[PATCH 12/14] drm/amd/display: Add debug option to skip PSR CRTC disable

[Stylon Wang]

From: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>

[Why]
It's currently tied to Z10 support, and is required for Z10, but
we can still support Z10 display off without PSR.

We currently need to skip the PSR CRTC disable to prevent stuttering
and underflow from occuring during PSR-SU.

[How]
Add a debug option to allow specifying this separately.

Reviewed-by: Robin Chen <robin.chen at amd.com>
Acked-by: Stylon Wang <stylon.wang at amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c           | 2 +-
 drivers/gpu/drm/amd/display/dc/dc.h                     | 1 +
 drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 5304e9daf90a..342e906ae26e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -3378,7 +3378,7 @@ bool dc_link_setup_psr(struct dc_link *link,
 		case FAMILY_YELLOW_CARP:
 		case AMDGPU_FAMILY_GC_10_3_6:
 		case AMDGPU_FAMILY_GC_11_0_1:
-			if (dc->debug.disable_z10)
+			if (dc->debug.disable_z10 || dc->debug.psr_skip_crtc_disable)
 				psr_context->psr_level.bits.SKIP_CRTC_DISABLE = true;
 			break;
 		default:
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 4a7c0356d9c7..3cb8cf065204 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -844,6 +844,7 @@ struct dc_debug_options {
 	int crb_alloc_policy_min_disp_count;
 	bool disable_z10;
 	bool enable_z9_disable_interface;
+	bool psr_skip_crtc_disable;
 	union dpia_debug_options dpia_debug;
 	bool disable_fixed_vs_aux_timeout_wa;
 	bool force_disable_subvp;
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 4fffc7bb8088..f9ea1e86707f 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
@@ -886,6 +886,7 @@ static const struct dc_plane_cap plane_cap = {
 static const struct dc_debug_options debug_defaults_drv = {
 	.disable_z10 = false,
 	.enable_z9_disable_interface = true,
+	.psr_skip_crtc_disable = true,
 	.disable_dmcu = true,
 	.force_abm_enable = false,
 	.timing_trace = false,
-- 
2.25.1