drm/msm: Support quad pipe with dual-DSI

[PATCH 01/21] drm/msm/dsi: add support to DSI CTRL v2.8.0

Posted by Jun Nie 1 year, 5 months ago

From: Jonathan Marek <jonathan@marek.ca>

Add support to DSI CTRL v2.8.0 with priority support

Signed-off-by: Jun Nie <jun.nie@linaro.org>
---
 drivers/gpu/drm/msm/dsi/dsi_host.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 185d7de0bf376..6388bb12696ff 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -2238,13 +2238,23 @@ int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
 	return ret;
 }
 
+#define DSI_VBIF_CTRL			(0x01CC - 4)
+#define DSI_VBIF_CTRL_PRIORITY		0x07
+
 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
 				  u32 len)
 {
 	struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+	const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
+	u32 reg;
 
 	dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
 	dsi_write(msm_host, REG_DSI_DMA_LEN, len);
+	if (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V2_8_0) {
+		reg = dsi_read(msm_host, DSI_VBIF_CTRL);
+		reg |= (DSI_VBIF_CTRL_PRIORITY & 0x7);
+		dsi_write(msm_host, DSI_VBIF_CTRL, reg);
+	}
 	dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
 
 	/* Make sure trigger happens */

-- 
2.34.1

Re: [PATCH 01/21] drm/msm/dsi: add support to DSI CTRL v2.8.0

Posted by Dmitry Baryshkov 1 year, 5 months ago

On Thu, 29 Aug 2024 at 13:19, Jun Nie <jun.nie@linaro.org> wrote:
>
> From: Jonathan Marek <jonathan@marek.ca>
>
> Add support to DSI CTRL v2.8.0 with priority support

Proper description is missing

>
> Signed-off-by: Jun Nie <jun.nie@linaro.org>

Several tags are missing here.

Also, how is this patch related to quadpipe?

> ---
>  drivers/gpu/drm/msm/dsi/dsi_host.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 185d7de0bf376..6388bb12696ff 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -2238,13 +2238,23 @@ int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
>         return ret;
>  }
>
> +#define DSI_VBIF_CTRL                  (0x01CC - 4)
> +#define DSI_VBIF_CTRL_PRIORITY         0x07
> +
>  void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
>                                   u32 len)
>  {
>         struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
> +       const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
> +       u32 reg;
>
>         dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
>         dsi_write(msm_host, REG_DSI_DMA_LEN, len);
> +       if (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V2_8_0) {
> +               reg = dsi_read(msm_host, DSI_VBIF_CTRL);
> +               reg |= (DSI_VBIF_CTRL_PRIORITY & 0x7);
> +               dsi_write(msm_host, DSI_VBIF_CTRL, reg);
> +       }
>         dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
>
>         /* Make sure trigger happens */
>
> --
> 2.34.1
>


-- 
With best wishes
Dmitry

Re: [PATCH 01/21] drm/msm/dsi: add support to DSI CTRL v2.8.0

Posted by Jun Nie 1 year, 5 months ago

Dmitry Baryshkov <dmitry.baryshkov@linaro.org> 于2024年8月29日周四 18:35写道：
>
> On Thu, 29 Aug 2024 at 13:19, Jun Nie <jun.nie@linaro.org> wrote:
> >
> > From: Jonathan Marek <jonathan@marek.ca>
> >
> > Add support to DSI CTRL v2.8.0 with priority support
>
> Proper description is missing

Actually, there is no clear doc for this register. Any URL or
doc key word to search?
>
> >
> > Signed-off-by: Jun Nie <jun.nie@linaro.org>
>
> Several tags are missing here.

Co-develop and SoB tag, right?
>
> Also, how is this patch related to quadpipe?

It is a must per test. Maybe it is just related to dual-DSI.
We can have answer if 2:2:2 is enabled.

- Jun

Re: [PATCH 01/21] drm/msm/dsi: add support to DSI CTRL v2.8.0

Posted by Dmitry Baryshkov 1 year, 5 months ago

On Tue, 3 Sept 2024 at 11:11, Jun Nie <jun.nie@linaro.org> wrote:
>
> Dmitry Baryshkov <dmitry.baryshkov@linaro.org> 于2024年8月29日周四 18:35写道：
> >
> > On Thu, 29 Aug 2024 at 13:19, Jun Nie <jun.nie@linaro.org> wrote:
> > >
> > > From: Jonathan Marek <jonathan@marek.ca>
> > >
> > > Add support to DSI CTRL v2.8.0 with priority support
> >
> > Proper description is missing
>
> Actually, there is no clear doc for this register. Any URL or
> doc key word to search?

Do you have a corresponding change in the vendor driver? If not, where
does this come from? What does it fix? What doesn't work if the
register isn't programmed? Answers to such questions should be a part
of the commit message.

> >
> > >
> > > Signed-off-by: Jun Nie <jun.nie@linaro.org>
> >
> > Several tags are missing here.
>
> Co-develop and SoB tag, right?

yep

> >
> > Also, how is this patch related to quadpipe?
>
> It is a must per test. Maybe it is just related to dual-DSI.
> We can have answer if 2:2:2 is enabled.

Tests are a separate story. You can send a separate series and mention
it in the cover letter. However this is not a part of the quad-pipe
support per se.

-- 
With best wishes
Dmitry