[PATCH v2 07/11] drm/exynos: add mode_fixup callback to exynos_drm_crtc_ops

[Andrzej Hajda]

crtc::mode_fixup callback is required by crtcs which internally use
a different mode than requested by user - case of Exynos Mixer.

Signed-off-by: Andrzej Hajda <a.ha...@samsung.com>
Reviewed-by: Tobias Jakobi <tjak...@math.uni-bielefeld.de>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c | 15 +++++++++++++++
 drivers/gpu/drm/exynos/exynos_drm_drv.h  |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c 
b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 6ce0821590df..dc01342e759a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -95,8 +95,23 @@ static enum drm_mode_status exynos_crtc_mode_valid(struct 
drm_crtc *crtc,
        return MODE_OK;
 }
 
+static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
+               const struct drm_display_mode *mode,
+               struct drm_display_mode *adjusted_mode)
+{
+       struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+
+       if (exynos_crtc->ops->mode_fixup)
+               return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
+                               adjusted_mode);
+
+       return true;
+}
+
+
 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
        .mode_valid     = exynos_crtc_mode_valid,
+       .mode_fixup     = exynos_crtc_mode_fixup,
        .atomic_check   = exynos_crtc_atomic_check,
        .atomic_begin   = exynos_crtc_atomic_begin,
        .atomic_flush   = exynos_crtc_atomic_flush,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h 
b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index cf131c2aa23e..e8bcc7223016 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -136,6 +136,9 @@ struct exynos_drm_crtc_ops {
        u32 (*get_vblank_counter)(struct exynos_drm_crtc *crtc);
        enum drm_mode_status (*mode_valid)(struct exynos_drm_crtc *crtc,
                const struct drm_display_mode *mode);
+       bool (*mode_fixup)(struct exynos_drm_crtc *crtc,
+                          const struct drm_display_mode *mode,
+                          struct drm_display_mode *adjusted_mode);
        int (*atomic_check)(struct exynos_drm_crtc *crtc,
                            struct drm_crtc_state *state);
        void (*atomic_begin)(struct exynos_drm_crtc *crtc);
-- 
2.14.1

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