From: Sean Paul <seanpaul@chromium.org>
Date: Thu, 30 Jan 2014 21:19:19 +0000 (-0500)
Subject: drm/exynos: Implement mode_fixup manager operation
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4b4052699ae4e913c4d2b965061f10eec122e558;p=linux-beck.git

drm/exynos: Implement mode_fixup manager operation

This patch adds a new manager callback for mode_fixup and pipes it
through exynos_drm_crtc. This will allow the manager drivers to
alter the mode during modeset.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
---

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 7810338591df..9cc92ae6b710 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -105,7 +105,12 @@ exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 			    const struct drm_display_mode *mode,
 			    struct drm_display_mode *adjusted_mode)
 {
-	/* drm framework doesn't check NULL */
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+	struct exynos_drm_manager *manager = exynos_crtc->manager;
+
+	if (manager->ops->mode_fixup)
+		return manager->ops->mode_fixup(manager, mode, adjusted_mode);
+
 	return true;
 }
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index caba2993482e..81f7de4e2a51 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -184,6 +184,7 @@ struct exynos_drm_display {
  * @initialize: initializes the manager with drm_dev
  * @remove: cleans up the manager for removal
  * @dpms: control device power.
+ * @mode_fixup: fix mode data before applying it
  * @mode_set: set the given mode to the manager
  * @commit: set current hw specific display mode to hw.
  * @enable_vblank: specific driver callback for enabling vblank interrupt.
@@ -201,6 +202,9 @@ struct exynos_drm_manager_ops {
 				struct drm_device *drm_dev, int pipe);
 	void (*remove)(struct exynos_drm_manager *mgr);
 	void (*dpms)(struct exynos_drm_manager *mgr, int mode);
+	bool (*mode_fixup)(struct exynos_drm_manager *mgr,
+				const struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode);
 	void (*mode_set)(struct exynos_drm_manager *mgr,
 				const struct drm_display_mode *mode);
 	void (*commit)(struct exynos_drm_manager *mgr);