From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>
Let pm_runtime handle the enabling/disabling of the device with proper
refcnt instead of rely on specific flags to track the enabled state.
Chnagelog v3:
- Revive suspended varable to check the suspend status.
Changelog v2:
- Remove unnecessary changes which removed commit callback from decon drivers
and modify CONFIG_PM_SLEEP -> CONFIG_PM
Signed-off-by: Gustavo Padovan <gustavo.pado...@collabora.co.uk>
Signed-off-by: Inki Dae <inki....@samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_fimd.c | 54 ++++++++++++++++++++++----------
1 file changed, 37 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index bd75c15..2c38323 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -745,7 +745,6 @@ static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
static void fimd_enable(struct exynos_drm_crtc *crtc)
{
struct fimd_context *ctx = crtc->ctx;
- int ret;
if (!ctx->suspended)
return;
@@ -754,18 +753,6 @@ static void fimd_enable(struct exynos_drm_crtc *crtc)
pm_runtime_get_sync(ctx->dev);
- ret = clk_prepare_enable(ctx->bus_clk);
- if (ret < 0) {
- DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
- return;
- }
-
- ret = clk_prepare_enable(ctx->lcd_clk);
- if (ret < 0) {
- DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
- return;
- }
-
/* if vblank was enabled status, enable it again. */
if (test_and_clear_bit(0, &ctx->irq_flags))
fimd_enable_vblank(ctx->crtc);
@@ -795,11 +782,7 @@ static void fimd_disable(struct exynos_drm_crtc *crtc)
writel(0, ctx->regs + VIDCON0);
- clk_disable_unprepare(ctx->lcd_clk);
- clk_disable_unprepare(ctx->bus_clk);
-
pm_runtime_put_sync(ctx->dev);
-
ctx->suspended = true;
}
@@ -1121,12 +1104,49 @@ static int fimd_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int exynos_fimd_suspend(struct device *dev)
+{
+ struct fimd_context *ctx = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(ctx->lcd_clk);
+ clk_disable_unprepare(ctx->bus_clk);
+
+ return 0;
+}
+
+static int exynos_fimd_resume(struct device *dev)
+{
+ struct fimd_context *ctx = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(ctx->bus_clk);
+ if (ret < 0) {
+ DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(ctx->lcd_clk);
+ if (ret < 0) {
+ DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops exynos_fimd_pm_ops = {
+ SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
+};
+
struct platform_driver fimd_driver = {
.probe = fimd_probe,
.remove = fimd_remove,
.driver = {
.name = "exynos4-fb",
.owner = THIS_MODULE,
+ .pm = &exynos_fimd_pm_ops,
.of_match_table = fimd_driver_dt_match,
},
};
--
1.9.1
--
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