Hi, Nancy:
On Wed, 2021-12-08 at 10:44 +0800, Nancy.Lin wrote:
> MT8195 have two mmsys. Modify drm for MT8195 multi-mmsys support.
> The two mmsys (vdosys0 and vdosys1) will bring up two drm drivers,
> only one drm driver register as the drm device.
> Each drm driver binds its own component. The last bind drm driver
> allocates and registers the drm device to drm core.
> Each crtc path is created with the corresponding drm driver data.
>
> Signed-off-by: Nancy.Lin <nancy.lin@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 24 +-
> drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 3 +-
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 300 ++++++++++++++++++--
> ----
> drivers/gpu/drm/mediatek/mtk_drm_drv.h | 10 +-
> 4 files changed, 246 insertions(+), 91 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index d661edf7e0fe..fe2871aca859 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -847,21 +847,28 @@ static int mtk_drm_crtc_init_comp_planes(struct
> drm_device *drm_dev,
> }
>
> int mtk_drm_crtc_create(struct drm_device *drm_dev,
> - const enum mtk_ddp_comp_id *path, unsigned int
> path_len)
> + const enum mtk_ddp_comp_id *path, unsigned int
> path_len,
> + int priv_data_index)
> {
> struct mtk_drm_private *priv = drm_dev->dev_private;
> struct device *dev = drm_dev->dev;
> struct mtk_drm_crtc *mtk_crtc;
> unsigned int num_comp_planes = 0;
> - int pipe = priv->num_pipes;
> int ret;
> int i;
> bool has_ctm = false;
> uint gamma_lut_size = 0;
> + struct drm_crtc *tmp;
> + int crtc_i = 0;
>
> if (!path)
> return 0;
>
> + priv = priv->all_drm_private[priv_data_index];
> +
> + drm_for_each_crtc(tmp, drm_dev)
> + crtc_i++;
> +
> for (i = 0; i < path_len; i++) {
> enum mtk_ddp_comp_id comp_id = path[i];
> struct device_node *node;
> @@ -873,7 +880,7 @@ int mtk_drm_crtc_create(struct drm_device
> *drm_dev,
> if (!node) {
> dev_info(dev,
> "Not creating crtc %d because
> component %d is disabled or missing\n",
> - pipe, comp_id);
> + crtc_i, comp_id);
> return 0;
> }
>
> @@ -926,29 +933,28 @@ int mtk_drm_crtc_create(struct drm_device
> *drm_dev,
>
> for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
> ret = mtk_drm_crtc_init_comp_planes(drm_dev, mtk_crtc,
> i,
> - pipe);
> + crtc_i);
> if (ret)
> return ret;
> }
>
> - ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
> + ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, crtc_i);
> if (ret < 0)
> return ret;
>
> if (gamma_lut_size)
> drm_mode_crtc_set_gamma_size(&mtk_crtc->base,
> gamma_lut_size);
> drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm,
> gamma_lut_size);
> - priv->num_pipes++;
> mutex_init(&mtk_crtc->hw_lock);
>
> #if IS_REACHABLE(CONFIG_MTK_CMDQ)
> + i = (priv->data->mbox_index) ? priv->data-
> >mbox_index[drm_crtc_index(&mtk_crtc->base)] : 0;
> mtk_crtc->cmdq_client.client.dev = mtk_crtc->mmsys_dev;
> mtk_crtc->cmdq_client.client.tx_block = false;
> mtk_crtc->cmdq_client.client.knows_txdone = true;
> mtk_crtc->cmdq_client.client.rx_callback = ddp_cmdq_cb;
> mtk_crtc->cmdq_client.chan =
> - mbox_request_channel(&mtk_crtc-
> >cmdq_client.client,
> - drm_crtc_index(&mtk_crtc-
> >base));
> + mbox_request_channel(&mtk_crtc-
> >cmdq_client.client, i);
I really do not understand how does i work. Could you give an example
of the i value for mt8173 crtc0, mt8173 crtc1, and all mt8195 crtcs.
> if (IS_ERR(mtk_crtc->cmdq_client.chan)) {
> dev_dbg(dev, "mtk_crtc %d failed to create mailbox
> client, writing register by CPU now\n",
> drm_crtc_index(&mtk_crtc->base));
> @@ -958,7 +964,7 @@ int mtk_drm_crtc_create(struct drm_device
> *drm_dev,
> if (mtk_crtc->cmdq_client.chan) {
> ret = of_property_read_u32_index(priv->mutex_node,
> "mediatek,gce-events",
> - drm_crtc_index(&mtk_cr
> tc->base),
> + i,
> &mtk_crtc-
> >cmdq_event);
> if (ret) {
> dev_dbg(dev, "mtk_crtc %d failed to get
> mediatek,gce-events property\n",
>
[snip]
>
> static const struct mtk_mmsys_driver_data mt8195_vdosys0_driver_data
> = {
> .main_path = mt8195_mtk_ddp_main,
> .main_len = ARRAY_SIZE(mt8195_mtk_ddp_main),
> + .mmsys_dev_num = 2,
After this patch, vdosys0 would not work. So set this to 1 in this
patch, and set this to 2 in the mt8195 vdosys1 patch.
Regards,
CK
> };
>
>
