Re: [PATCH] drm/amdgpu/dm/mst: Fix incorrect usage of drm_dp_add_payload_part2()

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On 2022-10-04 16:24, Lyude Paul wrote:
Yikes, it appears somehow I totally made a mistake here. We're currently
checking to see if drm_dp_add_payload_part2() returns a non-zero value to
indicate success. That's totally wrong though, as this function only
returns a zero value on success - not the other way around.

So, fix that.

Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
Issue: https://gitlab.freedesktop.org/drm/amd/-/issues/2171
Fixes: 4d07b0bc4034 ("drm/display/dp_mst: Move all payload info into the atomic state")
---
  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index b8077fcd4651..00598def5b39 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -297,7 +297,7 @@ bool dm_helpers_dp_mst_send_payload_allocation(
  		clr_flag = MST_ALLOCATE_NEW_PAYLOAD;
  	}
- if (enable && drm_dp_add_payload_part2(mst_mgr, mst_state->base.state, payload)) {
+	if (enable && drm_dp_add_payload_part2(mst_mgr, mst_state->base.state, payload) == 0) {
  		amdgpu_dm_set_mst_status(&aconnector->mst_status,
  			set_flag, false);
  	} else {

Hi Lyude,

Maybe I'm missing something, but I can't find the drm_dp_add_payload_part2() function on amd-staging-drm-next. Which repo are you using?

Thanks
Siqueira




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