关于DVI视频输出口，微软搞了个SDVO用来保护：
#define SDVO_OUTPUT_FIRST (0)
#define SDVO_OUTPUT_TMDS0 (1 << 0)
#define SDVO_OUTPUT_RGB0 (1 << 1)
#define SDVO_OUTPUT_CVBS0 (1 << 2)
#define SDVO_OUTPUT_SVID0 (1 << 3)
#define SDVO_OUTPUT_YPRPB0 (1 << 4)
#define SDVO_OUTPUT_SCART0 (1 << 5)
#define SDVO_OUTPUT_LVDS0 (1 << 6)
#define SDVO_OUTPUT_TMDS1 (1 << 8)
#define SDVO_OUTPUT_RGB1 (1 << 9)
#define SDVO_OUTPUT_CVBS1 (1 << 10)
#define SDVO_OUTPUT_SVID1 (1 << 11)
#define SDVO_OUTPUT_YPRPB1 (1 << 12)
#define SDVO_OUTPUT_SCART1 (1 << 13)
#define SDVO_OUTPUT_LVDS1 (1 << 14)
#define SDVO_OUTPUT_LAST (14)
struct i830_sdvo_caps {
uint8_t vendor_id;
uint8_t device_id;
uint8_t device_rev_id;
uint8_t sdvo_version_major;
uint8_t sdvo_version_minor;
unsigned int sdvo_input_count:2;
unsigned int smooth_scaling:1;
unsigned int sharp_scaling:1;
unsigned int up_scaling:1;
unsigned int down_scaling:1;
unsigned int stall_support:1;
unsigned int pad:1;
uint16_t output_flags;
} __attribute__((packed));
/** This matches the EDID DTD structure, more or less */
struct i830_sdvo_dtd {
struct {
uint16_t clock; /**< pixel clock, in 10kHz units */
uint8_t h_active; /**< lower 8 bits (pixels) */
uint8_t h_blank; /**< lower 8 bits (pixels) */
uint8_t h_high; /**< upper 4 bits each h_active, h_blank */
uint8_t v_active; /**< lower 8 bits (lines) */
uint8_t v_blank; /**< lower 8 bits (lines) */
uint8_t v_high; /**< upper 4 bits each v_active, v_blank */
} part1;
struct {
uint8_t h_sync_off; /**< lower 8 bits, from hblank start */
uint8_t h_sync_width; /**< lower 8 bits (pixels) */
/** lower 4 bits each vsync offset, vsync width */
uint8_t v_sync_off_width;
/**
* 2 high bits of hsync offset, 2 high bits of hsync width,
* bits 4-5 of vsync offset, and 2 high bits of vsync width.
*/
uint8_t sync_off_width_high;
uint8_t dtd_flags;
uint8_t sdvo_flags;
/** bits 6-7 of vsync offset at bits 6-7 */
uint8_t v_sync_off_high;
uint8_t reserved;
} part2;
} __attribute__((packed));
struct i830_sdvo_pixel_clock_range {
uint16_t min; /**< pixel clock, in 10kHz units */
uint16_t max; /**< pixel clock, in 10kHz units */
} __attribute__((packed));
struct i830_sdvo_preferred_input_timing_args {
uint16_t clock;
uint16_t width;
uint16_t height;
} __attribute__((packed));
/* I2C registers for SDVO */
#define SDVO_I2C_ARG_0 0x07
#define SDVO_I2C_ARG_1 0x06
#define SDVO_I2C_ARG_2 0x05
#define SDVO_I2C_ARG_3 0x04
#define SDVO_I2C_ARG_4 0x03
#define SDVO_I2C_ARG_5 0x02
#define SDVO_I2C_ARG_6 0x01
#define SDVO_I2C_ARG_7 0x00
#define SDVO_I2C_OPCODE 0x08
#define SDVO_I2C_CMD_STATUS 0x09
#define SDVO_I2C_RETURN_0 0x0a
#define SDVO_I2C_RETURN_1 0x0b
#define SDVO_I2C_RETURN_2 0x0c
#define SDVO_I2C_RETURN_3 0x0d
#define SDVO_I2C_RETURN_4 0x0e
#define SDVO_I2C_RETURN_5 0x0f
#define SDVO_I2C_RETURN_6 0x10
#define SDVO_I2C_RETURN_7 0x11
#define SDVO_I2C_VENDOR_BEGIN 0x20
/* Status results */
#define SDVO_CMD_STATUS_POWER_ON 0x0
#define SDVO_CMD_STATUS_SUCCESS 0x1
#define SDVO_CMD_STATUS_NOTSUPP 0x2
#define SDVO_CMD_STATUS_INVALID_ARG 0x3
#define SDVO_CMD_STATUS_PENDING 0x4
#define SDVO_CMD_STATUS_TARGET_NOT_SPECIFIED 0x5
#define SDVO_CMD_STATUS_SCALING_NOT_SUPP 0x6
/* SDVO commands, argument/result registers */
#define SDVO_CMD_RESET 0x01
/** Returns a struct i830_sdvo_caps */
#define SDVO_CMD_GET_DEVICE_CAPS 0x02
#define SDVO_CMD_GET_FIRMWARE_REV 0x86
# define SDVO_DEVICE_FIRMWARE_MINOR SDVO_I2C_RETURN_0
# define SDVO_DEVICE_FIRMWARE_MAJOR SDVO_I2C_RETURN_1
# define SDVO_DEVICE_FIRMWARE_PATCH SDVO_I2C_RETURN_2
/**
* Reports which inputs are trained (managed to sync).
