[AMD Official Use Only - Internal Distribution Only]
>
>-----Original Message-----
>From: Liu, Zhan <Zhan.Liu@xxxxxxx>
>Sent: Sunday, May 9, 2021 10:30 PM
>To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx; Liu, Zhan <Zhan.Liu@xxxxxxx>; Cornij, Nikola <Nikola.Cornij@xxxxxxx>
>Subject: [PATCH] drm/amd/display: Avoid HPD IRQ in GPU reset state
>
>[Why]
>If GPU is in reset state, force enabling link will cause unexpected behaviour.
>
>[How]
>Avoid handling HPD IRQ when GPU is in reset state.
>
>Signed-off-by: Zhan Liu <zhan.liu@xxxxxxx>
>Change-Id: I29d80501e44096068e98b5d5984e63822dfcef82
>---
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
>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 cc048c348a92..58b59152a8be 100644
>--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>@@ -2769,15 +2769,15 @@ static void handle_hpd_rx_irq(void *param)
> }
> }
>
>- if (!amdgpu_in_reset(adev))
>+ if (!amdgpu_in_reset(adev)) {
> mutex_lock(&adev->dm.dc_lock);
> #ifdef CONFIG_DRM_AMD_DC_HDCP
> result = dc_link_handle_hpd_rx_irq(dc_link, &hpd_irq_data, NULL); #else
> result = dc_link_handle_hpd_rx_irq(dc_link, NULL, NULL); #endif
>- if (!amdgpu_in_reset(adev))
> mutex_unlock(&adev->dm.dc_lock);
>+ }
>
> out:
> if (result && !is_mst_root_connector) {
>--
>2.25.1
>
>
Reviewed-by: Nikola Cornij <nikola.cornij@xxxxxxx>
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