From: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Date: Tue, 21 Apr 2015 14:13:18 +0000 (+0300)
Subject: drm/atomic: Make mode_fixup() optional for check_modeset()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=840bfe953384a134c8639f2964d9b74bfa671e16;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

drm/atomic: Make mode_fixup() optional for check_modeset()

So the i915 driver can use the same logic for setting mode and active
changed flags, without having to implement encoder helpers and the
mode_fixup() callback.

Cc: dri-devel@lists.freedestkop.org
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 5d30592c83cd..5e68c3c7d5cf 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -280,6 +280,8 @@ mode_fixup(struct drm_atomic_state *state)
 		 */
 		encoder = conn_state->best_encoder;
 		funcs = encoder->helper_private;
+		if (!funcs)
+			continue;
 
 		if (encoder->bridge && encoder->bridge->funcs->mode_fixup) {
 			ret = encoder->bridge->funcs->mode_fixup(
@@ -317,6 +319,9 @@ mode_fixup(struct drm_atomic_state *state)
 			continue;
 
 		funcs = crtc->helper_private;
+		if (!funcs->mode_fixup)
+			continue;
+
 		ret = funcs->mode_fixup(crtc, &crtc_state->mode,
 					&crtc_state->adjusted_mode);
 		if (!ret) {