[Intel-gfx] [PATCH v2] drm/i915/dmc: Load DMC on MTL

[Gustavo Sousa]

From: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep at intel.com>

Add support to load DMC on MTL.

According to the spec and based on tests done on real hardware, 0x7000
is a reasonable size limit that covers each possible payload.

v2:
  - Tighten payload size limit. (Matt, Rodrigo)
  - Use a better name for the defined payload limit. (Rodrigo)

Signed-off-by: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep at intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dmc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c b/drivers/gpu/drm/i915/display/intel_dmc.c
index 6b162f77340e..d84cf9237b9c 100644
--- a/drivers/gpu/drm/i915/display/intel_dmc.c
+++ b/drivers/gpu/drm/i915/display/intel_dmc.c
@@ -89,10 +89,13 @@ static struct intel_dmc *i915_to_dmc(struct drm_i915_private *i915)
 	__stringify(major) "_"			\
 	__stringify(minor) ".bin"
 
+#define XELPDP_DMC_MAX_FW_SIZE		0x7000
 #define DISPLAY_VER13_DMC_MAX_FW_SIZE	0x20000
-
 #define DISPLAY_VER12_DMC_MAX_FW_SIZE	ICL_DMC_MAX_FW_SIZE
 
+#define MTL_DMC_PATH			DMC_PATH(mtl)
+MODULE_FIRMWARE(MTL_DMC_PATH);
+
 #define DG2_DMC_PATH			DMC_LEGACY_PATH(dg2, 2, 08)
 MODULE_FIRMWARE(DG2_DMC_PATH);
 
@@ -979,7 +982,10 @@ void intel_dmc_init(struct drm_i915_private *i915)
 
 	INIT_WORK(&dmc->work, dmc_load_work_fn);
 
-	if (IS_DG2(i915)) {
+	if (IS_METEORLAKE(i915)) {
+		dmc->fw_path = MTL_DMC_PATH;
+		dmc->max_fw_size = XELPDP_DMC_MAX_FW_SIZE;
+	} else if (IS_DG2(i915)) {
 		dmc->fw_path = DG2_DMC_PATH;
 		dmc->max_fw_size = DISPLAY_VER13_DMC_MAX_FW_SIZE;
 	} else if (IS_ALDERLAKE_P(i915)) {
-- 
2.39.2