[PATCH 06/15] drm/mediatek: Support alpha blending in VDOSYS0

From: Hsiao Chien Sung
Date: Wed Aug 23 2023 - 11:14:35 EST

Next message: Hsiao Chien Sung: "[PATCH 15/15] drm/mediatek: Fix errors when reporting rotation capability"
Previous message: Hsiao Chien Sung: "[PATCH 14/15] drm/mediatek: Adjust DRM mode configs for IGT"
In reply to: Hsiao Chien Sung: "[PATCH 14/15] drm/mediatek: Adjust DRM mode configs for IGT"
Next in thread: Hsiao Chien Sung: "[PATCH 15/15] drm/mediatek: Fix errors when reporting rotation capability"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Support premultiply and coverage alpha blending modes.

Signed-off-by: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 175 +++++++++++++++++++++---
1 file changed, 155 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 8f52cc1f3fba..824f81291293 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -31,6 +31,7 @@
#define OVL_LAYER_SMI_ID_EN BIT(0)
#define OVL_BGCLR_SEL_IN BIT(2)
#define OVL_LAYER_AFBC_EN(n) BIT(4+n)
+#define OVL_OUTPUT_CLAMP BIT(26)
#define DISP_REG_OVL_ROI_BGCLR 0x0028
#define DISP_REG_OVL_SRC_CON 0x002c
#define DISP_REG_OVL_CON(n) (0x0030 + 0x20 * (n))
@@ -39,10 +40,28 @@
#define DISP_REG_OVL_PITCH_MSB(n) (0x0040 + 0x20 * (n))
#define OVL_PITCH_MSB_2ND_SUBBUF BIT(16)
#define DISP_REG_OVL_PITCH(n) (0x0044 + 0x20 * (n))
+#define OVL_CONST_BLEND BIT(28)
#define DISP_REG_OVL_RDMA_CTRL(n) (0x00c0 + 0x20 * (n))
#define DISP_REG_OVL_RDMA_GMC(n) (0x00c8 + 0x20 * (n))
#define DISP_REG_OVL_ADDR_MT2701 0x0040
#define DISP_REG_OVL_CLRFMT_EXT 0x02D0
+#define DISP_REG_OVL_CLRFMT_EXT1 0x02D8
+#define OVL_CLRFMT_EXT1_CSC_EN(n) (1 << ((n) * 4 + 1))
+#define DISP_REG_OVL_Y2R_PARA_R0(n) (0x0134 + 0x28 * (n))
+#define OVL_Y2R_PARA_C_CF_RMY (GENMASK(14, 0))
+#define DISP_REG_OVL_Y2R_PARA_G0(n) (0x013c + 0x28 * (n))
+#define OVL_Y2R_PARA_C_CF_GMU (GENMASK(30, 16))
+#define DISP_REG_OVL_Y2R_PARA_B1(n) (0x0148 + 0x28 * (n))
+#define OVL_Y2R_PARA_C_CF_BMV (GENMASK(14, 0))
+#define DISP_REG_OVL_Y2R_PARA_YUV_A_0(n) (0x014c + 0x28 * (n))
+#define OVL_Y2R_PARA_C_CF_YA (GENMASK(10, 0))
+#define OVL_Y2R_PARA_C_CF_UA (GENMASK(26, 16))
+#define DISP_REG_OVL_Y2R_PARA_YUV_A_1(n) (0x0150 + 0x28 * (n))
+#define OVL_Y2R_PARA_C_CF_VA (GENMASK(10, 0))
+#define DISP_REG_OVL_Y2R_PRE_ADD2(n) (0x0154 + 0x28 * (n))
+#define DISP_REG_OVL_R2R_R0(n) (0x0500 + 0x40 * (n))
+#define DISP_REG_OVL_R2R_G1(n) (0x0510 + 0x40 * (n))
+#define DISP_REG_OVL_R2R_B2(n) (0x0520 + 0x40 * (n))
#define DISP_REG_OVL_ADDR_MT8173 0x0f40
#define DISP_REG_OVL_ADDR(ovl, n) ((ovl)->data->addr + 0x20 * (n))
#define DISP_REG_OVL_HDR_ADDR(ovl, n) ((ovl)->data->addr + 0x20 * (n) + 0x04)
@@ -52,13 +71,19 @@
#define GMC_THRESHOLD_HIGH ((1 << GMC_THRESHOLD_BITS) / 4)
#define GMC_THRESHOLD_LOW ((1 << GMC_THRESHOLD_BITS) / 8)

