[PATCH 01/47] drm/amd/display: Port DCN30 420 logic to DCN32

[Wayne Lin]

From: Chris Park <chris.park at amd.com>

[Why]
420 modes are limited by FMT buffer width of 4096
which requires multi-pipe support in form of ODM
combine.  If 420 modes have greater HActive than
4096, the DML logic should accomodate whether
it should be rejected, or ODM combine 2:1 or 4:1
is triggered accordingly.

[How]
FMT Buffer limit of 4096 in DCN32. Force ODM
combine depending on HActive and FMT Buffer limit.
Reject modes if TMDS 420 and above 4096.

Acked-by: Wayne Lin <wayne.lin at amd.com>
Signed-off-by: Chris Park <chris.park at amd.com>
---
 .../dc/dml/dcn32/display_mode_vba_32.c        |  2 ++
 .../dc/dml/dcn32/display_mode_vba_util_32.c   | 26 +++++++++++++++++++
 .../dc/dml/dcn32/display_mode_vba_util_32.h   |  1 +
 3 files changed, 29 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
index ad100658132f..75be1e1ce543 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
@@ -1992,6 +1992,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 				dml32_CalculateODMMode(
 						mode_lib->vba.MaximumPixelsPerLinePerDSCUnit,
 						mode_lib->vba.HActive[k],
+						mode_lib->vba.OutputFormat[k],
 						mode_lib->vba.Output[k],
 						mode_lib->vba.ODMUse[k],
 						mode_lib->vba.MaxDispclk[i],
@@ -2014,6 +2015,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 				dml32_CalculateODMMode(
 						mode_lib->vba.MaximumPixelsPerLinePerDSCUnit,
 						mode_lib->vba.HActive[k],
+						mode_lib->vba.OutputFormat[k],
 						mode_lib->vba.Output[k],
 						mode_lib->vba.ODMUse[k],
 						mode_lib->vba.MaxDispclk[i],
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
index 5b5b94f1024d..ad66e241f9ae 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
@@ -27,6 +27,8 @@
 #include "display_mode_vba_32.h"
 #include "../display_mode_lib.h"
 
+#define DCN32_MAX_FMT_420_BUFFER_WIDTH 4096
+
 unsigned int dml32_dscceComputeDelay(
 		unsigned int bpc,
 		double BPP,
@@ -1179,6 +1181,7 @@ void dml32_CalculateDETBufferSize(
 void dml32_CalculateODMMode(
 		unsigned int MaximumPixelsPerLinePerDSCUnit,
 		unsigned int HActive,
+		enum output_format_class OutFormat,
 		enum output_encoder_class Output,
 		enum odm_combine_policy ODMUse,
 		double StateDispclk,
@@ -1253,6 +1256,29 @@ void dml32_CalculateODMMode(
 		else
 			*TotalAvailablePipesSupport = false;
 	}
+	if (OutFormat == dm_420 && HActive > DCN32_MAX_FMT_420_BUFFER_WIDTH &&
+			ODMUse != dm_odm_combine_policy_4to1) {
+		if (HActive > DCN32_MAX_FMT_420_BUFFER_WIDTH * 4) {
+			*ODMMode = dm_odm_combine_mode_disabled;
+			*NumberOfDPP = 0;
+			*TotalAvailablePipesSupport = false;
+		} else if (HActive > DCN32_MAX_FMT_420_BUFFER_WIDTH * 2 ||
+				*ODMMode == dm_odm_combine_mode_4to1) {
+			*ODMMode = dm_odm_combine_mode_4to1;
+			*RequiredDISPCLKPerSurface = SurfaceRequiredDISPCLKWithODMCombineFourToOne;
+			*NumberOfDPP = 4;
+		} else {
+			*ODMMode = dm_odm_combine_mode_2to1;
+			*RequiredDISPCLKPerSurface = SurfaceRequiredDISPCLKWithODMCombineTwoToOne;
+			*NumberOfDPP = 2;
+		}
+	}
+	if (Output == dm_hdmi && OutFormat == dm_420 &&
+			HActive > DCN32_MAX_FMT_420_BUFFER_WIDTH) {
+		*ODMMode = dm_odm_combine_mode_disabled;
+		*NumberOfDPP = 0;
+		*TotalAvailablePipesSupport = false;
+	}
 }
 
 double dml32_CalculateRequiredDispclk(
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h
index 3dbc9cf46aad..55cead0d4237 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h
@@ -216,6 +216,7 @@ void dml32_CalculateDETBufferSize(
 void dml32_CalculateODMMode(
 		unsigned int MaximumPixelsPerLinePerDSCUnit,
 		unsigned int HActive,
+		enum output_format_class OutFormat,
 		enum output_encoder_class Output,
 		enum odm_combine_policy ODMUse,
 		double StateDispclk,
-- 
2.37.3