[PATCH 18/23] drm/exynos: Implement mode_fixup manager operation

[Sean Paul]

This patch adds a new manager callback for mode_fixup and pipes it
through exynos_drm_crtc.

Signed-off-by: Sean Paul <seanp...@chromium.org>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c | 8 +++++++-
 drivers/gpu/drm/exynos/exynos_drm_drv.h  | 3 +++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c 
b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 576754d..083e1e3 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -105,7 +105,13 @@ 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->ctx, 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 3a86473..0a956d0 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -178,6 +178,7 @@ struct exynos_drm_display {
  * @remove: cleans up the manager for removal
  * @dpms: control device power.
  * @apply: set timing, vblank and overlay data to registers.
+ * @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.
@@ -194,6 +195,8 @@ struct exynos_drm_manager_ops {
        void (*remove)(void *ctx);
        void (*dpms)(void *ctx, int mode);
        void (*apply)(void *ctx);
+       bool (*mode_fixup)(void *ctx, const struct drm_display_mode *mode,
+                               struct drm_display_mode *adjusted_mode);
        void (*mode_set)(void *ctx, const struct drm_display_mode *mode);
        void (*commit)(void *ctx);
        int (*enable_vblank)(void *ctx);
-- 
1.8.4

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