[PATCH] drm/amdgpu/vcn: improve vcn dpg stop procedure

[Zhu, James]

[AMD Official Use Only]

This patch is Reviewed-by: James Zhu <James.Zhu at amd.com>


________________________________
From: Tianci Yin <tianci.yin at amd.com>
Sent: Wednesday, March 23, 2022 12:01 PM
To: amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>
Cc: Chen, Guchun <Guchun.Chen at amd.com>; Zhu, James <James.Zhu at amd.com>; Wang, Yu (Charlie) <Yu.Wang4 at amd.com>; Yin, Tianci (Rico) <Tianci.Yin at amd.com>
Subject: [PATCH] drm/amdgpu/vcn: improve vcn dpg stop procedure

Prior to disabling dpg, VCN need unpausing dpg mode, or VCN will hang in
S3 resuming.

Signed-off-by: Tianci Yin <tianci.yin at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
index b16c56aa2d22..0d590183328f 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
@@ -1480,8 +1480,11 @@ static int vcn_v3_0_start_sriov(struct amdgpu_device *adev)

 static int vcn_v3_0_stop_dpg_mode(struct amdgpu_device *adev, int inst_idx)
 {
+       struct dpg_pause_state state = {.fw_based = VCN_DPG_STATE__UNPAUSE};
         uint32_t tmp;

+       vcn_v3_0_pause_dpg_mode(adev, 0, &state);
+
         /* Wait for power status to be 1 */
         SOC15_WAIT_ON_RREG(VCN, inst_idx, mmUVD_POWER_STATUS, 1,
                 UVD_POWER_STATUS__UVD_POWER_STATUS_MASK);
--
2.25.1

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