-#define OVL_CON_BYTE_SWAP BIT(24)
-#define OVL_CON_MTX_YUV_TO_RGB (6 << 16)
-#define OVL_CON_CLRFMT_RGB (1 << 12)
-#define OVL_CON_CLRFMT_RGBA8888 (2 << 12)
-#define OVL_CON_CLRFMT_ARGB8888 (3 << 12)
-#define OVL_CON_CLRFMT_UYVY (4 << 12)
-#define OVL_CON_CLRFMT_YUYV (5 << 12)
+#define OVL_CON_CLRFMT_MAN BIT(23)
+#define OVL_CON_BYTE_SWAP BIT(24)
+#define OVL_CON_RGB_SWAP BIT(25)
+#define OVL_CON_MTX_AUTO_DIS BIT(26)
+#define OVL_CON_MTX_EN BIT(27)
+#define OVL_CON_CLRFMT_RGB (1 << 12)
+#define OVL_CON_CLRFMT_RGBA8888 (2 << 12)
+#define OVL_CON_CLRFMT_ARGB8888 (3 << 12)
+#define OVL_CON_CLRFMT_PARGB8888 (OVL_CON_CLRFMT_ARGB8888 | OVL_CON_CLRFMT_MAN)
+#define OVL_CON_CLRFMT_UYVY (4 << 12)
+#define OVL_CON_CLRFMT_YUYV (5 << 12)
+#define OVL_CON_MTX_YUV_TO_RGB (6 << 16)
+#define OVL_CON_MTX_PROGRAMMABLE (8 << 16)
#define OVL_CON_CLRFMT_RGB565(ovl) ((ovl)->data->fmt_rgb565_is_0 ? \
0 : OVL_CON_CLRFMT_RGB)
#define OVL_CON_CLRFMT_RGB888(ovl) ((ovl)->data->fmt_rgb565_is_0 ? \
@@ -72,6 +97,22 @@
#define OVL_CON_VIRT_FLIP BIT(9)
#define OVL_CON_HORZ_FLIP BIT(10)

+static inline bool is_10bit_rgb(u32 fmt)
+{
+ switch (fmt) {
+ case DRM_FORMAT_XRGB2101010:
+ case DRM_FORMAT_ARGB2101010:
+ case DRM_FORMAT_RGBX1010102:
+ case DRM_FORMAT_RGBA1010102:
+ case DRM_FORMAT_XBGR2101010:
+ case DRM_FORMAT_ABGR2101010:
+ case DRM_FORMAT_BGRX1010102:
+ case DRM_FORMAT_BGRA1010102:
+ return true;
+ }
+ return false;
+}
+
static const u32 mt8173_formats[] = {
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ARGB8888,
@@ -89,12 +130,20 @@ static const u32 mt8173_formats[] = {
static const u32 mt8195_formats[] = {
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_XRGB2101010,
DRM_FORMAT_ARGB2101010,
DRM_FORMAT_BGRX8888,
DRM_FORMAT_BGRA8888,
+ DRM_FORMAT_BGRX1010102,
DRM_FORMAT_BGRA1010102,
DRM_FORMAT_ABGR8888,
DRM_FORMAT_XBGR8888,
+ DRM_FORMAT_XBGR2101010,
+ DRM_FORMAT_ABGR2101010,
+ DRM_FORMAT_RGBX8888,
+ DRM_FORMAT_RGBA8888,
+ DRM_FORMAT_RGBX1010102,
+ DRM_FORMAT_RGBA1010102,
DRM_FORMAT_RGB888,
DRM_FORMAT_BGR888,
DRM_FORMAT_RGB565,
@@ -208,14 +257,14 @@ void mtk_ovl_clk_disable(struct device *dev)
void mtk_ovl_start(struct device *dev)
{
struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
+ unsigned int reg = 0;

if (ovl->data->smi_id_en) {
- unsigned int reg;
-
reg = readl(ovl->regs + DISP_REG_OVL_DATAPATH_CON);
reg = reg | OVL_LAYER_SMI_ID_EN;
- writel_relaxed(reg, ovl->regs + DISP_REG_OVL_DATAPATH_CON);
}
+ reg |= OVL_OUTPUT_CLAMP;
+ writel_relaxed(reg, ovl->regs + DISP_REG_OVL_DATAPATH_CON);
writel_relaxed(0x1, ovl->regs + DISP_REG_OVL_EN);
}

@@ -254,9 +303,7 @@ static void mtk_ovl_set_bit_depth(struct device *dev, int idx, u32 format,
reg = readl(ovl->regs + DISP_REG_OVL_CLRFMT_EXT);
reg &= ~OVL_CON_CLRFMT_BIT_DEPTH_MASK(idx);

