[media] exynos-gsc: Make driver functional when CONFIG_PM is unset

The driver depended on CONFIG_PM to be functional. Let's remove that
dependency, by enable the runtime PM resourses during ->probe() and
update the device's runtime PM status to reflect this.

[mszyprow: rebased onto v4.9-rc4]

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c
index 945042c..7539bb3 100644 (file)
--- a/drivers/media/platform/exynos-gsc/gsc-core.c
+++ b/drivers/media/platform/exynos-gsc/gsc-core.c
@@ -1085,7 +1085,7 @@ static int gsc_probe(struct platform_device *pdev)
                return PTR_ERR(gsc->clock);
        }
 
-       ret = clk_prepare(gsc->clock);
+       ret = clk_prepare_enable(gsc->clock);
        if (ret) {
                dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
                        GSC_CLOCK_GATE_NAME);
@@ -1108,24 +1108,23 @@ static int gsc_probe(struct platform_device *pdev)
                goto err_v4l2;
 
        platform_set_drvdata(pdev, gsc);
-       pm_runtime_enable(dev);
-       ret = pm_runtime_get_sync(&pdev->dev);
-       if (ret < 0)
-               goto err_m2m;
+
+       gsc_hw_set_sw_reset(gsc);
+       gsc_wait_reset(gsc);
 
        vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
 
        dev_dbg(dev, "gsc-%d registered successfully\n", gsc->id);
 
-       pm_runtime_put(dev);
+       pm_runtime_set_active(dev);
+       pm_runtime_enable(dev);
+
        return 0;
 
-err_m2m:
-       gsc_unregister_m2m_device(gsc);
 err_v4l2:
        v4l2_device_unregister(&gsc->v4l2_dev);
 err_clk:
-       clk_unprepare(gsc->clock);
+       clk_disable_unprepare(gsc->clock);
        return ret;
 }