drm/exynos: remove chained calls to enable

With atomic modesetting all the control for CRTC, Planes, Encoders and
Connectors should come from DRM core, so the driver is not allowed to
enable or disable planes from inside the crtc_enable()/disable() call.

But it needs to disable planes with crtc_disable in exynos driver
internally. Because crtc is disabled before plane is disabled, it means
plane_disable just returns without any register changes, then we cannot
be sure setting register to disable plane when crtc is disable.

This patch removes this chainned calls to enable plane from exynos hw
drivers code letting only DRM core touch planes except to disable plane.
Also it leads eliminable enabled and resume of struct exynos_drm_plane.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 4 insertions, 34 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 24f0c22ff495..f57068781a37 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -937,8 +937,6 @@ static void mixer_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
 		vp_video_buffer(mixer_ctx, win);
 	else
 		mixer_graph_buffer(mixer_ctx, win);
-
-	mixer_ctx->planes[win].enabled = true;
 }
 
 static void mixer_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
@@ -952,7 +950,6 @@ static void mixer_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
 	mutex_lock(&mixer_ctx->mixer_mutex);
 	if (!mixer_ctx->powered) {
 		mutex_unlock(&mixer_ctx->mixer_mutex);
-		mixer_ctx->planes[win].resume = false;
 		return;
 	}
 	mutex_unlock(&mixer_ctx->mixer_mutex);
@@ -964,8 +961,6 @@ static void mixer_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
 
 	mixer_vsync_set_update(mixer_ctx, true);
 	spin_unlock_irqrestore(&res->reg_slock, flags);
-
-	mixer_ctx->planes[win].enabled = false;
 }
 
 static void mixer_wait_for_vblank(struct exynos_drm_crtc *crtc)
@@ -1000,32 +995,6 @@ static void mixer_wait_for_vblank(struct exynos_drm_crtc *crtc)
 	drm_vblank_put(mixer_ctx->drm_dev, mixer_ctx->pipe);
 }
 
-static void mixer_window_suspend(struct mixer_context *ctx)
-{
-	struct exynos_drm_plane *plane;
-	int i;
-
-	for (i = 0; i < MIXER_WIN_NR; i++) {
-		plane = &ctx->planes[i];
-		plane->resume = plane->enabled;
-		mixer_win_disable(ctx->crtc, i);
-	}
-}
-
-static void mixer_window_resume(struct mixer_context *ctx)
-{
-	struct exynos_drm_plane *plane;
-	int i;
-
-	for (i = 0; i < MIXER_WIN_NR; i++) {
-		plane = &ctx->planes[i];
-		plane->enabled = plane->resume;
-		plane->resume = false;
-		if (plane->enabled)
-			mixer_win_commit(ctx->crtc, i);
-	}
-}
-
 static void mixer_enable(struct exynos_drm_crtc *crtc)
 {
 	struct mixer_context *ctx = crtc->ctx;
@@ -1078,14 +1047,13 @@ static void mixer_enable(struct exynos_drm_crtc *crtc)
 
 	mixer_reg_write(res, MXR_INT_EN, ctx->int_en);
 	mixer_win_reset(ctx);
-
-	mixer_window_resume(ctx);
 }
 
 static void mixer_disable(struct exynos_drm_crtc *crtc)
 {
 	struct mixer_context *ctx = crtc->ctx;
 	struct mixer_resources *res = &ctx->mixer_res;
+	int i;
 
 	mutex_lock(&ctx->mixer_mutex);
 	if (!ctx->powered) {
@@ -1096,7 +1064,9 @@ static void mixer_disable(struct exynos_drm_crtc *crtc)
 
 	mixer_stop(ctx);
 	mixer_regs_dump(ctx);
-	mixer_window_suspend(ctx);
+
+	for (i = 0; i < MIXER_WIN_NR; i++)
+		mixer_win_disable(crtc, i);
 
 	ctx->int_en = mixer_reg_read(res, MXR_INT_EN);