[PATCH] drm/amd/display: Fix p-state allow debug index on dcn31

[Harry Wentland]

On 2022-03-18 15:00, Nicholas Kazlauskas wrote:
> [Why]
> It changed since dcn30 but the hubbub31 constructor hasn't been
> modified to reflect this.
> 
> [How]
> Update the value in the constructor to 0x6 so we're checking the right
> bits for p-state allow.
> 
> It worked before by accident, but can falsely assert 0 depending on HW
> state transitions. The most frequent of which appears to be when
> all pipes turn off during IGT tests.
> 
> Cc: Harry Wentland <harry.wentland at amd.com>
> Fixes: d158560fc0e1 ("drm/amd/display: Add pstate verification and recovery for DCN31")
> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
> Reviewed-by: Eric Yang <Eric.Yang2 at amd.com>

Acked-by: Harry Wentland <harry.wentland at amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
> index 3e6d6ebd199e..51c5f3685470 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
> @@ -1042,5 +1042,7 @@ void hubbub31_construct(struct dcn20_hubbub *hubbub31,
>  	hubbub31->detile_buf_size = det_size_kb * 1024;
>  	hubbub31->pixel_chunk_size = pixel_chunk_size_kb * 1024;
>  	hubbub31->crb_size_segs = config_return_buffer_size_kb / DCN31_CRB_SEGMENT_SIZE_KB;
> +
> +	hubbub31->debug_test_index_pstate = 0x6;
>  }
>