[REPOST PATCH v4 04/13] drm/msm/disp/dpu1: Add support for DSC in pingpong block

Vinod Koul
2022-02-10T10:34:57Z

In SDM845, DSC can be enabled by writing to pingpong block registers, so
add support for DSC in hw_pp

Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
.../gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 32 +++++++++++++++++++
.../gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h | 14 ++++++++
2 files changed, 46 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
index 55766c97c4c8..47c6ab6caf95 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
@@ -28,6 +28,9 @@
#define PP_FBC_MODE 0x034
#define PP_FBC_BUDGET_CTL 0x038
#define PP_FBC_LOSSY_MODE 0x03C
+#define PP_DSC_MODE 0x0a0
+#define PP_DCE_DATA_IN_SWAP 0x0ac
+#define PP_DCE_DATA_OUT_SWAP 0x0c8

#define PP_DITHER_EN 0x000
#define PP_DITHER_BITDEPTH 0x004
@@ -245,6 +248,32 @@ static u32 dpu_hw_pp_get_line_count(struct dpu_hw_pingpong *pp)
return line;
}

+static int dpu_hw_pp_dsc_enable(struct dpu_hw_pingpong *pp)
+{
+ struct dpu_hw_blk_reg_map *c = &pp->hw;
+
+ DPU_REG_WRITE(c, PP_DSC_MODE, 1);
+ return 0;
+}
+
+static void dpu_hw_pp_dsc_disable(struct dpu_hw_pingpong *pp)
+{
+ struct dpu_hw_blk_reg_map *c = &pp->hw;
+
+ DPU_REG_WRITE(c, PP_DSC_MODE, 0);
+}
+
+static int dpu_hw_pp_setup_dsc(struct dpu_hw_pingpong *pp)
+{
+ struct dpu_hw_blk_reg_map *pp_c = &pp->hw;
+ int data;
+
+ data = DPU_REG_READ(pp_c, PP_DCE_DATA_OUT_SWAP);
+ data |= BIT(18); /* endian flip */
+ DPU_REG_WRITE(pp_c, PP_DCE_DATA_OUT_SWAP, data);
+ return 0;
+}
+
static void _setup_pingpong_ops(struct dpu_hw_pingpong *c,
unsigned long features)
{
@@ -256,6 +285,9 @@ static void _setup_pingpong_ops(struct dpu_hw_pingpong *c,
c->ops.get_autorefresh = dpu_hw_pp_get_autorefresh_config;
c->ops.poll_timeout_wr_ptr = dpu_hw_pp_poll_timeout_wr_ptr;
c->ops.get_line_count = dpu_hw_pp_get_line_count;
+ c->ops.setup_dsc = dpu_hw_pp_setup_dsc;
+ c->ops.enable_dsc = dpu_hw_pp_dsc_enable;
+ c->ops.disable_dsc = dpu_hw_pp_dsc_disable;

if (test_bit(DPU_PINGPONG_DITHER, &features))
c->ops.setup_dither = dpu_hw_pp_setup_dither;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
index 89d08a715c16..12758468d9ca 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
@@ -124,6 +124,20 @@ struct dpu_hw_pingpong_ops {
*/
void (*setup_dither)(struct dpu_hw_pingpong *pp,
struct dpu_hw_dither_cfg *cfg);
+ /**
+ * Enable DSC
+ */
+ int (*enable_dsc)(struct dpu_hw_pingpong *pp);
+
+ /**
+ * Disable DSC
+ */
+ void (*disable_dsc)(struct dpu_hw_pingpong *pp);
+
+ /**
+ * Setup DSC
+ */
+ int (*setup_dsc)(struct dpu_hw_pingpong *pp);
};

struct dpu_hw_merge_3d;
--
2.31.1