[PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Marek Vasut]

Add the i.MX8MM BLK_CTL compatible string to the list.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Abel Vesa <abel.vesa@nxp.com>
Cc: Dong Aisheng <aisheng.dong@nxp.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Guido Günther <agx@sigxcpu.org>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: devicetree@vger.kernel.org
---
 Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml b/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
index 5e9eb402b9b6..346429f49093 100644
--- a/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
+++ b/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
@@ -20,6 +20,7 @@ properties:
   compatible:
     items:
       - enum:
+         - fsl,imx8mm-dispmix-blk-ctl
          - fsl,imx8mp-audio-blk-ctl
          - fsl,imx8mp-hdmi-blk-ctl
          - fsl,imx8mp-media-blk-ctl
-- 
2.28.0

[PATCH 2/5] dt-bindings: clock: imx8mm: Add media blk_ctl clock IDs

[Marek Vasut]

These will be used by the imx8mm for blk_ctl driver.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Abel Vesa <abel.vesa@nxp.com>
Cc: Dong Aisheng <aisheng.dong@nxp.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Guido Günther <agx@sigxcpu.org>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: devicetree@vger.kernel.org
---
 include/dt-bindings/clock/imx8mm-clock.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/dt-bindings/clock/imx8mm-clock.h b/include/dt-bindings/clock/imx8mm-clock.h
index e63a5530aed7..576b229a72f2 100644
--- a/include/dt-bindings/clock/imx8mm-clock.h
+++ b/include/dt-bindings/clock/imx8mm-clock.h
@@ -276,4 +276,11 @@
 
 #define IMX8MM_CLK_END				252
 
+#define IMX8MM_CLK_MEDIA_BLK_CTL_LCDIF_APB		0
+#define IMX8MM_CLK_MEDIA_BLK_CTL_LCDIF_PIXEL		1
+#define IMX8MM_CLK_MEDIA_BLK_CTL_MIPI_DSI_PCLK		2
+#define IMX8MM_CLK_MEDIA_BLK_CTL_MIPI_DSI_CLKREF	3
+
+#define IMX8MM_CLK_MEDIA_BLK_CTL_END			4
+
 #endif
-- 
2.28.0

Re: [PATCH 2/5] dt-bindings: clock: imx8mm: Add media blk_ctl clock IDs

[Rob Herring]

On Sun, 04 Oct 2020 00:45:52 +0200, Marek Vasut wrote:
> These will be used by the imx8mm for blk_ctl driver.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Abel Vesa <abel.vesa@nxp.com>
> Cc: Dong Aisheng <aisheng.dong@nxp.com>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Guido Günther <agx@sigxcpu.org>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: NXP Linux Team <linux-imx@nxp.com>
> Cc: devicetree@vger.kernel.org
> ---
>  include/dt-bindings/clock/imx8mm-clock.h | 7 +++++++
>  1 file changed, 7 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

[PATCH 3/5] dt-bindings: reset: imx8mm: Add media blk_ctl reset IDs

[Marek Vasut]

These will be used by the imx8mm for blk_ctl driver.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Abel Vesa <abel.vesa@nxp.com>
Cc: Dong Aisheng <aisheng.dong@nxp.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Guido Günther <agx@sigxcpu.org>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: devicetree@vger.kernel.org
---
 include/dt-bindings/reset/imx8mm-reset.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 include/dt-bindings/reset/imx8mm-reset.h

diff --git a/include/dt-bindings/reset/imx8mm-reset.h b/include/dt-bindings/reset/imx8mm-reset.h
new file mode 100644
index 000000000000..1dda59d30c06
--- /dev/null
+++ b/include/dt-bindings/reset/imx8mm-reset.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Marek Vasut <marex@denx.de>
+ */
+
+#ifndef DT_BINDING_RESET_IMX8MM_H
+#define DT_BINDING_RESET_IMX8MM_H
+
+#define IMX8MM_MEDIA_BLK_CTL_RESET_MIPI_DSI_I_PRESET	0
+#define IMX8MM_MEDIA_BLK_CTL_RESET_MIPI_M_RESET		1
+
+#define IMX8MM_MEDIA_BLK_CTL_RESET_NUM			2
+
+#endif
-- 
2.28.0

