > - word = (((lut[i].red >> 6) &
> > LUT_10BIT_MASK) << 20) +
> > - (((lut[i].green >> 6) &
> > LUT_10BIT_MASK) << 10) +
> > - ((lut[i].blue >> 6) &
> > LUT_10BIT_MASK);
> > + lut1_base = regs + DISP_GAMMA_LUT1;
> > + for (i = 0; i < table_size; i++) {
> > + color.red = (lut[i].red >> shift_bits) & mask;
> > + color.green = (lut[i].green >> shift_bits) &
> > mask;
> > + color.blue = (lut[i].blue >> shift_bits) &
> > mask;
> > + if (lut_diff && (i % 2)) {
> > + word = (lut_bits == 12) ?
> > + (((color.green -
> > color_rec.green) << 12) +
> > + (color.red -
> > color_rec.red))
> > + :
> > + (((color.red -
> > color_rec.red) << 20) +
> > + ((color.green -
> > color_rec.green) << 10) +
> > + (color.blue -
> > color_rec.blue));
> > + word1 = (color.blue - color_rec.blue);
> > } else {
> > - diff[0] = (lut[i].red >> 6) - (lut[i -
> > 1].red >> 6);
> > - diff[1] = (lut[i].green >> 6) - (lut[i
> > - 1].green >> 6);
> > - diff[2] = (lut[i].blue >> 6) - (lut[i -
> > 1].blue >> 6);
> > -
> > - word = ((diff[0] & LUT_10BIT_MASK) <<
> > 20) +
> > - ((diff[1] & LUT_10BIT_MASK) <<
> > 10) +
> > - (diff[2] & LUT_10BIT_MASK);
> > + word = (lut_bits == 12) ?
> > + ((color.green <<
> > 12) + color.red)
> > + :
> > + ((color.red <<
> > 20) +
> > + (color.green <<
> > 10) + color.blue);
> > + word1 = color.blue;
> > + color_rec = color;
> > }
> > - writel(word, (lut_base + i * 4));
> > + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> > + writel(word, (lut_base + idx * 4));
> > + if (!(i % BANK_SIZE) && lut_bits == 12)
> > + writel((i / BANK_SIZE), regs +
> > DISP_GAMMA_BANK);
> > + if (lut_bits == 12)
> > + writel(word1, (lut1_base + idx * 4));
> > }
> > }
> > }
> >
> > +unsigned int mtk_gamma_size(struct device *dev)
>
> unsigned int mtk_gamma_get_lut_size(struct device *dev)
>
> that looks a bit more readable and perfectly explains this function
> :-)
OK, I will fix it.
>
> > +{
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> > +
> > + if (gamma->data)
> > + return gamma->data->lut_size;
> > + else
> > + return 0;
> > +}
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state)
> > {
> > struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> ..snip..
>
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index 2d72cc5ddaba..4c6538a17b88 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs
> > ddp_gamma = {
> > .clk_enable = mtk_gamma_clk_enable,
> > .clk_disable = mtk_gamma_clk_disable,
> > .gamma_set = mtk_gamma_set,
> > + .gamma_size = mtk_gamma_size,
> > .config = mtk_gamma_config,
> > .start = mtk_gamma_start,
> > .stop = mtk_gamma_stop,
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index 2d0052c23dcb..bf0cf7f86010 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> > void (*disable_vblank)(struct device *dev);
> > unsigned int (*supported_rotations)(struct device *dev);
> > unsigned int (*layer_nr)(struct device *dev);
> > + unsigned int (*gamma_size)(struct device *dev);
>
> unsigned int (*gamma_get_lut_size)(struct device *dev);
>
> > int (*layer_check)(struct device *dev,
> > unsigned int idx,
> > struct mtk_plane_state *state);
>
> Regards,
> Angelo
>
>
^ permalink raw reply [flat|nested] 54+ messages in thread
* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
2022-08-30 6:39 ` zheng-yan.chen
(?)
@ 2022-08-31 2:56 ` CK Hu
-1 siblings, 0 replies; 54+ messages in thread
From: CK Hu @ 2022-08-31 2:56 UTC (permalink / raw)
To: zheng-yan.chen, Chun-Kuang Hu, Rob Herring, Krzysztof Kozlowski,
Matthias Brugger
Cc: devicetree, Jason-JH . Lin, Singo Chang, linux-kernel, dri-devel,
Project_Global_Chrome_Upstream_Group, linux-mediatek,
linux-arm-kernel
Hi, Zheng-yan:
On Tue, 2022-08-30 at 14:39 +0800, zheng-yan.chen wrote:
> Since the previous gamma_set_common() function is designed for
> 9bit-to-10bit conversion, which is not feasible for the
> 10bit-to-12bit conversion in mt8195.
>
> Update the function to fit the need of mt8195.
>
> Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> support for mt8195")
> Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++---
> --
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> 8 files changed, 85 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> index 0f9d7efb61d7..f563eee3c330 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> drm_crtc_state *state)
> struct mtk_disp_aal *aal = dev_get_drvdata(dev);
>
> if (aal->data && aal->data->has_gamma)
> - mtk_gamma_set_common(aal->regs, state, false);
> + mtk_gamma_set_common(aal->regs, state, dev);
> }
>
> void mtk_aal_start(struct device *dev)
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 33e61a136bbc..c1269fce9a66 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> void mtk_gamma_config(struct device *dev, unsigned int w,
> unsigned int h, unsigned int vrefresh,
> unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +unsigned int mtk_gamma_size(struct device *dev);
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> *state);
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, bool lut_diff);
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, struct device *dev);
> void mtk_gamma_start(struct device *dev);
> void mtk_gamma_stop(struct device *dev);
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index bbd558a036ec..0409e15fceb3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -18,18 +18,22 @@
> #define DISP_GAMMA_EN 0x0000
> #define GAMMA_EN BIT(0)
> #define DISP_GAMMA_CFG 0x0020
> +#define RELAY_MODE BIT(0)
> #define GAMMA_LUT_EN BIT(1)
> #define GAMMA_DITHERING BIT(2)
> #define DISP_GAMMA_SIZE 0x0030
> +#define DISP_GAMMA_BANK 0x0100
> #define DISP_GAMMA_LUT 0x0700
> -
> -#define LUT_10BIT_MASK 0x03ff
> -
> +#define DISP_GAMMA_LUT1 0x0b00
> +#define TABLE_9BIT_SIZE 512
> +#define TABLE_10BIT_SIZE 1024
> +#define BANK_SIZE 256
> struct mtk_disp_gamma_data {
> bool has_dither;
> bool lut_diff;
> + unsigned int lut_size;
> + unsigned int lut_bits;
> };
> -
> /*
> * struct mtk_disp_gamma - DISP_GAMMA driver structure
> */
> @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> clk_disable_unprepare(gamma->clk);
> }
>
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, bool lut_diff)
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, struct device *dev)
> {
> - unsigned int i, reg;
> - struct drm_color_lut *lut;
> + unsigned int i, reg, idx;
> void __iomem *lut_base;
> - u32 word;
> - u32 diff[3] = {0};
> + void __iomem *lut1_base;
> + u32 word, word1;
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> if (state->gamma_lut) {
> + u32 table_size;
> + u32 mask;
> + u32 lut_bits;
> + u32 shift_bits;
> + bool lut_diff;
> + struct drm_color_lut color, color_rec;
> + struct drm_color_lut *lut = (struct drm_color_lut
> *)state->gamma_lut;
> +
> + table_size = gamma->data->lut_size;
> + lut_bits = gamma->data->lut_bits;
> + lut_diff = gamma->data->lut_diff;
> + shift_bits = (lut_bits == 12) ? 4 : 6;
> + mask = GENMASK(lut_bits - 1, 0);
> reg = readl(regs + DISP_GAMMA_CFG);
> + reg = reg & ~RELAY_MODE;
> reg = reg | GAMMA_LUT_EN;
> writel(reg, regs + DISP_GAMMA_CFG);
> lut_base = regs + DISP_GAMMA_LUT;
> - lut = (struct drm_color_lut *)state->gamma_lut->data;
> - for (i = 0; i < MTK_LUT_SIZE; i++) {
> -
> - if (!lut_diff || (i % 2 == 0)) {
> - word = (((lut[i].red >> 6) &
> LUT_10BIT_MASK) << 20) +
> - (((lut[i].green >> 6) &
> LUT_10BIT_MASK) << 10) +
> - ((lut[i].blue >> 6) &
> LUT_10BIT_MASK);
> + lut1_base = regs + DISP_GAMMA_LUT1;
> + for (i = 0; i < table_size; i++) {
> + color.red = (lut[i].red >> shift_bits) & mask;
> + color.green = (lut[i].green >> shift_bits) &
> mask;
> + color.blue = (lut[i].blue >> shift_bits) &
> mask;
> + if (lut_diff && (i % 2)) {
> + word = (lut_bits == 12) ?
