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drm/i915/bios: Define VBT block 4 (Mode Support List) contents

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Define the contents of VBT block 4 (Mode Support List).

Slightly crazy layout with a variable length list at the start,
followed by the length of said list.

No real idea what these "Intel mode numbers" really are. What
I see in real world VBTs seems to be always the same list of
26 numbers, ranging between 0x30 and 0x84.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-11-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2024-05-03 15:24:24 +03:00
parent c58f254be3
commit 22794e6cee
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/i915/display/intel_vbt_defs.h
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@ -571,6 +571,15 @@ struct bdb_display_toggle {
u16 list[]; /* ALM only */
} __packed;
/*
* Block 4 - Mode Support List
*/
struct bdb_mode_support_list {
u8 intel_mode_number[0];
u16 mode_list_length;
} __packed;
/*
* Block 9 - SRD Feature Block
*/