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linux/include/drm/drm_edid.h
Javier Martinez Canillas 5343f29b3d
drm: Move drm_set_preferred_mode() helper from drm_edid to drm_modes 
The helper is generic, it doesn't use the opaque EDID type struct drm_edid
and is also used by drivers that only support non-probeable displays such
as fixed panels.

These drivers add a list of modes using drm_mode_probed_add() and then set
a preferred mode using the drm_set_preferred_mode() helper.

It seems more logical to have the helper definition in drm_modes.o instead
of drm_edid.o, since the former contains modes helper while the latter has
helpers to manage the EDID information.

Since both drm_edid.o and drm_modes.o object files are built-in the drm.o
object, there are no functional changes. But besides being a more logical
place for this helper, it could also allow to eventually make drm_edid.o
optional and not included in drm.o if only fixed panels must be supported
in a given system.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240102122208.3103597-1-javierm@redhat.com
2024-01-05 21:14:46 +01:00

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/*
* Copyright © 2007-2008 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 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.
*/
#ifndef __DRM_EDID_H__
#define __DRM_EDID_H__
#include <linux/types.h>
enum hdmi_quantization_range;
struct drm_connector;
struct drm_device;
struct drm_display_mode;
struct drm_edid;
struct hdmi_avi_infoframe;
struct hdmi_vendor_infoframe;
struct i2c_adapter;
#define EDID_LENGTH 128
#define DDC_ADDR 0x50
#define DDC_ADDR2 0x52 /* E-DDC 1.2 - where DisplayID can hide */
#define CEA_EXT 0x02
#define VTB_EXT 0x10
#define DI_EXT 0x40
#define LS_EXT 0x50
#define MI_EXT 0x60
#define DISPLAYID_EXT 0x70
struct est_timings {
u8 t1;
u8 t2;
u8 mfg_rsvd;
} __packed;
/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
#define EDID_TIMING_ASPECT_SHIFT 6
#define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT)
/* need to add 60 */
#define EDID_TIMING_VFREQ_SHIFT 0
#define EDID_TIMING_VFREQ_MASK (0x3f << EDID_TIMING_VFREQ_SHIFT)
struct std_timing {
u8 hsize; /* need to multiply by 8 then add 248 */
u8 vfreq_aspect;
} __packed;
#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
#define DRM_EDID_PT_SEPARATE_SYNC (3 << 3)
#define DRM_EDID_PT_STEREO (1 << 5)
#define DRM_EDID_PT_INTERLACED (1 << 7)
/* If detailed data is pixel timing */
struct detailed_pixel_timing {
u8 hactive_lo;
u8 hblank_lo;
u8 hactive_hblank_hi;
u8 vactive_lo;
u8 vblank_lo;
u8 vactive_vblank_hi;
u8 hsync_offset_lo;
u8 hsync_pulse_width_lo;
u8 vsync_offset_pulse_width_lo;
u8 hsync_vsync_offset_pulse_width_hi;
u8 width_mm_lo;
u8 height_mm_lo;
u8 width_height_mm_hi;
u8 hborder;
u8 vborder;
u8 misc;
} __packed;
/* If it's not pixel timing, it'll be one of the below */
struct detailed_data_string {
u8 str[13];
} __packed;
#define DRM_EDID_RANGE_OFFSET_MIN_VFREQ (1 << 0) /* 1.4 */
#define DRM_EDID_RANGE_OFFSET_MAX_VFREQ (1 << 1) /* 1.4 */
#define DRM_EDID_RANGE_OFFSET_MIN_HFREQ (1 << 2) /* 1.4 */
#define DRM_EDID_RANGE_OFFSET_MAX_HFREQ (1 << 3) /* 1.4 */
#define DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG 0x00 /* 1.3 */
#define DRM_EDID_RANGE_LIMITS_ONLY_FLAG 0x01 /* 1.4 */
#define DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG 0x02 /* 1.3 */
#define DRM_EDID_CVT_SUPPORT_FLAG 0x04 /* 1.4 */
#define DRM_EDID_CVT_FLAGS_STANDARD_BLANKING (1 << 3)
#define DRM_EDID_CVT_FLAGS_REDUCED_BLANKING (1 << 4)
struct detailed_data_monitor_range {
u8 min_vfreq;
u8 max_vfreq;
u8 min_hfreq_khz;
u8 max_hfreq_khz;
u8 pixel_clock_mhz; /* need to multiply by 10 */
u8 flags;
union {
struct {
u8 reserved;