> + (((color.green -
> color_rec.green) << 12) +
> + (color.red -
> color_rec.red))
> + :
> + (((color.red -
> color_rec.red) << 20) +
> + ((color.green -
> color_rec.green) << 10) +
> + (color.blue -
> color_rec.blue));
> + word1 = (color.blue - color_rec.blue);
> } else {
> - diff[0] = (lut[i].red >> 6) - (lut[i -
> 1].red >> 6);
> - diff[1] = (lut[i].green >> 6) - (lut[i
> - 1].green >> 6);
> - diff[2] = (lut[i].blue >> 6) - (lut[i -
> 1].blue >> 6);
> -
> - word = ((diff[0] & LUT_10BIT_MASK) <<
> 20) +
> - ((diff[1] & LUT_10BIT_MASK) <<
> 10) +
> - (diff[2] & LUT_10BIT_MASK);
> + word = (lut_bits == 12) ?
> + ((color.green <<
> 12) + color.red)
> + :
> + ((color.red <<
> 20) +
> + (color.green <<
> 10) + color.blue);
> + word1 = color.blue;
> + color_rec = color;
> }
> - writel(word, (lut_base + i * 4));
> + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> + writel(word, (lut_base + idx * 4));
> + if (!(i % BANK_SIZE) && lut_bits == 12)
> + writel((i / BANK_SIZE), regs +
> DISP_GAMMA_BANK);
This patch looks a little messy and mt8195 gamma introduce three
different things. So I would like to separate this patch to 4 patches.
1. Add multiple bank support. For other SoC, bank size is 0 which means
no bank support.
2. Support different lut_size: For other SoC, lut_size = 512
3. Support different lut_bits: For other SoC, lut_bits = 10
4. Add MT8195 gamma support, bank_size = 256, lut_size = 1024, lut_bits
= 12
In this view point, I think the last patch is not a bug-fix but a new
feature, so just drop the Fixes tag.
Regards,
CK
> + if (lut_bits == 12)
> + writel(word1, (lut1_base + idx * 4));
> }
> }
> }
>
> +unsigned int mtk_gamma_size(struct device *dev)
> +{
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> +
> + if (gamma->data)
> + return gamma->data->lut_size;
> + else
> + return 0;
> +}
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
> {
> struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> @@ -95,8 +134,7 @@ void mtk_gamma_set(struct device *dev, struct
> drm_crtc_state *state)
>
> if (gamma->data)
> lut_diff = gamma->data->lut_diff;
> -
> - mtk_gamma_set_common(gamma->regs, state, lut_diff);
> + mtk_gamma_set_common(gamma->regs, state, dev);
> }
>
> void mtk_gamma_config(struct device *dev, unsigned int w,
> @@ -191,10 +229,20 @@ static int mtk_disp_gamma_remove(struct
> platform_device *pdev)
>
> static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
> .has_dither = true,
> + .lut_size = 512,
> + .lut_bits = 10,
> };
>
> static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = {
> .lut_diff = true,
> + .lut_size = 512,
> + .lut_bits = 10,
> +};
> +
> +static const struct mtk_disp_gamma_data mt8195_gamma_driver_data = {
> + .lut_diff = true,
> + .lut_size = 1024,
> + .lut_bits = 12,
> };
>
> static const struct of_device_id mtk_disp_gamma_driver_dt_match[] =
> {
> @@ -202,6 +250,8 @@ static const struct of_device_id
> mtk_disp_gamma_driver_dt_match[] = {
> .data = &mt8173_gamma_driver_data},
> { .compatible = "mediatek,mt8183-disp-gamma",
> .data = &mt8183_gamma_driver_data},
> + { .compatible = "mediatek,mt8195-disp-gamma",
> + .data = &mt8195_gamma_driver_data},
> {},
> };
> MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 42cc7052b050..2a6513259562 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -930,9 +930,8 @@ int mtk_drm_crtc_create(struct drm_device
> *drm_dev,
> mtk_crtc->ddp_comp[i] = comp;
>
> if (comp->funcs) {
> - if (comp->funcs->gamma_set)
> - gamma_lut_size = MTK_LUT_SIZE;
> -
> + if (comp->funcs->gamma_set && comp->funcs-
> >gamma_size)
> + gamma_lut_size = comp->funcs-
> >gamma_size(comp->dev);
> if (comp->funcs->ctm_set)
> has_ctm = true;
> }
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> index cb9a36c48d4f..1799853ef89a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> @@ -10,7 +10,6 @@
> #include "mtk_drm_ddp_comp.h"
> #include "mtk_drm_plane.h"
>
> -#define MTK_LUT_SIZE 512
> #define MTK_MAX_BPC 10
> #define MTK_MIN_BPC 3
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index 2d72cc5ddaba..4c6538a17b88 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs ddp_gamma
> = {
> .clk_enable = mtk_gamma_clk_enable,
> .clk_disable = mtk_gamma_clk_disable,
> .gamma_set = mtk_gamma_set,
> + .gamma_size = mtk_gamma_size,
> .config = mtk_gamma_config,
> .start = mtk_gamma_start,
> .stop = mtk_gamma_stop,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 2d0052c23dcb..bf0cf7f86010 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> void (*disable_vblank)(struct device *dev);
> unsigned int (*supported_rotations)(struct device *dev);
> unsigned int (*layer_nr)(struct device *dev);
> + unsigned int (*gamma_size)(struct device *dev);
> int (*layer_check)(struct device *dev,
> unsigned int idx,
> struct mtk_plane_state *state);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 0e4c77724b05..473766be56e1 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -567,6 +567,8 @@ static const struct of_device_id
> mtk_ddp_comp_dt_ids[] = {
> .data = (void *)MTK_DISP_GAMMA, },
> { .compatible = "mediatek,mt8183-disp-gamma",
> .data = (void *)MTK_DISP_GAMMA, },
> + { .compatible = "mediatek,mt8195-disp-gamma",
> + .data = (void *)MTK_DISP_GAMMA, },
> { .compatible = "mediatek,mt8195-disp-merge",
> .data = (void *)MTK_DISP_MERGE },
> { .compatible = "mediatek,mt2701-disp-mutex",
^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-08-31 2:56 ` CK Hu
0 siblings, 0 replies; 54+ messages in thread
From: CK Hu @ 2022-08-31 2:56 UTC (permalink / raw)
To: zheng-yan.chen, Chun-Kuang Hu, Rob Herring, Krzysztof Kozlowski,
Matthias Brugger
Cc: devicetree, Jason-JH . Lin, Singo Chang, linux-kernel, dri-devel,
Project_Global_Chrome_Upstream_Group, linux-mediatek,
linux-arm-kernel
Hi, Zheng-yan:
On Tue, 2022-08-30 at 14:39 +0800, zheng-yan.chen wrote:
> Since the previous gamma_set_common() function is designed for
> 9bit-to-10bit conversion, which is not feasible for the
> 10bit-to-12bit conversion in mt8195.
