drm/exynos: added pm support.

this patch adds pm feature for fimd driver.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index fe4172e48ad2..95c621018443 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -181,6 +181,9 @@ static void fimd_commit(struct device *dev)
         struct fb_videomode *timing = ctx->timing;
         u32 val;
 
+        if (ctx->suspended)
+                return;
+
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
         /* setup polarity values from machine code. */
@@ -414,6 +417,9 @@ static void fimd_win_commit(struct device *dev, int zpos)
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
+        if (ctx->suspended)
+                return;
+
         if (win == DEFAULT_ZPOS)
                 win = ctx->default_win;
 
@@ -885,6 +891,51 @@ out:
         return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int fimd_suspend(struct device *dev)
+{
+        struct fimd_context *ctx = get_fimd_context(dev);
+        int ret;
+
+        if (pm_runtime_suspended(dev))
+                return 0;
+
+        ret = pm_runtime_suspend(dev);
+        if (ret < 0)
+                return ret;
+
+        ctx->suspended = true;
+        return 0;
+}
+
+static int fimd_resume(struct device *dev)
+{
+        struct fimd_context *ctx = get_fimd_context(dev);
+        int ret;
+
+        ret = pm_runtime_resume(dev);
+        if (ret < 0) {
+                DRM_ERROR("failed to resume runtime pm.\n");
+                return ret;
+        }
+
+        pm_runtime_disable(dev);
+
+        ret = pm_runtime_set_active(dev);
+        if (ret < 0) {
+                DRM_ERROR("failed to active runtime pm.\n");
+                pm_runtime_enable(dev);
+                pm_runtime_suspend(dev);
+                return ret;
+        }
+
+        pm_runtime_enable(dev);
+
+        ctx->suspended = false;
+        return 0;
+}
+#endif
+
 #ifdef CONFIG_PM_RUNTIME
 static int fimd_runtime_suspend(struct device *dev)
 {
@@ -917,11 +968,19 @@ static int fimd_runtime_resume(struct device *dev)
         }
 
         ctx->suspended = false;
+
+        /* if vblank was enabled status, enable it again. */
+        if (test_and_clear_bit(0, &ctx->irq_flags))
+                fimd_enable_vblank(dev);
+
+        fimd_apply(dev);
+
         return 0;
 }
 #endif
 
 static const struct dev_pm_ops fimd_pm_ops = {
+        SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume)
         SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL)
 };