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-rw-r--r--include/drm/drm_edid.h343
1 files changed, 120 insertions, 223 deletions
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 18f6c700f6d0..04f7a7f1f108 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -24,10 +24,15 @@
#define __DRM_EDID_H__
#include <linux/types.h>
-#include <linux/hdmi.h>
-#include <drm/drm_mode.h>
+enum hdmi_quantization_range;
+struct drm_connector;
struct drm_device;
+struct drm_display_mode;
+struct drm_edid;
+struct drm_printer;
+struct hdmi_avi_infoframe;
+struct hdmi_vendor_infoframe;
struct i2c_adapter;
#define EDID_LENGTH 128
@@ -45,7 +50,7 @@ struct est_timings {
u8 t1;
u8 t2;
u8 mfg_rsvd;
-} __attribute__((packed));
+} __packed;
/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
#define EDID_TIMING_ASPECT_SHIFT 6
@@ -58,7 +63,7 @@ struct est_timings {
struct std_timing {
u8 hsize; /* need to multiply by 8 then add 248 */
u8 vfreq_aspect;
-} __attribute__((packed));
+} __packed;
#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
@@ -84,17 +89,32 @@ struct detailed_pixel_timing {
u8 hborder;
u8 vborder;
u8 misc;
-} __attribute__((packed));
+} __packed;
/* If it's not pixel timing, it'll be one of the below */
struct detailed_data_string {
u8 str[13];
-} __attribute__((packed));
+} __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)
-#define DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG 0x00
-#define DRM_EDID_RANGE_LIMITS_ONLY_FLAG 0x01
-#define DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG 0x02
-#define DRM_EDID_CVT_SUPPORT_FLAG 0x04
+enum drm_edid_quirk {
+ /* Do a dummy read before DPCD accesses, to prevent corruption. */
+ DRM_EDID_QUIRK_DP_DPCD_PROBE,
+
+ DRM_EDID_QUIRK_NUM,
+};
struct detailed_data_monitor_range {
u8 min_vfreq;
@@ -111,7 +131,7 @@ struct detailed_data_monitor_range {
__le16 m;
u8 k;
u8 j; /* need to divide by 2 */
- } __attribute__((packed)) gtf2;
+ } __packed gtf2;
struct {
u8 version;
u8 data1; /* high 6 bits: extra clock resolution */
@@ -120,27 +140,27 @@ struct detailed_data_monitor_range {
u8 flags; /* preferred aspect and blanking support */
u8 supported_scalings;
u8 preferred_refresh;
- } __attribute__((packed)) cvt;
- } formula;
-} __attribute__((packed));
+ } __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 */
-} __attribute__((packed));
+} __packed;
struct detailed_data_color_point {
u8 windex1;
u8 wpindex1[3];
u8 windex2;
u8 wpindex2[3];
-} __attribute__((packed));
+} __packed;
struct cvt_timing {
u8 code[3];
-} __attribute__((packed));
+} __packed;
struct detailed_non_pixel {
u8 pad1;
@@ -154,8 +174,8 @@ struct detailed_non_pixel {
struct detailed_data_wpindex color;
struct std_timing timings[6];
struct cvt_timing cvt[4];
- } data;
-} __attribute__((packed));
+ } __packed data;
+} __packed;
#define EDID_DETAIL_EST_TIMINGS 0xf7
#define EDID_DETAIL_CVT_3BYTE 0xf8
@@ -172,8 +192,8 @@ struct detailed_timing {
union {
struct detailed_pixel_timing pixel_data;
struct detailed_non_pixel other_data;
- } data;
-} __attribute__((packed));
+ } __packed data;
+} __packed;
#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
#define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1)
@@ -200,7 +220,8 @@ struct detailed_timing {
#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)
+#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 */
@@ -259,72 +280,27 @@ struct detailed_timing {
#define DRM_EDID_DSC_MAX_SLICES 0xf
#define DRM_EDID_DSC_TOTAL_CHUNK_KBYTES 0x3f
-/* ELD Header Block */
-#define DRM_ELD_HEADER_BLOCK_SIZE 4
-
-#define DRM_ELD_VER 0
-# define DRM_ELD_VER_SHIFT 3
-# define DRM_ELD_VER_MASK (0x1f << 3)
-# define DRM_ELD_VER_CEA861D (2 << 3) /* supports 861D or below */
-# define DRM_ELD_VER_CANNED (0x1f << 3)
-
-#define DRM_ELD_BASELINE_ELD_LEN 2 /* in dwords! */
-
-/* ELD Baseline Block for ELD_Ver == 2 */
-#define DRM_ELD_CEA_EDID_VER_MNL 4
-# define DRM_ELD_CEA_EDID_VER_SHIFT 5