*
* Devices must have trained within 2 vsyncs of a mode change.
*/
#define SDVO_CMD_GET_TRAINED_INPUTS 0x03
struct i830_sdvo_get_trained_inputs_response {
unsigned int input0_trained:1;
unsigned int input1_trained:1;
unsigned int pad:6;
} __attribute__((packed));
/** Returns a struct i830_sdvo_output_flags of active outputs. */
#define SDVO_CMD_GET_ACTIVE_OUTPUTS 0x04
/**
* Sets the current set of active outputs.
*
* Takes a struct i830_sdvo_output_flags. Must be preceded by a SET_IN_OUT_MAP
* on multi-output devices.
*/
#define SDVO_CMD_SET_ACTIVE_OUTPUTS 0x05
/**
* Returns the current mapping of SDVO inputs to outputs on the device.
*
* Returns two struct i830_sdvo_output_flags structures.
*/
#define SDVO_CMD_GET_IN_OUT_MAP 0x06
struct i830_sdvo_in_out_map {
uint16_t in0, in1;
};
/**
* Sets the current mapping of SDVO inputs to outputs on the device.
*
* Takes two struct i380_sdvo_output_flags structures.
*/
#define SDVO_CMD_SET_IN_OUT_MAP 0x07
/**
* Returns a struct i830_sdvo_output_flags of attached displays.
*/
#define SDVO_CMD_GET_ATTACHED_DISPLAYS 0x0b
/**
* Returns a struct i830_sdvo_ouptut_flags of displays supporting hot plugging.
*/
#define SDVO_CMD_GET_HOT_PLUG_SUPPORT 0x0c
/**
* Takes a struct i830_sdvo_output_flags.
*/
#define SDVO_CMD_SET_ACTIVE_HOT_PLUG 0x0d
/**
* Returns a struct i830_sdvo_output_flags of displays with hot plug
* interrupts enabled.
*/
#define SDVO_CMD_GET_ACTIVE_HOT_PLUG 0x0e
#define SDVO_CMD_GET_INTERRUPT_EVENT_SOURCE 0x0f
struct i830_sdvo_get_interrupt_event_source_response {
uint16_t interrupt_status;
unsigned int ambient_light_interrupt:1;
unsigned int pad:7;
} __attribute__((packed));
/**
* Selects which input is affected by future input commands.
*
* Commands affected include SET_INPUT_TIMINGS_PART[12],
* GET_INPUT_TIMINGS_PART[12], GET_PREFERRED_INPUT_TIMINGS_PART[12],
* GET_INPUT_PIXEL_CLOCK_RANGE, and CREATE_PREFERRED_INPUT_TIMINGS.
*/
#define SDVO_CMD_SET_TARGET_INPUT 0x10
struct i830_sdvo_set_target_input_args {
unsigned int target_1:1;
unsigned int pad:7;
} __attribute__((packed));
/**
* Takes a struct i830_sdvo_output_flags of which outputs are targetted by
* future output commands.
*
* Affected commands inclue SET_OUTPUT_TIMINGS_PART[12],
* GET_OUTPUT_TIMINGS_PART[12], and GET_OUTPUT_PIXEL_CLOCK_RANGE.
