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Hi, Shawn:
On Thu, 2024-06-06 at 17:26 +0800, Shawn Sung wrote:
> From: Hsiao Chien Sung <shawn.sung@mediatek.com>
>
> Register CRC related function pointers to support
> CRC retrieval.
>
> Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
> ---
[snip]
>
> +static void mtk_crtc_crc_work(struct kthread_work *base)
> +{
> +struct drm_vblank_work *work = to_drm_vblank_work(base);
> +struct mtk_crtc *mtk_crtc =
> +container_of(work, typeof(*mtk_crtc), crc_work);
> +struct mtk_ddp_comp *comp = mtk_crtc->crc_provider;
> +
> +if (!comp) {
> +DRM_WARN("%s(crtc-%d): no crc provider\n",
> + __func__, drm_crtc_index(&mtk_crtc->base));
> +return;
> +}
> +
> +if (mtk_crtc->base.crc.opened) {
> +u64 vblank = drm_crtc_vblank_count(&mtk_crtc->base);
> +
> +comp->funcs->crc_read(comp->dev);
> +
> +/* could take more than 50ms to finish */
> +drm_crtc_add_crc_entry(&mtk_crtc->base, true, vblank,
> + comp->funcs->crc_entry(comp->dev));
It seems that you could regenerate cmdq packet for crc here. So crtc
atomic flush and crc could use the same mailbox channel.
Regards,
CK
> +
> +drm_vblank_work_schedule(&mtk_crtc->crc_work, vblank + 1, true);
> +} else {
> +comp->funcs->crc_stop(comp->dev);
> +}
> +}
> +
</pre>
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