drm/tegra/dc: Use drm_mode_get_hv_timing() to populate plane clip rectangle

Use drm_mode_get_hv_timing() to fill out the plane clip rectangle.

No functional changes as the code already uses crtc_state->mode
to populate the clip, which is also what drm_mode_get_hv_timing()
uses.

Once everyone agrees on this we can move the clip handling into
drm_atomic_helper_check_plane_state().

v2: Rebase due to tegra_plane_state_add() relocating to plane.c

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171123190502.28449-13-ville.syrjala@linux.intel.com

diff --git a/drivers/gpu/drm/tegra/plane.c b/drivers/gpu/drm/tegra/plane.c
index 36a06a9..7267a01 100644 (file)
--- a/drivers/gpu/drm/tegra/plane.c
+++ b/drivers/gpu/drm/tegra/plane.c
@@ -82,7 +82,7 @@ int tegra_plane_state_add(struct tegra_plane *plane,
 {
        struct drm_crtc_state *crtc_state;
        struct tegra_dc_state *tegra;
-       struct drm_rect clip;
+       struct drm_rect clip = {};
        int err;
 
        /* Propagate errors from allocation or locking failures. */
@@ -90,10 +90,9 @@ int tegra_plane_state_add(struct tegra_plane *plane,
        if (IS_ERR(crtc_state))
                return PTR_ERR(crtc_state);
 
-       clip.x1 = 0;
-       clip.y1 = 0;
-       clip.x2 = crtc_state->mode.hdisplay;
-       clip.y2 = crtc_state->mode.vdisplay;
+       if (crtc_state->enable)
+               drm_mode_get_hv_timing(&crtc_state->mode,
+                                      &clip.x2, &clip.y2);
 
        /* Check plane state for visibility and calculate clipping bounds */
        err = drm_atomic_helper_check_plane_state(state, crtc_state, &clip,