From 70d6e4dcd0790543079c92287d683231477af2d5 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Thu, 10 Feb 2022 12:36:46 +0200
Subject: drm/i915/opregion: debug log about Mailbox #2 for backlight
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Git-commit: a391e06958b2fe3f53171ba04f60dadf17b09d5b
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Start debug logging about the presence of the new Mailbox #2 for
backlight. Actual support is to be added later.
Cc: Ville Syrj채l채 <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrj채l채 <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/42fd9cd777c5cc9a8d48db9dd8306924c735918e.1644489329.git.jani.nikula@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
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 11de19da0948..f31e8c3f8ce0 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;
--
2.38.1