*/
#define SDVO_CMD_SET_TARGET_OUTPUT 0x11
#define SDVO_CMD_GET_INPUT_TIMINGS_PART1 0x12
#define SDVO_CMD_GET_INPUT_TIMINGS_PART2 0x13
#define SDVO_CMD_SET_INPUT_TIMINGS_PART1 0x14
#define SDVO_CMD_SET_INPUT_TIMINGS_PART2 0x15
#define SDVO_CMD_SET_OUTPUT_TIMINGS_PART1 0x16
#define SDVO_CMD_SET_OUTPUT_TIMINGS_PART2 0x17
#define SDVO_CMD_GET_OUTPUT_TIMINGS_PART1 0x18
#define SDVO_CMD_GET_OUTPUT_TIMINGS_PART2 0x19
/* Part 1 */
# define SDVO_DTD_CLOCK_LOW SDVO_I2C_ARG_0
# define SDVO_DTD_CLOCK_HIGH SDVO_I2C_ARG_1
# define SDVO_DTD_H_ACTIVE SDVO_I2C_ARG_2
# define SDVO_DTD_H_BLANK SDVO_I2C_ARG_3
# define SDVO_DTD_H_HIGH SDVO_I2C_ARG_4
# define SDVO_DTD_V_ACTIVE SDVO_I2C_ARG_5
# define SDVO_DTD_V_BLANK SDVO_I2C_ARG_6
# define SDVO_DTD_V_HIGH SDVO_I2C_ARG_7
/* Part 2 */
# define SDVO_DTD_HSYNC_OFF SDVO_I2C_ARG_0
# define SDVO_DTD_HSYNC_WIDTH SDVO_I2C_ARG_1
# define SDVO_DTD_VSYNC_OFF_WIDTH SDVO_I2C_ARG_2
# define SDVO_DTD_SYNC_OFF_WIDTH_HIGH SDVO_I2C_ARG_3
# define SDVO_DTD_DTD_FLAGS SDVO_I2C_ARG_4
# define SDVO_DTD_DTD_FLAG_INTERLACED (1 << 7)
# define SDVO_DTD_DTD_FLAG_STEREO_MASK (3 << 5)
# define SDVO_DTD_DTD_FLAG_INPUT_MASK (3 << 3)
# define SDVO_DTD_DTD_FLAG_SYNC_MASK (3 << 1)
# define SDVO_DTD_SDVO_FLAS SDVO_I2C_ARG_5
# define SDVO_DTD_SDVO_FLAG_STALL (1 << 7)
# define SDVO_DTD_SDVO_FLAG_CENTERED (0 << 6)
# define SDVO_DTD_SDVO_FLAG_UPPER_LEFT (1 << 6)
# define SDVO_DTD_SDVO_FLAG_SCALING_MASK (3 << 4)
# define SDVO_DTD_SDVO_FLAG_SCALING_NONE (0 << 4)
# define SDVO_DTD_SDVO_FLAG_SCALING_SHARP (1 << 4)
# define SDVO_DTD_SDVO_FLAG_SCALING_SMOOTH (2 << 4)
# define SDVO_DTD_VSYNC_OFF_HIGH SDVO_I2C_ARG_6
/**
* Generates a DTD based on the given width, height, and flags.
*
* This will be supported by any device supporting scaling or interlaced
* modes.
