drm/exynos: enable FIMD clocks

Common Clock Framework introduced the need to prepare clocks before
enabling them, otherwise clk_enable() fails. This patch adds clk_prepare_enable
and clk_disable_unprepare() calls to the driver.
This patch also removes clk_disable() from fimd_remove() as it will be done
by pm_runtime_put_sync.

Signed-off-by: Vikas Sajjan <vikas.sajjan@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 5 insertions, 8 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 4073430e22c3..746b282b343a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -801,18 +801,18 @@ static int fimd_clock(struct fimd_context *ctx, bool enable)
         if (enable) {
                 int ret;
 
-                ret = clk_enable(ctx->bus_clk);
+                ret = clk_prepare_enable(ctx->bus_clk);
                 if (ret < 0)
                         return ret;
 
-                ret = clk_enable(ctx->lcd_clk);
+                ret = clk_prepare_enable(ctx->lcd_clk);
                 if  (ret < 0) {
-                        clk_disable(ctx->bus_clk);
+                        clk_disable_unprepare(ctx->bus_clk);
                         return ret;
                 }
         } else {
-                clk_disable(ctx->lcd_clk);
-                clk_disable(ctx->bus_clk);
+                clk_disable_unprepare(ctx->lcd_clk);
+                clk_disable_unprepare(ctx->bus_clk);
         }
 
         return 0;
@@ -996,9 +996,6 @@ static int fimd_remove(struct platform_device *pdev)
         if (ctx->suspended)
                 goto out;
 
-        clk_disable(ctx->lcd_clk);
-        clk_disable(ctx->bus_clk);
-
         pm_runtime_set_suspended(dev);
         pm_runtime_put_sync(dev);