[Intel-gfx] [RESEND PATCH 3/5] drm/i915: Enable fastset for non-boot modesets.

[Maarten Lankhorst]

Now that our state comparison functions are pretty complete, we should
enable fastset by default when a modeset can be avoided. Even if we're
not completely certain about the inherited state, we can be certain
after the first modeset that our sw state matches the hw state.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 86e7b145fd98..2dd99e5437a5 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11651,6 +11651,11 @@ intel_pipe_config_compare(struct drm_i915_private *dev_priv,
 		(current_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED) &&
 		!(pipe_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED);
 
+	if (fixup_inherited && !i915_modparams.fastboot) {
+		drm_dbg(DRM_UT_KMS, "initial modeset and fastboot not set\n");
+		ret = false;
+	}
+
 #define PIPE_CONF_CHECK_X(name) do { \
 	if (current_config->name != pipe_config->name) { \
 		pipe_config_err(adjust, __stringify(name), \
@@ -12674,8 +12679,7 @@ static int intel_atomic_check(struct drm_device *dev,
 			return ret;
 		}
 
-		if (i915_modparams.fastboot &&
-		    intel_pipe_config_compare(dev_priv,
+		if (intel_pipe_config_compare(dev_priv,
 					to_intel_crtc_state(old_crtc_state),
 					pipe_config, true)) {
 			crtc_state->mode_changed = false;
-- 
2.19.2