Hi 2013/1/16 <ville.syrjala at linux.intel.com>: > From: Ville Syrj?l? <ville.syrjala at linux.intel.com> > > The RGB color range select bit on the DP/SDVO/HDMI registers > disappeared when PCH was introduced, and instead a new PIPECONF bit > was added that performs the same function. > > Add a new INTEL_MODE_LIMITED_COLOR_RANGE private mode flag, and set > it in the encoder mode_fixup if limited color range is requested. > Set the the PIPECONF bit 13 based on the flag. > > Experimentation showed that simply toggling the bit while the pipe is > active doesn't work. We need to restart the pipe, which luckily already > happens. > > The DP/SDVO/HDMI bit 8 is marked MBZ in the docs, so avoid setting it, > although it doesn't seem to do any harm in practice. > > TODO: > - the PIPECONF bit too seems to have disappeared from HSW. Need a > volunteer to test if it's just a documentation issue or if it's really > gone. If the bit is gone and no easy replacement is found, then I suppose > we may need to use the pipe CSC unit to perform the range compression. > > v2: Use mode private_flags instead of intel_encoder virtual functions > v3: Moved the intel_dp color_range handling after bpc check to help > later patches Things look correct. As you mention, the only problem seems to be the Haswell. I could not find anything on the specs, so I think we should send some emails and maybe consider removing the property on Haswell? If-you-promise-to-find-a-solution-for-the-Haswell-case: Reviewed-by: Paulo Zanoni <paulo.r.zanoni at intel.com> > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=46800 > Signed-off-by: Ville Syrj?l? <ville.syrjala at linux.intel.com> > --- > drivers/gpu/drm/i915/i915_reg.h | 1 + > drivers/gpu/drm/i915/intel_display.c | 5 +++++ > drivers/gpu/drm/i915/intel_dp.c | 7 ++++++- > drivers/gpu/drm/i915/intel_drv.h | 5 +++++ > drivers/gpu/drm/i915/intel_hdmi.c | 5 +++++ > drivers/gpu/drm/i915/intel_sdvo.c | 5 ++++- > 6 files changed, 26 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h > index 36789bf..a2550c5 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -2652,6 +2652,7 @@ > #define PIPECONF_INTERLACED_DBL_ILK (4 << 21) /* ilk/snb only */ > #define PIPECONF_PFIT_PF_INTERLACED_DBL_ILK (5 << 21) /* ilk/snb only */ > #define PIPECONF_CXSR_DOWNCLOCK (1<<16) > +#define PIPECONF_COLOR_RANGE_SELECT (1 << 13) > #define PIPECONF_BPC_MASK (0x7 << 5) > #define PIPECONF_8BPC (0<<5) > #define PIPECONF_10BPC (1<<5) > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c > index c7313f8..f48f698 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -5097,6 +5097,11 @@ static void ironlake_set_pipeconf(struct drm_crtc *crtc, > else > val |= PIPECONF_PROGRESSIVE; > > + if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE) > + val |= PIPECONF_COLOR_RANGE_SELECT; > + else > + val &= ~PIPECONF_COLOR_RANGE_SELECT; > + > I915_WRITE(PIPECONF(pipe), val); > POSTING_READ(PIPECONF(pipe)); > } > diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c > index cf25481..64824d0 100644 > --- a/drivers/gpu/drm/i915/intel_dp.c > +++ b/drivers/gpu/drm/i915/intel_dp.c > @@ -763,6 +763,10 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, > return false; > > bpp = adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24; > + > + if (intel_dp->color_range) > + adjusted_mode->private_flags |= INTEL_MODE_LIMITED_COLOR_RANGE; > + > mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp); > > for (clock = 0; clock <= max_clock; clock++) { > @@ -967,7 +971,8 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, > else > intel_dp->DP |= DP_PLL_FREQ_270MHZ; > } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { > - intel_dp->DP |= intel_dp->color_range; > + if (!HAS_PCH_SPLIT(dev)) > + intel_dp->DP |= intel_dp->color_range; > > if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) > intel_dp->DP |= DP_SYNC_HS_HIGH; > diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h > index 54a034c..4df47be 100644 > --- a/drivers/gpu/drm/i915/intel_drv.h > +++ b/drivers/gpu/drm/i915/intel_drv.h > @@ -109,6 +109,11 @@ > * timings in the mode to prevent the crtc fixup from overwriting them. > * Currently only lvds needs that. */ > #define INTEL_MODE_CRTC_TIMINGS_SET (0x20) > +/* > + * Set when limited 16-235 (as opposed to full 0-255) RGB color range is > + * to be used. > + */ > +#define INTEL_MODE_LIMITED_COLOR_RANGE (0x40) > > static inline void > intel_mode_set_pixel_multiplier(struct drm_display_mode *mode, > diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c > index 6387f9b..f194d75 100644 > --- a/drivers/gpu/drm/i915/intel_hdmi.c > +++ b/drivers/gpu/drm/i915/intel_hdmi.c > @@ -766,6 +766,11 @@ bool intel_hdmi_mode_fixup(struct drm_encoder *encoder, > const struct drm_display_mode *mode, > struct drm_display_mode *adjusted_mode) > { > + struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder); > + > + if (intel_hdmi->color_range) > + adjusted_mode->private_flags |= INTEL_MODE_LIMITED_COLOR_RANGE; > + > return true; > } > > diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c > index 153377b..3b8491a 100644 > --- a/drivers/gpu/drm/i915/intel_sdvo.c > +++ b/drivers/gpu/drm/i915/intel_sdvo.c > @@ -1064,6 +1064,9 @@ static bool intel_sdvo_mode_fixup(struct drm_encoder *encoder, > multiplier = intel_sdvo_get_pixel_multiplier(adjusted_mode); > intel_mode_set_pixel_multiplier(adjusted_mode, multiplier); > > + if (intel_sdvo->color_range) > + adjusted_mode->private_flags |= INTEL_MODE_LIMITED_COLOR_RANGE; > + > return true; > } > > @@ -1153,7 +1156,7 @@ static void intel_sdvo_mode_set(struct drm_encoder *encoder, > /* The real mode polarity is set by the SDVO commands, using > * struct intel_sdvo_dtd. */ > sdvox = SDVO_VSYNC_ACTIVE_HIGH | SDVO_HSYNC_ACTIVE_HIGH; > - if (intel_sdvo->is_hdmi) > + if (!HAS_PCH_SPLIT(dev) && intel_sdvo->is_hdmi) > sdvox |= intel_sdvo->color_range; > if (INTEL_INFO(dev)->gen < 5) > sdvox |= SDVO_BORDER_ENABLE; > -- > 1.7.8.6 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Paulo Zanoni
