Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
On Fri, Dec 10, 2021 at 9:42 PM Fangzhi Zuo <Jerry.Zuo@xxxxxxx> wrote:
>
> Follow-up fix for:
> drm/amd/display: Add Debugfs Entry to Force in SST Sequence
>
> Signed-off-by: Fangzhi Zuo <Jerry.Zuo@xxxxxxx>
> ---
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> index 1779c7daaf72..dc55a736e198 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> @@ -3237,8 +3237,9 @@ static int disable_hpd_get(void *data, u64 *val)
> DEFINE_DEBUGFS_ATTRIBUTE(disable_hpd_ops, disable_hpd_get,
> disable_hpd_set, "%llu\n");
>
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
> /*
> - * Force sst sequence in mst capable receiver.
> + * Temporary w/a to force sst sequence in M42D DP2 mst receiver
> * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_set_mst_en_for_sst
> */
> static int dp_force_sst_set(void *data, u64 val)
> @@ -3260,6 +3261,7 @@ static int dp_force_sst_get(void *data, u64 *val)
> }
> DEFINE_DEBUGFS_ATTRIBUTE(dp_set_mst_en_for_sst_ops, dp_force_sst_get,
> dp_force_sst_set, "%llu\n");
> +#endif
>
> /*
> * Sets the DC visual confirm debug option from the given string.
> @@ -3370,8 +3372,10 @@ void dtn_debugfs_init(struct amdgpu_device *adev)
> adev, &mst_topo_fops);
> debugfs_create_file("amdgpu_dm_dtn_log", 0644, root, adev,
> &dtn_log_fops);
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
> debugfs_create_file("amdgpu_dm_dp_set_mst_en_for_sst", 0644, root, adev,
> &dp_set_mst_en_for_sst_ops);
> +#endif
>
> debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev,
> &visual_confirm_fops);
> --
> 2.25.1
>
