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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3bd7d90938
Instead of letting other modules directly access the ->gmbus array, introduce intel_gmbus_get_adapter() for looking up an i2c_adapter for a given gmbus port identifier. This will enable later refactoring of the gmbus port list. Note: Before requesting an adapter for a given gmbus port number, the driver must first check its validity using i2c_intel_gmbus_is_port_valid(). If this check fails, a call to intel_gmbus_get_adapter() will WARN_ON and return NULL. This is relevant for parts of the driver that read a port from VBIOS, which might be improperly initialized and contain an invalid port. In these cases, the driver must fall back to using a safer default port. Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
141 lines
3.8 KiB
C
141 lines
3.8 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 "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_ddc_probe
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*
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*/
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bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
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{
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struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
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u8 out_buf[] = { 0x0, 0x0};
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u8 buf[2];
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struct i2c_msg msgs[] = {
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{
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.addr = 0x50,
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.flags = 0,
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.len = 1,
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.buf = out_buf,
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},
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{
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.addr = 0x50,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = buf,
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}
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};
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return i2c_transfer(intel_gmbus_get_adapter(dev_priv, ddc_bus),
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msgs, 2) == 2;
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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 = 0;
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edid = drm_get_edid(connector, adapter);
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if (edid) {
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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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connector->display_info.raw_edid = NULL;
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kfree(edid);
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}
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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_connector_attach_property(connector, prop, 0);
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}
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static const struct drm_prop_enum_list broadcast_rgb_names[] = {
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{ 0, "Full" },
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{ 1, "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_connector_attach_property(connector, prop, 0);
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}
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