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drm/i915/bios: Define VBT block 5 (Generic Mode Table)

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Define the contents of VBT block 5 (Generic Mode Table).

Details were mostly gleaned from some VBIOS sources.

There are apparently two variants of the block: ALM only
vs. MGM, defined here as bdb_generic_mode_table_alm
and bdb_generic_mode_table_mgm. And those are the only two
platforms where I've seen this block.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-12-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2024-05-03 15:24:25 +03:00
parent 22794e6cee
commit 2e8b807317
1 changed files with 54 additions and 0 deletions
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54
drivers/gpu/drm/i915/display/intel_vbt_defs.h
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@ -580,6 +580,60 @@ struct bdb_mode_support_list {
u16 mode_list_length;
} __packed;
/*
* Block 5 - Generic Mode Table
*/
struct generic_mode_table {
u16 x_res;
u16 y_res;
u8 color_depths;
u8 refresh_rate[3];
u8 reserved;
u8 text_cols;
u8 text_rows;
u8 font_height;
u16 page_size;
u8 misc;
} __packed;
struct generic_mode_timings {
u32 dotclock_khz;
u16 hdisplay;
u16 htotal;
u16 hblank_start;
u16 hblank_end;
u16 hsync_start;
u16 hsync_end;
u16 vdisplay;
u16 vtotal;
u16 vblank_start;
u16 vblank_end;
u16 vsync_start;
u16 vsync_end;
} __packed;
struct generic_mode_timings_alm {
struct generic_mode_timings timings;
u8 wm_8bpp;
u8 burst_8bpp;
u8 wm_16bpp;
u8 burst_16bpp;
u8 wm_32bpp;
u8 burst_32bpp;
} __packed;
struct bdb_generic_mode_table_alm {
struct generic_mode_table table;
struct generic_mode_timings_alm timings[3];
} __packed;
struct bdb_generic_mode_table_mgm {
u16 mode_flag;
struct generic_mode_table table;
struct generic_mode_timings timings[3];
} __packed;
/*
* Block 9 - SRD Feature Block
*/