drm/i915/adl_p: Pipe B DMC Support

ADLP requires us to load both Pipe A and Pipe B.
Plug Pipe B loading support.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210621191415.29823-4-anusha.srivatsa@intel.com

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

@@ -546,6 +546,8 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
 	seq_printf(m, "path: %s\n", dmc->fw_path);
 	seq_printf(m, "Pipe A fw support: %s\n", yesno(INTEL_GEN(dev_priv) >= 12));
 	seq_printf(m, "Pipe A fw loaded: %s\n", yesno(dmc->dmc_info[DMC_FW_PIPEA].payload));
+	seq_printf(m, "Pipe B fw support: %s\n", yesno(IS_ALDERLAKE_P(dev_priv)));
+	seq_printf(m, "Pipe B fw loaded: %s\n", yesno(dmc->dmc_info[DMC_FW_PIPEB].payload));
 
 	if (!intel_dmc_has_payload(dev_priv))
 		goto out;

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

@@ -19,6 +19,7 @@ struct drm_i915_private;
 enum {
 	DMC_FW_MAIN = 0,
 	DMC_FW_PIPEA,
+	DMC_FW_PIPEB,
 	DMC_FW_MAX
 };