1 files changed, 79 insertions, 56 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c b/drivers/gpu/drm/i915/display/intel_dmc.c
index eff3add70611..257aa2b7cf20 100644
--- a/drivers/gpu/drm/i915/display/intel_dmc.c
+++ b/drivers/gpu/drm/i915/display/intel_dmc.c
@@ -42,62 +42,61 @@
 #define DMC_VERSION_MAJOR(version)	((version) >> 16)
 #define DMC_VERSION_MINOR(version)	((version) & 0xffff)
 
-#define DMC_PATH(platform, major, minor) \
-	"i915/"				 \
-	__stringify(platform) "_dmc_ver" \
-	__stringify(major) "_"		 \
+#define DMC_PATH(platform) \
+	"i915/" __stringify(platform) "_dmc.bin"
+
+/*
+ * New DMC additions should not use this. This is used solely to remain
+ * compatible with systems that have not yet updated DMC blobs to use
+ * unversioned file names.
+ */
+#define DMC_LEGACY_PATH(platform, major, minor) \
+	"i915/"					\
+	__stringify(platform) "_dmc_ver"	\
+	__stringify(major) "_"			\
 	__stringify(minor) ".bin"
 
 #define DISPLAY_VER13_DMC_MAX_FW_SIZE	0x20000
 
 #define DISPLAY_VER12_DMC_MAX_FW_SIZE	ICL_DMC_MAX_FW_SIZE
 
-#define DG2_DMC_PATH			DMC_PATH(dg2, 2, 08)
-#define DG2_DMC_VERSION_REQUIRED	DMC_VERSION(2, 8)
+#define DG2_DMC_PATH			DMC_LEGACY_PATH(dg2, 2, 08)
 MODULE_FIRMWARE(DG2_DMC_PATH);
 
-#define ADLP_DMC_PATH			DMC_PATH(adlp, 2, 16)
-#define ADLP_DMC_VERSION_REQUIRED	DMC_VERSION(2, 16)
+#define ADLP_DMC_PATH			DMC_PATH(adlp)
+#define ADLP_DMC_FALLBACK_PATH		DMC_LEGACY_PATH(adlp, 2, 16)
 MODULE_FIRMWARE(ADLP_DMC_PATH);
+MODULE_FIRMWARE(ADLP_DMC_FALLBACK_PATH);
 
-#define ADLS_DMC_PATH			DMC_PATH(adls, 2, 01)
-#define ADLS_DMC_VERSION_REQUIRED	DMC_VERSION(2, 1)
+#define ADLS_DMC_PATH			DMC_LEGACY_PATH(adls, 2, 01)
 MODULE_FIRMWARE(ADLS_DMC_PATH);
 
-#define DG1_DMC_PATH			DMC_PATH(dg1, 2, 02)
-#define DG1_DMC_VERSION_REQUIRED	DMC_VERSION(2, 2)
+#define DG1_DMC_PATH			DMC_LEGACY_PATH(dg1, 2, 02)
 MODULE_FIRMWARE(DG1_DMC_PATH);
 
-#define RKL_DMC_PATH			DMC_PATH(rkl, 2, 03)
-#define RKL_DMC_VERSION_REQUIRED	DMC_VERSION(2, 3)
+#define RKL_DMC_PATH			DMC_LEGACY_PATH(rkl, 2, 03)
 MODULE_FIRMWARE(RKL_DMC_PATH);
 
-#define TGL_DMC_PATH			DMC_PATH(tgl, 2, 12)
-#define TGL_DMC_VERSION_REQUIRED	DMC_VERSION(2, 12)
+#define TGL_DMC_PATH			DMC_LEGACY_PATH(tgl, 2, 12)
 MODULE_FIRMWARE(TGL_DMC_PATH);
 
-#define ICL_DMC_PATH			DMC_PATH(icl, 1, 09)
-#define ICL_DMC_VERSION_REQUIRED	DMC_VERSION(1, 9)
+#define ICL_DMC_PATH			DMC_LEGACY_PATH(icl, 1, 09)
 #define ICL_DMC_MAX_FW_SIZE		0x6000
 MODULE_FIRMWARE(ICL_DMC_PATH);
 
-#define GLK_DMC_PATH			DMC_PATH(glk, 1, 04)
-#define GLK_DMC_VERSION_REQUIRED	DMC_VERSION(1, 4)
+#define GLK_DMC_PATH			DMC_LEGACY_PATH(glk, 1, 04)
 #define GLK_DMC_MAX_FW_SIZE		0x4000
 MODULE_FIRMWARE(GLK_DMC_PATH);
 
-#define KBL_DMC_PATH			DMC_PATH(kbl, 1, 04)
-#define KBL_DMC_VERSION_REQUIRED	DMC_VERSION(1, 4)
+#define KBL_DMC_PATH			DMC_LEGACY_PATH(kbl, 1, 04)
 #define KBL_DMC_MAX_FW_SIZE		BXT_DMC_MAX_FW_SIZE
 MODULE_FIRMWARE(KBL_DMC_PATH);
 