-# define DRM_ELD_CEA_EDID_VER_MASK (7 << 5)
-# define DRM_ELD_CEA_EDID_VER_NONE (0 << 5)
-# define DRM_ELD_CEA_EDID_VER_CEA861 (1 << 5)
-# define DRM_ELD_CEA_EDID_VER_CEA861A (2 << 5)
-# define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5)
-# define DRM_ELD_MNL_SHIFT 0
-# define DRM_ELD_MNL_MASK (0x1f << 0)
-
-#define DRM_ELD_SAD_COUNT_CONN_TYPE 5
-# define DRM_ELD_SAD_COUNT_SHIFT 4
-# define DRM_ELD_SAD_COUNT_MASK (0xf << 4)
-# define DRM_ELD_CONN_TYPE_SHIFT 2
-# define DRM_ELD_CONN_TYPE_MASK (3 << 2)
-# define DRM_ELD_CONN_TYPE_HDMI (0 << 2)
-# define DRM_ELD_CONN_TYPE_DP (1 << 2)
-# define DRM_ELD_SUPPORTS_AI (1 << 1)
-# define DRM_ELD_SUPPORTS_HDCP (1 << 0)
-
-#define DRM_ELD_AUD_SYNCH_DELAY 6 /* in units of 2 ms */
-# define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa /* 500 ms */
-
-#define DRM_ELD_SPEAKER 7
-# define DRM_ELD_SPEAKER_MASK 0x7f
-# define DRM_ELD_SPEAKER_RLRC (1 << 6)
-# define DRM_ELD_SPEAKER_FLRC (1 << 5)
-# define DRM_ELD_SPEAKER_RC (1 << 4)
-# define DRM_ELD_SPEAKER_RLR (1 << 3)
-# define DRM_ELD_SPEAKER_FC (1 << 2)
-# define DRM_ELD_SPEAKER_LFE (1 << 1)
-# define DRM_ELD_SPEAKER_FLR (1 << 0)
-
-#define DRM_ELD_PORT_ID 8 /* offsets 8..15 inclusive */
-# define DRM_ELD_PORT_ID_LEN 8
-
-#define DRM_ELD_MANUFACTURER_NAME0 16
-#define DRM_ELD_MANUFACTURER_NAME1 17
-
-#define DRM_ELD_PRODUCT_CODE0 18
-#define DRM_ELD_PRODUCT_CODE1 19
-
-#define DRM_ELD_MONITOR_NAME_STRING 20 /* offsets 20..(20+mnl-1) inclusive */
-
-#define DRM_ELD_CEA_SAD(mnl, sad) (20 + (mnl) + 3 * (sad))
+struct drm_edid_product_id {
+ __be16 manufacturer_name;
+ __le16 product_code;
+ __le32 serial_number;
+ u8 week_of_manufacture;
+ u8 year_of_manufacture;
+} __packed;
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;
+ union {
+ struct drm_edid_product_id product_id;
+ struct {
+ u8 mfg_id[2];
+ u8 prod_code[2];
+ u32 serial; /* FIXME: byte order */
+ u8 mfg_week;
+ u8 mfg_year;
+ } __packed;
+ } __packed;
/* EDID version */
u8 version;
u8 revision;
@@ -355,7 +331,20 @@ struct edid {
u8 extensions;
/* Checksum */
u8 checksum;
-} __attribute__((packed));
+} __packed;
+
+/* EDID matching */
+struct drm_edid_ident {
+ /* ID encoded by drm_edid_encode_panel_id() */
+ u32 panel_id;
+ const char *name;
+};
+
+#define DRM_EDID_IDENT_INIT(_vend_chr_0, _vend_chr_1, _vend_chr_2, _product_id, _name) \
+{ \
+ .panel_id = drm_edid_encode_panel_id(_vend_chr_0, _vend_chr_1, _vend_chr_2, _product_id), \
+ .name = _name, \
+}
#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
@@ -367,30 +356,11 @@ struct cea_sad {
u8 byte2; /* meaning depends on format */
};
-struct drm_encoder;
-struct drm_connector;
-struct drm_connector_state;
-struct drm_display_mode;
-
-int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
-int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
+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);
-#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
-struct edid *drm_load_edid_firmware(struct drm_connector *connector);
-int __drm_set_edid_firmware_path(const char *path);
-int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
-#else
-static inline struct edid *
-drm_load_edid_firmware(struct drm_connector *connector)
-{
- return ERR_PTR(-ENOENT);
-}
-#endif
-
-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,
@@ -401,111 +371,25 @@ drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
const struct drm_display_mode *mode);
void
-drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
- const struct drm_connector_state *conn_state);
-
-void
-drm_hdmi_avi_infoframe_bars(struct hdmi_avi_infoframe *frame,
- const struct drm_connector_state *conn_state);
-
-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);
-int
-drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
- const struct drm_connector_state *conn_state);
-
/**
- * drm_eld_mnl - Get ELD monitor name length in bytes.
