Messages in this thread | | | Subject | Re: [PATCH v4 3/3] media: mtk-mdp: Fix mdp device tree | From | Matthias Brugger <> | Date | Wed, 7 Jun 2017 10:44:58 +0200 |
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Hi Hans, hi Mauro,
On 23/05/17 05:24, Minghsiu Tsai wrote: > From: Daniel Kurtz <djkurtz@chromium.org> > > If the mdp_* nodes are under an mdp sub-node, their corresponding > platform device does not automatically get its iommu assigned properly. > > Fix this by moving the mdp component nodes up a level such that they are > siblings of mdp and all other SoC subsystems. This also simplifies the > device tree. > > Although it fixes iommu assignment issue, it also break compatibility > with old device tree. So, the patch in driver is needed to iterate over > sibling mdp device nodes, not child ones, to keep driver work properly. > > Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> > Signed-off-by: Minghsiu Tsai <minghsiu.tsai@mediatek.com> > Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com> >
Are you OK to take this patch, or do you have any further comments?
Regards, Matthias
> --- > drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 12 ++++++++++-- > 1 file changed, 10 insertions(+), 2 deletions(-) > > diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c > index 9e4eb7d..8134755 100644 > --- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c > +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c > @@ -103,7 +103,7 @@ static int mtk_mdp_probe(struct platform_device *pdev) > { > struct mtk_mdp_dev *mdp; > struct device *dev = &pdev->dev; > - struct device_node *node; > + struct device_node *node, *parent; > int i, ret = 0; > > mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL); > @@ -117,8 +117,16 @@ static int mtk_mdp_probe(struct platform_device *pdev) > mutex_init(&mdp->lock); > mutex_init(&mdp->vpulock); > > + /* Old dts had the components as child nodes */ > + if (of_get_next_child(dev->of_node, NULL)) { > + parent = dev->of_node; > + dev_warn(dev, "device tree is out of date\n"); > + } else { > + parent = dev->of_node->parent; > + } > + > /* Iterate over sibling MDP function blocks */ > - for_each_child_of_node(dev->of_node, node) { > + for_each_child_of_node(parent, node) { > const struct of_device_id *of_id; > enum mtk_mdp_comp_type comp_type; > int comp_id; >
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