>
> Update the function to fit the need of mt8195.
>
> Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> support for mt8195")
> Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++---
> --
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> 8 files changed, 85 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> index 0f9d7efb61d7..f563eee3c330 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> drm_crtc_state *state)
> struct mtk_disp_aal *aal = dev_get_drvdata(dev);
>
> if (aal->data && aal->data->has_gamma)
> - mtk_gamma_set_common(aal->regs, state, false);
> + mtk_gamma_set_common(aal->regs, state, dev);
> }
>
> void mtk_aal_start(struct device *dev)
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 33e61a136bbc..c1269fce9a66 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> void mtk_gamma_config(struct device *dev, unsigned int w,
> unsigned int h, unsigned int vrefresh,
> unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +unsigned int mtk_gamma_size(struct device *dev);
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> *state);
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, bool lut_diff);
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, struct device *dev);
> void mtk_gamma_start(struct device *dev);
> void mtk_gamma_stop(struct device *dev);
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index bbd558a036ec..0409e15fceb3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -18,18 +18,22 @@
> #define DISP_GAMMA_EN 0x0000
> #define GAMMA_EN BIT(0)
> #define DISP_GAMMA_CFG 0x0020
> +#define RELAY_MODE BIT(0)
> #define GAMMA_LUT_EN BIT(1)
> #define GAMMA_DITHERING BIT(2)
> #define DISP_GAMMA_SIZE 0x0030
> +#define DISP_GAMMA_BANK 0x0100
> #define DISP_GAMMA_LUT 0x0700
> -
> -#define LUT_10BIT_MASK 0x03ff
> -
> +#define DISP_GAMMA_LUT1 0x0b00
> +#define TABLE_9BIT_SIZE 512
> +#define TABLE_10BIT_SIZE 1024
> +#define BANK_SIZE 256
> struct mtk_disp_gamma_data {
> bool has_dither;
> bool lut_diff;
> + unsigned int lut_size;
> + unsigned int lut_bits;
> };
> -
> /*
> * struct mtk_disp_gamma - DISP_GAMMA driver structure
> */
> @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> clk_disable_unprepare(gamma->clk);
> }
>
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, bool lut_diff)
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, struct device *dev)
> {
> - unsigned int i, reg;
> - struct drm_color_lut *lut;
> + unsigned int i, reg, idx;
> void __iomem *lut_base;
> - u32 word;
> - u32 diff[3] = {0};
> + void __iomem *lut1_base;
> + u32 word, word1;
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> if (state->gamma_lut) {
> + u32 table_size;
> + u32 mask;
> + u32 lut_bits;
> + u32 shift_bits;
> + bool lut_diff;
> + struct drm_color_lut color, color_rec;
> + struct drm_color_lut *lut = (struct drm_color_lut
> *)state->gamma_lut;
> +
> + table_size = gamma->data->lut_size;
> + lut_bits = gamma->data->lut_bits;
> + lut_diff = gamma->data->lut_diff;
> + shift_bits = (lut_bits == 12) ? 4 : 6;
> + mask = GENMASK(lut_bits - 1, 0);
> reg = readl(regs + DISP_GAMMA_CFG);
> + reg = reg & ~RELAY_MODE;
> reg = reg | GAMMA_LUT_EN;
> writel(reg, regs + DISP_GAMMA_CFG);
> lut_base = regs + DISP_GAMMA_LUT;
> - lut = (struct drm_color_lut *)state->gamma_lut->data;
> - for (i = 0; i < MTK_LUT_SIZE; i++) {
> -
> - if (!lut_diff || (i % 2 == 0)) {
> - word = (((lut[i].red >> 6) &
> LUT_10BIT_MASK) << 20) +
> - (((lut[i].green >> 6) &
> LUT_10BIT_MASK) << 10) +
> - ((lut[i].blue >> 6) &
> LUT_10BIT_MASK);
> + lut1_base = regs + DISP_GAMMA_LUT1;
> + for (i = 0; i < table_size; i++) {
> + color.red = (lut[i].red >> shift_bits) & mask;
> + color.green = (lut[i].green >> shift_bits) &
> mask;
> + color.blue = (lut[i].blue >> shift_bits) &
> mask;
> + if (lut_diff && (i % 2)) {
> + word = (lut_bits == 12) ?
> + (((color.green -
> color_rec.green) << 12) +
> + (color.red -
> color_rec.red))
> + :
> + (((color.red -
> color_rec.red) << 20) +
> + ((color.green -
> color_rec.green) << 10) +
> + (color.blue -
> color_rec.blue));
> + word1 = (color.blue - color_rec.blue);
> } else {
> - diff[0] = (lut[i].red >> 6) - (lut[i -
> 1].red >> 6);
> - diff[1] = (lut[i].green >> 6) - (lut[i
> - 1].green >> 6);
> - diff[2] = (lut[i].blue >> 6) - (lut[i -
> 1].blue >> 6);
> -
> - word = ((diff[0] & LUT_10BIT_MASK) <<
> 20) +
> - ((diff[1] & LUT_10BIT_MASK) <<
> 10) +
> - (diff[2] & LUT_10BIT_MASK);
> + word = (lut_bits == 12) ?
> + ((color.green <<
> 12) + color.red)
> + :
> + ((color.red <<
> 20) +
> + (color.green <<
> 10) + color.blue);
> + word1 = color.blue;
> + color_rec = color;
> }
> - writel(word, (lut_base + i * 4));
> + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> + writel(word, (lut_base + idx * 4));
> + if (!(i % BANK_SIZE) && lut_bits == 12)
> + writel((i / BANK_SIZE), regs +
> DISP_GAMMA_BANK);
This patch looks a little messy and mt8195 gamma introduce three
different things. So I would like to separate this patch to 4 patches.
1. Add multiple bank support. For other SoC, bank size is 0 which means
no bank support.
2. Support different lut_size: For other SoC, lut_size = 512
3. Support different lut_bits: For other SoC, lut_bits = 10
4. Add MT8195 gamma support, bank_size = 256, lut_size = 1024, lut_bits
= 12
In this view point, I think the last patch is not a bug-fix but a new
feature, so just drop the Fixes tag.