- if (format == DRM_FORMAT_RGBA1010102 ||
- format == DRM_FORMAT_BGRA1010102 ||
- format == DRM_FORMAT_ARGB2101010)
+ if (is_10bit_rgb(format))
bit_depth = OVL_CON_CLRFMT_10_BIT;

reg |= OVL_CON_CLRFMT_BIT_DEPTH(bit_depth, idx);
@@ -357,7 +404,8 @@ void mtk_ovl_layer_off(struct device *dev, unsigned int idx,
DISP_REG_OVL_RDMA_CTRL(idx));
}

-static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt)
+static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt,
+ unsigned int blend_mode)
{
/* The return value in switch "MEM_MODE_INPUT_FORMAT_XXX"
* is defined in mediatek HW data sheet.
@@ -376,17 +424,37 @@ static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt)
return OVL_CON_CLRFMT_RGB888(ovl) | OVL_CON_BYTE_SWAP;
case DRM_FORMAT_RGBX8888:
case DRM_FORMAT_RGBA8888:
+ return blend_mode == DRM_MODE_BLEND_COVERAGE ?
+ OVL_CON_CLRFMT_ARGB8888 :
+ OVL_CON_CLRFMT_PARGB8888;
+ case DRM_FORMAT_RGBX1010102:
+ case DRM_FORMAT_RGBA1010102:
return OVL_CON_CLRFMT_ARGB8888;
case DRM_FORMAT_BGRX8888:
case DRM_FORMAT_BGRA8888:
+ return OVL_CON_BYTE_SWAP |
+ (blend_mode == DRM_MODE_BLEND_COVERAGE ?
+ OVL_CON_CLRFMT_ARGB8888 :
+ OVL_CON_CLRFMT_PARGB8888);
+ case DRM_FORMAT_BGRX1010102:
case DRM_FORMAT_BGRA1010102:
return OVL_CON_CLRFMT_ARGB8888 | OVL_CON_BYTE_SWAP;
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
+ return blend_mode == DRM_MODE_BLEND_COVERAGE ?
+ OVL_CON_CLRFMT_RGBA8888 :
+ OVL_CON_CLRFMT_PARGB8888;
+ case DRM_FORMAT_XRGB2101010:
case DRM_FORMAT_ARGB2101010:
return OVL_CON_CLRFMT_RGBA8888;
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_ABGR8888:
+ return OVL_CON_RGB_SWAP |
+ (blend_mode == DRM_MODE_BLEND_COVERAGE ?
+ OVL_CON_CLRFMT_RGBA8888 :
+ OVL_CON_CLRFMT_PARGB8888);
+ case DRM_FORMAT_XBGR2101010:
+ case DRM_FORMAT_ABGR2101010:
return OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP;
case DRM_FORMAT_UYVY:
return OVL_CON_CLRFMT_UYVY | OVL_CON_MTX_YUV_TO_RGB;
@@ -408,6 +476,8 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx,
unsigned int fmt = pending->format;
unsigned int offset = (pending->y << 16) | pending->x;
unsigned int src_size = (pending->height << 16) | pending->width;
+ unsigned int blend_mode = state->base.pixel_blend_mode;
+ unsigned int ignore_pixel_alpha = 0;
unsigned int con;
bool is_afbc = pending->modifier != DRM_FORMAT_MOD_LINEAR;
union overlay_pitch {
@@ -420,14 +490,79 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx,

overlay_pitch.pitch = pitch;

- if (!pending->enable) {
+ if (!pending->enable || !pending->width || !pending->height) {
mtk_ovl_layer_off(dev, idx, cmdq_pkt);
return;
}

