[PATCH 6.1.y 1/3] drm/exynos: exynos7_drm_decon: fix uninitialized crtc reference in functions

[Sasha Levin <sashal@kernel.org>]

From: Kaustabh Chakraborty <kauschluss@disroot.org>

[ Upstream commit d31bbacf783daf1e71fbe5c68df93550c446bf44 ]

Modify the functions to accept a pointer to struct decon_context
instead.

Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Stable-dep-of: e1361a4f1be9 ("drm/exynos: exynos7_drm_decon: remove ctx->suspended")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/exynos/exynos7_drm_decon.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
index e52f72cc000e2..6d18a20e1104d 100644
--- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
@@ -82,10 +82,8 @@ static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
 	DRM_PLANE_TYPE_CURSOR,
 };
 
-static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
+static void decon_wait_for_vblank(struct decon_context *ctx)
 {
-	struct decon_context *ctx = crtc->ctx;
-
 	if (ctx->suspended)
 		return;
 
@@ -101,9 +99,8 @@ static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
 		DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
 }
 
-static void decon_clear_channels(struct exynos_drm_crtc *crtc)
+static void decon_clear_channels(struct decon_context *ctx)
 {
-	struct decon_context *ctx = crtc->ctx;
 	unsigned int win, ch_enabled = 0;
 
 	/* Check if any channel is enabled. */
@@ -119,7 +116,7 @@ static void decon_clear_channels(struct exynos_drm_crtc *crtc)
 
 	/* Wait for vsync, as disable channel takes effect at next vsync */
 	if (ch_enabled)
-		decon_wait_for_vblank(ctx->crtc);
+		decon_wait_for_vblank(ctx);
 }
 
 static int decon_ctx_initialize(struct decon_context *ctx,
@@ -127,7 +124,7 @@ static int decon_ctx_initialize(struct decon_context *ctx,
 {
 	ctx->drm_dev = drm_dev;
 
-	decon_clear_channels(ctx->crtc);
+	decon_clear_channels(ctx);
 
 	return exynos_drm_register_dma(drm_dev, ctx->dev, &ctx->dma_priv);
 }
-- 
2.51.0