linux-kernel - [PATCH AUTOSEL 6.14 461/642] drm/amd/display: pass calculated dram_speed

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Message-Id: <20250505221419.2672473-461-sashal@kernel.org>
Date: Mon,  5 May 2025 18:11:17 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Charlene Liu <Charlene.Liu@....com>,
	Aurabindo Pillai <aurabindo.pillai@....com>,
	Roman Li <Roman.Li@....com>,
	Daniel Wheeler <daniel.wheeler@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Sasha Levin <sashal@...nel.org>,
	austin.zheng@....com,
	jun.lei@....com,
	harry.wentland@....com,
	sunpeng.li@....com,
	christian.koenig@....com,
	airlied@...il.com,
	simona@...ll.ch,
	nsusanto@....com,
	chiahsuan.chung@....com,
	nicholas.kazlauskas@....com,
	paul.hsieh@....com,
	daniel.miess@....com,
	zaeem.mohamed@....com,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.14 461/642] drm/amd/display: pass calculated dram_speed_mts to dml2

From: Charlene Liu <Charlene.Liu@....com>

[ Upstream commit b40d022ec06ade9f6c809091dc188422a0f0946d ]

[why]
currently dml2 is using a hard coded 16 to convert memclk to dram_speed_mts.
for apu, this depends on wck_ratio.

change to pass the already calculated dram_speed_mts from fpu to dml2.

v2: use existing calculation of dram_speed_mts for now to avoid regression

Signed-off-by: Charlene Liu <Charlene.Liu@....com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@....com>
Reviewed-by: Roman Li <Roman.Li@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c   | 2 ++
 drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c | 1 +
 drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.h     | 1 +
 3 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
index 47d785204f29c..e8efffcc69a16 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
@@ -367,6 +367,8 @@ void dcn35_update_bw_bounding_box_fpu(struct dc *dc,
 				clock_limits[i].socclk_mhz;
 			dc->dml2_options.bbox_overrides.clks_table.clk_entries[i].memclk_mhz =
 				clk_table->entries[i].memclk_mhz * clk_table->entries[i].wck_ratio;
+
+			dc->dml2_options.bbox_overrides.clks_table.clk_entries[i].dram_speed_mts = clock_limits[i].dram_speed_mts;
 			dc->dml2_options.bbox_overrides.clks_table.clk_entries[i].dtbclk_mhz =
 				clock_limits[i].dtbclk_mhz;
 			dc->dml2_options.bbox_overrides.clks_table.num_entries_per_clk.num_dcfclk_levels =
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c
index d9e63c4fdd95c..17d0b4923b0cc 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c
@@ -401,6 +401,7 @@ void dcn351_update_bw_bounding_box_fpu(struct dc *dc,
 				clock_limits[i].socclk_mhz;
 			dc->dml2_options.bbox_overrides.clks_table.clk_entries[i].memclk_mhz =
 				clk_table->entries[i].memclk_mhz * clk_table->entries[i].wck_ratio;
+			dc->dml2_options.bbox_overrides.clks_table.clk_entries[i].dram_speed_mts = clock_limits[i].dram_speed_mts;
 			dc->dml2_options.bbox_overrides.clks_table.clk_entries[i].dtbclk_mhz =
 				clock_limits[i].dtbclk_mhz;
 			dc->dml2_options.bbox_overrides.clks_table.num_entries_per_clk.num_dcfclk_levels =
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.h b/drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.h
index 0f944fcfd5a5b..785226945699d 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.h
+++ b/drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.h
@@ -159,6 +159,7 @@ struct dml2_clks_table_entry {
 	unsigned int dtbclk_mhz;
 	unsigned int dispclk_mhz;
 	unsigned int dppclk_mhz;
+	unsigned int dram_speed_mts; /*which is based on wck_ratio*/
 };
 
 struct dml2_clks_num_entries {
-- 
2.39.5