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[11/35] drm/i915/bios: Define VBT block 5 (Generic Mode Table)

Message ID 20240503122449.27266-12-ville.syrjala@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915/bios: Define (almost) all BDB blocks | expand

Commit Message

Ville Syrjala May 3, 2024, 12:24 p.m. UTC 
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

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>
---
 drivers/gpu/drm/i915/display/intel_vbt_defs.h | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index c9ecf3b48999..f3478a20ff16 100644
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -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
  */