Re: [PATCH 3/5] dt-bindings: reset: imx8mm: Add media blk_ctl reset IDs

[Rob Herring]

On Sun, 04 Oct 2020 00:45:53 +0200, Marek Vasut wrote:
> These will be used by the imx8mm for blk_ctl driver.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Abel Vesa <abel.vesa@nxp.com>
> Cc: Dong Aisheng <aisheng.dong@nxp.com>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Guido Günther <agx@sigxcpu.org>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: NXP Linux Team <linux-imx@nxp.com>
> Cc: devicetree@vger.kernel.org
> ---
>  include/dt-bindings/reset/imx8mm-reset.h | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>  create mode 100644 include/dt-bindings/reset/imx8mm-reset.h
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Rob Herring]

On Sun, 04 Oct 2020 00:45:51 +0200, Marek Vasut wrote:
> Add the i.MX8MM BLK_CTL compatible string to the list.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Abel Vesa <abel.vesa@nxp.com>
> Cc: Dong Aisheng <aisheng.dong@nxp.com>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Guido Günther <agx@sigxcpu.org>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: NXP Linux Team <linux-imx@nxp.com>
> Cc: devicetree@vger.kernel.org
> ---
>  Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Adam Ford]

On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
>
> Add the i.MX8MM BLK_CTL compatible string to the list.
>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Abel Vesa <abel.vesa@nxp.com>
> Cc: Dong Aisheng <aisheng.dong@nxp.com>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Guido Günther <agx@sigxcpu.org>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: NXP Linux Team <linux-imx@nxp.com>
> Cc: devicetree@vger.kernel.org
> ---
>  Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
>  1 file changed, 1 insertion(+)
>

Is there a DTSI change part of this patch?  I was going to try to test
it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
sure where to put the node.

adam

> diff --git a/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml b/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
> index 5e9eb402b9b6..346429f49093 100644
> --- a/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
> +++ b/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
> @@ -20,6 +20,7 @@ properties:
>    compatible:
>      items:
>        - enum:
> +         - fsl,imx8mm-dispmix-blk-ctl
>           - fsl,imx8mp-audio-blk-ctl
>           - fsl,imx8mp-hdmi-blk-ctl
>           - fsl,imx8mp-media-blk-ctl
> --
> 2.28.0
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Marek Vasut]

On 10/7/20 9:52 PM, Adam Ford wrote:
> On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
>>
>> Add the i.MX8MM BLK_CTL compatible string to the list.
[...]
>> ---
>>  Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
>>  1 file changed, 1 insertion(+)
>>
> 
> Is there a DTSI change part of this patch?  I was going to try to test
> it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
> sure where to put the node.

There are in fact quite a few other pieces you need to have in place,
this patchset in itself is not particularly useful, it is just infra for
the LCDIF and MIPI DSIM block control. You might want to wait until they
all land in next and test that result.

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Adam Ford]

On Wed, Oct 7, 2020 at 3:03 PM Marek Vasut <marex@denx.de> wrote:
>
> On 10/7/20 9:52 PM, Adam Ford wrote:
> > On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
> >>
> >> Add the i.MX8MM BLK_CTL compatible string to the list.
> [...]
> >> ---
> >>  Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
> >>  1 file changed, 1 insertion(+)
> >>
> >
> > Is there a DTSI change part of this patch?  I was going to try to test
> > it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
> > sure where to put the node.
>
> There are in fact quite a few other pieces you need to have in place,
> this patchset in itself is not particularly useful, it is just infra for
> the LCDIF and MIPI DSIM block control. You might want to wait until they
> all land in next and test that result.

I have several patches in place, the GPCv2, this block driver,
enabling GPU DT node, I'm also working on the DSIM patch you posted.
I was hoping to test them all together and reply to the various
threads with tested-by.  I also want to get my device tree stuff ready
on the beacon boards so when everything lands, I can post DTS updates
to enable the LCDIF, DSI, and the HDMI bridge.