u8 hfreq_start_khz; /* need to multiply by 2 */
u8 c; /* need to divide by 2 */
__le16 m;
u8 k;
u8 j; /* need to divide by 2 */
} __packed gtf2;
struct {
u8 version;
u8 data1; /* high 6 bits: extra clock resolution */
u8 data2; /* plus low 2 of above: max hactive */
u8 supported_aspects;
u8 flags; /* preferred aspect and blanking support */
u8 supported_scalings;
u8 preferred_refresh;
} __packed cvt;
} __packed formula;
} __packed;
struct detailed_data_wpindex {
u8 white_yx_lo; /* Lower 2 bits each */
u8 white_x_hi;
u8 white_y_hi;
u8 gamma; /* need to divide by 100 then add 1 */
} __packed;
struct detailed_data_color_point {
u8 windex1;
u8 wpindex1[3];
u8 windex2;
u8 wpindex2[3];
} __packed;
struct cvt_timing {
u8 code[3];
} __packed;
struct detailed_non_pixel {
u8 pad1;
u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
fb=color point data, fa=standard timing data,
f9=undefined, f8=mfg. reserved */
u8 pad2;
union {
struct detailed_data_string str;
struct detailed_data_monitor_range range;
struct detailed_data_wpindex color;
struct std_timing timings[6];
struct cvt_timing cvt[4];
} __packed data;
} __packed;
#define EDID_DETAIL_EST_TIMINGS 0xf7
#define EDID_DETAIL_CVT_3BYTE 0xf8
#define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
#define EDID_DETAIL_STD_MODES 0xfa
#define EDID_DETAIL_MONITOR_CPDATA 0xfb
#define EDID_DETAIL_MONITOR_NAME 0xfc
#define EDID_DETAIL_MONITOR_RANGE 0xfd
#define EDID_DETAIL_MONITOR_STRING 0xfe
#define EDID_DETAIL_MONITOR_SERIAL 0xff
struct detailed_timing {
__le16 pixel_clock; /* need to multiply by 10 KHz */
union {
struct detailed_pixel_timing pixel_data;
struct detailed_non_pixel other_data;
} __packed data;
} __packed;
#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
#define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1)
#define DRM_EDID_INPUT_COMPOSITE_SYNC (1 << 2)
#define DRM_EDID_INPUT_SEPARATE_SYNCS (1 << 3)
#define DRM_EDID_INPUT_BLANK_TO_BLACK (1 << 4)
#define DRM_EDID_INPUT_VIDEO_LEVEL (3 << 5)
#define DRM_EDID_INPUT_DIGITAL (1 << 7)
#define DRM_EDID_DIGITAL_DEPTH_MASK (7 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_DEPTH_UNDEF (0 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_DEPTH_6 (1 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_DEPTH_8 (2 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_DEPTH_10 (3 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_DEPTH_12 (4 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_DEPTH_14 (5 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_DEPTH_16 (6 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_DEPTH_RSVD (7 << 4) /* 1.4 */
#define DRM_EDID_DIGITAL_TYPE_MASK (7 << 0) /* 1.4 */
#define DRM_EDID_DIGITAL_TYPE_UNDEF (0 << 0) /* 1.4 */
#define DRM_EDID_DIGITAL_TYPE_DVI (1 << 0) /* 1.4 */
#define DRM_EDID_DIGITAL_TYPE_HDMI_A (2 << 0) /* 1.4 */
#define DRM_EDID_DIGITAL_TYPE_HDMI_B (3 << 0) /* 1.4 */
#define DRM_EDID_DIGITAL_TYPE_MDDI (4 << 0) /* 1.4 */
#define DRM_EDID_DIGITAL_TYPE_DP (5 << 0) /* 1.4 */
#define DRM_EDID_DIGITAL_DFP_1_X (1 << 0) /* 1.3 */
#define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0) /* 1.2 */
#define DRM_EDID_FEATURE_CONTINUOUS_FREQ (1 << 0) /* 1.4 */
#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
#define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2)
/* If analog */
#define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
/* If digital */
#define DRM_EDID_FEATURE_COLOR_MASK (3 << 3)
#define DRM_EDID_FEATURE_RGB (0 << 3)
#define DRM_EDID_FEATURE_RGB_YCRCB444 (1 << 3)
#define DRM_EDID_FEATURE_RGB_YCRCB422 (2 << 3)
#define DRM_EDID_FEATURE_RGB_YCRCB (3 << 3) /* both 4:4:4 and 4:2:2 */
#define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5)
