[PATCH] drm/i915: Avoid modeset when content protection changes

[Sean Paul]

From: Sean Paul <seanpaul at chromium.org>

Instead of doing a full modeset to enable/disable content protection,
simply go through the update_pipe flow which was introduced in the
related patch below. This avoids flashing the screen every time the user
starts viewing protected content.

Related: 634852d1f468 ("drm/i915: HDCP state handling in ddi_update_pipe")
Cc: Ramalingam C <ramalingam.c at intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: intel-gfx at lists.freedesktop.org
Signed-off-by: Sean Paul <seanpaul at chromium.org>
---
 drivers/gpu/drm/i915/display/intel_hdcp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 89a4d294822d..839ce1715253 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -2191,7 +2191,7 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
 			return;
 	}
 
-	crtc_state->mode_changed = true;
+	to_intel_crtc_state(crtc_state)->update_pipe = true;
 }
 
 /* Handles the CP_IRQ raised from the DP HDCP sink */
-- 
Sean Paul, Software Engineer, Google / Chromium OS