If you have a repo somewhere that has all these combined, I can just
work on the final layer to enable the device tree plumbing on my
board.  I just need the imx8mm.dtsi changes for this, DSIM, and the
LCDIF so I can finish the task.

adam

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Adam Ford]

On Wed, Oct 7, 2020 at 3:08 PM Adam Ford <aford173@gmail.com> wrote:
>
> On Wed, Oct 7, 2020 at 3:03 PM Marek Vasut <marex@denx.de> wrote:
> >
> > On 10/7/20 9:52 PM, Adam Ford wrote:
> > > On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
> > >>
> > >> Add the i.MX8MM BLK_CTL compatible string to the list.
> > [...]
> > >> ---
> > >>  Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
> > >>  1 file changed, 1 insertion(+)
> > >>
> > >
> > > Is there a DTSI change part of this patch?  I was going to try to test
> > > it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
> > > sure where to put the node.
> >
> > There are in fact quite a few other pieces you need to have in place,
> > this patchset in itself is not particularly useful, it is just infra for
> > the LCDIF and MIPI DSIM block control. You might want to wait until they
> > all land in next and test that result.
>
> I have several patches in place, the GPCv2, this block driver,
> enabling GPU DT node, I'm also working on the DSIM patch you posted.
> I was hoping to test them all together and reply to the various
> threads with tested-by.  I also want to get my device tree stuff ready
> on the beacon boards so when everything lands, I can post DTS updates
> to enable the LCDIF, DSI, and the HDMI bridge.
>
> If you have a repo somewhere that has all these combined, I can just
> work on the final layer to enable the device tree plumbing on my
> board.  I just need the imx8mm.dtsi changes for this, DSIM, and the
> LCDIF so I can finish the task.

On that note, I also have a i.MX8M Nano board which is similar to my
8MM.  If I understood the 8MM clock block driver better, I hope to
adapt your changes for the Nano too.  Once the GPCv2 driver is
accepted, I was also going to look at updating it to support the Nano
as well which also has the same DSIM and LCDIF as the 8MM as well and
a better GPU than the Mini but lacking the VPU.

adam
>
> adam

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Marek Vasut]

On 10/7/20 10:17 PM, Adam Ford wrote:
> On Wed, Oct 7, 2020 at 3:08 PM Adam Ford <aford173@gmail.com> wrote:
>>
>> On Wed, Oct 7, 2020 at 3:03 PM Marek Vasut <marex@denx.de> wrote:
>>>
>>> On 10/7/20 9:52 PM, Adam Ford wrote:
>>>> On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
>>>>>
>>>>> Add the i.MX8MM BLK_CTL compatible string to the list.
>>> [...]
>>>>> ---
>>>>>  Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
>>>>>  1 file changed, 1 insertion(+)
>>>>>
>>>>
>>>> Is there a DTSI change part of this patch?  I was going to try to test
>>>> it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
>>>> sure where to put the node.
>>>
>>> There are in fact quite a few other pieces you need to have in place,
>>> this patchset in itself is not particularly useful, it is just infra for
>>> the LCDIF and MIPI DSIM block control. You might want to wait until they
>>> all land in next and test that result.
>>
>> I have several patches in place, the GPCv2, this block driver,
>> enabling GPU DT node, I'm also working on the DSIM patch you posted.
>> I was hoping to test them all together and reply to the various
>> threads with tested-by.  I also want to get my device tree stuff ready
>> on the beacon boards so when everything lands, I can post DTS updates
>> to enable the LCDIF, DSI, and the HDMI bridge.
>>
>> If you have a repo somewhere that has all these combined, I can just
>> work on the final layer to enable the device tree plumbing on my
>> board.  I just need the imx8mm.dtsi changes for this, DSIM, and the
>> LCDIF so I can finish the task.
> 
> On that note, I also have a i.MX8M Nano board which is similar to my
> 8MM.  If I understood the 8MM clock block driver better, I hope to
> adapt your changes for the Nano too.  Once the GPCv2 driver is
> accepted, I was also going to look at updating it to support the Nano
> as well which also has the same DSIM and LCDIF as the 8MM as well and
> a better GPU than the Mini but lacking the VPU.