- * @eld: pointer to an eld memory structure with mnl set
- */
-static inline int drm_eld_mnl(const uint8_t *eld)
-{
- return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
-}
-
-/**
- * drm_eld_sad - Get ELD SAD structures.
- * @eld: pointer to an eld memory structure with sad_count set
- */
-static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
-{
- unsigned int ver, mnl;
-
- ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
- if (ver != 2 && ver != 31)
- return NULL;
-
- mnl = drm_eld_mnl(eld);
- if (mnl > 16)
- return NULL;
-
- return eld + DRM_ELD_CEA_SAD(mnl, 0);
-}
-
-/**
- * drm_eld_sad_count - Get ELD SAD count.
- * @eld: pointer to an eld memory structure with sad_count set
- */
-static inline int drm_eld_sad_count(const uint8_t *eld)
-{
- return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
- DRM_ELD_SAD_COUNT_SHIFT;
-}
-
-/**
- * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
- * @eld: pointer to an eld memory structure with mnl and sad_count set
- *
- * This is a helper for determining the payload size of the baseline block, in
- * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
- */
-static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
-{
- return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
- drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
-}
-
-/**
- * drm_eld_size - Get ELD size in bytes
- * @eld: pointer to a complete eld memory structure
- *
- * The returned value does not include the vendor block. It's vendor specific,
- * and comprises of the remaining bytes in the ELD memory buffer after
- * drm_eld_size() bytes of header and baseline block.
- *
- * The returned value is guaranteed to be a multiple of 4.
- */
-static inline int drm_eld_size(const uint8_t *eld)
-{
- return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
-}
-
-/**
- * drm_eld_get_spk_alloc - Get speaker allocation
- * @eld: pointer to an ELD memory structure
- *
- * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
- * field definitions to identify speakers.
+ * 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 u8 drm_eld_get_spk_alloc(const uint8_t *eld)
+static inline const char *drm_edid_decode_mfg_id(u16 mfg_id, char vend[4])
{
- return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
-}
+ vend[0] = '@' + ((mfg_id >> 10) & 0x1f);
+ vend[1] = '@' + ((mfg_id >> 5) & 0x1f);
+ vend[2] = '@' + ((mfg_id >> 0) & 0x1f);
+ vend[3] = '\0';
-/**
- * drm_eld_get_conn_type - Get device type hdmi/dp connected
- * @eld: pointer to an ELD memory structure
- *
- * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
- * identify the display type connected.
- */
-static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
-{
- return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
+ return vend;
}
/**
@@ -548,41 +432,29 @@ static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
static inline void drm_edid_decode_panel_id(u32 panel_id, char vend[4], u16 *product_id)
{
*product_id = (u16)(panel_id & 0xffff);
- vend[0] = '@' + ((panel_id >> 26) & 0x1f);
- vend[1] = '@' + ((panel_id >> 21) & 0x1f);
- vend[2] = '@' + ((panel_id >> 16) & 0x1f);
- vend[3] = '\0';
+ 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_add_override_edid_modes(struct drm_connector *connector);
+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(struct edid *edid);
-bool drm_detect_monitor_audio(struct edid *edid);
+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);
-void drm_set_preferred_mode(struct drm_connector *connector,
- int hpref, int vpref);
+ unsigned int hdisplay, unsigned int vdisplay);
-int drm_edid_header_is_valid(const u8 *raw_edid);
-bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
- bool *edid_corrupt);
+int drm_edid_header_is_valid(const void *edid);
bool drm_edid_is_valid(struct edid *edid);
-void drm_edid_get_monitor_name(struct edid *edid, char *name,
+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,
@@ -590,8 +462,33 @@ struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
struct drm_display_mode *
drm_display_mode_from_cea_vic(struct drm_device *dev,
u8 video_code);
-const u8 *drm_find_edid_extension(const struct edid *edid,
- int ext_id, int *ext_index);
+/* 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_base_block(struct i2c_adapter *adapter);
+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);
+void drm_edid_get_product_id(const struct drm_edid *drm_edid,
+ struct drm_edid_product_id *id);
+void drm_edid_print_product_id(struct drm_printer *p,
+ const struct drm_edid_product_id *id, bool raw);
+u32 drm_edid_get_panel_id(const struct drm_edid *drm_edid);
+bool drm_edid_match(const struct drm_edid *drm_edid,
+ const struct drm_edid_ident *ident);
+bool drm_edid_has_quirk(struct drm_connector *connector, enum drm_edid_quirk quirk);
#endif /* __DRM_EDID_H__ */
generated by cgit (git 2.34.1) at 2025-12-25 21:39:17 +0000