path: root/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

/*
 * Copyright 2015 Advanced Micro Devices, Inc.
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Authors: AMD
 *
 */

#include <linux/string.h>
#include <linux/acpi.h>
#include <linux/i2c.h>

#include <drm/drm_atomic.h>
#include <drm/drm_probe_helper.h>
#include <drm/amdgpu_drm.h>
#include <drm/drm_edid.h>
#include <drm/drm_fixed.h>

#include "dm_services.h"
#include "amdgpu.h"
#include "dc.h"
#include "amdgpu_dm.h"
#include "amdgpu_dm_irq.h"
#include "amdgpu_dm_mst_types.h"
#include "dpcd_defs.h"
#include "dc/inc/core_types.h"

#include "dm_helpers.h"
#include "ddc_service_types.h"

static u32 edid_extract_panel_id(struct edid *edid)
{
	return (u32)edid->mfg_id[0] << 24   |
	       (u32)edid->mfg_id[1] << 16   |
	       (u32)EDID_PRODUCT_ID(edid);
}

static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
{
	uint32_t panel_id = edid_extract_panel_id(edid);

	switch (panel_id) {
	/* Workaround for some monitors which does not work well with FAMS */
	case drm_edid_encode_panel_id('S', 'A', 'M', 0x0E5E):
	case drm_edid_encode_panel_id('S', 'A', 'M', 0x7053):
	case drm_edid_encode_panel_id('S', 'A', 'M', 0x71AC):
		DRM_DEBUG_DRIVER("Disabling FAMS on monitor with panel id %X\n", panel_id);
		edid_caps->panel_patch.disable_fams = true;
		break;
	/* Workaround for some monitors that do not clear DPCD 0x317 if FreeSync is unsupported */
	case drm_edid_encode_panel_id('A', 'U', 'O', 0xA7AB):
	case drm_edid_encode_panel_id('A', 'U', 'O', 0xE69B):
	case drm_edid_encode_panel_id('B', 'O', 'E', 0x092A):
	case drm_edid_encode_panel_id('L', 'G', 'D', 0x06D1):
		DRM_DEBUG_DRIVER("Clearing DPCD 0x317 on monitor with panel id %X\n", panel_id);
		edid_caps->panel_patch.remove_sink_ext_caps = true;
		break;
	default:
		return;
	}
}

/**
 * dm_helpers_parse_edid_caps() - Parse edid caps
 *
 * @link: current detected link
 * @edid:	[in] pointer to edid
 * @edid_caps:	[in] pointer to edid caps
 *
 * Return: void
 */
enum dc_edid_status dm_helpers_parse_edid_caps(
		struct dc_link *link,
		const struct dc_edid *edid,
		struct dc_edid_caps *edid_caps