drm/i915/display: move dmc_firmware_path to display params

The dmc_firmware_path parameter is clearly a display parameter. Move it
there so it's available to both i915 and xe modules. This also cleans up
the ugly member in struct xe_device.
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240321161856.3517856-1-jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_display_params.c

@@ -27,6 +27,9 @@ static struct intel_display_params intel_display_modparams __read_mostly = {
  * debugfs mode to 0.
  */
 
+intel_display_param_named_unsafe(dmc_firmware_path, charp, 0400,
+	"DMC firmware path to use instead of the default one");
+
 intel_display_param_named_unsafe(vbt_firmware, charp, 0400,
 	"Load VBT from specified file under /lib/firmware");
 

drivers/gpu/drm/i915/display/intel_display_params.h

@@ -24,6 +24,7 @@ struct drm_i915_private;
  *       debugfs file
  */
 #define INTEL_DISPLAY_PARAMS_FOR_EACH(param) \
+	param(char *, dmc_firmware_path, NULL, 0400) \
 	param(char *, vbt_firmware, NULL, 0400) \
 	param(int, lvds_channel_mode, 0, 0400) \
 	param(int, panel_use_ssc, -1, 0600) \

drivers/gpu/drm/i915/display/intel_dmc.c

@@ -927,7 +927,7 @@ static void dmc_load_work_fn(struct work_struct *work)
 
 	err = request_firmware(&fw, dmc->fw_path, i915->drm.dev);
 
-	if (err == -ENOENT && !i915->params.dmc_firmware_path) {
+	if (err == -ENOENT && !i915->display.params.dmc_firmware_path) {
 		fallback_path = dmc_fallback_path(i915);
 		if (fallback_path) {
 			drm_dbg_kms(&i915->drm, "%s not found, falling back to %s\n",
@@ -1034,14 +1034,14 @@ void intel_dmc_init(struct drm_i915_private *i915)
 		dmc->max_fw_size = BXT_DMC_MAX_FW_SIZE;
 	}
 
-	if (i915->params.dmc_firmware_path) {
-		if (strlen(i915->params.dmc_firmware_path) == 0) {
+	if (i915->display.params.dmc_firmware_path) {
+		if (strlen(i915->display.params.dmc_firmware_path) == 0) {
 			drm_info(&i915->drm,
 				 "Disabling DMC firmware and runtime PM\n");
 			goto out;
 		}
 
-		dmc->fw_path = i915->params.dmc_firmware_path;
+		dmc->fw_path = i915->display.params.dmc_firmware_path;
 	}
 
 	if (!dmc->fw_path) {

drivers/gpu/drm/i915/i915_params.c

@@ -108,9 +108,6 @@ i915_param_named_unsafe(guc_firmware_path, charp, 0400,
 i915_param_named_unsafe(huc_firmware_path, charp, 0400,
 	"HuC firmware path to use instead of the default one");
 
-i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
-	"DMC firmware path to use instead of the default one");
-
 i915_param_named_unsafe(gsc_firmware_path, charp, 0400,
 	"GSC firmware path to use instead of the default one");
 

drivers/gpu/drm/i915/i915_params.h

@@ -51,7 +51,6 @@ struct drm_printer;
 	param(int, guc_log_level, -1, 0400) \
 	param(char *, guc_firmware_path, NULL, 0400) \
 	param(char *, huc_firmware_path, NULL, 0400) \
-	param(char *, dmc_firmware_path, NULL, 0400) \
 	param(char *, gsc_firmware_path, NULL, 0400) \
 	param(bool, memtest, false, 0400) \
 	param(int, mmio_debug, -IS_ENABLED(CONFIG_DRM_I915_DEBUG_MMIO), 0600) \

drivers/gpu/drm/xe/xe_device_types.h

@@ -524,9 +524,6 @@ struct xe_device {
 		unsigned int fsb_freq, mem_freq, is_ddr3;
 		u8 vblank_enabled;
 	};
-	struct {
-		const char *dmc_firmware_path;
-	} params;
 
 	void *pxp;
 #endif