-#define SKL_DMC_PATH			DMC_PATH(skl, 1, 27)
-#define SKL_DMC_VERSION_REQUIRED	DMC_VERSION(1, 27)
+#define SKL_DMC_PATH			DMC_LEGACY_PATH(skl, 1, 27)
 #define SKL_DMC_MAX_FW_SIZE		BXT_DMC_MAX_FW_SIZE
 MODULE_FIRMWARE(SKL_DMC_PATH);
 
-#define BXT_DMC_PATH			DMC_PATH(bxt, 1, 07)
-#define BXT_DMC_VERSION_REQUIRED	DMC_VERSION(1, 7)
+#define BXT_DMC_PATH			DMC_LEGACY_PATH(bxt, 1, 07)
 #define BXT_DMC_MAX_FW_SIZE		0x3000
 MODULE_FIRMWARE(BXT_DMC_PATH);
 
@@ -108,6 +107,8 @@ MODULE_FIRMWARE(BXT_DMC_PATH);
 #define DMC_V3_MAX_MMIO_COUNT		20
 #define DMC_V1_MMIO_START_RANGE		0x80000
 
+#define PIPE_TO_DMC_ID(pipe)		 (DMC_FW_PIPEA + ((pipe) - PIPE_A))
+
 struct intel_css_header {
 	/* 0x09 for DMC */
 	u32 module_type;
@@ -387,11 +388,11 @@ static void pipedmc_clock_gating_wa(struct drm_i915_private *i915, bool enable)
 {
 	enum pipe pipe;
 
-	if (DISPLAY_VER(i915) != 13)
+	if (DISPLAY_VER(i915) < 13)
 		return;
 
 	/*
-	 * Wa_16015201720:adl-p,dg2
+	 * Wa_16015201720:adl-p,dg2, mtl
 	 * The WA requires clock gating to be disabled all the time
 	 * for pipe A and B.
 	 * For pipe C and D clock gating needs to be disabled only
@@ -407,6 +408,28 @@ static void pipedmc_clock_gating_wa(struct drm_i915_private *i915, bool enable)
 				     PIPEDMC_GATING_DIS, 0);
 }
 
+void intel_dmc_enable_pipe(struct drm_i915_private *i915, enum pipe pipe)
+{
+	if (!has_dmc_id_fw(i915, PIPE_TO_DMC_ID(pipe)))
+		return;
+
+	if (DISPLAY_VER(i915) >= 14)
+		intel_de_rmw(i915, MTL_PIPEDMC_CONTROL, 0, PIPEDMC_ENABLE_MTL(pipe));
+	else
+		intel_de_rmw(i915, PIPEDMC_CONTROL(pipe), 0, PIPEDMC_ENABLE);
+}
+
+void intel_dmc_disable_pipe(struct drm_i915_private *i915, enum pipe pipe)
+{
+	if (!has_dmc_id_fw(i915, PIPE_TO_DMC_ID(pipe)))
+		return;
+
+	if (DISPLAY_VER(i915) >= 14)
+		intel_de_rmw(i915, MTL_PIPEDMC_CONTROL, PIPEDMC_ENABLE_MTL(pipe), 0);
+	else
+		intel_de_rmw(i915, PIPEDMC_CONTROL(pipe), PIPEDMC_ENABLE, 0);
+}
+
 /**
  * intel_dmc_load_program() - write the firmware from memory to register.
  * @dev_priv: i915 drm device.
@@ -433,9 +456,9 @@ void intel_dmc_load_program(struct drm_i915_private *dev_priv)
 
 	for (id = 0; id < DMC_FW_MAX; id++) {
 		for (i = 0; i < dmc->dmc_info[id].dmc_fw_size; i++) {
-			intel_uncore_write_fw(&dev_priv->uncore,
-					      DMC_PROGRAM(dmc->dmc_info[id].start_mmioaddr, i),
-					      dmc->dmc_info[id].payload[i]);
+			intel_de_write_fw(dev_priv,
+					  DMC_PROGRAM(dmc->dmc_info[id].start_mmioaddr, i),
+					  dmc->dmc_info[id].payload[i]);
 		}
 	}
 
@@ -765,17 +788,6 @@ static u32 parse_dmc_fw_css(struct intel_dmc *dmc,
 		return 0;
 	}
 
-	if (dmc->required_version &&
-	    css_header->version != dmc->required_version) {
-		drm_info(&i915->drm, "Refusing to load DMC firmware v%u.%u,"
-			 " please use v%u.%u\n",
-			 DMC_VERSION_MAJOR(css_header->version),
-			 DMC_VERSION_MINOR(css_header->version),
-			 DMC_VERSION_MAJOR(dmc->required_version),
-			 DMC_VERSION_MINOR(dmc->required_version));
-		return 0;
-	}
-
 	dmc->version = css_header->version;
 
 	return sizeof(struct intel_css_header);
@@ -843,16 +855,40 @@ static void intel_dmc_runtime_pm_put(struct drm_i915_private *dev_priv)
 	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
 }
 
