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 <[email protected]> > > Cc: Paulo Zanoni <[email protected]> > Signed-off-by: Dhinakaran Pandiyan <[email protected]> > --- > 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 [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
