Em Ter, 2017-03-14 às 15:45 -0700, Dhinakaran Pandiyan escreveu:
> According to BSpec, "The CD clock frequency must be at least twice
> the
> frequency of the Azalia BCLK." and BCLK is configured to 96 MHz by
> default. This check is needed because BXT and GLK support cdclk
> frequencies less than 192 MHz.
>
> v2: Include other Gen9 platforms too for completeness.(Paulo)
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
>
> Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_cdclk.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_cdclk.c
> b/drivers/gpu/drm/i915/intel_cdclk.c
> index dd350642..dd3ad52 100644
> --- a/drivers/gpu/drm/i915/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/intel_cdclk.c
> @@ -1458,6 +1458,18 @@ static int
> bdw_adjust_min_pipe_pixel_rate(struct intel_crtc_state *crtc_state,
> pixel_rate = max(432000, pixel_rate);
> }
>
> + /* According to BSpec, "The CD clock frequency must be at
> least twice
> + * the frequency of the Azalia BCLK." and BCLK is 96 MHz by
> default.
> + * The check for GLK has to be adjusted as the platform can
> output
> + * two pixels per clock.
> + */
> + if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9) {
> + if (IS_GEMINILAKE(dev_priv))
> + pixel_rate = max(2 * 2 * 96000, pixel_rate);
> + else
> + pixel_rate = max(2 * 96000, pixel_rate);
> + }
> +
> return pixel_rate;
> }
>
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
