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drm/i915/bios: bump expected child device size

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VBT versions since 256 have an extra byte for EFP index.

v2: Update BUILD_BUG_ON() (Matt)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240226175854.287871-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula 2024-02-26 19:58:52 +02:00
parent 06d0742985
commit 5216ec0eea
2 changed files with 5 additions and 2 deletions
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6
drivers/gpu/drm/i915/display/intel_bios.c
View File

@ -2740,11 +2740,13 @@ parse_general_definitions(struct drm_i915_private *i915)
expected_size = 37;
} else if (i915->display.vbt.version <= 215) {
expected_size = 38;
} else if (i915->display.vbt.version <= 250) {
} else if (i915->display.vbt.version <= 255) {
expected_size = 39;
} else if (i915->display.vbt.version <= 256) {
expected_size = 40;
} else {
expected_size = sizeof(*child);
BUILD_BUG_ON(sizeof(*child) < 39);
BUILD_BUG_ON(sizeof(*child) < 40);
drm_dbg(&i915->drm,
"Expected child device config size for VBT version %u not known; assuming %u\n",
i915->display.vbt.version, expected_size);

1
drivers/gpu/drm/i915/display/intel_vbt_defs.h
View File

@ -485,6 +485,7 @@ struct child_device_config {
u8 hdmi_iboost_level:4; /* 196+ */
u8 dp_max_link_rate:3; /* 216+ */
u8 dp_max_link_rate_reserved:5; /* 216+ */
u8 efp_index; /* 256+ */
} __packed;
struct bdb_general_definitions {