[PATCH v2] drm: mediatek: fix device passed to cmdq

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drm device is now probed from mmsys. We need to use mmsys device to get gce
nodes. Fix following errors:

[    0.740068] mediatek-drm mediatek-drm.1.auto: error -2 can't parse gce-client-reg property (0)
[    0.748721] mediatek-drm mediatek-drm.1.auto: error -2 can't parse gce-client-reg property (0)
...
[    2.659645] mediatek-drm mediatek-drm.1.auto: failed to request channel
[    2.666270] mediatek-drm mediatek-drm.1.auto: failed to request channel

Fixes: 1d367541aded ("soc / drm: mediatek: Fix mediatek-drm device probing")
Signed-off-by: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
Tested-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
---
The patch is based on
https://git.kernel.org/pub/scm/linux/kernel/git/matthias.bgg/linux.git
branch v5.6-next/soc

Change log:
v1->v2:
align with 60fa8c13ab1a ("drm/mediatek: Move gce event property to mutex device node")
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 3 ++-
 drivers/gpu/drm/mediatek/mtk_drm_drv.c  | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 615a54e60fe2..7247c6f87f4a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -822,7 +822,8 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	mtk_crtc->cmdq_client =
-			cmdq_mbox_create(dev, drm_crtc_index(&mtk_crtc->base),
+			cmdq_mbox_create(mtk_crtc->mmsys_dev,
+					 drm_crtc_index(&mtk_crtc->base),
 					 2000);
 	if (IS_ERR(mtk_crtc->cmdq_client)) {
 		dev_dbg(dev, "mtk_crtc %d failed to create mailbox client, writing register by CPU now\n",
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index e2bb0d19ef99..28418e5b83ee 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -517,7 +517,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
 				goto err_node;
 			}
 
-			ret = mtk_ddp_comp_init(dev, node, comp, comp_id, NULL);
+			ret = mtk_ddp_comp_init(dev->parent, node, comp, comp_id, NULL);
 			if (ret) {
 				of_node_put(node);
 				goto err_node;
-- 
2.26.0.292.g33ef6b2f38-goog

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