path: root/drivers/gpu/drm/i915/intel_bios.h

/*
 * Copyright © 2006 Intel Corporation
 *
 * 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.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *
 */

#ifndef _I830_BIOS_H_
#define _I830_BIOS_H_

#include <drm/drmP.h>

struct vbt_header {
	u8 signature[20];		/**< Always starts with 'VBT$' */
	u16 version;			/**< decimal */
	u16 header_size;		/**< in bytes */
	u16 vbt_size;			/**< in bytes */
	u8 vbt_checksum;
	u8 reserved0;
	u32 bdb_offset;			/**< from beginning of VBT */
	u32 aim_offset[4];		/**< from beginning of VBT */
} __packed;

struct bdb_header {
	u8 signature[16];		/**< Always 'BIOS_DATA_BLOCK' */
	u16 version;			/**< decimal */
	u16 header_size;		/**< in bytes */
	u16 bdb_size;			/**< in bytes */
};

/* strictly speaking, this is a "skip" block, but it has interesting info */
struct vbios_data {
	u8 type; /* 0 == desktop, 1 == mobile */
	u8 relstage;
	u8 chipset;
	u8 lvds_present:1;
	u8 tv_present:1;
	u8 rsvd2:6; /* finish byte */
	u8 rsvd3[4];
	u8 signon[155];
	u8 copyright[61];
	u16 code_segment;
	u8 dos_boot_mode;
	u8 bandwidth_percent;
	u8 rsvd4; /* popup memory size */
	u8 resize_pci_bios;
	u8 rsvd5; /* is crt already on ddc2 */
} __packed;

/*
 * There are several types of BIOS data blocks (BDBs), each block has
 * an ID and size in the first 3 bytes (ID in first, size in next 2).
 * Known types are listed below.
 */
#define BDB_GENERAL_FEATURES	  1
#define BDB_GENERAL_DEFINITIONS	  2
#define BDB_OLD_TOGGLE_LIST	  3
#define BDB_MODE_SUPPORT_LIST	  4
#define BDB_GENERIC_MODE_TABLE	  5
#define BDB_EXT_MMIO_REGS	  6
#define BDB_SWF_IO		  7
#define BDB_SWF_MMIO		  8
#define BDB_DOT_CLOCK_TABLE	  9
#define BDB_MODE_REMOVAL_TABLE	 10
#define BDB_CHILD_DEVICE_TABLE	 11
#define BDB_DRIVER_FEATURES	 12
#define BDB_DRIVER_PERSISTENCE	 13
#define BDB_EXT_TABLE_PTRS	 14
#define BDB_DOT_CLOCK_OVERRIDE	 15
#define BDB_DISPLAY_SELECT	 16
/* 17 rsvd */
#define BDB_DRIVER_ROTATION	 18
#define BDB_DISPLAY_REMOVE	 19
#define BDB_OEM_CUSTOM		 20
#define BDB_EFP_LIST		 21 /* workarounds for VGA hsync/vsync */
#define BDB_SDVO_LVDS_OPTIONS	 22
#define BDB_SDVO_PANEL_DTDS	 23
#define BDB_SDVO_LVDS_PNP_IDS	 24
#define BDB_SDVO_LVDS_POWER_SEQ	 25
#define BDB_TV_OPTIONS		 26
#define BDB_EDP			 27
#define BDB_LVDS_OPTIONS	 40
#define BDB_LVDS_LFP_DATA_PTRS	 41
#define BDB_LVDS_LFP_DATA	 42
#define BDB_LVDS_BACKLIGHT	 43
#define BDB_LVDS_POWER		 44
#define BDB_MIPI_CONFIG		 52
#define BDB_MIPI_SEQUENCE	 53
#define BDB_SKIP		254 /* VBIOS private block, ignore */

struct bdb_general_features {
        /* bits 1 */
	u8 panel_fitting:2;
	u8 flexaim:1;
	u8 msg_enable:1;
	u8 clear_screen:3;
	u8 color_flip:1;

        /* bits 2 */
	u8 download_ext_vbt:1;
	u8 enable_ssc:1;
	u8 ssc_freq:1;
	u8 enable_lfp_on_override:1;
	u8 disable_ssc_ddt:1;
	u8 rsvd7:1;
	u8 display_clock_mode:1;
	u8 rsvd8:1; /* finish byte */

        /* bits 3 */
	u8 disable_smooth_vision:1;
	u8 single_dvi:1;
	u8 rsvd9:1;
	u8 fdi_rx_polarity_inverted:1;
	u8 rsvd10:4; /* finish byte */

        /* bits 4 */
	u8 legacy_monitor_detect;

        /* bits 5 */
	u8 int_crt_support:1;
	u8 int_tv_support:1;
	u8 int_efp_support:1;
	u8 dp_ssc_enb:1;	/* PCH attached eDP supports SSC */
	u8 dp_ssc_freq:1;	/* SSC freq for PCH attached eDP */
	u8 rsvd11:3; /* finish byte */
} __packed;

/* pre-915 */
#define GPIO_PIN_DVI_LVDS	0x03 /* "DVI/LVDS DDC GPIO pins" */
#define GPIO_PIN_ADD_I2C	0x05 /* "ADDCARD I2C GPIO pins" */
#define GPIO_PIN_ADD_DDC	0x04 /* "ADDCARD DDC GPIO pins" */
#define GPIO_PIN_ADD_DDC_I2C	0x06 /* "ADDCARD DDC/I2C GPIO pins" */