Regards,
CK
> + if (lut_bits == 12)
> + writel(word1, (lut1_base + idx * 4));
> }
> }
> }
>
> +unsigned int mtk_gamma_size(struct device *dev)
> +{
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> +
> + if (gamma->data)
> + return gamma->data->lut_size;
> + else
> + return 0;
> +}
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
> {
> struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> @@ -95,8 +134,7 @@ void mtk_gamma_set(struct device *dev, struct
> drm_crtc_state *state)
>
> if (gamma->data)
> lut_diff = gamma->data->lut_diff;
> -
> - mtk_gamma_set_common(gamma->regs, state, lut_diff);
> + mtk_gamma_set_common(gamma->regs, state, dev);
> }
>
> void mtk_gamma_config(struct device *dev, unsigned int w,
> @@ -191,10 +229,20 @@ static int mtk_disp_gamma_remove(struct
> platform_device *pdev)
>
> static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
> .has_dither = true,
> + .lut_size = 512,
> + .lut_bits = 10,
> };
>
> static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = {
> .lut_diff = true,
> + .lut_size = 512,
> + .lut_bits = 10,
> +};
> +
> +static const struct mtk_disp_gamma_data mt8195_gamma_driver_data = {
> + .lut_diff = true,
> + .lut_size = 1024,
> + .lut_bits = 12,
> };
>
> static const struct of_device_id mtk_disp_gamma_driver_dt_match[] =
> {
> @@ -202,6 +250,8 @@ static const struct of_device_id
> mtk_disp_gamma_driver_dt_match[] = {
> .data = &mt8173_gamma_driver_data},
> { .compatible = "mediatek,mt8183-disp-gamma",
> .data = &mt8183_gamma_driver_data},
> + { .compatible = "mediatek,mt8195-disp-gamma",
> + .data = &mt8195_gamma_driver_data},
> {},
> };
> MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 42cc7052b050..2a6513259562 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -930,9 +930,8 @@ int mtk_drm_crtc_create(struct drm_device
> *drm_dev,
> mtk_crtc->ddp_comp[i] = comp;
>
> if (comp->funcs) {
> - if (comp->funcs->gamma_set)
> - gamma_lut_size = MTK_LUT_SIZE;
> -
> + if (comp->funcs->gamma_set && comp->funcs-
> >gamma_size)
> + gamma_lut_size = comp->funcs-
> >gamma_size(comp->dev);
> if (comp->funcs->ctm_set)
> has_ctm = true;
> }
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> index cb9a36c48d4f..1799853ef89a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> @@ -10,7 +10,6 @@
> #include "mtk_drm_ddp_comp.h"
> #include "mtk_drm_plane.h"
>
> -#define MTK_LUT_SIZE 512
> #define MTK_MAX_BPC 10
> #define MTK_MIN_BPC 3
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index 2d72cc5ddaba..4c6538a17b88 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs ddp_gamma
> = {
> .clk_enable = mtk_gamma_clk_enable,
> .clk_disable = mtk_gamma_clk_disable,
> .gamma_set = mtk_gamma_set,
> + .gamma_size = mtk_gamma_size,
> .config = mtk_gamma_config,
> .start = mtk_gamma_start,
> .stop = mtk_gamma_stop,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 2d0052c23dcb..bf0cf7f86010 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> void (*disable_vblank)(struct device *dev);
> unsigned int (*supported_rotations)(struct device *dev);
> unsigned int (*layer_nr)(struct device *dev);
> + unsigned int (*gamma_size)(struct device *dev);
> int (*layer_check)(struct device *dev,
> unsigned int idx,
> struct mtk_plane_state *state);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 0e4c77724b05..473766be56e1 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -567,6 +567,8 @@ static const struct of_device_id
> mtk_ddp_comp_dt_ids[] = {
> .data = (void *)MTK_DISP_GAMMA, },
> { .compatible = "mediatek,mt8183-disp-gamma",
> .data = (void *)MTK_DISP_GAMMA, },
> + { .compatible = "mediatek,mt8195-disp-gamma",
> + .data = (void *)MTK_DISP_GAMMA, },
> { .compatible = "mediatek,mt8195-disp-merge",
> .data = (void *)MTK_DISP_MERGE },
> { .compatible = "mediatek,mt2701-disp-mutex",
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^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-08-31 2:56 ` CK Hu
0 siblings, 0 replies; 54+ messages in thread
From: CK Hu @ 2022-08-31 2:56 UTC (permalink / raw)
To: zheng-yan.chen, Chun-Kuang Hu, Rob Herring, Krzysztof Kozlowski,
Matthias Brugger
Cc: devicetree, Jason-JH . Lin, Singo Chang, linux-kernel, dri-devel,
Project_Global_Chrome_Upstream_Group, linux-mediatek,
linux-arm-kernel
Hi, Zheng-yan:
On Tue, 2022-08-30 at 14:39 +0800, zheng-yan.chen wrote:
> Since the previous gamma_set_common() function is designed for
> 9bit-to-10bit conversion, which is not feasible for the
> 10bit-to-12bit conversion in mt8195.
>
> Update the function to fit the need of mt8195.
>
> Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> support for mt8195")
> Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++---
> --
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> 8 files changed, 85 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> index 0f9d7efb61d7..f563eee3c330 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> drm_crtc_state *state)
> struct mtk_disp_aal *aal = dev_get_drvdata(dev);
>
> if (aal->data && aal->data->has_gamma)
> - mtk_gamma_set_common(aal->regs, state, false);
> + mtk_gamma_set_common(aal->regs, state, dev);
> }
>
> void mtk_aal_start(struct device *dev)
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 33e61a136bbc..c1269fce9a66 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> void mtk_gamma_config(struct device *dev, unsigned int w,
> unsigned int h, unsigned int vrefresh,
> unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +unsigned int mtk_gamma_size(struct device *dev);
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> *state);
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, bool lut_diff);
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, struct device *dev);
> void mtk_gamma_start(struct device *dev);
> void mtk_gamma_stop(struct device *dev);
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index bbd558a036ec..0409e15fceb3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -18,18 +18,22 @@
> #define DISP_GAMMA_EN 0x0000
> #define GAMMA_EN BIT(0)
> #define DISP_GAMMA_CFG 0x0020
> +#define RELAY_MODE BIT(0)
> #define GAMMA_LUT_EN BIT(1)
> #define GAMMA_DITHERING BIT(2)
> #define DISP_GAMMA_SIZE 0x0030
> +#define DISP_GAMMA_BANK 0x0100
> #define DISP_GAMMA_LUT 0x0700
> -
> -#define LUT_10BIT_MASK 0x03ff
> -
> +#define DISP_GAMMA_LUT1 0x0b00
> +#define TABLE_9BIT_SIZE 512
> +#define TABLE_10BIT_SIZE 1024
> +#define BANK_SIZE 256
> struct mtk_disp_gamma_data {
> bool has_dither;
> bool lut_diff;
> + unsigned int lut_size;
> + unsigned int lut_bits;
> };
> -
> /*
> * struct mtk_disp_gamma - DISP_GAMMA driver structure
> */
> @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> clk_disable_unprepare(gamma->clk);
> }
>
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, bool lut_diff)
> +void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, struct device *dev)
> {
> - unsigned int i, reg;
> - struct drm_color_lut *lut;
> + unsigned int i, reg, idx;
> void __iomem *lut_base;
> - u32 word;
> - u32 diff[3] = {0};
> + void __iomem *lut1_base;
> + u32 word, word1;
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
>
> if (state->gamma_lut) {
> + u32 table_size;
> + u32 mask;
> + u32 lut_bits;
> + u32 shift_bits;
> + bool lut_diff;
> + struct drm_color_lut color, color_rec;
> + struct drm_color_lut *lut = (struct drm_color_lut
> *)state->gamma_lut;
> +
> + table_size = gamma->data->lut_size;
> + lut_bits = gamma->data->lut_bits;
> + lut_diff = gamma->data->lut_diff;
> + shift_bits = (lut_bits == 12) ? 4 : 6;
> + mask = GENMASK(lut_bits - 1, 0);
> reg = readl(regs + DISP_GAMMA_CFG);
> + reg = reg & ~RELAY_MODE;
> reg = reg | GAMMA_LUT_EN;
> writel(reg, regs + DISP_GAMMA_CFG);
> lut_base = regs + DISP_GAMMA_LUT;
> - lut = (struct drm_color_lut *)state->gamma_lut->data;
> - for (i = 0; i < MTK_LUT_SIZE; i++) {
> -
> - if (!lut_diff || (i % 2 == 0)) {
> - word = (((lut[i].red >> 6) &
> LUT_10BIT_MASK) << 20) +
> - (((lut[i].green >> 6) &
> LUT_10BIT_MASK) << 10) +
> - ((lut[i].blue >> 6) &
> LUT_10BIT_MASK);
> + lut1_base = regs + DISP_GAMMA_LUT1;
> + for (i = 0; i < table_size; i++) {
> + color.red = (lut[i].red >> shift_bits) & mask;
> + color.green = (lut[i].green >> shift_bits) &
> mask;
> + color.blue = (lut[i].blue >> shift_bits) &
> mask;
> + if (lut_diff && (i % 2)) {
> + word = (lut_bits == 12) ?
