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| author | Jouni Högander <jouni.hogander@intel.com> | 2022-06-10 11:54:27 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2022-06-16 13:15:36 +0300 |
| commit | eb2983c09f4e053f2c3362763f5e1073b5e4cd7d (patch) | |
| tree | 5592ee5219fe68b2ed1da0fbccd7f77f1d1cbc2e /drivers/gpu/drm/i915/display/intel_opregion.c | |
| parent | 8d2ba05b099aedfcece0326a5bbb2e7cc33261ae (diff) | |
| download | linux-eb2983c09f4e053f2c3362763f5e1073b5e4cd7d.tar.gz linux-eb2983c09f4e053f2c3362763f5e1073b5e4cd7d.tar.bz2 linux-eb2983c09f4e053f2c3362763f5e1073b5e4cd7d.zip | |
drm/i915/opregion: add function to check if headless sku
Export headless sku bit (bit 13) from opregion->header->pcon as an
interface to check if our device is headless configuration.
This is mainly targeted for hybrid gfx systems. E.g. when display
is not supposed to be connected discrete graphics card it's
opregion can inform this is headless graphics card.
v3: Dummy version is now static inline function
v2: Check also opregion version
Bspec: 53441
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220610085429.52935-2-jouni.hogander@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_opregion.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_opregion.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c index f31e8c3f8ce0..6876ba30d5a9 100644 --- a/drivers/gpu/drm/i915/display/intel_opregion.c +++ b/drivers/gpu/drm/i915/display/intel_opregion.c @@ -53,6 +53,8 @@ #define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */ #define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */ +#define PCON_HEADLESS_SKU BIT(13) + struct opregion_header { u8 signature[16]; u32 size; @@ -1135,6 +1137,18 @@ struct edid *intel_opregion_get_edid(struct intel_connector *intel_connector) return new_edid; } +bool intel_opregion_headless_sku(struct drm_i915_private *i915) +{ + struct intel_opregion *opregion = &i915->opregion; + struct opregion_header *header = opregion->header; + + if (!header || header->over.major < 2 || + (header->over.major == 2 && header->over.minor < 3)) + return false; + + return opregion->header->pcon & PCON_HEADLESS_SKU; +} + void intel_opregion_register(struct drm_i915_private *i915) { struct intel_opregion *opregion = &i915->opregion; |