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

[Vinod Koul]

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

Signed-off-by: Vinod Koul <vk...@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 245a7a62b5c6..07fc131ca9aa 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 845b9ce80e31..5058e41ffbc0 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_pingpong {
-- 
2.26.3

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