> + (((color.green -
> color_rec.green) << 12) +
> + (color.red -
> color_rec.red))
> + :
> + (((color.red -
> color_rec.red) << 20) +
> + ((color.green -
> color_rec.green) << 10) +
> + (color.blue -
> color_rec.blue));
> + word1 = (color.blue - color_rec.blue);
> } else {
> - diff[0] = (lut[i].red >> 6) - (lut[i -
> 1].red >> 6);
> - diff[1] = (lut[i].green >> 6) - (lut[i
> - 1].green >> 6);
> - diff[2] = (lut[i].blue >> 6) - (lut[i -
> 1].blue >> 6);
> -
> - word = ((diff[0] & LUT_10BIT_MASK) <<
> 20) +
> - ((diff[1] & LUT_10BIT_MASK) <<
> 10) +
> - (diff[2] & LUT_10BIT_MASK);
> + word = (lut_bits == 12) ?
> + ((color.green <<
> 12) + color.red)
> + :
> + ((color.red <<
> 20) +
> + (color.green <<
> 10) + color.blue);
> + word1 = color.blue;
> + color_rec = color;
> }
> - writel(word, (lut_base + i * 4));
> + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> + writel(word, (lut_base + idx * 4));
> + if (!(i % BANK_SIZE) && lut_bits == 12)
> + writel((i / BANK_SIZE), regs +
> DISP_GAMMA_BANK);
This patch looks a little messy and mt8195 gamma introduce three
different things. So I would like to separate this patch to 4 patches.
1. Add multiple bank support. For other SoC, bank size is 0 which means
no bank support.
2. Support different lut_size: For other SoC, lut_size = 512
3. Support different lut_bits: For other SoC, lut_bits = 10
4. Add MT8195 gamma support, bank_size = 256, lut_size = 1024, lut_bits
= 12
In this view point, I think the last patch is not a bug-fix but a new
feature, so just drop the Fixes tag.
Regards,
CK
> + if (lut_bits == 12)
> + writel(word1, (lut1_base + idx * 4));
> }
> }
> }
>
> +unsigned int mtk_gamma_size(struct device *dev)
> +{
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> +
> + if (gamma->data)
> + return gamma->data->lut_size;
> + else
> + return 0;
> +}
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
> {
> struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> @@ -95,8 +134,7 @@ void mtk_gamma_set(struct device *dev, struct
> drm_crtc_state *state)
>
> if (gamma->data)
> lut_diff = gamma->data->lut_diff;
> -
> - mtk_gamma_set_common(gamma->regs, state, lut_diff);
> + mtk_gamma_set_common(gamma->regs, state, dev);
> }
>
> void mtk_gamma_config(struct device *dev, unsigned int w,
> @@ -191,10 +229,20 @@ static int mtk_disp_gamma_remove(struct
> platform_device *pdev)
>
> static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
> .has_dither = true,
> + .lut_size = 512,
> + .lut_bits = 10,
> };
>
> static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = {
> .lut_diff = true,
> + .lut_size = 512,
> + .lut_bits = 10,
> +};
> +
> +static const struct mtk_disp_gamma_data mt8195_gamma_driver_data = {
> + .lut_diff = true,
> + .lut_size = 1024,
> + .lut_bits = 12,
> };
>
> static const struct of_device_id mtk_disp_gamma_driver_dt_match[] =
> {
> @@ -202,6 +250,8 @@ static const struct of_device_id
> mtk_disp_gamma_driver_dt_match[] = {
> .data = &mt8173_gamma_driver_data},
> { .compatible = "mediatek,mt8183-disp-gamma",
> .data = &mt8183_gamma_driver_data},
> + { .compatible = "mediatek,mt8195-disp-gamma",
> + .data = &mt8195_gamma_driver_data},
> {},
> };
> MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 42cc7052b050..2a6513259562 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -930,9 +930,8 @@ int mtk_drm_crtc_create(struct drm_device
> *drm_dev,
> mtk_crtc->ddp_comp[i] = comp;
>
> if (comp->funcs) {
> - if (comp->funcs->gamma_set)
> - gamma_lut_size = MTK_LUT_SIZE;
> -
> + if (comp->funcs->gamma_set && comp->funcs-
> >gamma_size)
> + gamma_lut_size = comp->funcs-
> >gamma_size(comp->dev);
> if (comp->funcs->ctm_set)
> has_ctm = true;
> }
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> index cb9a36c48d4f..1799853ef89a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> @@ -10,7 +10,6 @@
> #include "mtk_drm_ddp_comp.h"
> #include "mtk_drm_plane.h"
>
> -#define MTK_LUT_SIZE 512
> #define MTK_MAX_BPC 10
> #define MTK_MIN_BPC 3
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index 2d72cc5ddaba..4c6538a17b88 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -323,6 +323,7 @@ static const struct mtk_ddp_comp_funcs ddp_gamma
> = {
> .clk_enable = mtk_gamma_clk_enable,
> .clk_disable = mtk_gamma_clk_disable,
> .gamma_set = mtk_gamma_set,
> + .gamma_size = mtk_gamma_size,
> .config = mtk_gamma_config,
> .start = mtk_gamma_start,
> .stop = mtk_gamma_stop,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 2d0052c23dcb..bf0cf7f86010 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -59,6 +59,7 @@ struct mtk_ddp_comp_funcs {
> void (*disable_vblank)(struct device *dev);
> unsigned int (*supported_rotations)(struct device *dev);
> unsigned int (*layer_nr)(struct device *dev);
> + unsigned int (*gamma_size)(struct device *dev);
> int (*layer_check)(struct device *dev,
> unsigned int idx,
> struct mtk_plane_state *state);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 0e4c77724b05..473766be56e1 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -567,6 +567,8 @@ static const struct of_device_id
> mtk_ddp_comp_dt_ids[] = {
> .data = (void *)MTK_DISP_GAMMA, },
> { .compatible = "mediatek,mt8183-disp-gamma",
> .data = (void *)MTK_DISP_GAMMA, },
> + { .compatible = "mediatek,mt8195-disp-gamma",
> + .data = (void *)MTK_DISP_GAMMA, },
> { .compatible = "mediatek,mt8195-disp-merge",
> .data = (void *)MTK_DISP_MERGE },
> { .compatible = "mediatek,mt2701-disp-mutex",
^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
2022-08-31 2:56 ` CK Hu
(?)
@ 2022-09-10 16:25 ` Jason-JH Lin
-1 siblings, 0 replies; 54+ messages in thread
From: Jason-JH Lin @ 2022-09-10 16:25 UTC (permalink / raw)
To: CK Hu, zheng-yan.chen, Chun-Kuang Hu, Rob Herring,
Krzysztof Kozlowski, Matthias Brugger
Cc: devicetree, Singo Chang, linux-kernel, dri-devel,
Project_Global_Chrome_Upstream_Group, linux-mediatek,
linux-arm-kernel
On Wed, 2022-08-31 at 10:56 +0800, CK Hu wrote:
> Hi, Zheng-yan:
>
> On Tue, 2022-08-30 at 14:39 +0800, zheng-yan.chen wrote:
> > Since the previous gamma_set_common() function is designed for
> > 9bit-to-10bit conversion, which is not feasible for the
> > 10bit-to-12bit conversion in mt8195.
> >
> > Update the function to fit the need of mt8195.
