[PATCH AUTOSEL 5.10 023/116] drm/amdgpu/display: set vblank_disable_immediate for DC

From: Sasha Levin
Date: Mon Jan 17 2022 - 21:53:16 EST


From: Alex Deucher <alexander.deucher@xxxxxxx>

[ Upstream commit 92020e81ddbeac351ea4a19bcf01743f32b9c800 ]

Disable vblanks immediately to save power. I think this was
missed when we merged DC support.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1781
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 1 -
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 2f70fdd6104f2..582055136cdbf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -267,7 +267,6 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
if (!amdgpu_device_has_dc_support(adev)) {
if (!adev->enable_virtual_display)
/* Disable vblank IRQs aggressively for power-saving */
- /* XXX: can this be enabled for DC? */
adev_to_drm(adev)->vblank_disable_immediate = true;

r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc);
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 a5b6f36fe1d72..6c8f141103da4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1069,6 +1069,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
adev_to_drm(adev)->mode_config.cursor_width = adev->dm.dc->caps.max_cursor_size;
adev_to_drm(adev)->mode_config.cursor_height = adev->dm.dc->caps.max_cursor_size;

+ /* Disable vblank IRQs aggressively for power-saving */
+ adev_to_drm(adev)->vblank_disable_immediate = true;
+
if (drm_vblank_init(adev_to_drm(adev), adev->dm.display_indexes_num)) {
DRM_ERROR(
"amdgpu: failed to initialize sw for display support.\n");
--
2.34.1