/* Pre 915 */
#define DEVICE_TYPE_NONE	0x00
#define DEVICE_TYPE_CRT		0x01
#define DEVICE_TYPE_TV		0x09
#define DEVICE_TYPE_EFP		0x12
#define DEVICE_TYPE_LFP		0x22
/* On 915+ */
#define DEVICE_TYPE_CRT_DPMS		0x6001
#define DEVICE_TYPE_CRT_DPMS_HOTPLUG	0x4001
#define DEVICE_TYPE_TV_COMPOSITE	0x0209
#define DEVICE_TYPE_TV_MACROVISION	0x0289
#define DEVICE_TYPE_TV_RF_COMPOSITE	0x020c
#define DEVICE_TYPE_TV_SVIDEO_COMPOSITE	0x0609
#define DEVICE_TYPE_TV_SCART		0x0209
#define DEVICE_TYPE_TV_CODEC_HOTPLUG_PWR 0x6009
#define DEVICE_TYPE_EFP_HOTPLUG_PWR	0x6012
#define DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR	0x6052
#define DEVICE_TYPE_EFP_DVI_I		0x6053
#define DEVICE_TYPE_EFP_DVI_D_DUAL	0x6152
#define DEVICE_TYPE_EFP_DVI_D_HDCP	0x60d2
#define DEVICE_TYPE_OPENLDI_HOTPLUG_PWR	0x6062
#define DEVICE_TYPE_OPENLDI_DUALPIX	0x6162
#define DEVICE_TYPE_LFP_PANELLINK	0x5012
#define DEVICE_TYPE_LFP_CMOS_PWR	0x5042
#define DEVICE_TYPE_LFP_LVDS_PWR	0x5062
#define DEVICE_TYPE_LFP_LVDS_DUAL	0x5162
#define DEVICE_TYPE_LFP_LVDS_DUAL_HDCP	0x51e2

#define DEVICE_CFG_NONE		0x00
#define DEVICE_CFG_12BIT_DVOB	0x01
#define DEVICE_CFG_12BIT_DVOC	0x02
#define DEVICE_CFG_24BIT_DVOBC	0x09
#define DEVICE_CFG_24BIT_DVOCB	0x0a
#define DEVICE_CFG_DUAL_DVOB	0x11
#define DEVICE_CFG_DUAL_DVOC	0x12
#define DEVICE_CFG_DUAL_DVOBC	0x13
#define DEVICE_CFG_DUAL_LINK_DVOBC	0x19
#define DEVICE_CFG_DUAL_LINK_DVOCB	0x1a

#define DEVICE_WIRE_NONE	0x00
#define DEVICE_WIRE_DVOB	0x01
#define DEVICE_WIRE_DVOC	0x02
#define DEVICE_WIRE_DVOBC	0x03
#define DEVICE_WIRE_DVOBB	0x05
#define DEVICE_WIRE_DVOCC	0x06
#define DEVICE_WIRE_DVOB_MASTER 0x0d
#define DEVICE_WIRE_DVOC_MASTER 0x0e

#define DEVICE_PORT_DVOA	0x00 /* none on 845+ */
#define DEVICE_PORT_DVOB	0x01
#define DEVICE_PORT_DVOC	0x02

/* We used to keep this struct but without any version control. We should avoid
 * using it in the future, but it should be safe to keep using it in the old
 * code. */
struct old_child_dev_config {
	u16 handle;
	u16 device_type;
	u8  device_id[10]; /* ascii string */
	u16 addin_offset;
	u8  dvo_port; /* See Device_PORT_* above */
	u8  i2c_pin;
	u8  slave_addr;
	u8  ddc_pin;
	u16 edid_ptr;
	u8  dvo_cfg; /* See DEVICE_CFG_* above */
	u8  dvo2_port;
	u8  i2c2_pin;
	u8  slave2_addr;
	u8  ddc2_pin;
	u8  capabilities;
	u8  dvo_wiring;/* See DEVICE_WIRE_* above */
	u8  dvo2_wiring;
	u16 extended_type;
	u8  dvo_function;
} __packed;

/* This one contains field offsets that are known to be common for all BDB
 * versions. Notice that the meaning of the contents contents may still change,
 * but at least the offsets are consistent. */
struct common_child_dev_config {
	u16 handle;
	u16 device_type;
	u8 not_common1[12];
	u8 dvo_port;
	u8 not_common2[2];
	u8 ddc_pin;
	u16 edid_ptr;
} __packed;

/* This field changes depending on the BDB version, so the most reliable way to
 * read it is by checking the BDB version and reading the raw pointer. */
union child_device_config {
	/* This one is safe to be used anywhere, but the code should still check
	 * the BDB version. */
	u8 raw[33];
	/* This one should only be kept for legacy code. */
	struct old_child_dev_config old;
	/* This one should also be safe to use anywhere, even without version
	 * checks. */
	struct common_child_dev_config common;
};

struct bdb_general_definitions {
	/* DDC GPIO */
	u8 crt_ddc_gmbus_pin;

	/* DPMS bits */
	u8 dpms_acpi:1;
	u8 skip_boot_crt_detect:1;
	u8 dpms_aim:1;
	u8 rsvd1:5; /* finish byte */

	/* boot device bits */
	u8 boot_display[2];
	u8 child_dev_size;

	/*
	 * Device info:
	 * If TV is present, it'll be at devices[0].
	 * LVDS will be next, either devices[0] or [1], if present.
	 * On some platforms the number