> >
> > Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> > support for mt8195")
> > Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> > drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> > drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++-
> > --
> > --
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> > 8 files changed, 85 insertions(+), 32 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > index 0f9d7efb61d7..f563eee3c330 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> > drm_crtc_state *state)
> > struct mtk_disp_aal *aal = dev_get_drvdata(dev);
> >
> > if (aal->data && aal->data->has_gamma)
> > - mtk_gamma_set_common(aal->regs, state, false);
> > + mtk_gamma_set_common(aal->regs, state, dev);
> > }
> >
> > void mtk_aal_start(struct device *dev)
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > index 33e61a136bbc..c1269fce9a66 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> > void mtk_gamma_config(struct device *dev, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> > +unsigned int mtk_gamma_size(struct device *dev);
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state);
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, bool lut_diff);
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, struct device *dev);
> > void mtk_gamma_start(struct device *dev);
> > void mtk_gamma_stop(struct device *dev);
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > index bbd558a036ec..0409e15fceb3 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > @@ -18,18 +18,22 @@
> > #define DISP_GAMMA_EN 0x0000
> > #define GAMMA_EN BIT(0)
> > #define DISP_GAMMA_CFG 0x0020
> > +#define RELAY_MODE BIT(0)
> > #define GAMMA_LUT_EN BIT(1)
> > #define GAMMA_DITHERING BIT(2)
> > #define DISP_GAMMA_SIZE 0x0030
> > +#define DISP_GAMMA_BANK 0x0100
> > #define DISP_GAMMA_LUT 0x0700
> > -
> > -#define LUT_10BIT_MASK 0x03ff
> > -
> > +#define DISP_GAMMA_LUT1 0x0b00
> > +#define TABLE_9BIT_SIZE 512
> > +#define TABLE_10BIT_SIZE 1024
> > +#define BANK_SIZE 256
> > struct mtk_disp_gamma_data {
> > bool has_dither;
> > bool lut_diff;
> > + unsigned int lut_size;
> > + unsigned int lut_bits;
> > };
> > -
> > /*
> > * struct mtk_disp_gamma - DISP_GAMMA driver structure
> > */
> > @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> > clk_disable_unprepare(gamma->clk);
> > }
> >
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, bool lut_diff)
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, struct device *dev)
> > {
> > - unsigned int i, reg;
> > - struct drm_color_lut *lut;
> > + unsigned int i, reg, idx;
> > void __iomem *lut_base;
> > - u32 word;
> > - u32 diff[3] = {0};
> > + void __iomem *lut1_base;
> > + u32 word, word1;
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> >
> > if (state->gamma_lut) {
> > + u32 table_size;
> > + u32 mask;
> > + u32 lut_bits;
> > + u32 shift_bits;
> > + bool lut_diff;
> > + struct drm_color_lut color, color_rec;
> > + struct drm_color_lut *lut = (struct drm_color_lut
> > *)state->gamma_lut;
> > +
> > + table_size = gamma->data->lut_size;
> > + lut_bits = gamma->data->lut_bits;
> > + lut_diff = gamma->data->lut_diff;
> > + shift_bits = (lut_bits == 12) ? 4 : 6;
> > + mask = GENMASK(lut_bits - 1, 0);
> > reg = readl(regs + DISP_GAMMA_CFG);
> > + reg = reg & ~RELAY_MODE;
> > reg = reg | GAMMA_LUT_EN;
> > writel(reg, regs + DISP_GAMMA_CFG);
> > lut_base = regs + DISP_GAMMA_LUT;
> > - lut = (struct drm_color_lut *)state->gamma_lut->data;
> > - for (i = 0; i < MTK_LUT_SIZE; i++) {
> > -
> > - if (!lut_diff || (i % 2 == 0)) {
> > - word = (((lut[i].red >> 6) &
> > LUT_10BIT_MASK) << 20) +
> > - (((lut[i].green >> 6) &
> > LUT_10BIT_MASK) << 10) +
> > - ((lut[i].blue >> 6) &
> > LUT_10BIT_MASK);
> > + lut1_base = regs + DISP_GAMMA_LUT1;
> > + for (i = 0; i < table_size; i++) {
> > + color.red = (lut[i].red >> shift_bits) & mask;
> > + color.green = (lut[i].green >> shift_bits) &
> > mask;
> > + color.blue = (lut[i].blue >> shift_bits) &
> > mask;
> > + if (lut_diff && (i % 2)) {
> > + word = (lut_bits == 12) ?
> > + (((color.green -
> > color_rec.green) << 12) +
> > + (color.red -
> > color_rec.red))
> > + :
> > + (((color.red -
> > color_rec.red) << 20) +
> > + ((color.green -
> > color_rec.green) << 10) +
> > + (color.blue -
> > color_rec.blue));
> > + word1 = (color.blue - color_rec.blue);
> > } else {
> > - diff[0] = (lut[i].red >> 6) - (lut[i -
> > 1].red >> 6);
> > - diff[1] = (lut[i].green >> 6) - (lut[i
> > - 1].green >> 6);
> > - diff[2] = (lut[i].blue >> 6) - (lut[i -
> > 1].blue >> 6);
> > -
> > - word = ((diff[0] & LUT_10BIT_MASK) <<
> > 20) +
> > - ((diff[1] & LUT_10BIT_MASK) <<
> > 10) +
> > - (diff[2] & LUT_10BIT_MASK);
> > + word = (lut_bits == 12) ?
> > + ((color.green <<
> > 12) + color.red)
> > + :
> > + ((color.red <<
> > 20) +
> > + (color.green <<
> > 10) + color.blue);
> > + word1 = color.blue;
> > + color_rec = color;
> > }
> > - writel(word, (lut_base + i * 4));
> > + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> > + writel(word, (lut_base + idx * 4));
> > + if (!(i % BANK_SIZE) && lut_bits == 12)
> > + writel((i / BANK_SIZE), regs +
> > DISP_GAMMA_BANK);
>
> This patch looks a little messy and mt8195 gamma introduce three
> different things. So I would like to separate this patch to 4
> patches.
>
> 1. Add multiple bank support. For other SoC, bank size is 0 which
> means
> no bank support.
> 2. Support different lut_size: For other SoC, lut_size = 512
> 3. Support different lut_bits: For other SoC, lut_bits = 10
> 4. Add MT8195 gamma support, bank_size = 256, lut_size = 1024,
> lut_bits
> = 12
>
> In this view point, I think the last patch is not a bug-fix but a new
> feature, so just drop the Fixes tag.
>
> Regards,
> CK
Hi CK,
Thanks for the reviews.
I'll help Zheng-yan finish this series.
I'll separate this one patch to the patches below:
drm/mediatek: Adjust mtk_drm_gamma_set_common parameters
drm/mediatek: Add gamma support different lut_size for other SoC
drm/mediatek: Add gamma support different lut_bits for other SoC
drm/mediatek: Add gamma support different bank_size for other SoC
drm/mediatek: Add gamma lut support for mt8195
drm/mediatek: Add clear RELAY_MODE bit to set gamma
Regrads,
Jason-JH.Lin
^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-09-10 16:25 ` Jason-JH Lin
0 siblings, 0 replies; 54+ messages in thread
From: Jason-JH Lin @ 2022-09-10 16:25 UTC (permalink / raw)
To: CK Hu, zheng-yan.chen, Chun-Kuang Hu, Rob Herring,
Krzysztof Kozlowski, Matthias Brugger
Cc: devicetree, Singo Chang, linux-kernel, dri-devel,
Project_Global_Chrome_Upstream_Group, linux-mediatek,
linux-arm-kernel
On Wed, 2022-08-31 at 10:56 +0800, CK Hu wrote:
> Hi, Zheng-yan:
>
> On Tue, 2022-08-30 at 14:39 +0800, zheng-yan.chen wrote:
> > Since the previous gamma_set_common() function is designed for
> > 9bit-to-10bit conversion, which is not feasible for the
> > 10bit-to-12bit conversion in mt8195.
> >
> > Update the function to fit the need of mt8195.