I don't have a branch, but I sent you the collected patches off-list.

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Frieder Schrempf]

Hi,

On 07.10.20 22:50, Marek Vasut wrote:
> On 10/7/20 10:17 PM, Adam Ford wrote:
>> On Wed, Oct 7, 2020 at 3:08 PM Adam Ford <aford173@gmail.com> wrote:
>>>
>>> On Wed, Oct 7, 2020 at 3:03 PM Marek Vasut <marex@denx.de> wrote:
>>>>
>>>> On 10/7/20 9:52 PM, Adam Ford wrote:
>>>>> On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
>>>>>>
>>>>>> Add the i.MX8MM BLK_CTL compatible string to the list.
>>>> [...]
>>>>>> ---
>>>>>>   Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
>>>>>>   1 file changed, 1 insertion(+)
>>>>>>
>>>>>
>>>>> Is there a DTSI change part of this patch?  I was going to try to test
>>>>> it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
>>>>> sure where to put the node.
>>>>
>>>> There are in fact quite a few other pieces you need to have in place,
>>>> this patchset in itself is not particularly useful, it is just infra for
>>>> the LCDIF and MIPI DSIM block control. You might want to wait until they
>>>> all land in next and test that result.
>>>
>>> I have several patches in place, the GPCv2, this block driver,
>>> enabling GPU DT node, I'm also working on the DSIM patch you posted.
>>> I was hoping to test them all together and reply to the various
>>> threads with tested-by.  I also want to get my device tree stuff ready
>>> on the beacon boards so when everything lands, I can post DTS updates
>>> to enable the LCDIF, DSI, and the HDMI bridge.
>>>
>>> If you have a repo somewhere that has all these combined, I can just
>>> work on the final layer to enable the device tree plumbing on my
>>> board.  I just need the imx8mm.dtsi changes for this, DSIM, and the
>>> LCDIF so I can finish the task.
>>
>> On that note, I also have a i.MX8M Nano board which is similar to my
>> 8MM.  If I understood the 8MM clock block driver better, I hope to
>> adapt your changes for the Nano too.  Once the GPCv2 driver is
>> accepted, I was also going to look at updating it to support the Nano
>> as well which also has the same DSIM and LCDIF as the 8MM as well and
>> a better GPU than the Mini but lacking the VPU.
> 
> I don't have a branch, but I sent you the collected patches off-list.
> 

I would also be interested in the patch collection for BLK_CTL, DSIM, 
etc. Marek, would you mind sending me those, too?

Adam, did you already set up a branch and do some tests with the full stack?

Thanks,
Frieder

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Adam Ford]