#define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6)
#define DRM_EDID_FEATURE_PM_STANDBY (1 << 7)
#define DRM_EDID_HDMI_DC_48 (1 << 6)
#define DRM_EDID_HDMI_DC_36 (1 << 5)
#define DRM_EDID_HDMI_DC_30 (1 << 4)
#define DRM_EDID_HDMI_DC_Y444 (1 << 3)
/* YCBCR 420 deep color modes */
#define DRM_EDID_YCBCR420_DC_48 (1 << 2)
#define DRM_EDID_YCBCR420_DC_36 (1 << 1)
#define DRM_EDID_YCBCR420_DC_30 (1 << 0)
#define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
DRM_EDID_YCBCR420_DC_36 | \
DRM_EDID_YCBCR420_DC_30)
/* HDMI 2.1 additional fields */
#define DRM_EDID_MAX_FRL_RATE_MASK 0xf0
#define DRM_EDID_FAPA_START_LOCATION (1 << 0)
#define DRM_EDID_ALLM (1 << 1)
#define DRM_EDID_FVA (1 << 2)
/* Deep Color specific */
#define DRM_EDID_DC_30BIT_420 (1 << 0)
#define DRM_EDID_DC_36BIT_420 (1 << 1)
#define DRM_EDID_DC_48BIT_420 (1 << 2)
/* VRR specific */
#define DRM_EDID_CNMVRR (1 << 3)
#define DRM_EDID_CINEMA_VRR (1 << 4)
#define DRM_EDID_MDELTA (1 << 5)
#define DRM_EDID_VRR_MAX_UPPER_MASK 0xc0
#define DRM_EDID_VRR_MAX_LOWER_MASK 0xff
#define DRM_EDID_VRR_MIN_MASK 0x3f
/* DSC specific */
#define DRM_EDID_DSC_10BPC (1 << 0)
#define DRM_EDID_DSC_12BPC (1 << 1)
#define DRM_EDID_DSC_16BPC (1 << 2)
#define DRM_EDID_DSC_ALL_BPP (1 << 3)
#define DRM_EDID_DSC_NATIVE_420 (1 << 6)
#define DRM_EDID_DSC_1P2 (1 << 7)
#define DRM_EDID_DSC_MAX_FRL_RATE_MASK 0xf0
#define DRM_EDID_DSC_MAX_SLICES 0xf
#define DRM_EDID_DSC_TOTAL_CHUNK_KBYTES 0x3f
struct edid {
u8 header[8];
/* Vendor & product info */
u8 mfg_id[2];
u8 prod_code[2];
u32 serial; /* FIXME: byte order */
u8 mfg_week;
u8 mfg_year;
/* EDID version */
u8 version;
u8 revision;
/* Display info: */
u8 input;
u8 width_cm;
u8 height_cm;
u8 gamma;
u8 features;
/* Color characteristics */
u8 red_green_lo;
u8 blue_white_lo;
u8 red_x;
u8 red_y;
u8 green_x;
u8 green_y;
u8 blue_x;
u8 blue_y;
u8 white_x;
u8 white_y;
/* Est. timings and mfg rsvd timings*/
struct est_timings established_timings;
/* Standard timings 1-8*/
struct std_timing standard_timings[8];
/* Detailing timings 1-4 */
struct detailed_timing detailed_timings[4];
/* Number of 128 byte ext. blocks */
u8 extensions;
/* Checksum */
u8 checksum;
} __packed;
#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
/* Short Audio Descriptor */
struct cea_sad {
u8 format;
u8 channels; /* max number of channels - 1 */
u8 freq;
u8 byte2; /* meaning depends on format */
};
int drm_edid_to_sad(const struct edid *edid, struct cea_sad **sads);
int drm_edid_to_speaker_allocation(const struct edid *edid, u8 **sadb);
int drm_av_sync_delay(struct drm_connector *connector,
const struct drm_display_mode *mode);
bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2);
int
drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
const struct drm_connector *connector,
const struct drm_display_mode *mode);
int
drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
const struct drm_connector *connector,
const struct drm_display_mode *mode);
void
drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
const struct drm_connector *connector,
const struct drm_display_mode *mode,
enum hdmi_quantization_range rgb_quant_range);
/**
* drm_edid_decode_mfg_id - Decode the manufacturer ID
* @mfg_id: The manufacturer ID
* @vend: A 4-byte buffer to store the 3-letter vendor string plus a '\0'
* termination
*/
static inline const char *drm_edid_decode_mfg_id(u16 mfg_id, char vend[4])
{
vend[0] = '@' + ((mfg_id >> 10) & 0x1f);
vend[1] = '@' + ((mfg_id >> 5) & 0x1f);
vend[2] = '@' + ((mfg_id >> 0) & 0x1f);
vend[3] = '\0';
return vend;
}
/**
* drm_edid_encode_panel_id - Encode an ID for matching against drm_edid_get_panel_id()
* @vend_chr_0: First character of the vendor string.
