From cae154fcaefeb1ddab491d6fb651452a93bbf81d Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Thu, 18 Jul 2019 19:45:23 +0300 Subject: [PATCH] drm/i915: Never set limited_color_range=true for YCbCr output MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit crtc_state->limited_color_range only applies to RGB output but we're currently setting it even for YCbCr output. That will lead to conflicting MSA and PIPECONF settings which can mess up the image. Let's make sure limited_color_range stays unset with YCbCr output. Also WARN if we end up with such a bogus combination when programming the MSA MISC bits as it's impossible to even indicate quantization rangle for YCbCr via MSA MISC. YCbCr output is simply assumed to be limited range always. Note that VSC SDP does provide a mechanism for full range YCbCr, so in the future we may want to rethink how we compute/store this state. And for good measure we add the same WARN to the HDMI path. v2: s/==/!=/ in the HDMI WARN Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190718164523.11738-1-ville.syrjala@linux.intel.com Reviewed-by: Gwan-gyeong Mun --- drivers/gpu/drm/i915/display/intel_ddi.c | 10 +++++++--- drivers/gpu/drm/i915/display/intel_dp.c | 10 ++++++++++ drivers/gpu/drm/i915/display/intel_hdmi.c | 20 +++++++++++++++++--- 3 files changed, 34 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index fb6cb6a..0c0da9f 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -1706,9 +1706,6 @@ void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state) temp = TRANS_MSA_SYNC_CLK; - if (crtc_state->limited_color_range) - temp |= TRANS_MSA_CEA_RANGE; - switch (crtc_state->pipe_bpp) { case 18: temp |= TRANS_MSA_6_BPC; @@ -1727,6 +1724,13 @@ void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state) break; } + /* nonsense combination */ + WARN_ON(crtc_state->limited_color_range && + crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB); + + if (crtc_state->limited_color_range) + temp |= TRANS_MSA_CEA_RANGE; + /* * As per DP 1.2 spec section 2.3.4.3 while sending * YCBCR 444 signals we should program MSA MISC1/0 fields with diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 0c7755e..5cce945 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2150,6 +2150,16 @@ bool intel_dp_limited_color_range(const struct intel_crtc_state *crtc_state, const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode; + /* + * Our YCbCr output is always limited range. + * crtc_state->limited_color_range only applies to RGB, + * and it must never be set for YCbCr or we risk setting + * some conflicting bits in PIPECONF which will mess up + * the colors on the monitor. + */ + if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB) + return false; + if (intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_AUTO) { /* * See: diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index b781e0d..5ab7333 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -724,6 +724,10 @@ intel_hdmi_compute_avi_infoframe(struct intel_encoder *encoder, drm_hdmi_avi_infoframe_colorspace(frame, conn_state); + /* nonsense combination */ + WARN_ON(crtc_state->limited_color_range && + crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB); + if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB) { drm_hdmi_avi_infoframe_quant_range(frame, connector, adjusted_mode, @@ -2373,6 +2377,16 @@ static bool intel_hdmi_limited_color_range(const struct intel_crtc_state *crtc_s const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode; + /* + * Our YCbCr output is always limited range. + * crtc_state->limited_color_range only applies to RGB, + * and it must never be set for YCbCr or we risk setting + * some conflicting bits in PIPECONF which will mess up + * the colors on the monitor. + */ + if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB) + return false; + if (intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_AUTO) { /* See CEA-861-E - 5.1 Default Encoding Parameters */ return crtc_state->has_hdmi_sink && @@ -2406,9 +2420,6 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder, if (pipe_config->has_hdmi_sink) pipe_config->has_infoframe = true; - pipe_config->limited_color_range = - intel_hdmi_limited_color_range(pipe_config, conn_state); - if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) pipe_config->pixel_multiplier = 2; @@ -2419,6 +2430,9 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder, } } + pipe_config->limited_color_range = + intel_hdmi_limited_color_range(pipe_config, conn_state); + if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv)) pipe_config->has_pch_encoder = true; -- 2.7.4