On Mon, Nov 30, 2020 at 5:47 AM Frieder Schrempf
<frieder.schrempf@kontron.de> wrote:
>
> Hi,
>
> On 07.10.20 22:50, Marek Vasut wrote:
> > On 10/7/20 10:17 PM, Adam Ford wrote:
> >> On Wed, Oct 7, 2020 at 3:08 PM Adam Ford <aford173@gmail.com> wrote:
> >>>
> >>> On Wed, Oct 7, 2020 at 3:03 PM Marek Vasut <marex@denx.de> wrote:
> >>>>
> >>>> On 10/7/20 9:52 PM, Adam Ford wrote:
> >>>>> On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
> >>>>>>
> >>>>>> Add the i.MX8MM BLK_CTL compatible string to the list.
> >>>> [...]
> >>>>>> ---
> >>>>>>   Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
> >>>>>>   1 file changed, 1 insertion(+)
> >>>>>>
> >>>>>
> >>>>> Is there a DTSI change part of this patch?  I was going to try to test
> >>>>> it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
> >>>>> sure where to put the node.
> >>>>
> >>>> There are in fact quite a few other pieces you need to have in place,
> >>>> this patchset in itself is not particularly useful, it is just infra for
> >>>> the LCDIF and MIPI DSIM block control. You might want to wait until they
> >>>> all land in next and test that result.
> >>>
> >>> I have several patches in place, the GPCv2, this block driver,
> >>> enabling GPU DT node, I'm also working on the DSIM patch you posted.
> >>> I was hoping to test them all together and reply to the various
> >>> threads with tested-by.  I also want to get my device tree stuff ready
> >>> on the beacon boards so when everything lands, I can post DTS updates
> >>> to enable the LCDIF, DSI, and the HDMI bridge.
> >>>
> >>> If you have a repo somewhere that has all these combined, I can just
> >>> work on the final layer to enable the device tree plumbing on my
> >>> board.  I just need the imx8mm.dtsi changes for this, DSIM, and the
> >>> LCDIF so I can finish the task.
> >>
> >> On that note, I also have a i.MX8M Nano board which is similar to my
> >> 8MM.  If I understood the 8MM clock block driver better, I hope to
> >> adapt your changes for the Nano too.  Once the GPCv2 driver is
> >> accepted, I was also going to look at updating it to support the Nano
> >> as well which also has the same DSIM and LCDIF as the 8MM as well and
> >> a better GPU than the Mini but lacking the VPU.
> >
> > I don't have a branch, but I sent you the collected patches off-list.
> >
>
> I would also be interested in the patch collection for BLK_CTL, DSIM,
> etc. Marek, would you mind sending me those, too?
>
> Adam, did you already set up a branch and do some tests with the full stack?

Frieder,

I have been monitoring some of the activity on the BLK_CTL.  It seems
like there is some disagreement on how to connect the power domain
controller with the BLK_CTL.  Someone reported that it causes a hang
on the 8MP, so until that gets resolved, I doubt we'll be able to use
the display system.  Some of the DSIM changes happening are being
pushed back for further changes, so it seems like having the full
integration might be a while.

adam
>
> Thanks,
> Frieder

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Frieder Schrempf]

Hi,

On 30.11.20 16:43, Adam Ford wrote:
> On Mon, Nov 30, 2020 at 5:47 AM Frieder Schrempf
> <frieder.schrempf@kontron.de> wrote:
>>
>> Hi,
>>
>> On 07.10.20 22:50, Marek Vasut wrote:
>>> On 10/7/20 10:17 PM, Adam Ford wrote:
>>>> On Wed, Oct 7, 2020 at 3:08 PM Adam Ford <aford173@gmail.com> wrote:
>>>>>
>>>>> On Wed, Oct 7, 2020 at 3:03 PM Marek Vasut <marex@denx.de> wrote:
>>>>>>
>>>>>> On 10/7/20 9:52 PM, Adam Ford wrote:
>>>>>>> On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
>>>>>>>>
>>>>>>>> Add the i.MX8MM BLK_CTL compatible string to the list.
>>>>>> [...]
>>>>>>>> ---
>>>>>>>>    Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
>>>>>>>>    1 file changed, 1 insertion(+)
>>>>>>>>
>>>>>>>
>>>>>>> Is there a DTSI change part of this patch?  I was going to try to test
>>>>>>> it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
>>>>>>> sure where to put the node.
>>>>>>
>>>>>> There are in fact quite a few other pieces you need to have in place,
>>>>>> this patchset in itself is not particularly useful, it is just infra for
>>>>>> the LCDIF and MIPI DSIM block control. You might want to wait until they
>>>>>> all land in next and test that result.
>>>>>
>>>>> I have several patches in place, the GPCv2, this block driver,
>>>>> enabling GPU DT node, I'm also working on the DSIM patch you posted.
>>>>> I was hoping to test them all together and reply to the various
>>>>> threads with tested-by.  I also want to get my device tree stuff ready
>>>>> on the beacon boards so when everything lands, I can post DTS updates
>>>>> to enable the LCDIF, DSI, and the HDMI bridge.
>>>>>
>>>>> If you have a repo somewhere that has all these combined, I can just
>>>>> work on the final layer to enable the device tree plumbing on my
>>>>> board.  I just need the imx8mm.dtsi changes for this, DSIM, and the
>>>>> LCDIF so I can finish the task.
>>>>
>>>> On that note, I also have a i.MX8M Nano board which is similar to my
>>>> 8MM.  If I understood the 8MM clock block driver better, I hope to
>>>> adapt your changes for the Nano too.  Once the GPCv2 driver is
>>>> accepted, I was also going to look at updating it to support the Nano
>>>> as well which also has the same DSIM and LCDIF as the 8MM as well and
>>>> a better GPU than the Mini but lacking the VPU.
>>>
>>> I don't have a branch, but I sent you the collected patches off-list.
>>>
>>
>> I would also be interested in the patch collection for BLK_CTL, DSIM,
>> etc. Marek, would you mind sending me those, too?
>>
>> Adam, did you already set up a branch and do some tests with the full stack?
> 
> Frieder,
> 
> I have been monitoring some of the activity on the BLK_CTL.  It seems
> like there is some disagreement on how to connect the power domain
> controller with the BLK_CTL.  Someone reported that it causes a hang
> on the 8MP, so until that gets resolved, I doubt we'll be able to use
> the display system.  Some of the DSIM changes happening are being
> pushed back for further changes, so it seems like having the full
> integration might be a while.