- con = ovl_fmt_convert(ovl, fmt);
- if (state->base.fb && state->base.fb->format->has_alpha)
- con |= OVL_CON_AEN | OVL_CON_ALPHA;
+ con = ovl_fmt_convert(ovl, fmt, blend_mode);
+ if (state->base.fb) {
+ con |= OVL_CON_AEN;
+ con |= state->base.alpha & 0xff;
+ }
+
+ if (blend_mode == DRM_MODE_BLEND_PIXEL_NONE ||
+ (state->base.fb && !state->base.fb->format->has_alpha))
+ ignore_pixel_alpha = OVL_CONST_BLEND;
+
+ /* need to do Y2R and R2R to reduce 10bit data to 8bit for CRC calculation */
+ if (ovl->data->supports_clrfmt_ext) {
+ u32 y2r_coef = 0, y2r_offset = 0, r2r_coef = 0, csc_en = 0;
+
+ if (is_10bit_rgb(fmt)) {
+ con |= OVL_CON_MTX_AUTO_DIS | OVL_CON_MTX_EN | OVL_CON_MTX_PROGRAMMABLE;
+
+ /* Y2R coef setting: bit 13 is 2^1, bit 12 is 2^0, bit 11 is 2^-1, ... */
+ y2r_coef = BIT(10); /* bit 10 is 2^-2 = 0.25 */
+ y2r_offset = 0x7fe; /* -1 in 10bit */
+ /* R2R coef setting: bit 19 is 2^1, bit 18 is 2^0, bit 17 is 2^-1, ... */
+ r2r_coef = BIT(20); /* bit 20 is 2^2 = 4 */
+ csc_en = OVL_CLRFMT_EXT1_CSC_EN(idx); /* CSC_EN is for R2R */
+
+ /*
+ * 1. YUV input data - 1 and shift right for 2 bits to remove it
+ * [R'] [0.25 0 0] [Y in - 1]
+ * [G'] = [ 0 0.25 0] * [U in - 1]
+ * [B'] [ 0 0 0.25] [V in - 1]
+ *
+ * 2. shift left for 2 bit letting the last 2 bits become 0
+ * [R out] [ 4 0 0] [R']
+ * [G out] = [ 0 4 0] * [G']
+ * [B out] [ 0 0 4] [B']
+ */
+ }
+
+ mtk_ddp_write_mask(cmdq_pkt, y2r_coef,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_R0(idx),
+ OVL_Y2R_PARA_C_CF_RMY);
+ mtk_ddp_write_mask(cmdq_pkt, (y2r_coef << 16),
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_G0(idx),
+ OVL_Y2R_PARA_C_CF_GMU);
+ mtk_ddp_write_mask(cmdq_pkt, y2r_coef,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_B1(idx),
+ OVL_Y2R_PARA_C_CF_BMV);
+
+ mtk_ddp_write_mask(cmdq_pkt, y2r_offset,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_YUV_A_0(idx),
+ OVL_Y2R_PARA_C_CF_YA);
+ mtk_ddp_write_mask(cmdq_pkt, (y2r_offset << 16),
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_YUV_A_0(idx),
+ OVL_Y2R_PARA_C_CF_UA);
+ mtk_ddp_write_mask(cmdq_pkt, y2r_offset,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_YUV_A_1(idx),
+ OVL_Y2R_PARA_C_CF_VA);
+
+ mtk_ddp_write_relaxed(cmdq_pkt, r2r_coef,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_R2R_R0(idx));
+ mtk_ddp_write_relaxed(cmdq_pkt, r2r_coef,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_R2R_G1(idx));
+ mtk_ddp_write_relaxed(cmdq_pkt, r2r_coef,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_R2R_B2(idx));
+
+ mtk_ddp_write_mask(cmdq_pkt, csc_en,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_CLRFMT_EXT1,
+ OVL_CLRFMT_EXT1_CSC_EN(idx));
+ }

if (pending->rotation & DRM_MODE_REFLECT_Y) {
con |= OVL_CON_VIRT_FLIP;
@@ -444,8 +579,8 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx,

mtk_ddp_write_relaxed(cmdq_pkt, con, &ovl->cmdq_reg, ovl->regs,
DISP_REG_OVL_CON(idx));
- mtk_ddp_write_relaxed(cmdq_pkt, overlay_pitch.split_pitch.lsb, &ovl->cmdq_reg, ovl->regs,
- DISP_REG_OVL_PITCH(idx));
+ mtk_ddp_write_relaxed(cmdq_pkt, overlay_pitch.split_pitch.lsb | ignore_pixel_alpha,
+ &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_PITCH(idx));
mtk_ddp_write_relaxed(cmdq_pkt, src_size, &ovl->cmdq_reg, ovl->regs,
DISP_REG_OVL_SRC_SIZE(idx));
mtk_ddp_write_relaxed(cmdq_pkt, offset, &ovl->cmdq_reg, ovl->regs,
--
2.18.0

Next message: Hsiao Chien Sung: "[PATCH 15/15] drm/mediatek: Fix errors when reporting rotation capability"
Previous message: Hsiao Chien Sung: "[PATCH 14/15] drm/mediatek: Adjust DRM mode configs for IGT"
In reply to: Hsiao Chien Sung: "[PATCH 14/15] drm/mediatek: Adjust DRM mode configs for IGT"
Next in thread: Hsiao Chien Sung: "[PATCH 15/15] drm/mediatek: Fix errors when reporting rotation capability"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]