[PATCH 2/2] drm/amd/display: Enable fp16 also on DCE-8/10/11.

Mario Kleiner mario.kleiner.de at gmail.com
Mon Dec 28 18:50:59 UTC 2020


The hw supports fp16, this is not only useful for HDR,
but also for standard dynamic range displays, because
it allows to get more precise color reproduction with
about 11 - 12 bpc linear precision in the unorm range
0.0 - 1.0.

Working fp16 scanout+display (and HDR over HDMI) was
verified on a DCE-8 asic, so i assume that the more
recent DCE-10/11 will work equally well, now that
format-specific plane scaling constraints are properly
enforced, e.g., the inability of fp16 to scale on older
hw like DCE-8 to DCE-11.

Signed-off-by: Mario Kleiner <mario.kleiner.de at gmail.com>
---
 drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c | 2 +-
 drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c | 2 +-
 drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c b/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
index 8ab9d6c79808..f20ed05a5050 100644
--- a/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
@@ -385,7 +385,7 @@ static const struct dc_plane_cap plane_cap = {
 	.pixel_format_support = {
 			.argb8888 = true,
 			.nv12 = false,
-			.fp16 = false
+			.fp16 = true
 	},
 
 	.max_upscale_factor = {
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
index 3f63822b8e28..af208f9bd03b 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
@@ -410,7 +410,7 @@ static const struct dc_plane_cap plane_cap = {
 		.pixel_format_support = {
 				.argb8888 = true,
 				.nv12 = false,
-				.fp16 = false
+				.fp16 = true
 		},
 
 		.max_upscale_factor = {
diff --git a/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c b/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
index 390a0fa37239..26fe25caa281 100644
--- a/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c
@@ -402,7 +402,7 @@ static const struct dc_plane_cap plane_cap = {
 	.pixel_format_support = {
 			.argb8888 = true,
 			.nv12 = false,
-			.fp16 = false
+			.fp16 = true
 	},
 
 	.max_upscale_factor = {
-- 
2.25.1



More information about the dri-devel mailing list