55bc60db59
Add a new "Automatic" mode to the "Broadcast RGB" range property. When selected the driver automagically selects between full range and limited range output. Based on CEA-861 [1] guidelines, limited range output is selected if the mode is a CEA mode, except 640x480. Otherwise full range output is used. Additionally DVI monitors should most likely default to full range always. As per DP1.2a [2] DisplayPort should always use full range for 18bpp, and otherwise will follow CEA-861 rules. NOTE: The default value for the property will now be "Automatic" so some people may be affected in case they're relying on the current full range default. [1] CEA-861-E - 5.1 Default Encoding Parameters [2] VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry v2: Use has_hdmi_sink to check if a HDMI monitor is present v3: Add information about relevant spec chapters Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/*
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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* Copyright (c) 2007, 2010 Intel Corporation
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* Jesse Barnes <jesse.barnes@intel.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/fb.h>
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#include <drm/drm_edid.h>
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#include <drm/drmP.h>
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#include "intel_drv.h"
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#include "i915_drv.h"
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/**
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* intel_connector_update_modes - update connector from edid
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* @connector: DRM connector device to use
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* @edid: previously read EDID information
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*/
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int intel_connector_update_modes(struct drm_connector *connector,
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struct edid *edid)
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{
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int ret;
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drm_mode_connector_update_edid_property(connector, edid);
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ret = drm_add_edid_modes(connector, edid);
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drm_edid_to_eld(connector, edid);
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return ret;
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}
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/**
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* intel_ddc_get_modes - get modelist from monitor
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* @connector: DRM connector device to use
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* @adapter: i2c adapter
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*
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* Fetch the EDID information from @connector using the DDC bus.
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*/
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int intel_ddc_get_modes(struct drm_connector *connector,
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struct i2c_adapter *adapter)
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{
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struct edid *edid;
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int ret;
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edid = drm_get_edid(connector, adapter);
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if (!edid)
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return 0;
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ret = intel_connector_update_modes(connector, edid);
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kfree(edid);
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return ret;
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}
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static const struct drm_prop_enum_list force_audio_names[] = {
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{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
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{ HDMI_AUDIO_OFF, "off" },
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{ HDMI_AUDIO_AUTO, "auto" },
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{ HDMI_AUDIO_ON, "on" },
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};
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void
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intel_attach_force_audio_property(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct drm_property *prop;
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prop = dev_priv->force_audio_property;
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if (prop == NULL) {
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prop = drm_property_create_enum(dev, 0,
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"audio",
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force_audio_names,
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ARRAY_SIZE(force_audio_names));
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if (prop == NULL)
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return;
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dev_priv->force_audio_property = prop;
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}
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drm_object_attach_property(&connector->base, prop, 0);
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}
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static const struct drm_prop_enum_list broadcast_rgb_names[] = {
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{ INTEL_BROADCAST_RGB_AUTO, "Automatic" },
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{ INTEL_BROADCAST_RGB_FULL, "Full" },
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{ INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
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};
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void
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intel_attach_broadcast_rgb_property(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct drm_property *prop;
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prop = dev_priv->broadcast_rgb_property;
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if (prop == NULL) {
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prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
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"Broadcast RGB",
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broadcast_rgb_names,
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ARRAY_SIZE(broadcast_rgb_names));
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if (prop == NULL)
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return;
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dev_priv->broadcast_rgb_property = prop;
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}
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drm_object_attach_property(&connector->base, prop, 0);
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}
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