[PATCH 5.8 067/118] drm/mediatek: Use CPU when fail to get cmdq event

Greg Kroah-Hartman
2020-09-21T16:45:36Z

From: Chun-Kuang Hu <chunkuang.hu@kernel.org>

[ Upstream commit f85acdad07fe36b91f2244263a890bf372528326 ]

Even though cmdq client is created successfully, without the cmdq event,
cmdq could not work correctly, so use CPU when fail to get cmdq event.

Fixes: 60fa8c13ab1a ("drm/mediatek: Move gce event property to mutex device node")
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 7cd8f415fd029..d8b43500f12d1 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -834,13 +834,19 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
drm_crtc_index(&mtk_crtc->base));
mtk_crtc->cmdq_client = NULL;
}
- ret = of_property_read_u32_index(priv->mutex_node,
- "mediatek,gce-events",
- drm_crtc_index(&mtk_crtc->base),
- &mtk_crtc->cmdq_event);
- if (ret)
- dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
- drm_crtc_index(&mtk_crtc->base));
+
+ if (mtk_crtc->cmdq_client) {
+ ret = of_property_read_u32_index(priv->mutex_node,
+ "mediatek,gce-events",
+ drm_crtc_index(&mtk_crtc->base),
+ &mtk_crtc->cmdq_event);
+ if (ret) {
+ dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
+ drm_crtc_index(&mtk_crtc->base));
+ cmdq_mbox_destroy(mtk_crtc->cmdq_client);
+ mtk_crtc->cmdq_client = NULL;
+ }
+ }
#endif
return 0;
}
--
2.25.1