I have pulled all the latest patches, including Marek's off-list patches 
together in one branch based on v5.10-rc7 [1] if anyone is interested.

I added some fixes on top, that I needed to get my display behind 
another Toshiba DSI-DPI bridge working. Those are probably not 
upstreamable at all and need further investigation.

I'm hoping to reply to the individual threads for more feedback. I see 
that there are some blocking issues, but we hopefully get them resolved 
somehow.

Thanks
Frieder

[1] https://github.com/fschrempf/linux/commits/v5.10-mx8mm-graphics

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Tim Harvey]

 'On Thu, Dec 10, 2020 at 7:15 AM Frieder Schrempf
<frieder.schrempf@kontron.de> wrote:
>
> Hi,
>
> On 30.11.20 16:43, Adam Ford wrote:
> > On Mon, Nov 30, 2020 at 5:47 AM Frieder Schrempf
> > <frieder.schrempf@kontron.de> wrote:
> >>
> >> Hi,
> >>
> >> On 07.10.20 22:50, Marek Vasut wrote:
> >>> On 10/7/20 10:17 PM, Adam Ford wrote:
> >>>> On Wed, Oct 7, 2020 at 3:08 PM Adam Ford <aford173@gmail.com> wrote:
> >>>>>
> >>>>> On Wed, Oct 7, 2020 at 3:03 PM Marek Vasut <marex@denx.de> wrote:
> >>>>>>
> >>>>>> On 10/7/20 9:52 PM, Adam Ford wrote:
> >>>>>>> On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
> >>>>>>>>
> >>>>>>>> Add the i.MX8MM BLK_CTL compatible string to the list.
> >>>>>> [...]
> >>>>>>>> ---
> >>>>>>>>    Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
> >>>>>>>>    1 file changed, 1 insertion(+)
> >>>>>>>>
> >>>>>>>
> >>>>>>> Is there a DTSI change part of this patch?  I was going to try to test
> >>>>>>> it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
> >>>>>>> sure where to put the node.
> >>>>>>
> >>>>>> There are in fact quite a few other pieces you need to have in place,
> >>>>>> this patchset in itself is not particularly useful, it is just infra for
> >>>>>> the LCDIF and MIPI DSIM block control. You might want to wait until they
> >>>>>> all land in next and test that result.
> >>>>>
> >>>>> I have several patches in place, the GPCv2, this block driver,
> >>>>> enabling GPU DT node, I'm also working on the DSIM patch you posted.
> >>>>> I was hoping to test them all together and reply to the various
> >>>>> threads with tested-by.  I also want to get my device tree stuff ready
> >>>>> on the beacon boards so when everything lands, I can post DTS updates
> >>>>> to enable the LCDIF, DSI, and the HDMI bridge.
> >>>>>
> >>>>> If you have a repo somewhere that has all these combined, I can just
> >>>>> work on the final layer to enable the device tree plumbing on my
> >>>>> board.  I just need the imx8mm.dtsi changes for this, DSIM, and the
> >>>>> LCDIF so I can finish the task.
> >>>>
> >>>> On that note, I also have a i.MX8M Nano board which is similar to my
> >>>> 8MM.  If I understood the 8MM clock block driver better, I hope to
> >>>> adapt your changes for the Nano too.  Once the GPCv2 driver is
> >>>> accepted, I was also going to look at updating it to support the Nano
> >>>> as well which also has the same DSIM and LCDIF as the 8MM as well and
> >>>> a better GPU than the Mini but lacking the VPU.
> >>>
> >>> I don't have a branch, but I sent you the collected patches off-list.
> >>>
> >>
> >> I would also be interested in the patch collection for BLK_CTL, DSIM,
> >> etc. Marek, would you mind sending me those, too?
> >>
> >> Adam, did you already set up a branch and do some tests with the full stack?
> >
> > Frieder,
> >
> > I have been monitoring some of the activity on the BLK_CTL.  It seems
> > like there is some disagreement on how to connect the power domain
> > controller with the BLK_CTL.  Someone reported that it causes a hang
> > on the 8MP, so until that gets resolved, I doubt we'll be able to use
> > the display system.  Some of the DSIM changes happening are being
> > pushed back for further changes, so it seems like having the full
> > integration might be a while.
>
> I have pulled all the latest patches, including Marek's off-list patches
> together in one branch based on v5.10-rc7 [1] if anyone is interested.
>
> I added some fixes on top, that I needed to get my display behind
> another Toshiba DSI-DPI bridge working. Those are probably not
> upstreamable at all and need further investigation.
>
> I'm hoping to reply to the individual threads for more feedback. I see
> that there are some blocking issues, but we hopefully get them resolved
> somehow.
>
> Thanks
> Frieder
>
> [1] https://github.com/fschrempf/linux/commits/v5.10-mx8mm-graphics
>

