Re: [PATCH v2 13/13] drm/mediatek: config component output by device node port

CK Hu
2018-09-06T06:03:22Z

Hi, Bibby:

On Wed, 2018-09-05 at 16:31 +0800, Bibby Hsieh wrote:
> We can select output component by decive node port.
> Main path default output component is DSI.
> External path default output component is DPI.
>
> Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 37 ++++++++++++++++++++++++++++++----
> drivers/gpu/drm/mediatek/mtk_drm_drv.h | 4 ++--
> 2 files changed, 35 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index d961112fa2f5..a477fb878c06 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -21,7 +21,9 @@
> #include <drm/drm_of.h>
> #include <linux/component.h>
> #include <linux/iommu.h>
> +#include <linux/of.h>
> #include <linux/of_address.h>
> +#include <linux/of_graph.h>
> #include <linux/of_platform.h>
> #include <linux/pm_runtime.h>
>
> @@ -133,7 +135,7 @@ static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
> .atomic_commit = mtk_atomic_commit,
> };
>
> -static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
> +static enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
> DDP_COMPONENT_OVL0,
> DDP_COMPONENT_RDMA0,
> DDP_COMPONENT_COLOR0,
> @@ -141,7 +143,7 @@ static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
> DDP_COMPONENT_DSI0,
> };
>
> -static const enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
> +static enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
> DDP_COMPONENT_RDMA1,
> DDP_COMPONENT_DPI0,
> };
> @@ -172,7 +174,7 @@ static const enum mtk_ddp_comp_id mt2712_mtk_ddp_third[] = {
> DDP_COMPONENT_PWM2,
> };
>
> -static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
> +static enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
> DDP_COMPONENT_OVL0,
> DDP_COMPONENT_COLOR0,
> DDP_COMPONENT_AAL0,
> @@ -183,7 +185,7 @@ static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
> DDP_COMPONENT_PWM0,
> };
>
> -static const enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
> +static enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
> DDP_COMPONENT_OVL1,
> DDP_COMPONENT_COLOR1,
> DDP_COMPONENT_GAMMA,
> @@ -472,6 +474,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
>
> /* Iterate over sibling DISP function blocks */
> for_each_child_of_node(dev->of_node->parent, node) {
> + struct device_node *port, *ep, *remote;
> const struct of_device_id *of_id;
> enum mtk_ddp_comp_type comp_type;
> int comp_id;
> @@ -531,6 +534,32 @@ static int mtk_drm_probe(struct platform_device *pdev)
>
> private->ddp_comp[comp_id] = comp;
> }
> +
> + if (comp_type != MTK_DSI && comp_type != MTK_DPI) {
> + port = of_graph_get_port_by_id(node, 0);
> + if (!port)
> + continue;
> + ep = of_get_child_by_name(port, "endpoint");
> + of_node_put(port);
> + if (!ep)
> + continue;
> + remote = of_graph_get_remote_port_parent(ep);
> + of_node_put(ep);
> + if (!remote)
> + continue;
> + of_id = of_match_node(mtk_ddp_comp_dt_ids, remote);
> + if (!of_id)
> + continue;
> + comp_type = (enum mtk_ddp_comp_type)of_id->data;
> + for (i = 0; i < private->data->main_len - 1; i++)
> + if (private->data->main_path[i] == comp_id)
> + private->data->main_path[i + 1] =
> + mtk_ddp_comp_get_id(node, comp_type);
> + for (i = 0; i < private->data->ext_len - 1; i++)
> + if (private->data->ext_path[i] == comp_id)
> + private->data->ext_path[i + 1] =
> + mtk_ddp_comp_get_id(node, comp_type);
> + }

I think you should add description in binding document
(Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt)
for this. After the binding document is fully reviewed, we could start
to review this patch.

Regards,
CK

> }
>
> if (!private->mutex_node) {
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> index ecc00ca3221d..256a3ff2e66e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -29,9 +29,9 @@ struct drm_property;
> struct regmap;
>
> struct mtk_mmsys_driver_data {
> - const enum mtk_ddp_comp_id *main_path;
> + enum mtk_ddp_comp_id *main_path;
> unsigned int main_len;
> - const enum mtk_ddp_comp_id *ext_path;
> + enum mtk_ddp_comp_id *ext_path;
> unsigned int ext_len;
> const enum mtk_ddp_comp_id *third_path;
> unsigned int third_len;

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