Hi Laurent,
What a nice driver! A few minor comments below:
On Wed, Jul 17, 2013 at 04:54:42PM +0200, Laurent Pinchart wrote:
...
> +static void vsp1_device_init(struct vsp1_device *vsp1)
> +{
> + unsigned int i;
> + u32 status;
> +
> + /* Reset any channel that might be running. */
> + status = vsp1_read(vsp1, VI6_STATUS);
> +
> + for (i = 0; i < VPS1_MAX_WPF; ++i) {
> + unsigned int timeout;
> +
> + if (!(status & VI6_STATUS_SYS_ACT(i)))
> + continue;
> +
> + vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(i));
> + for (timeout = 10; timeout > 0; --timeout) {
> + status = vsp1_read(vsp1, VI6_STATUS);
> + if (!(status & VI6_STATUS_SYS_ACT(i)))
> + break;
> +
> + usleep_range(1000, 2000);
> + }
> +
> + if (timeout)
> + dev_err(vsp1->dev, "failed to reset wpf.%u\n", i);
Have you seen this happening in practice? Do you expect the device to
function if resetting it fails?
> + }
> +
> + vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) |
> + (8 << VI6_CLK_DCSWT_CSTRW_SHIFT));
> +
> + for (i = 0; i < VPS1_MAX_RPF; ++i)
> + vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);
> +
> + for (i = 0; i < VPS1_MAX_UDS; ++i)
> + vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED);
> +
> + vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED);
> + vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED);
> + vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED);
> + vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED);
> + vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED);
> + vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED);
> +
> + vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
> + (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
> + vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
> + (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
> +}
...
> +int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
> + unsigned int num_pads)
> +{
> + static const struct {
> + unsigned int id;
> + unsigned int reg;
> + } routes[] = {
> + { VI6_DPR_NODE_LIF, 0 },
> + { VI6_DPR_NODE_RPF(0), VI6_DPR_RPF_ROUTE(0) },
> + { VI6_DPR_NODE_RPF(1), VI6_DPR_RPF_ROUTE(1) },
> + { VI6_DPR_NODE_RPF(2), VI6_DPR_RPF_ROUTE(2) },
> + { VI6_DPR_NODE_RPF(3), VI6_DPR_RPF_ROUTE(3) },
> + { VI6_DPR_NODE_RPF(4), VI6_DPR_RPF_ROUTE(4) },
> + { VI6_DPR_NODE_UDS(0), VI6_DPR_UDS_ROUTE(0) },
> + { VI6_DPR_NODE_UDS(1), VI6_DPR_UDS_ROUTE(1) },
> + { VI6_DPR_NODE_UDS(2), VI6_DPR_UDS_ROUTE(2) },
> + { VI6_DPR_NODE_WPF(0), 0 },
> + { VI6_DPR_NODE_WPF(1), 0 },
> + { VI6_DPR_NODE_WPF(2), 0 },
> + { VI6_DPR_NODE_WPF(3), 0 },
> + };
> +
> + unsigned int i;
> + int ret;
> +
> + for (i = 0; i < ARRAY_SIZE(routes); ++i) {
> + if (routes[i].id == entity->id) {
> + entity->route = routes[i].reg;
> + break;
> + }
> + }
> +
> + if (i == ARRAY_SIZE(routes))
> + return -EINVAL;
> +
> + entity->vsp1 = vsp1;
> + entity->source_pad = num_pads - 1;
> +
> + /* Allocate formats and pads. */
> + entity->formats = devm_kzalloc(vsp1->dev,
> + num_pads * sizeof(*entity->formats),
> + GFP_KERNEL);
> + if (entity->formats == NULL)
> + return -ENOMEM;
> +
> + entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
> + GFP_KERNEL);
> + if (entity->pads == NULL)
> + return -ENOMEM;
> +
> + /* Initialize pads. */
> + for (i = 0; i < num_pads - 1; ++i)
> + entity->pads[i].flags = MEDIA_PAD_FL_SINK;
> +
> + entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
> +
> + /* Initialize the media entity. */
> + ret = media_entity_init(&entity->subdev.entity, num_pads,
> + entity->pads, 0);
How about return media_entity_init(...) instead?
