Hi Sascha,
On 1/19/23 16:17, Sascha Hauer wrote:
> Hi Michael,
>
> On Thu, Jan 19, 2023 at 03:39:10PM +0100, Michael Riesch wrote:
>> The Rockchip VOP2 features an internal RGB output block, which can be
>> attached to the video port 2 of the VOP2. Add support for this output
>> block.
>>
>> Signed-off-by: Michael Riesch <michael.riesch@xxxxxxxxxxxxxx>
>> ---
>> v2:
>> - move away from wrong assumption that the RGB block is always
>> connected to video port 2 -> check devicetree to find RGB block
>
> Traces of that assumption are still in the commmit message.
Oops, this needs fixing of course...
>> drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 44 ++++++++++++++++++++
>> 1 file changed, 44 insertions(+)
>>
>> +static int vop2_find_rgb_encoder(struct vop2 *vop2)
>> +{
>> + struct device_node *node = vop2->dev->of_node;
>> + struct device_node *endpoint;
>> + int i;
>> +
>> + for (i = 0; i < vop2->data->nr_vps; i++) {
>> + endpoint = of_graph_get_endpoint_by_regs(node, i,
>> + ROCKCHIP_VOP2_EP_RGB0);
>> + if (!endpoint)
>> + continue;
>> +
>> + of_node_put(endpoint);
>> + return i;
>> + }
>> +
>> + return -ENOENT;
>> +}
>> +
>> static struct reg_field vop2_cluster_regs[VOP2_WIN_MAX_REG] = {
>> [VOP2_WIN_ENABLE] = REG_FIELD(RK3568_CLUSTER_WIN_CTRL0, 0, 0),
>> [VOP2_WIN_FORMAT] = REG_FIELD(RK3568_CLUSTER_WIN_CTRL0, 1, 5),
>> @@ -2698,11 +2721,29 @@ static int vop2_bind(struct device *dev, struct device *master, void *data)
>> if (ret)
>> return ret;
>>
>> + ret = vop2_find_rgb_encoder(vop2);
>> + if (ret > 0) {
>
> '0' seems to be a valid vp as well. Shouldn't this be ret >= 0?
...and you are right of course. What a stupid mistake.
Will fix these in v3.
Best regards,
Michael
>
>> + vop2->rgb = rockchip_rgb_init(dev, &vop2->vps[ret].crtc,
>> + vop2->drm, ret);
>> + if (IS_ERR(vop2->rgb)) {
>> + if (PTR_ERR(vop2->rgb) == -EPROBE_DEFER) {
>> + ret = PTR_ERR(vop2->rgb);
>> + goto err_crtcs;
>> + }
>> + vop2->rgb = NULL;
>> + }
>> + }
>> +
>
> Sascha
>
