[Intel-gfx] [PATCH 29/56] drm/i915/adl_p: Load DMC

[Matt Roper]

From: Anusha Srivatsa <anusha.srivatsa at intel.com>

Load DMC v2.08 on ADLP. The release notes mention that
this version enables few power savings features.

Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Cc: Clint Taylor <clinton.a.taylor at intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
Signed-off-by: Clinton Taylor <Clinton.A.Taylor at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/display/intel_csr.c         | 10 +++++++++-
 .../gpu/drm/i915/display/intel_display_power.c   | 16 +++++++++++++++-
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_csr.c b/drivers/gpu/drm/i915/display/intel_csr.c
index 82360593b0a6..863e4566e645 100644
--- a/drivers/gpu/drm/i915/display/intel_csr.c
+++ b/drivers/gpu/drm/i915/display/intel_csr.c
@@ -40,6 +40,10 @@
 
 #define GEN12_CSR_MAX_FW_SIZE		ICL_CSR_MAX_FW_SIZE
 
+#define ADLP_CSR_PATH			"i915/adlp_dmc_ver2_08.bin"
+#define ADLP_CSR_VERSION_REQUIRED	CSR_VERSION(2, 8)
+MODULE_FIRMWARE(ADLP_CSR_PATH);
+
 #define ADLS_CSR_PATH			"i915/adls_dmc_ver2_01.bin"
 #define ADLS_CSR_VERSION_REQUIRED	CSR_VERSION(2, 1)
 MODULE_FIRMWARE(ADLS_CSR_PATH);
@@ -693,7 +697,11 @@ void intel_csr_ucode_init(struct drm_i915_private *dev_priv)
 	 */
 	intel_csr_runtime_pm_get(dev_priv);
 
-	if (IS_ALDERLAKE_S(dev_priv)) {
+	if (IS_ALDERLAKE_P(dev_priv)) {
+		csr->fw_path = ADLP_CSR_PATH;
+		csr->required_version = ADLP_CSR_VERSION_REQUIRED;
+		csr->max_fw_size = GEN12_CSR_MAX_FW_SIZE;
+	} else if (IS_ALDERLAKE_S(dev_priv)) {
 		csr->fw_path = ADLS_CSR_PATH;
 		csr->required_version = ADLS_CSR_VERSION_REQUIRED;
 		csr->max_fw_size = GEN12_CSR_MAX_FW_SIZE;
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 8bb5203dd2da..3b30604e850a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -4953,7 +4953,21 @@ static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
 	int requested_dc;
 	int max_dc;
 
-	if (IS_DG1(dev_priv))
+	if (!HAS_DISPLAY(dev_priv))
+		return 0;
+
+	if (DISPLAY_VER(dev_priv) == 13)
+		/*
+		 * FIXME: We need to disable DC-states for two reasons:
+		 *
+		 *  - Although not documented in the bspec, we've been told
+		 *    that we need to upload Pipe DMC firmwares in addition
+		 *    to the main DMC firmware for DC5 to work properly.
+		 *    We need proper bspec documentation before we can handle
+		 *    this.
+		 */
+		max_dc = 0;
+	else if (IS_DG1(dev_priv))
 		max_dc = 3;
 	else if (DISPLAY_VER(dev_priv) >= 12)
 		max_dc = 4;
-- 
2.25.4