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
...
> +static int lif_enum_mbus_code(struct v4l2_subdev *subdev,
> + struct v4l2_subdev_fh *fh,
> + struct v4l2_subdev_mbus_code_enum *code)
> +{
> + static const unsigned int codes[] = {
> + V4L2_MBUS_FMT_ARGB8888_1X32,
> + V4L2_MBUS_FMT_AYUV8_1X32,
> + };
> + struct v4l2_mbus_framefmt *format;
> +
> + if (code->pad == LIF_PAD_SINK) {
> + if (code->index >= ARRAY_SIZE(codes))
> + return -EINVAL;
> +
> + code->code = codes[code->index];
> + } else {
> + /* The LIF can't perform format conversion, the sink format is
> + * always identical to the source format.
> + */
> + if (code->index)
> + return -EINVAL;
> +
> + format = v4l2_subdev_get_try_format(fh, LIF_PAD_SINK);
> + code->code = format->code;
You don't really need "format". If you want to use it however you could
define it inside the parentheses.
> + }
> +
> + return 0;
> +}
...
> +static int uds_enum_mbus_code(struct v4l2_subdev *subdev,
> + struct v4l2_subdev_fh *fh,
> + struct v4l2_subdev_mbus_code_enum *code)
> +{
> + static const unsigned int codes[] = {
> + V4L2_MBUS_FMT_ARGB8888_1X32,
> + V4L2_MBUS_FMT_AYUV8_1X32,
> + };
> + struct v4l2_mbus_framefmt *format;
> +
> + if (code->pad == UDS_PAD_SINK) {
> + if (code->index >= ARRAY_SIZE(codes))
> + return -EINVAL;
> +
> + code->code = codes[code->index];
> + } else {
> + /* The UDS can't perform format conversion, the sink format is
> + * always identical to the source format.
> + */
> + if (code->index)
> + return -EINVAL;
> +
> + format = v4l2_subdev_get_try_format(fh, UDS_PAD_SINK);
> + code->code = format->code;
Same here.
> + }
> +
> + return 0;
> +}
...
> + /* Follow links downstream for each input and make sure the graph
> + * contains no loop and that all branches end at the output WPF.
> + */
I wonder if checking for loops should be done already in pipeline validation
done by the framework. That's fine to do later on IMHO, too.
> + for (i = 0; i < pipe->num_inputs; ++i) {
> + ret = vsp1_pipeline_validate_branch(pipe->inputs[i],
> + pipe->output);
> + if (ret < 0)
> + goto error;
> + }
> +
> + return 0;
> +
...
> +static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
> +{
> + struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
> + struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
> + struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
> + unsigned long flags;
> + bool empty;
> +
> + spin_lock_irqsave(&video->irqlock, flags);
> + empty = list_empty(&video->irqqueue);
> + list_add_tail(&buf->queue, &video->irqqueue);
> + spin_unlock_irqrestore(&video->irqlock, flags);
> +
> + if (empty) {
if (!empty)
return;
?
Up to you.
> + spin_lock_irqsave(&pipe->irqlock, flags);
> +
> + video->ops->queue(video, buf);
> + pipe->buffers_ready |= 1 << video->pipe_index;
> +
> + if (vb2_is_streaming(&video->queue) &&
> + vsp1_pipeline_ready(pipe))
> + vsp1_pipeline_run(pipe);
> +
> + spin_unlock_irqrestore(&pipe->irqlock, flags);
> + }
> +}
--
Kind regards,
Sakari Ailus
e-mail: sakari.ai...@iki.fi XMPP: sai...@retiisi.org.uk
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