This is a note to let you know that I've just added the patch titled
Revert "drm/amd/display: disable SubVP + DRR to prevent underflow"
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-drm-amd-display-disable-subvp-drr-to-prevent-.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 50678a628e86023c579ff53c5da3e9fe65d0aea2
Author: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
Date: Tue Mar 21 10:25:04 2023 -0400
Revert "drm/amd/display: disable SubVP + DRR to prevent underflow"
[ Upstream commit f38129bb081758176dd78304faaee95007fb8838 ]
This reverts commit 80c6d6804f31451848a3956a70c2bcb1f07cfcb0.
The orignal commit was intended as a workaround to prevent underflow and
flickering when using one normal monitor and the other high refresh rate
monitor (> 120Hz).
This patch is being reverted in favour of a software solution to enable
SubVP+DRR
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index bdce367544368..4dd9a85f5c724 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1653,11 +1653,6 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
if (amdgpu_dc_feature_mask & DC_DISABLE_LTTPR_DP2_0)
init_data.flags.allow_lttpr_non_transparent_mode.bits.DP2_0 = true;
- /* Disable SubVP + DRR config by default */
- init_data.flags.disable_subvp_drr = true;
- if (amdgpu_dc_feature_mask & DC_ENABLE_SUBVP_DRR)
- init_data.flags.disable_subvp_drr = false;
-
init_data.flags.seamless_boot_edp_requested = false;
if (check_seamless_boot_capability(adev)) {
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
index d8b4119820bfc..1bfda6e2b3070 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
@@ -880,10 +880,6 @@ static bool subvp_drr_schedulable(struct dc *dc, struct dc_state *context, struc
int16_t stretched_drr_us = 0;
int16_t drr_stretched_vblank_us = 0;
int16_t max_vblank_mallregion = 0;
- const struct dc_config *config = &dc->config;
-
- if (config->disable_subvp_drr)
- return false;
// Find SubVP pipe
for (i = 0; i < dc->res_pool->pipe_count; i++) {
diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index e4a22c68517d1..f175e65b853a0 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -240,7 +240,6 @@ enum DC_FEATURE_MASK {
DC_DISABLE_LTTPR_DP2_0 = (1 << 6), //0x40, disabled by default
DC_PSR_ALLOW_SMU_OPT = (1 << 7), //0x80, disabled by default
DC_PSR_ALLOW_MULTI_DISP_OPT = (1 << 8), //0x100, disabled by default
- DC_ENABLE_SUBVP_DRR = (1 << 9), // 0x200, disabled by default
};
enum DC_DEBUG_MASK {
