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

/*
 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
 * Copyright (c) 2007 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_output *intel_output)
{
	u8 out_buf[] = { 0x0, 0x0};
	u8 buf[2];
	int ret;
	struct i2c_msg msgs[] = {
		{
			.addr = 0x50,
			.flags = 0,
			.len = 1,
			.buf = out_buf,
		},
		{
			.addr = 0x50,
			.flags = I2C_M_RD,
			.len = 1,
			.buf = buf,
		}
	};

	intel_i2c_quirk_set(intel_output->base.dev, true);
	ret = i2c_transfer(intel_output->ddc_bus, msgs, 2);
	intel_i2c_quirk_set(intel_output->base.dev, false);
	if (ret == 2)
		return true;

	return false;
}

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

	intel_i2c_quirk_set(intel_output->base.dev, true);
	edid = drm_get_edid(&intel_output->base, intel_output->ddc_bus);
	intel_i2c_quirk_set(intel_output->base.dev, false);
	if (edid) {
		drm_mode_connector_update_edid_property(&intel_output->base,
							edid);
		ret = drm_add_edid_modes(&intel_output->base, edid);
		intel_output->base.display_info.raw_edid = NULL;
		kfree(edid);
	}

	return ret;
}
Commit	Line	Data
79e53945 JB	1	/*
	2	* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
	3	* Copyright (c) 2007 Intel Corporation
	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	*/
	37	bool intel_ddc_probe(struct intel_output *intel_output)
	38	{
	39	u8 out_buf[] = { 0x0, 0x0};
	40	u8 buf[2];
	41	int ret;
	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
f9c10a9b KP	57	intel_i2c_quirk_set(intel_output->base.dev, true);
	58	ret = i2c_transfer(intel_output->ddc_bus, msgs, 2);
	59	intel_i2c_quirk_set(intel_output->base.dev, false);
79e53945 JB	60	if (ret == 2)
	61	return true;
	62
	63	return false;
	64	}
	65
	66	/**
	67	* intel_ddc_get_modes - get modelist from monitor
	68	* @connector: DRM connector device to use
	69	*
	70	* Fetch the EDID information from @connector using the DDC bus.
	71	*/
	72	int intel_ddc_get_modes(struct intel_output *intel_output)
	73	{
	74	struct edid *edid;
	75	int ret = 0;
	76
f9c10a9b KP	77	intel_i2c_quirk_set(intel_output->base.dev, true);
	78	edid = drm_get_edid(&intel_output->base, intel_output->ddc_bus);
	79	intel_i2c_quirk_set(intel_output->base.dev, false);
79e53945 JB	80	if (edid) {
	81	drm_mode_connector_update_edid_property(&intel_output->base,
	82	edid);
	83	ret = drm_add_edid_modes(&intel_output->base, edid);
6b731a65	84	intel_output->base.display_info.raw_edid = NULL;
79e53945 JB	85	kfree(edid);
	86	}
	87
	88	return ret;
	89	}