[PATCH v10 15/24] drm/mediatek: Remove ineffectual power management codes

[Hsiao Chien Sung]

Display modules will be powered on when .atomic_enable(),
there is no need to do it again in mtk_crtc_ddp_hw_init().
Besides, the DRM devices are created manually when mtk-mmsys
is probed and there is no power domain linked to it.

Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")

Signed-off-by: Hsiao Chien Sung <shawn.sung at mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 18 +++---------------
 1 file changed, 3 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index bc4cc75cca18..c7edd80be428 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -6,7 +6,6 @@
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/mailbox_controller.h>
-#include <linux/pm_runtime.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 #include <linux/soc/mediatek/mtk-mmsys.h>
 #include <linux/soc/mediatek/mtk-mutex.h>
@@ -362,22 +361,16 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc, struct drm_atomic
 		drm_connector_list_iter_end(&conn_iter);
 	}
 
-	ret = pm_runtime_resume_and_get(crtc->dev->dev);
-	if (ret < 0) {
-		DRM_ERROR("Failed to enable power domain: %d\n", ret);
-		return ret;
-	}
-
 	ret = mtk_mutex_prepare(mtk_crtc->mutex);
 	if (ret < 0) {
 		DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
-		goto err_pm_runtime_put;
+		goto error;
 	}
 
 	ret = mtk_crtc_ddp_clk_enable(mtk_crtc);
 	if (ret < 0) {
 		DRM_ERROR("Failed to enable component clocks: %d\n", ret);
-		goto err_mutex_unprepare;
+		goto error;
 	}
 
 	for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
@@ -426,16 +419,13 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc, struct drm_atomic
 
 	return 0;
 
-err_mutex_unprepare:
+error:
 	mtk_mutex_unprepare(mtk_crtc->mutex);
-err_pm_runtime_put:
-	pm_runtime_put(crtc->dev->dev);
 	return ret;
 }
 
 static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
 {
-	struct drm_device *drm = mtk_crtc->base.dev;
 	struct drm_crtc *crtc = &mtk_crtc->base;
 	int i;
 
@@ -465,8 +455,6 @@ static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
 	mtk_crtc_ddp_clk_disable(mtk_crtc);
 	mtk_mutex_unprepare(mtk_crtc->mutex);
 
-	pm_runtime_put(drm->dev);
-
 	if (crtc->state->event && !crtc->state->active) {
 		spin_lock_irq(&crtc->dev->event_lock);
 		drm_crtc_send_vblank_event(crtc, crtc->state->event);
-- 
2.18.0