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drm/i915/opregion: debug log about Mailbox #2 for backlight

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Start debug logging about the presence of the new Mailbox #2 for
backlight. Actual support is to be added later.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/42fd9cd777c5cc9a8d48db9dd8306924c735918e.1644489329.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2022-02-10 12:36:46 +02:00
parent 6989817182
commit a391e06958
1 changed files with 9 additions and 4 deletions
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13
drivers/gpu/drm/i915/display/intel_opregion.c
View file

@ -47,10 +47,11 @@
#define OPREGION_ASLE_EXT_OFFSET 0x1C00
#define OPREGION_SIGNATURE "IntelGraphicsMem"
#define MBOX_ACPI (1<<0)
#define MBOX_SWSCI (1<<1)
#define MBOX_ASLE (1<<2)
#define MBOX_ASLE_EXT (1<<4)
#define MBOX_ACPI BIT(0) /* Mailbox #1 */
#define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */
#define MBOX_ASLE BIT(2) /* Mailbox #3 */
#define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */
#define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */
struct opregion_header {
u8 signature[16];
@ -957,6 +958,10 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET;
}
if (mboxes & MBOX_BACKLIGHT) {
drm_dbg(&dev_priv->drm, "Mailbox #2 for backlight present\n");
}
if (intel_load_vbt_firmware(dev_priv) == 0)
goto out;