[PATCH 04/16] drm/amd/display: Modify Vmin default value

[Tom Chung]

From: Max Tseng <max.tseng at amd.com>

Fine tune the Vmin clock value

Reviewed-by: Robin Chen <robin.chen at amd.com>
Acked-by: Tom Chung <chiahsuan.chung at amd.com>
Signed-off-by: Max Tseng <max.tseng at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c | 2 +-
 drivers/gpu/drm/amd/display/dc/dcn35/dcn35_resource.c   | 8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
index d8fa229d78ce..64a2692fd4f6 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
@@ -1914,7 +1914,7 @@ static bool dcn314_resource_construct(
 	dc->caps.color.mpc.ogam_rom_caps.hlg = 0;
 	dc->caps.color.mpc.ocsc = 1;
 
-	dc->caps.max_disp_clock_khz_at_vmin = 694000;
+	dc->caps.max_disp_clock_khz_at_vmin = 650000;
 
 	/* Use pipe context based otg sync logic */
 	dc->config.use_pipe_ctx_sync_logic = true;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn35/dcn35_resource.c b/drivers/gpu/drm/amd/display/dc/dcn35/dcn35_resource.c
index 693c7ba4b34d..24b455f3ac3c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn35/dcn35_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn35/dcn35_resource.c
@@ -1831,7 +1831,13 @@ static bool dcn35_resource_construct(
 	dc->caps.color.mpc.ogam_rom_caps.hlg = 0;
 	dc->caps.color.mpc.ocsc = 1;
 
-	dc->caps.max_disp_clock_khz_at_vmin = 669154;
+	/* max_disp_clock_khz_at_vmin is slightly lower than the STA value in order
+	 * to provide some margin.
+	 * It's expected for furture ASIC to have equal or higher value, in order to
+	 * have determinstic power improvement from generate to genration.
+	 * (i.e., we should not expect new ASIC generation with lower vmin rate)
+	 */
+	dc->caps.max_disp_clock_khz_at_vmin = 650000;
 
 	/* Use pipe context based otg sync logic */
 	dc->config.use_pipe_ctx_sync_logic = true;
-- 
2.25.1