* @vend_chr_1: Second character of the vendor string.
* @vend_chr_2: Third character of the vendor string.
* @product_id: The 16-bit product ID.
*
* This is a macro so that it can be calculated at compile time and used
* as an initializer.
*
* For instance:
* drm_edid_encode_panel_id('B', 'O', 'E', 0x2d08) => 0x09e52d08
*
* Return: a 32-bit ID per panel.
*/
#define drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, product_id) \
((((u32)(vend_chr_0) - '@') & 0x1f) << 26 | \
(((u32)(vend_chr_1) - '@') & 0x1f) << 21 | \
(((u32)(vend_chr_2) - '@') & 0x1f) << 16 | \
((product_id) & 0xffff))
/**
* drm_edid_decode_panel_id - Decode a panel ID from drm_edid_encode_panel_id()
* @panel_id: The panel ID to decode.
* @vend: A 4-byte buffer to store the 3-letter vendor string plus a '\0'
* termination
* @product_id: The product ID will be returned here.
*
* For instance, after:
* drm_edid_decode_panel_id(0x09e52d08, vend, &product_id)
* These will be true:
* vend[0] = 'B'
* vend[1] = 'O'
* vend[2] = 'E'
* vend[3] = '\0'
* product_id = 0x2d08
*/
static inline void drm_edid_decode_panel_id(u32 panel_id, char vend[4], u16 *product_id)
{
*product_id = (u16)(panel_id & 0xffff);
drm_edid_decode_mfg_id(panel_id >> 16, vend);
}
bool drm_probe_ddc(struct i2c_adapter *adapter);
struct edid *drm_do_get_edid(struct drm_connector *connector,
int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
size_t len),
void *data);
struct edid *drm_get_edid(struct drm_connector *connector,
struct i2c_adapter *adapter);
u32 drm_edid_get_panel_id(struct i2c_adapter *adapter);
struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
struct i2c_adapter *adapter);
struct edid *drm_edid_duplicate(const struct edid *edid);
int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
int drm_edid_override_connector_update(struct drm_connector *connector);
u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
bool drm_detect_hdmi_monitor(const struct edid *edid);
bool drm_detect_monitor_audio(const struct edid *edid);
enum hdmi_quantization_range
drm_default_rgb_quant_range(const struct drm_display_mode *mode);
int drm_add_modes_noedid(struct drm_connector *connector,
int hdisplay, int vdisplay);
int drm_edid_header_is_valid(const void *edid);
bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
bool *edid_corrupt);
bool drm_edid_is_valid(struct edid *edid);
void drm_edid_get_monitor_name(const struct edid *edid, char *name,
int buflen);
struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh,
bool rb);
struct drm_display_mode *
drm_display_mode_from_cea_vic(struct drm_device *dev,
u8 video_code);
/* Interface based on struct drm_edid */
const struct drm_edid *drm_edid_alloc(const void *edid, size_t size);
const struct drm_edid *drm_edid_dup(const struct drm_edid *drm_edid);
void drm_edid_free(const struct drm_edid *drm_edid);
bool drm_edid_valid(const struct drm_edid *drm_edid);
const struct edid *drm_edid_raw(const struct drm_edid *drm_edid);
const struct drm_edid *drm_edid_read(struct drm_connector *connector);
const struct drm_edid *drm_edid_read_ddc(struct drm_connector *connector,
struct i2c_adapter *adapter);
const struct drm_edid *drm_edid_read_custom(struct drm_connector *connector,
int (*read_block)(void *context, u8 *buf, unsigned int block, size_t len),
void *context);
const struct drm_edid *drm_edid_read_switcheroo(struct drm_connector *connector,
struct i2c_adapter *adapter);
int drm_edid_connector_update(struct drm_connector *connector,
const struct drm_edid *edid);
int drm_edid_connector_add_modes(struct drm_connector *connector);
bool drm_edid_is_digital(const struct drm_edid *drm_edid);
const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
int ext_id, int *ext_index);
#endif /* __DRM_EDID_H__ */
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