> >
> > Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> > support for mt8195")
> > Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> > drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> > drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++-
> > --
> > --
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> > 8 files changed, 85 insertions(+), 32 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > index 0f9d7efb61d7..f563eee3c330 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> > drm_crtc_state *state)
> > struct mtk_disp_aal *aal = dev_get_drvdata(dev);
> >
> > if (aal->data && aal->data->has_gamma)
> > - mtk_gamma_set_common(aal->regs, state, false);
> > + mtk_gamma_set_common(aal->regs, state, dev);
> > }
> >
> > void mtk_aal_start(struct device *dev)
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > index 33e61a136bbc..c1269fce9a66 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> > void mtk_gamma_config(struct device *dev, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> > +unsigned int mtk_gamma_size(struct device *dev);
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state);
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, bool lut_diff);
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, struct device *dev);
> > void mtk_gamma_start(struct device *dev);
> > void mtk_gamma_stop(struct device *dev);
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > index bbd558a036ec..0409e15fceb3 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > @@ -18,18 +18,22 @@
> > #define DISP_GAMMA_EN 0x0000
> > #define GAMMA_EN BIT(0)
> > #define DISP_GAMMA_CFG 0x0020
> > +#define RELAY_MODE BIT(0)
> > #define GAMMA_LUT_EN BIT(1)
> > #define GAMMA_DITHERING BIT(2)
> > #define DISP_GAMMA_SIZE 0x0030
> > +#define DISP_GAMMA_BANK 0x0100
> > #define DISP_GAMMA_LUT 0x0700
> > -
> > -#define LUT_10BIT_MASK 0x03ff
> > -
> > +#define DISP_GAMMA_LUT1 0x0b00
> > +#define TABLE_9BIT_SIZE 512
> > +#define TABLE_10BIT_SIZE 1024
> > +#define BANK_SIZE 256
> > struct mtk_disp_gamma_data {
> > bool has_dither;
> > bool lut_diff;
> > + unsigned int lut_size;
> > + unsigned int lut_bits;
> > };
> > -
> > /*
> > * struct mtk_disp_gamma - DISP_GAMMA driver structure
> > */
> > @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> > clk_disable_unprepare(gamma->clk);
> > }
> >
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, bool lut_diff)
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, struct device *dev)
> > {
> > - unsigned int i, reg;
> > - struct drm_color_lut *lut;
> > + unsigned int i, reg, idx;
> > void __iomem *lut_base;
> > - u32 word;
> > - u32 diff[3] = {0};
> > + void __iomem *lut1_base;
> > + u32 word, word1;
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> >
> > if (state->gamma_lut) {
> > + u32 table_size;
> > + u32 mask;
> > + u32 lut_bits;
> > + u32 shift_bits;
> > + bool lut_diff;
> > + struct drm_color_lut color, color_rec;
> > + struct drm_color_lut *lut = (struct drm_color_lut
> > *)state->gamma_lut;
> > +
> > + table_size = gamma->data->lut_size;
> > + lut_bits = gamma->data->lut_bits;
> > + lut_diff = gamma->data->lut_diff;
> > + shift_bits = (lut_bits == 12) ? 4 : 6;
> > + mask = GENMASK(lut_bits - 1, 0);
> > reg = readl(regs + DISP_GAMMA_CFG);
> > + reg = reg & ~RELAY_MODE;
> > reg = reg | GAMMA_LUT_EN;
> > writel(reg, regs + DISP_GAMMA_CFG);
> > lut_base = regs + DISP_GAMMA_LUT;
> > - lut = (struct drm_color_lut *)state->gamma_lut->data;
> > - for (i = 0; i < MTK_LUT_SIZE; i++) {
> > -
> > - if (!lut_diff || (i % 2 == 0)) {
> > - word = (((lut[i].red >> 6) &
> > LUT_10BIT_MASK) << 20) +
> > - (((lut[i].green >> 6) &
> > LUT_10BIT_MASK) << 10) +
> > - ((lut[i].blue >> 6) &
> > LUT_10BIT_MASK);
> > + lut1_base = regs + DISP_GAMMA_LUT1;
> > + for (i = 0; i < table_size; i++) {
> > + color.red = (lut[i].red >> shift_bits) & mask;
> > + color.green = (lut[i].green >> shift_bits) &
> > mask;
> > + color.blue = (lut[i].blue >> shift_bits) &
> > mask;
> > + if (lut_diff && (i % 2)) {
> > + word = (lut_bits == 12) ?
> > + (((color.green -
> > color_rec.green) << 12) +
> > + (color.red -
> > color_rec.red))
> > + :
> > + (((color.red -
> > color_rec.red) << 20) +
> > + ((color.green -
> > color_rec.green) << 10) +
> > + (color.blue -
> > color_rec.blue));
> > + word1 = (color.blue - color_rec.blue);
> > } else {
> > - diff[0] = (lut[i].red >> 6) - (lut[i -
> > 1].red >> 6);
> > - diff[1] = (lut[i].green >> 6) - (lut[i
> > - 1].green >> 6);
> > - diff[2] = (lut[i].blue >> 6) - (lut[i -
> > 1].blue >> 6);
> > -
> > - word = ((diff[0] & LUT_10BIT_MASK) <<
> > 20) +
> > - ((diff[1] & LUT_10BIT_MASK) <<
> > 10) +
> > - (diff[2] & LUT_10BIT_MASK);
> > + word = (lut_bits == 12) ?
> > + ((color.green <<
> > 12) + color.red)
> > + :
> > + ((color.red <<
> > 20) +
> > + (color.green <<
> > 10) + color.blue);
> > + word1 = color.blue;
> > + color_rec = color;
> > }
> > - writel(word, (lut_base + i * 4));
> > + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> > + writel(word, (lut_base + idx * 4));
> > + if (!(i % BANK_SIZE) && lut_bits == 12)
> > + writel((i / BANK_SIZE), regs +
> > DISP_GAMMA_BANK);
>
> This patch looks a little messy and mt8195 gamma introduce three
> different things. So I would like to separate this patch to 4
> patches.
>
> 1. Add multiple bank support. For other SoC, bank size is 0 which
> means
> no bank support.
> 2. Support different lut_size: For other SoC, lut_size = 512
> 3. Support different lut_bits: For other SoC, lut_bits = 10
> 4. Add MT8195 gamma support, bank_size = 256, lut_size = 1024,
> lut_bits
> = 12
>
> In this view point, I think the last patch is not a bug-fix but a new
> feature, so just drop the Fixes tag.
>
> Regards,
> CK
Hi CK,
Thanks for the reviews.
I'll help Zheng-yan finish this series.
I'll separate this one patch to the patches below:
drm/mediatek: Adjust mtk_drm_gamma_set_common parameters
drm/mediatek: Add gamma support different lut_size for other SoC
drm/mediatek: Add gamma support different lut_bits for other SoC
drm/mediatek: Add gamma support different bank_size for other SoC
drm/mediatek: Add gamma lut support for mt8195
drm/mediatek: Add clear RELAY_MODE bit to set gamma
Regrads,
Jason-JH.Lin
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^ permalink raw reply [flat|nested] 54+ messages in thread* Re: [PATCH v2 2/3] drm/mediatek: Add gamma lut support for mt8195
@ 2022-09-10 16:25 ` Jason-JH Lin
0 siblings, 0 replies; 54+ messages in thread
From: Jason-JH Lin @ 2022-09-10 16:25 UTC (permalink / raw)
To: CK Hu, zheng-yan.chen, Chun-Kuang Hu, Rob Herring,
Krzysztof Kozlowski, Matthias Brugger
Cc: devicetree, Singo Chang, linux-kernel, dri-devel,
Project_Global_Chrome_Upstream_Group, linux-mediatek,
linux-arm-kernel
On Wed, 2022-08-31 at 10:56 +0800, CK Hu wrote:
> Hi, Zheng-yan:
>
> On Tue, 2022-08-30 at 14:39 +0800, zheng-yan.chen wrote:
> > Since the previous gamma_set_common() function is designed for
> > 9bit-to-10bit conversion, which is not feasible for the
> > 10bit-to-12bit conversion in mt8195.
> >
> > Update the function to fit the need of mt8195.
