DGFX cards support both Add in Card(AIC) and Mother Board Down(MBD)
configs. MBD config requires HOST BIOS GPIO toggling support
in order to enable/disable vram_sr using ACPI OpRegion.
i915 requires to check OpRegion PCON MBD Config bits to
discover whether DG1 Card is MBD config before enabling
vram_sr.
v2:
- Removed IS_DG1() cond from intel_opregion_dg1_mbd_config. [Jani]
- Moved intel_opregion_vram_sr_required() to prev patch.
BSpec: 53440
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_opregion.c | 21 +++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c
index f4a2a02c9ed3..03ae57f05371 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.c
+++ b/drivers/gpu/drm/i915/display/intel_opregion.c
@@ -55,6 +55,8 @@
#define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */
#define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */
+#define PCON_DG1_MBD_CONFIG BIT(9)
+#define PCON_DG1_MBD_CONFIG_FIELD_VALID BIT(10)
#define PCON_DGFX_BIOS_SUPPORTS_VRSR BIT(11)
#define PCON_DGFX_BIOS_SUPPORTS_VRSR_FIELD_VALID BIT(12)
#define PCON_HEADLESS_SKU BIT(13)
@@ -1257,6 +1259,19 @@ void intel_opregion_unregister(struct drm_i915_private *i915)
opregion->lid_state = NULL;
}
+static bool intel_opregion_dg1_mbd_config(struct drm_i915_private *i915)
+{
+ struct intel_opregion *opregion = &i915->opregion;
+
+ if (!opregion->header)
+ return false;
+
+ if (opregion->header->pcon & PCON_DG1_MBD_CONFIG_FIELD_VALID)
+ return opregion->header->pcon & PCON_DG1_MBD_CONFIG;
+ else
+ return false;
+}
+
/**
* intel_opregion_vram_sr_required().
* @i915 i915 device priv data.
@@ -1270,6 +1285,12 @@ void intel_opregion_unregister(struct drm_i915_private *i915)
bool
intel_opregion_vram_sr_required(struct drm_i915_private *i915)
{
+ if (!IS_DGFX(i915))
+ return false;
+
+ if (IS_DG1(i915))
+ return intel_opregion_dg1_mbd_config(i915);
+
return false;
}
--
2.26.2
