On 1/24/2024 11:09, Roman.Li@xxxxxxx wrote:
From: Roman Li <Roman.Li@xxxxxxx>
[Why]
While in IPS2 an access to dcn registers is not allowed.
If interrupt results in dc call, we should disable IPS.
[How]
Safeguard register access in IPS2 by disabling idle optimization
before calling dc interrupt setting api.
Signed-off-by: Roman Li <Roman.Li@xxxxxxx>
Tested-by: Mark Broadworth <mark.broadworth@xxxxxxx>
Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
index 58b880acb087..3390f0d8420a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
@@ -711,7 +711,7 @@ static inline int dm_irq_state(struct amdgpu_device *adev,
{
bool st;
enum dc_irq_source irq_source;
-
+ struct dc *dc = adev->dm.dc;
struct amdgpu_crtc *acrtc = adev->mode_info.crtcs[crtc_id];
if (!acrtc) {
@@ -729,6 +729,9 @@ static inline int dm_irq_state(struct amdgpu_device *adev,
st = (state == AMDGPU_IRQ_STATE_ENABLE);
+ if (dc && dc->caps.ips_support && dc->idle_optimizations_allowed)
+ dc_allow_idle_optimizations(dc, false);
+
dc_interrupt_set(adev->dm.dc, irq_source, st);
return 0;
}