> >
> > Fixes: 7266e90a51a3 ("drm/mediatek: Add mediatek-drm of vdosys0
> > support for mt8195")
> > Signed-off-by: zheng-yan.chen <zheng-yan.chen@mediatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_aal.c | 2 +-
> > drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 +-
> > drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 102 +++++++++++++++-
> > --
> > --
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +-
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +
> > 8 files changed, 85 insertions(+), 32 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > index 0f9d7efb61d7..f563eee3c330 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> > @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> > drm_crtc_state *state)
> > struct mtk_disp_aal *aal = dev_get_drvdata(dev);
> >
> > if (aal->data && aal->data->has_gamma)
> > - mtk_gamma_set_common(aal->regs, state, false);
> > + mtk_gamma_set_common(aal->regs, state, dev);
> > }
> >
> > void mtk_aal_start(struct device *dev)
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > index 33e61a136bbc..c1269fce9a66 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > @@ -51,8 +51,9 @@ void mtk_gamma_clk_disable(struct device *dev);
> > void mtk_gamma_config(struct device *dev, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> > +unsigned int mtk_gamma_size(struct device *dev);
> > void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> > *state);
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, bool lut_diff);
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, struct device *dev);
> > void mtk_gamma_start(struct device *dev);
> > void mtk_gamma_stop(struct device *dev);
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > index bbd558a036ec..0409e15fceb3 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> > @@ -18,18 +18,22 @@
> > #define DISP_GAMMA_EN 0x0000
> > #define GAMMA_EN BIT(0)
> > #define DISP_GAMMA_CFG 0x0020
> > +#define RELAY_MODE BIT(0)
> > #define GAMMA_LUT_EN BIT(1)
> > #define GAMMA_DITHERING BIT(2)
> > #define DISP_GAMMA_SIZE 0x0030
> > +#define DISP_GAMMA_BANK 0x0100
> > #define DISP_GAMMA_LUT 0x0700
> > -
> > -#define LUT_10BIT_MASK 0x03ff
> > -
> > +#define DISP_GAMMA_LUT1 0x0b00
> > +#define TABLE_9BIT_SIZE 512
> > +#define TABLE_10BIT_SIZE 1024
> > +#define BANK_SIZE 256
> > struct mtk_disp_gamma_data {
> > bool has_dither;
> > bool lut_diff;
> > + unsigned int lut_size;
> > + unsigned int lut_bits;
> > };
> > -
> > /*
> > * struct mtk_disp_gamma - DISP_GAMMA driver structure
> > */
> > @@ -54,40 +58,75 @@ void mtk_gamma_clk_disable(struct device *dev)
> > clk_disable_unprepare(gamma->clk);
> > }
> >
> > -void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, bool lut_diff)
> > +void mtk_gamma_set_common(void __iomem *regs, struct
> > drm_crtc_state
> > *state, struct device *dev)
> > {
> > - unsigned int i, reg;
> > - struct drm_color_lut *lut;
> > + unsigned int i, reg, idx;
> > void __iomem *lut_base;
> > - u32 word;
> > - u32 diff[3] = {0};
> > + void __iomem *lut1_base;
> > + u32 word, word1;
> > + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> >
> > if (state->gamma_lut) {
> > + u32 table_size;
> > + u32 mask;
> > + u32 lut_bits;
> > + u32 shift_bits;
> > + bool lut_diff;
> > + struct drm_color_lut color, color_rec;
> > + struct drm_color_lut *lut = (struct drm_color_lut
> > *)state->gamma_lut;
> > +
> > + table_size = gamma->data->lut_size;
> > + lut_bits = gamma->data->lut_bits;
> > + lut_diff = gamma->data->lut_diff;
> > + shift_bits = (lut_bits == 12) ? 4 : 6;
> > + mask = GENMASK(lut_bits - 1, 0);
> > reg = readl(regs + DISP_GAMMA_CFG);
> > + reg = reg & ~RELAY_MODE;
> > reg = reg | GAMMA_LUT_EN;
> > writel(reg, regs + DISP_GAMMA_CFG);
> > lut_base = regs + DISP_GAMMA_LUT;
> > - lut = (struct drm_color_lut *)state->gamma_lut->data;
> > - for (i = 0; i < MTK_LUT_SIZE; i++) {
> > -
> > - if (!lut_diff || (i % 2 == 0)) {
> > - word = (((lut[i].red >> 6) &
> > LUT_10BIT_MASK) << 20) +
> > - (((lut[i].green >> 6) &
> > LUT_10BIT_MASK) << 10) +
> > - ((lut[i].blue >> 6) &
> > LUT_10BIT_MASK);
> > + lut1_base = regs + DISP_GAMMA_LUT1;
> > + for (i = 0; i < table_size; i++) {
> > + color.red = (lut[i].red >> shift_bits) & mask;
> > + color.green = (lut[i].green >> shift_bits) &
> > mask;
> > + color.blue = (lut[i].blue >> shift_bits) &
> > mask;
> > + if (lut_diff && (i % 2)) {
> > + word = (lut_bits == 12) ?
> > + (((color.green -
> > color_rec.green) << 12) +
> > + (color.red -
> > color_rec.red))
> > + :
> > + (((color.red -
> > color_rec.red) << 20) +
> > + ((color.green -
> > color_rec.green) << 10) +
> > + (color.blue -
> > color_rec.blue));
> > + word1 = (color.blue - color_rec.blue);
> > } else {
> > - diff[0] = (lut[i].red >> 6) - (lut[i -
> > 1].red >> 6);
> > - diff[1] = (lut[i].green >> 6) - (lut[i
> > - 1].green >> 6);
> > - diff[2] = (lut[i].blue >> 6) - (lut[i -
> > 1].blue >> 6);
> > -
> > - word = ((diff[0] & LUT_10BIT_MASK) <<
> > 20) +
> > - ((diff[1] & LUT_10BIT_MASK) <<
> > 10) +
> > - (diff[2] & LUT_10BIT_MASK);
> > + word = (lut_bits == 12) ?
> > + ((color.green <<
> > 12) + color.red)
> > + :
> > + ((color.red <<
> > 20) +
> > + (color.green <<
> > 10) + color.blue);
> > + word1 = color.blue;
> > + color_rec = color;
> > }
> > - writel(word, (lut_base + i * 4));
> > + idx = (lut_bits == 12) ? (i % BANK_SIZE) : i;
> > + writel(word, (lut_base + idx * 4));
> > + if (!(i % BANK_SIZE) && lut_bits == 12)
> > + writel((i / BANK_SIZE), regs +
> > DISP_GAMMA_BANK);
>
> This patch looks a little messy and mt8195 gamma introduce three
> different things. So I would like to separate this patch to 4
> patches.
>
> 1. Add multiple bank support. For other SoC, bank size is 0 which
> means
> no bank support.
> 2. Support different lut_size: For other SoC, lut_size = 512
> 3. Support different lut_bits: For other SoC, lut_bits = 10
> 4. Add MT8195 gamma support, bank_size = 256, lut_size = 1024,
> lut_bits
> = 12
>
> In this view point, I think the last patch is not a bug-fix but a new
> feature, so just drop the Fixes tag.
>
> Regards,
> CK
Hi CK,
Thanks for the reviews.
I'll help Zheng-yan finish this series.
I'll separate this one patch to the patches below:
drm/mediatek: Adjust mtk_drm_gamma_set_common parameters
drm/mediatek: Add gamma support different lut_size for other SoC
drm/mediatek: Add gamma support different lut_bits for other SoC
drm/mediatek: Add gamma support different bank_size for other SoC
drm/mediatek: Add gamma lut support for mt8195
drm/mediatek: Add clear RELAY_MODE bit to set gamma
Regrads,
Jason-JH.Lin
^ permalink raw reply [flat|nested] 54+ messages in thread