[PATCH] drm/amd/dc: Trigger set power state task when display configuration changes

[Francis, David]

On Linux, the clocks are already set by the time that function call is reached.  amdgpu_pm_compute clocks resets the clocks to their default value.

________________________________
From: Zhu, Rex
Sent: September 17, 2018 4:12:33 AM
To: Deucher, Alexander; Wentland, Harry; Francis, David
Cc: amd-gfx at lists.freedesktop.org
Subject: RE: [PATCH] drm/amd/dc: Trigger set power state task when display configuration changes


+Harry and David.



Best Regards

Rex



From: Deucher, Alexander
Sent: Friday, September 14, 2018 9:40 PM
To: Zhu, Rex <Rex.Zhu at amd.com>; amd-gfx at lists.freedesktop.org
Subject: Re: [PATCH] drm/amd/dc: Trigger set power state task when display configuration changes



Acked-by: Alex Deucher <alexander.deucher at amd.com<mailto:alexander.deucher at amd.com>>

________________________________

From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org<mailto:amd-gfx-bounces at lists.freedesktop.org>> on behalf of Rex Zhu <Rex.Zhu at amd.com<mailto:Rex.Zhu at amd.com>>
Sent: Friday, September 14, 2018 1:57:07 AM
To: amd-gfx at lists.freedesktop.org<mailto:amd-gfx at lists.freedesktop.org>
Cc: Zhu, Rex
Subject: [PATCH] drm/amd/dc: Trigger set power state task when display configuration changes



Revert "drm/amd/display: Remove call to amdgpu_pm_compute_clocks"

This reverts commit dcd473770e86517543691bdb227103d6c781cd0a.

when display configuration changes, dc need to update the changes
to powerplay, also need to trigger a power state task.
amdgpu_pm_compute_clocks is the interface to set power state task
either dpm enabled or powerplay enabled

Signed-off-by: Rex Zhu <Rex.Zhu at amd.com<mailto:Rex.Zhu at amd.com>>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
index 6d16b4a..0fab64a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c
@@ -105,6 +105,8 @@ bool dm_pp_apply_display_requirements(
                         adev->powerplay.pp_funcs->display_configuration_change(
                                 adev->powerplay.pp_handle,
                                 &adev->pm.pm_display_cfg);
+
+               amdgpu_pm_compute_clocks(adev);
         }

         return true;
--
1.9.1

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