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@xxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_opregion.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c
index 6e32ed6bbf4e..b1ad11b2ebb3 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.c
+++ b/drivers/gpu/drm/i915/display/intel_opregion.c
@@ -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;
--
2.30.2
