[PATCH 1/2] drm: Add missing DP DSC extended capability definitions.

* [PATCH 1/2] drm: Add missing DP DSC extended capability definitions.
@ 2022-03-17 16:25 ` Stanislav Lisovskiy
  0 siblings, 0 replies; 8+ messages in thread
From: Stanislav Lisovskiy @ 2022-03-17 16:25 UTC (permalink / raw)
  To: dri-devel; +Cc: manasi.d.navare, Stanislav.Lisovskiy, intel-gfx, jani.saarinen

Adding DP DSC register definitions, we might need for further
DSC implementation, supporting MST and DP branch pass-through mode.

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
---
 drivers/gpu/drm/dp/drm_dp.c    | 25 +++++++++++++++++++++++++
 include/drm/dp/drm_dp_helper.h | 11 ++++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/dp/drm_dp.c b/drivers/gpu/drm/dp/drm_dp.c
index 703972ae14c6..fe9c72055638 100644
--- a/drivers/gpu/drm/dp/drm_dp.c
+++ b/drivers/gpu/drm/dp/drm_dp.c
@@ -2312,6 +2312,31 @@ u8 drm_dp_dsc_sink_max_slice_count(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE],
 }
 EXPORT_SYMBOL(drm_dp_dsc_sink_max_slice_count);
 
+/**
+  * drm_dp_dsc_sink_bpp_increment_div - Get the bits per pixel precision
+  * which DP DSC sink device supports.
+  */
+u8 drm_dp_dsc_sink_bpp_increment_div(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
+{
+	u8 bpp_increment_dpcd = dsc_dpcd[DP_DSC_BITS_PER_PIXEL_INC - DP_DSC_SUPPORT];
+
+	switch (bpp_increment_dpcd) {
+	case DP_DSC_BITS_PER_PIXEL_1_16:
+		return 16;
+	case DP_DSC_BITS_PER_PIXEL_1_8:
+		return 8;
+	case DP_DSC_BITS_PER_PIXEL_1_4:
+		return 4;
+	case DP_DSC_BITS_PER_PIXEL_1_2:
+		return 2;
+	case DP_DSC_BITS_PER_PIXEL_1_1:
+		return 1;
+	}
+
+	return 0;
+}
+
+
 /**
  * drm_dp_dsc_sink_line_buf_depth() - Get the line buffer depth in bits
  * @dsc_dpcd: DSC capabilities from DPCD
diff --git a/include/drm/dp/drm_dp_helper.h b/include/drm/dp/drm_dp_helper.h
index 51e02cf75277..e4c9f4438ccb 100644
--- a/include/drm/dp/drm_dp_helper.h
+++ b/include/drm/dp/drm_dp_helper.h
@@ -246,6 +246,9 @@ struct drm_panel;
 
 #define DP_DSC_SUPPORT                      0x060   /* DP 1.4 */
 # define DP_DSC_DECOMPRESSION_IS_SUPPORTED  (1 << 0)
+# define DP_DSC_PASS_THROUGH_IS_SUPPORTED   (1 << 1)
+# define DP_DSC_DYNAMIC_PPS_UPDATE_SUPPORT_COMP_TO_COMP    (1 << 2)
+# define DP_DSC_DYNAMIC_PPS_UPDATE_SUPPORT_UNCOMP_TO_COMP  (1 << 3)
 
 #define DP_DSC_REV                          0x061
 # define DP_DSC_MAJOR_MASK                  (0xf << 0)
@@ -284,12 +287,15 @@ struct drm_panel;
 
 #define DP_DSC_BLK_PREDICTION_SUPPORT       0x066
 # define DP_DSC_BLK_PREDICTION_IS_SUPPORTED (1 << 0)
+# define DP_DSC_RGB_COLOR_CONV_BYPASS_SUPPORT (1 << 1)
 
 #define DP_DSC_MAX_BITS_PER_PIXEL_LOW       0x067   /* eDP 1.4 */
 
 #define DP_DSC_MAX_BITS_PER_PIXEL_HI        0x068   /* eDP 1.4 */
 # define DP_DSC_MAX_BITS_PER_PIXEL_HI_MASK  (0x3 << 0)
 # define DP_DSC_MAX_BITS_PER_PIXEL_HI_SHIFT 8
+# define DP_DSC_MAX_BPP_DELTA_VERSION_MASK  0x06
+# define DP_DSC_MAX_BPP_DELTA_AVAILABILITY  0x08
 
 #define DP_DSC_DEC_COLOR_FORMAT_CAP         0x069
 # define DP_DSC_RGB                         (1 << 0)
@@ -351,11 +357,13 @@ struct drm_panel;
 # define DP_DSC_24_PER_DP_DSC_SINK          (1 << 2)
 
 #define DP_DSC_BITS_PER_PIXEL_INC           0x06F
+# define DP_DSC_RGB_YCbCr444_MAX_BPP_DELTA_MASK 0x1f
+# define DP_DSC_RGB_YCbCr420_MAX_BPP_DELTA_MASK 0xe0
 # define DP_DSC_BITS_PER_PIXEL_1_16         0x0
 # define DP_DSC_BITS_PER_PIXEL_1_8          0x1
 # define DP_DSC_BITS_PER_PIXEL_1_4          0x2
 # define DP_DSC_BITS_PER_PIXEL_1_2          0x3
-# define DP_DSC_BITS_PER_PIXEL_1            0x4
+# define DP_DSC_BITS_PER_PIXEL_1_1          0x4
 
 #define DP_PSR_SUPPORT                      0x070   /* XXX 1.2? */
 # define DP_PSR_IS_SUPPORTED                1
@@ -1825,6 +1833,7 @@ u8 drm_dp_dsc_sink_max_slice_count(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE],
 u8 drm_dp_dsc_sink_line_buf_depth(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]);
 int drm_dp_dsc_sink_supported_input_bpcs(const u8 dsc_dpc[DP_DSC_RECEIVER_CAP_SIZE],
 					 u8 dsc_bpc[3]);
+u8 drm_dp_dsc_sink_bpp_increment_div(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]);
 
 static inline bool
 drm_dp_sink_supports_dsc(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
-- 
2.24.1.485.gad05a3d8e5


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