[net-next-2.6.git] / drivers / gpu / drm / i915 / intel_modes.c

/*
 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
 * Copyright (c) 2007, 2010 Intel Corporation
 *   Jesse Barnes <jesse.barnes@intel.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/fb.h>
#include "drmP.h"
#include "intel_drv.h"
#include "i915_drv.h"

/**
 * intel_ddc_probe
 *
 */
bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
{
	struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
	u8 out_buf[] = { 0x0, 0x0};
	u8 buf[2];
	struct i2c_msg msgs[] = {
		{
			.addr = 0x50,
			.flags = 0,
			.len = 1,
			.buf = out_buf,
		},
		{
			.addr = 0x50,
			.flags = I2C_M_RD,
			.len = 1,
			.buf = buf,
		}
	};

	return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2;
}

/**
 * intel_ddc_get_modes - get modelist from monitor
 * @connector: DRM connector device to use
 * @adapter: i2c adapter
 *
 * Fetch the EDID information from @connector using the DDC bus.
 */
int intel_ddc_get_modes(struct drm_connector *connector,
			struct i2c_adapter *adapter)
{
	struct edid *edid;
	int ret = 0;

	edid = drm_get_edid(connector, adapter);
	if (edid) {
		drm_mode_connector_update_edid_property(connector, edid);
		ret = drm_add_edid_modes(connector, edid);
		connector->display_info.raw_edid = NULL;
		kfree(edid);
	}

	return ret;
}
Commit	Line	Data
79e53945 JB	1	/*
79e53945 JB	2	* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
f899fc64	3	* Copyright (c) 2007, 2010 Intel Corporation
79e53945 JB	4	* Jesse Barnes <jesse.barnes@intel.com>
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the "Software"),
	8	* to deal in the Software without restriction, including without limitation
	9	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	10	* and/or sell copies of the Software, and to permit persons to whom the
	11	* Software is furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice (including the next
	14	* paragraph) shall be included in all copies or substantial portions of the
	15	* Software.
	16	*
	17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	18	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	20	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	21	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	22	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	23	* DEALINGS IN THE SOFTWARE.
	24	*/
	25
5a0e3ad6	26	#include <linux/slab.h>
79e53945 JB	27	#include <linux/i2c.h>
	28	#include <linux/fb.h>
	29	#include "drmP.h"
	30	#include "intel_drv.h"
0ba0e9e1	31	#include "i915_drv.h"
79e53945 JB	32
	33	/**
	34	* intel_ddc_probe
	35	*
	36	*/
f899fc64	37	bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
79e53945	38	{
f899fc64	39	struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
79e53945 JB	40	u8 out_buf[] = { 0x0, 0x0};
79e53945 JB	41	u8 buf[2];
79e53945 JB	42	struct i2c_msg msgs[] = {
	43	{
	44	.addr = 0x50,
	45	.flags = 0,
	46	.len = 1,
	47	.buf = out_buf,
	48	},
	49	{
	50	.addr = 0x50,
	51	.flags = I2C_M_RD,
	52	.len = 1,
	53	.buf = buf,
	54	}
	55	};
	56
f899fc64	57	return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2;
79e53945 JB	58	}
	59
	60	/**
	61	* intel_ddc_get_modes - get modelist from monitor
	62	* @connector: DRM connector device to use
335af9a2	63	* @adapter: i2c adapter
79e53945 JB	64	*
	65	* Fetch the EDID information from @connector using the DDC bus.
	66	*/
335af9a2 ZW	67	int intel_ddc_get_modes(struct drm_connector *connector,
335af9a2 ZW	68	struct i2c_adapter *adapter)
79e53945 JB	69	{
	70	struct edid *edid;
	71	int ret = 0;
	72
335af9a2	73	edid = drm_get_edid(connector, adapter);
79e53945	74	if (edid) {
335af9a2 ZW	75	drm_mode_connector_update_edid_property(connector, edid);
	76	ret = drm_add_edid_modes(connector, edid);
	77	connector->display_info.raw_edid = NULL;
79e53945 JB	78	kfree(edid);
	79	}
	80
	81	return ret;
	82	}