+static const char *dmc_fallback_path(struct drm_i915_private *i915)
+{
+	if (IS_ALDERLAKE_P(i915))
+		return ADLP_DMC_FALLBACK_PATH;
+
+	return NULL;
+}
+
 static void dmc_load_work_fn(struct work_struct *work)
 {
 	struct drm_i915_private *dev_priv;
 	struct intel_dmc *dmc;
 	const struct firmware *fw = NULL;
+	const char *fallback_path;
+	int err;
 
 	dev_priv = container_of(work, typeof(*dev_priv), display.dmc.work);
 	dmc = &dev_priv->display.dmc;
 
-	request_firmware(&fw, dev_priv->display.dmc.fw_path, dev_priv->drm.dev);
+	err = request_firmware(&fw, dev_priv->display.dmc.fw_path, dev_priv->drm.dev);
+
+	if (err == -ENOENT && !dev_priv->params.dmc_firmware_path) {
+		fallback_path = dmc_fallback_path(dev_priv);
+		if (fallback_path) {
+			drm_dbg_kms(&dev_priv->drm,
+				    "%s not found, falling back to %s\n",
+				    dmc->fw_path,
+				    fallback_path);
+			err = request_firmware(&fw, fallback_path, dev_priv->drm.dev);
+			if (err == 0)
+				dev_priv->display.dmc.fw_path = fallback_path;
+		}
+	}
+
 	parse_dmc_fw(dev_priv, fw);
 
 	if (intel_dmc_has_payload(dev_priv)) {
@@ -903,49 +939,38 @@ void intel_dmc_ucode_init(struct drm_i915_private *dev_priv)
 
 	if (IS_DG2(dev_priv)) {
 		dmc->fw_path = DG2_DMC_PATH;
-		dmc->required_version = DG2_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = DISPLAY_VER13_DMC_MAX_FW_SIZE;
 	} else if (IS_ALDERLAKE_P(dev_priv)) {
 		dmc->fw_path = ADLP_DMC_PATH;
-		dmc->required_version = ADLP_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = DISPLAY_VER13_DMC_MAX_FW_SIZE;
 	} else if (IS_ALDERLAKE_S(dev_priv)) {
 		dmc->fw_path = ADLS_DMC_PATH;
-		dmc->required_version = ADLS_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = DISPLAY_VER12_DMC_MAX_FW_SIZE;
 	} else if (IS_DG1(dev_priv)) {
 		dmc->fw_path = DG1_DMC_PATH;
-		dmc->required_version = DG1_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = DISPLAY_VER12_DMC_MAX_FW_SIZE;
 	} else if (IS_ROCKETLAKE(dev_priv)) {
 		dmc->fw_path = RKL_DMC_PATH;
-		dmc->required_version = RKL_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = DISPLAY_VER12_DMC_MAX_FW_SIZE;
 	} else if (IS_TIGERLAKE(dev_priv)) {
 		dmc->fw_path = TGL_DMC_PATH;
-		dmc->required_version = TGL_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = DISPLAY_VER12_DMC_MAX_FW_SIZE;
 	} else if (DISPLAY_VER(dev_priv) == 11) {
 		dmc->fw_path = ICL_DMC_PATH;
-		dmc->required_version = ICL_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = ICL_DMC_MAX_FW_SIZE;
 	} else if (IS_GEMINILAKE(dev_priv)) {
 		dmc->fw_path = GLK_DMC_PATH;
-		dmc->required_version = GLK_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = GLK_DMC_MAX_FW_SIZE;
 	} else if (IS_KABYLAKE(dev_priv) ||
 		   IS_COFFEELAKE(dev_priv) ||
 		   IS_COMETLAKE(dev_priv)) {
 		dmc->fw_path = KBL_DMC_PATH;
-		dmc->required_version = KBL_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = KBL_DMC_MAX_FW_SIZE;
 	} else if (IS_SKYLAKE(dev_priv)) {
 		dmc->fw_path = SKL_DMC_PATH;
-		dmc->required_version = SKL_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = SKL_DMC_MAX_FW_SIZE;
 	} else if (IS_BROXTON(dev_priv)) {
 		dmc->fw_path = BXT_DMC_PATH;
-		dmc->required_version = BXT_DMC_VERSION_REQUIRED;
 		dmc->max_fw_size = BXT_DMC_MAX_FW_SIZE;
 	}
 
@@ -958,8 +983,6 @@ void intel_dmc_ucode_init(struct drm_i915_private *dev_priv)
 		}
 
 		dmc->fw_path = dev_priv->params.dmc_firmware_path;
-		/* Bypass version check for firmware override. */
-		dmc->required_version = 0;
 	}
 
 	if (!dmc->fw_path) {