[PATCH] drm/amd/display: Don't fill up the logs

[Luben Tuikov]

I could, but if they enable KMS debug, this prints 100s of times a second.
It literally overflows the log. It needs to be printed "ONCE" in whichever mode.
Either that, or not print it at all--it is "DEBUG" after all.

Regards,
Luben

On 2022-02-24 17:21, Alex Deucher wrote:
> On Thu, Feb 24, 2022 at 4:46 PM Luben Tuikov <luben.tuikov at amd.com> wrote:
>>
>> Don't fill up the logs with:
>>
>> [253557.859575] [drm:amdgpu_dm_atomic_check [amdgpu]] DSC precompute is not needed.
>> [253557.892966] [drm:amdgpu_dm_atomic_check [amdgpu]] DSC precompute is not needed.
>> [253557.926070] [drm:amdgpu_dm_atomic_check [amdgpu]] DSC precompute is not needed.
>> [253557.959344] [drm:amdgpu_dm_atomic_check [amdgpu]] DSC precompute is not needed.
>>
>> which prints many times a second, when the kernel is run with
>> drm.debug=2.
>>
>> Instead of DRM_DEBUG_DRIVER(), make it DRM_INFO_ONCE().
> 
> Maybe convert to DRM_DEBUG_KMS() for consistency with the rest of the
> display code?
> 
> Alex
> 
>>
>> Cc: Alex Deucher <Alexander.Deucher at amd.com>
>> Cc: Roman Li <Roman.Li at amd.com>
>> Cc: Felix Kuehling <felix.kuehling at amd.com>
>> Cc: Hersen Wu <hersenwu at amd.com>
>> Cc: Daniel Wheeler <daniel.wheeler at amd.com>
>> Fixes: 5898243ba7acdb ("drm/amd/display: Add dsc pre-validation in atomic check")
>> Signed-off-by: Luben Tuikov <luben.tuikov at amd.com>
>> ---
>>  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c   | 8 ++++----
>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
>> index 05573f073b21f7..0542034530b1b0 100644
>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
>> @@ -1198,11 +1198,11 @@ void pre_validate_dsc(struct drm_atomic_state *state,
>>         struct dc_state *local_dc_state = NULL;
>>
>>         if (!is_dsc_precompute_needed(state)) {
>> -               DRM_DEBUG_DRIVER("DSC precompute is not needed.\n");
>> +               DRM_INFO_ONCE("DSC precompute is not needed.\n");
>>                 return;
>>         }
>>         if (dm_atomic_get_state(state, dm_state_ptr)) {
>> -               DRM_DEBUG_DRIVER("dm_atomic_get_state() failed\n");
>> +               DRM_INFO_ONCE("dm_atomic_get_state() failed\n");
>>                 return;
>>         }
>>         dm_state = *dm_state_ptr;
>> @@ -1245,7 +1245,7 @@ void pre_validate_dsc(struct drm_atomic_state *state,
>>         }
>>
>>         if (!pre_compute_mst_dsc_configs_for_state(state, local_dc_state, vars)) {
>> -               DRM_DEBUG_DRIVER("pre_compute_mst_dsc_configs_for_state() failed\n");
>> +               DRM_INFO_ONCE("pre_compute_mst_dsc_configs_for_state() failed\n");
>>                 goto clean_exit;
>>         }
>>
>> @@ -1258,7 +1258,7 @@ void pre_validate_dsc(struct drm_atomic_state *state,
>>
>>                 if (local_dc_state->streams[i] &&
>>                     is_timing_changed(stream, local_dc_state->streams[i])) {
>> -                       DRM_DEBUG_DRIVER("crtc[%d] needs mode_changed\n", i);
>> +                       DRM_INFO_ONCE("crtc[%d] needs mode_changed\n", i);
>>                 } else {
>>                         int ind = find_crtc_index_in_state_by_stream(state, stream);
>>
>>
>> base-commit: bff980c7632ef3b0099ba230cf7d5c864db3e1a3
>> --
>> 2.35.1.129.gb80121027d
>>

Regards,
-- 
Luben