On Thu, Jan 17, 2013 at 04:31:31PM +0200, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrj?l? <ville.syrjala at linux.intel.com>
>
> The AVI infoframe is able to inform the display whether the source is
> sending full or limited range RGB data.
>
> As per CEA-861 [1] we must first check whether the display reports the
> quantization range as selectable, and if so we can set the approriate
> bits in the AVI inforframe.
>
> [1] CEA-861-E - 6.4 Format of Version 2 AVI InfoFrame
>
> v2: Give the Q bits better names, add spec chapter information
>
> Reviewed-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Signed-off-by: Ville Syrj?l? <ville.syrjala at linux.intel.com>
Entire series queued for -next, thanks for patches&review.
-Daniel
> ---
> drivers/gpu/drm/i915/intel_drv.h | 4 ++++
> drivers/gpu/drm/i915/intel_hdmi.c | 11 +++++++++++
> drivers/gpu/drm/i915/intel_sdvo.c | 16 ++++++++++++++--
> 3 files changed, 29 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 1a698c6..aeff0d1 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -289,6 +289,9 @@ struct cxsr_latency {
> #define DIP_LEN_AVI 13
> #define DIP_AVI_PR_1 0
> #define DIP_AVI_PR_2 1
> +#define DIP_AVI_RGB_QUANT_RANGE_DEFAULT (0 << 2)
> +#define DIP_AVI_RGB_QUANT_RANGE_LIMITED (1 << 2)
> +#define DIP_AVI_RGB_QUANT_RANGE_FULL (2 << 2)
>
> #define DIP_TYPE_SPD 0x83
> #define DIP_VERSION_SPD 0x1
> @@ -347,6 +350,7 @@ struct intel_hdmi {
> bool has_hdmi_sink;
> bool has_audio;
> enum hdmi_force_audio force_audio;
> + bool rgb_quant_range_selectable;
> void (*write_infoframe)(struct drm_encoder *encoder,
> struct dip_infoframe *frame);
> void (*set_infoframes)(struct drm_encoder *encoder,
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index db67be6..d53b731 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -331,6 +331,7 @@ static void intel_set_infoframe(struct drm_encoder *encoder,
> static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
> struct drm_display_mode *adjusted_mode)
> {
> + struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
> struct dip_infoframe avi_if = {
> .type = DIP_TYPE_AVI,
> .ver = DIP_VERSION_AVI,
> @@ -340,6 +341,13 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
> if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
> avi_if.body.avi.YQ_CN_PR |= DIP_AVI_PR_2;
>
> + if (intel_hdmi->rgb_quant_range_selectable) {
> + if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE)
> + avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_RGB_QUANT_RANGE_LIMITED;
> + else
> + avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_RGB_QUANT_RANGE_FULL;
> + }
> +
> avi_if.body.avi.VIC = drm_mode_cea_vic(adjusted_mode);
>
> intel_set_infoframe(encoder, &avi_if);
> @@ -825,6 +833,7 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
>
> intel_hdmi->has_hdmi_sink = false;
> intel_hdmi->has_audio = false;
> + intel_hdmi->rgb_quant_range_selectable = false;
> edid = drm_get_edid(connector,
> intel_gmbus_get_adapter(dev_priv,
> intel_hdmi->ddc_bus));
> @@ -836,6 +845,8 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
> intel_hdmi->has_hdmi_sink =
> drm_detect_hdmi_monitor(edid);
> intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
> + intel_hdmi->rgb_quant_range_selectable =
> + drm_rgb_quant_range_selectable(edid);
> }
> kfree(edid);
> }
> diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
> index 3e34a35..f01063a 100644
> --- a/drivers/gpu/drm/i915/intel_sdvo.c
> +++ b/drivers/gpu/drm/i915/intel_sdvo.c
> @@ -126,6 +126,7 @@ struct intel_sdvo {
> bool is_hdmi;
> bool has_hdmi_monitor;
> bool has_hdmi_audio;
> + bool rgb_quant_range_selectable;
>
> /**
> * This is set if we detect output of sdvo device as LVDS and
> @@ -947,7 +948,8 @@ static bool intel_sdvo_write_infoframe(struct intel_sdvo *intel_sdvo,
> &tx_rate, 1);
> }
>
> -static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo)
> +static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo,
> + const struct drm_display_mode *adjusted_mode)
> {
> struct dip_infoframe avi_if = {
> .type = DIP_TYPE_AVI,
> @@ -956,6 +958,13 @@ static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo)
> };
> uint8_t sdvo_data[4 + sizeof(avi_if.body.avi)];
>
> + if (intel_sdvo->rgb_quant_range_selectable) {
> + if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE)
> + avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_RGB_QUANT_RANGE_LIMITED;
> + else
> + avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_RGB_QUANT_RANGE_FULL;
> + }
> +
> intel_dip_infoframe_csum(&avi_if);
>
> /* sdvo spec says that the ecc is handled by the hw, and it looks like
> @@ -1134,7 +1143,7 @@ static void intel_sdvo_mode_set(struct drm_encoder *encoder,
> intel_sdvo_set_encode(intel_sdvo, SDVO_ENCODE_HDMI);
> intel_sdvo_set_colorimetry(intel_sdvo,
> SDVO_COLORIMETRY_RGB256);
> - intel_sdvo_set_avi_infoframe(intel_sdvo);
> + intel_sdvo_set_avi_infoframe(intel_sdvo, adjusted_mode);
> } else
> intel_sdvo_set_encode(intel_sdvo, SDVO_ENCODE_DVI);
>
> @@ -1526,6 +1535,8 @@ intel_sdvo_tmds_sink_detect(struct drm_connector *connector)
> if (intel_sdvo->is_hdmi) {
> intel_sdvo->has_hdmi_monitor = drm_detect_hdmi_monitor(edid);
> intel_sdvo->has_hdmi_audio = drm_detect_monitor_audio(edid);
> + intel_sdvo->rgb_quant_range_selectable =
> + drm_rgb_quant_range_selectable(edid);
> }
> } else
> status = connector_status_disconnected;
> @@ -1577,6 +1588,7 @@ intel_sdvo_detect(struct drm_connector *connector, bool force)
>
> intel_sdvo->has_hdmi_monitor = false;
> intel_sdvo->has_hdmi_audio = false;
> + intel_sdvo->rgb_quant_range_selectable = false;
>
> if ((intel_sdvo_connector->output_flag & response) == 0)
> ret = connector_status_disconnected;
> --
> 1.7.8.6
>
> _______________________________________________
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> dri-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