*/
#define SDVO_CMD_CREATE_PREFERRED_INPUT_TIMING 0x1a
# define SDVO_PREFERRED_INPUT_TIMING_CLOCK_LOW SDVO_I2C_ARG_0
# define SDVO_PREFERRED_INPUT_TIMING_CLOCK_HIGH SDVO_I2C_ARG_1
# define SDVO_PREFERRED_INPUT_TIMING_WIDTH_LOW SDVO_I2C_ARG_2
# define SDVO_PREFERRED_INPUT_TIMING_WIDTH_HIGH SDVO_I2C_ARG_3
# define SDVO_PREFERRED_INPUT_TIMING_HEIGHT_LOW SDVO_I2C_ARG_4
# define SDVO_PREFERRED_INPUT_TIMING_HEIGHT_HIGH SDVO_I2C_ARG_5
# define SDVO_PREFERRED_INPUT_TIMING_FLAGS SDVO_I2C_ARG_6
# define SDVO_PREFERRED_INPUT_TIMING_FLAGS_INTERLACED (1 << 0)
# define SDVO_PREFERRED_INPUT_TIMING_FLAGS_SCALED (1 << 1)
#define SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART1 0x1b
#define SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART2 0x1c
/** Returns a struct i830_sdvo_pixel_clock_range */
#define SDVO_CMD_GET_INPUT_PIXEL_CLOCK_RANGE 0x1d
/** Returns a struct i830_sdvo_pixel_clock_range */
#define SDVO_CMD_GET_OUTPUT_PIXEL_CLOCK_RANGE 0x1e
/** Returns a byte bitfield containing SDVO_CLOCK_RATE_MULT_* flags */
#define SDVO_CMD_GET_SUPPORTED_CLOCK_RATE_MULTS 0x1f
/** Returns a byte containing a SDVO_CLOCK_RATE_MULT_* flag */
#define SDVO_CMD_GET_CLOCK_RATE_MULT 0x20
/** Takes a byte containing a SDVO_CLOCK_RATE_MULT_* flag */
#define SDVO_CMD_SET_CLOCK_RATE_MULT 0x21
# define SDVO_CLOCK_RATE_MULT_1X (1 << 0)
# define SDVO_CLOCK_RATE_MULT_2X (1 << 1)
# define SDVO_CLOCK_RATE_MULT_4X (1 << 3)
#define SDVO_CMD_GET_SUPPORTED_TV_FORMATS 0x27
/** 5 bytes of bit flags for TV formats shared by all TV format functions */
struct i830_sdvo_tv_format {
unsigned int ntsc_m:1;
unsigned int ntsc_j:1;
unsigned int ntsc_443:1;
unsigned int pal_b:1;
unsigned int pal_d:1;
unsigned int pal_g:1;
unsigned int pal_h:1;
unsigned int pal_i:1;
unsigned int pal_m:1;
unsigned int pal_n:1;
unsigned int pal_nc:1;
unsigned int pal_60:1;
unsigned int secam_b:1;
unsigned int secam_d:1;
unsigned int secam_g:1;
unsigned int secam_k:1;
unsigned int secam_k1:1;
unsigned int secam_l:1;
unsigned int secam_60:1;
unsigned int hdtv_std_smpte_240m_1080i_59:1;
unsigned int hdtv_std_smpte_240m_1080i_60:1;
unsigned int hdtv_std_smpte_260m_1080i_59:1;
unsigned int hdtv_std_smpte_260m_1080i_60:1;
unsigned int hdtv_std_smpte_270m_1080i_50:1;
unsigned int hdtv_std_smpte_274m_1080i_50:1;
unsigned int hdtv_std_smpte_274m_1080i_59:1;
unsigned int hdtv_std_smpte_274m_1080i_60:1;
unsigned int hdtv_std_smpte_274m_1080p_23:1;
unsigned int hdtv_std_smpte_274m_1080p_24:1;
unsigned int hdtv_std_smpte_274m_1080p_25:1;
unsigned int hdtv_std_smpte_274m_1080p_29:1;
unsigned int hdtv_std_smpte_274m_1080p_50:1;
unsigned int hdtv_std_smpte_274m_1080p_59:1;
unsigned int hdtv_std_smpte_274m_1080p_60:1;
unsigned int hdtv_std_smpte_295m_1080i_50:1;
unsigned int hdtv_std_smpte_295m_1080p_50:1;
unsigned int hdtv_std_smpte_296m_720p_59:1;
unsigned int hdtv_std_smpte_296m_720p_60:1;
unsigned int hdtv_std_smpte_296m_720p_50:1;
unsigned int hdtv_std_smpte_293m_480p_59:1;
unsigned int hdtv_std_smpte_270m_480i_59:1;
