[PATCH v5 03/12] drm/exynos: atomic phase 1: add .mode_set_nofb() callback

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>

The new atomic infrastructure needs the .mode_set_nofb() callback to
update CRTC timings before setting any plane.

Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c | 60 +++++---------------------------
 1 file changed, 9 insertions(+), 51 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c 
b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 1c0d936..35f101f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -81,59 +81,16 @@ exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
        return true;
 }

-static int
-exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
-                         struct drm_display_mode *adjusted_mode, int x, int y,
-                         struct drm_framebuffer *old_fb)
-{
-       struct drm_framebuffer *fb = crtc->primary->fb;
-       unsigned int crtc_w;
-       unsigned int crtc_h;
-       int ret;
-
-       /*
-        * copy the mode data adjusted by mode_fixup() into crtc->mode
-        * so that hardware can be seet to proper mode.
-        */
-       memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
-
-       ret = exynos_check_plane(crtc->primary, fb);
-       if (ret < 0)
-               return ret;
-
-       crtc_w = fb->width - x;
-       crtc_h = fb->height - y;
-       exynos_plane_mode_set(crtc->primary, crtc, fb, 0, 0,
-                             crtc_w, crtc_h, x, y, crtc_w, crtc_h);
-
-       return 0;
-}
-
-static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
-                                         struct drm_framebuffer *old_fb)
+static void
+exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 {
        struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
-       struct drm_framebuffer *fb = crtc->primary->fb;
-       unsigned int crtc_w;
-       unsigned int crtc_h;
-       int ret;

-       /* when framebuffer changing is requested, crtc's dpms should be on */
-       if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
-               DRM_ERROR("failed framebuffer changing request.\n");
-               return -EPERM;
-       }
-
-       ret = exynos_check_plane(crtc->primary, fb);
-       if (ret)
-               return ret;
-
-       crtc_w = fb->width - x;
-       crtc_h = fb->height - y;
-       exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
-                           crtc_w, crtc_h, x, y, crtc_w, crtc_h);
+       if (WARN_ON(!crtc->state))
+               return;

-       return 0;
+       if (exynos_crtc->ops->commit)
+               exynos_crtc->ops->commit(exynos_crtc);
 }

 static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
@@ -158,8 +115,9 @@ static struct drm_crtc_helper_funcs 
exynos_crtc_helper_funcs = {
        .prepare        = exynos_drm_crtc_prepare,
        .commit         = exynos_drm_crtc_commit,
        .mode_fixup     = exynos_drm_crtc_mode_fixup,
-       .mode_set       = exynos_drm_crtc_mode_set,
-       .mode_set_base  = exynos_drm_crtc_mode_set_base,
+       .mode_set       = drm_helper_crtc_mode_set,
+       .mode_set_nofb  = exynos_drm_crtc_mode_set_nofb,
+       .mode_set_base  = drm_helper_crtc_mode_set_base,
        .disable        = exynos_drm_crtc_disable,
 };

-- 
2.1.0