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intel_extreme: define bdb header values, check panel type.

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Change-Id: I2e5b61da9aecc11be13178a0b48211d172454d94
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4773
Reviewed-by: Adrien Destugues <[email protected]>
This commit is contained in:
Jérôme Duval
2021-12-11 13:30:20 +00:00
committed by Adrien Destugues
parent d2e4af7873
commit 17e8767959
1 changed files with 14 additions and 3 deletions
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src/add-ons/kernel/drivers/graphics/intel_extreme/bios.cpp
+14 -3
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@@ -39,6 +39,12 @@ struct bdb_header {
} __attribute__((packed));
enum bdb_block_id {
BDB_LVDS_OPTIONS = 40,
BDB_LVDS_LFP_DATA_PTRS
};
// FIXME the struct definition for the bdb_header is not complete, so we rely
// on direct access with hardcoded offsets to get the timings out of it.
#define _PIXEL_CLOCK(x) (x[0] + (x[1] << 8)) * 10000
@@ -212,17 +218,22 @@ get_lvds_mode_from_bios(display_timing* panelTiming)
int id = vbios.memory[start];
blockSize = vbios.ReadWord(start + 1) + 3;
switch (id) {
case 40: // Item BDB_LVDS_OPTIONS
case BDB_LVDS_OPTIONS:
{
struct lvds_bdb1 *lvds1;
lvds1 = (struct lvds_bdb1 *)(vbios.memory + start);
panelType = lvds1->panel_type;
if (panelType > 0xf) {
TRACE((DEVICE_NAME ": invalid panel type %d\n", panelType));
panelType = -1;
break;
}
TRACE((DEVICE_NAME ": panel type: %d\n", panelType));
break;
}
case 41: // Item BDB_LVDS_LFP_DATA_PTRS
case BDB_LVDS_LFP_DATA_PTRS:
{
// First make sure we found block 40 and the panel type
// First make sure we found block BDB_LVDS_OPTIONS and the panel type
if (panelType == -1)
break;