unsigned int hdtv_std_iturbt601_576i_50:1;
unsigned int hdtv_std_iturbt601_576p_50:1;
unsigned int hdtv_std_eia_7702a_480i_60:1;
unsigned int hdtv_std_eia_7702a_480p_60:1;
unsigned int pad:3;
} __attribute__((packed));
#define SDVO_CMD_GET_TV_FORMAT 0x28
/** This command should be run before SetOutputTimingsPart[12] */
#define SDVO_CMD_SET_TV_FORMAT 0x29
/** Returns the resolutiosn that can be used with the given TV format */
#define SDVO_CMD_GET_SDTV_RESOLUTION_SUPPORT 0x83
struct i830_sdvo_sdtv_resolution_request {
unsigned int ntsc_m:1;
unsigned int ntsc_j:1;
unsigned int ntsc_443:1;
unsigned int pal_b:1;
unsigned int pal_d:1;
unsigned int pal_g:1;
unsigned int pal_h:1;
unsigned int pal_i:1;
unsigned int pal_m:1;
unsigned int pal_n:1;
unsigned int pal_nc:1;
unsigned int pal_60:1;
} __attribute__((packed));
struct i830_sdvo_sdtv_resolution_reply {
unsigned int res_320x200:1;
unsigned int res_320x240:1;
unsigned int res_400x300:1;
unsigned int res_640x350:1;
unsigned int res_640x400:1;
unsigned int res_640x480:1;
unsigned int res_704x480:1;
unsigned int res_704x576:1;
unsigned int res_720x350:1;
unsigned int res_720x400:1;
unsigned int res_720x480:1;
unsigned int res_720x540:1;
unsigned int res_720x576:1;
unsigned int res_800x600:1;
unsigned int res_832x624:1;
unsigned int res_920x766:1;
unsigned int res_1024x768:1;
unsigned int res_1280x1024:1;
unsigned int pad:5;
} __attribute__((packed));
#define SDVO_CMD_GET_SUPPORTED_POWER_STATES 0x2a
#define SDVO_CMD_GET_ENCODER_POWER_STATE 0x2b
#define SDVO_CMD_SET_ENCODER_POWER_STATE 0x2c
# define SDVO_ENCODER_STATE_ON (1 << 0)
# define SDVO_ENCODER_STATE_STANDBY (1 << 1)
# define SDVO_ENCODER_STATE_SUSPEND (1 << 2)
# define SDVO_ENCODER_STATE_OFF (1 << 3)
#define SDVO_CMD_GET_SUPPORTED_ENHANCEMENTS 0x84
struct i830_sdvo_enhancements_reply {
unsigned int flicker_filter:1;
unsigned int flicker_filter_adaptive:1;
unsigned int flicker_filter_2d:1;
unsigned int saturation:1;
unsigned int hue:1;
unsigned int brightness:1;
unsigned int contrast:1;
unsigned int overscan_h:1;
unsigned int overscan_v:1;
unsigned int position_h:1;
unsigned int position_v:1;
unsigned int sharpness:1;
unsigned int dot_crawl:1;
unsigned int dither:1;
unsigned int max_tv_chroma_filter:1;
unsigned int max_tv_luma_filter:1;
} __attribute__((packed));
/* Picture enhancement limits below are dependent on the current TV format,
* and thus need to be queried and set after it.
*/
#define SDVO_CMD_GET_MAX_FLICKER_FITER 0x4d
#define SDVO_CMD_GET_MAX_ADAPTIVE_FLICKER_FITER 0x7b
#define SDVO_CMD_GET_MAX_2D_FLICKER_FITER 0x52
#define SDVO_CMD_GET_MAX_SATURATION 0x55
#define SDVO_CMD_GET_MAX_HUE 0x58
#define SDVO_CMD_GET_MAX_BRIGHTNESS 0x5c
#define SDVO_CMD_GET_MAX_CONTRAST 0x5e
#define SDVO_CMD_GET_MAX_OVERSCAN_H 0x61
#define SDVO_CMD_GET_MAX_OVERSCAN_V 0x64
#define SDVO_CMD_GET_MAX_POSITION_H 0x67
#define SDVO_CMD_GET_MAX_POSITION_V 0x6a
#define SDVO_CMD_GET_MAX_SHARPNESS_V 0x6d
#define SDVO_CMD_GET_MAX_TV_CHROMA 0x74
#define SDVO_CMD_GET_MAX_TV_LUMA 0x77
