drm/msm: dpu: Make dpu_plane_sspp_atomic_update() void

All of the checks in dpu_plane_sspp_atomic_update() are impossible, so
remove them and make the function void. This removes the need to error
check in dpu_plane_atomic_update(). Additionally, remove impossible checks
in dpu_plane_atomic_update().

Changes in v2:
- None

Reviewed-by: Jeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 4b12287..c991fbb 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -1194,45 +1194,17 @@ void dpu_plane_set_error(struct drm_plane *plane, bool error)
        pdpu->is_error = error;
 }
 
-static int dpu_plane_sspp_atomic_update(struct drm_plane *plane,
-                               struct drm_plane_state *old_state)
+static void dpu_plane_sspp_atomic_update(struct drm_plane *plane,
+                                        struct drm_plane_state *old_state)
 {
-       uint32_t nplanes, src_flags;
-       struct dpu_plane *pdpu;
-       struct drm_plane_state *state;
-       struct dpu_plane_state *pstate;
-       struct dpu_plane_state *old_pstate;
-       const struct dpu_format *fmt;
-       struct drm_crtc *crtc;
-       struct drm_framebuffer *fb;
-
-       if (!plane) {
-               DPU_ERROR("invalid plane\n");
-               return -EINVAL;
-       } else if (!plane->state) {
-               DPU_ERROR("invalid plane state\n");
-               return -EINVAL;
-       } else if (!old_state) {
-               DPU_ERROR("invalid old state\n");
-               return -EINVAL;
-       }
-
-       pdpu = to_dpu_plane(plane);
-       state = plane->state;
-
-       pstate = to_dpu_plane_state(state);
-
-       old_pstate = to_dpu_plane_state(old_state);
-
-       crtc = state->crtc;
-       fb = state->fb;
-       if (!crtc || !fb) {
-               DPU_ERROR_PLANE(pdpu, "invalid crtc %d or fb %d\n",
-                               crtc != 0, fb != 0);
-               return -EINVAL;
-       }
-       fmt = to_dpu_format(msm_framebuffer_format(fb));
-       nplanes = fmt->num_planes;
+       uint32_t src_flags;
+       struct dpu_plane *pdpu = to_dpu_plane(plane);
+       struct drm_plane_state *state = plane->state;
+       struct dpu_plane_state *pstate = to_dpu_plane_state(state);
+       struct drm_crtc *crtc = state->crtc;
+       struct drm_framebuffer *fb = state->fb;
+       const struct dpu_format *fmt =
+               to_dpu_format(msm_framebuffer_format(fb));
 
        memset(&(pdpu->pipe_cfg), 0, sizeof(struct dpu_hw_pipe_cfg));
 
@@ -1263,7 +1235,7 @@ static int dpu_plane_sspp_atomic_update(struct drm_plane *plane,
        /* override for color fill */
        if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG) {
                /* skip remaining processing on color fill */
-               return 0;
+               return;
        }
 
        if (pdpu->pipe_hw->ops.setup_rects) {
@@ -1334,7 +1306,6 @@ static int dpu_plane_sspp_atomic_update(struct drm_plane *plane,
        }
 
        _dpu_plane_set_qos_remap(plane);
-       return 0;
 }
 
 static void _dpu_plane_atomic_disable(struct drm_plane *plane,
@@ -1373,31 +1344,17 @@ static void _dpu_plane_atomic_disable(struct drm_plane *plane,
 static void dpu_plane_atomic_update(struct drm_plane *plane,
                                struct drm_plane_state *old_state)
 {
-       struct dpu_plane *pdpu;
-       struct drm_plane_state *state;
-
-       if (!plane) {
-               DPU_ERROR("invalid plane\n");
-               return;
-       } else if (!plane->state) {
-               DPU_ERROR("invalid plane state\n");
-               return;
-       }
+       struct dpu_plane *pdpu = to_dpu_plane(plane);
+       struct drm_plane_state *state = plane->state;
 
-       pdpu = to_dpu_plane(plane);
        pdpu->is_error = false;
-       state = plane->state;
 
        DPU_DEBUG_PLANE(pdpu, "\n");
 
        if (!state->visible) {
                _dpu_plane_atomic_disable(plane, old_state);
        } else {
-               int ret;
-
-               ret = dpu_plane_sspp_atomic_update(plane, old_state);
-               /* atomic_check should have ensured that this doesn't fail */
-               WARN_ON(ret < 0);
+               dpu_plane_sspp_atomic_update(plane, old_state);
        }
 }