[PATCH 08/10] drm/mediatek: mtk_dsi: Enable PM Runtime on probe

[AngeloGioacchino Del Regno]

Enable PM Runtime at the end of mtk_dsi_probe() so that the
mediatek-drm mtk_ddp_comp_power_on() function is able to do
pm_runtime_resume_and_get() and, analogously, the function
mtk_ddp_comp_power_off() to pm_runtime_put() for the DSI
device.

This makes sure that the power domains for the DSI IP are
turned on and off when necessary.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index fc6f846208d6..9e4e4152090e 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -1677,6 +1677,10 @@ static int mtk_dsi_probe(struct platform_device *pdev)
 	dsi->bridge.of_node = dev->of_node;
 	dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
 
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 
-- 
2.54.0