3 files changed, 8 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 84b5db257f1b..95bb27de774f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2651,6 +2651,7 @@ struct i915_params {
         int enable_cmd_parser;
         /* leave bools at the end to not create holes */
         bool enable_hangcheck;
+        bool fastboot;
         bool prefault_disable;
         bool load_detect_test;
         bool reset;
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 96bb23865eac..4be13a5eb932 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -40,6 +40,7 @@ struct i915_params i915 __read_mostly = {
         .preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
         .disable_power_well = -1,
         .enable_ips = 1,
+        .fastboot = 0,
         .prefault_disable = 0,
         .load_detect_test = 0,
         .reset = true,
@@ -133,6 +134,10 @@ MODULE_PARM_DESC(disable_power_well,
 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
 
+module_param_named(fastboot, i915.fastboot, bool, 0600);
+MODULE_PARM_DESC(fastboot,
+        "Try to skip unnecessary mode sets at boot time (default: false)");
+
 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
 MODULE_PARM_DESC(prefault_disable,
         "Disable page prefaulting for pread/pwrite/reloc (default:false). "
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 002e2a41ce1b..71860f8680f9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13068,7 +13068,8 @@ static int intel_atomic_check(struct drm_device *dev,
                 if (ret)
                         return ret;
 
-                if (intel_pipe_config_compare(state->dev,
+                if (i915.fastboot &&
+                    intel_pipe_config_compare(state->dev,
                                         to_intel_crtc_state(crtc->state),
                                         pipe_config, true)) {
                         crtc_state->mode_changed = false;