struct i830_sdvo_enhancement_limits_reply {
uint16_t max_value;
uint16_t default_value;
} __attribute__((packed));
#define SDVO_CMD_GET_FLICKER_FITER 0x4d
#define SDVO_CMD_SET_FLICKER_FITER 0x4e
#define SDVO_CMD_GET_ADAPTIVE_FLICKER_FITER 0x50
#define SDVO_CMD_SET_ADAPTIVE_FLICKER_FITER 0x51
#define SDVO_CMD_GET_2D_FLICKER_FITER 0x53
#define SDVO_CMD_SET_2D_FLICKER_FITER 0x54
#define SDVO_CMD_GET_SATURATION 0x56
#define SDVO_CMD_SET_SATURATION 0x57
#define SDVO_CMD_GET_HUE 0x59
#define SDVO_CMD_SET_HUE 0x5a
#define SDVO_CMD_GET_BRIGHTNESS 0x5c
#define SDVO_CMD_SET_BRIGHTNESS 0x5d
#define SDVO_CMD_GET_CONTRAST 0x5f
#define SDVO_CMD_SET_CONTRAST 0x60
#define SDVO_CMD_GET_OVERSCAN_H 0x62
#define SDVO_CMD_SET_OVERSCAN_H 0x63
#define SDVO_CMD_GET_OVERSCAN_V 0x65
#define SDVO_CMD_SET_OVERSCAN_V 0x66
#define SDVO_CMD_GET_POSITION_H 0x68
#define SDVO_CMD_SET_POSITION_H 0x69
#define SDVO_CMD_GET_POSITION_V 0x6b
#define SDVO_CMD_SET_POSITION_V 0x6c
#define SDVO_CMD_GET_SHARPNESS 0x6e
#define SDVO_CMD_SET_SHARPNESS 0x6f
#define SDVO_CMD_GET_TV_CHROMA 0x75
#define SDVO_CMD_SET_TV_CHROMA 0x76
#define SDVO_CMD_GET_TV_LUMA 0x78
#define SDVO_CMD_SET_TV_LUMA 0x79
struct i830_sdvo_enhancements_arg {
uint16_t value;
}__attribute__((packed));
#define SDVO_CMD_GET_DOT_CRAWL 0x70
#define SDVO_CMD_SET_DOT_CRAWL 0x71
# define SDVO_DOT_CRAWL_ON (1 << 0)
# define SDVO_DOT_CRAWL_DEFAULT_ON (1 << 1)
#define SDVO_CMD_GET_DITHER 0x72
#define SDVO_CMD_SET_DITHER 0x73
# define SDVO_DITHER_ON (1 << 0)
# define SDVO_DITHER_DEFAULT_ON (1 << 1)
#define SDVO_CMD_SET_TV_RESOLUTION_SUPPORT 0x93
#define SDVO_CMD_SET_CONTROL_BUS_SWITCH 0x7a
# define SDVO_CONTROL_BUS_PROM (1 << 0)
# define SDVO_CONTROL_BUS_DDC1 (1 << 1)
# define SDVO_CONTROL_BUS_DDC2 (1 << 2)
# define SDVO_CONTROL_BUS_DDC3 (1 << 3)
/* HDMI op codes */
#define SDVO_CMD_GET_SUPP_ENCODE 0x9d
#define SDVO_CMD_GET_ENCODE 0x9e
#define SDVO_CMD_SET_ENCODE 0x9f
#define SDVO_ENCODE_DVI 0x0
#define SDVO_ENCODE_HDMI 0x1
#define SDVO_CMD_SET_PIXEL_REPLI 0x8b
#define SDVO_CMD_GET_PIXEL_REPLI 0x8c
#define SDVO_CMD_GET_COLORIMETRY_CAP 0x8d
#define SDVO_CMD_SET_COLORIMETRY 0x8e
#define SDVO_COLORIMETRY_RGB256 0x0
#define SDVO_COLORIMETRY_RGB220 0x1
#define SDVO_COLORIMETRY_YCrCb422 0x3
#define SDVO_COLORIMETRY_YCrCb444 0x4
#define SDVO_CMD_GET_COLORIMETRY 0x8f
#define SDVO_CMD_GET_AUDIO_ENCRYPT_PREFER 0x90
#define SDVO_CMD_SET_AUDIO_STAT 0x91
#define SDVO_CMD_GET_AUDIO_STAT 0x92
#define SDVO_CMD_SET_HBUF_INDEX 0x93
#define SDVO_CMD_GET_HBUF_INDEX 0x94
#define SDVO_CMD_GET_HBUF_INFO 0x95
#define SDVO_CMD_SET_HBUF_AV_SPLIT 0x96
#define SDVO_CMD_GET_HBUF_AV_SPLIT 0x97
#define SDVO_CMD_SET_HBUF_DATA 0x98
#define SDVO_CMD_GET_HBUF_DATA 0x99
#define SDVO_CMD_SET_HBUF_TXRATE 0x9a
#define SDVO_CMD_GET_HBUF_TXRATE 0x9b
#define SDVO_HBUF_TX_DISABLED (0 << 6)
#define SDVO_HBUF_TX_ONCE (2 << 6)
#define SDVO_HBUF_TX_VSYNC (3 << 6)
#define SDVO_CMD_GET_AUDIO_TX_INFO 0x9c
struct i830_sdvo_encode{
uint8_t dvi_rev;
uint8_t hdmi_rev;
} __attribute__ ((packed));