Frieder,

Thanks for sharing your repo as it's getting hard to track these
patchsets (gpc/blk-ctl/power-domain/exynos/dsim). I'm also working on
display support for IMX8MM and in my case I'm trying to connect to a
RaspberryPi 7in display which I see Marek has been doing some work on
to split out drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c to
separate bridge, regulator/backlight, and simple-panel driver.

Marek,

Thanks for your recent work on splitting out the rpi display driver so
that it can be bound via device-tree. I have found that I need to move
the tc358762_init to enable vs pre-enable when using it with the
in-progress samsung-dsim driver else the driver fails writes due to
not being enabled yet:
diff --git a/drivers/gpu/drm/bridge/tc358762.c
b/drivers/gpu/drm/bridge/tc358762.c
index 1bfdfc6..0d88e61 100644
--- a/drivers/gpu/drm/bridge/tc358762.c
+++ b/drivers/gpu/drm/bridge/tc358762.c
@@ -153,11 +153,17 @@ static void tc358762_pre_enable(struct drm_bridge *bridge)
        if (ret < 0)
                dev_err(ctx->dev, "error enabling regulators (%d)\n", ret);

+       ctx->pre_enabled = true;
+}
+
+static void tc358762_enable(struct drm_bridge *bridge)
+{
+       struct tc358762 *ctx = bridge_to_tc358762(bridge);
+       int ret;
+
        ret = tc358762_init(ctx);
        if (ret < 0)
                dev_err(ctx->dev, "error initializing bridge (%d)\n", ret);
-
-       ctx->pre_enabled = true;
 }

 static int tc358762_attach(struct drm_bridge *bridge,
@@ -172,6 +178,7 @@ static int tc358762_attach(struct drm_bridge *bridge,
 static const struct drm_bridge_funcs tc358762_bridge_funcs = {
        .post_disable = tc358762_post_disable,
        .pre_enable = tc358762_pre_enable,
+       .enable = tc358762_enable,
        .attach = tc358762_attach,
 };

Frieder, I did find that your "drm/exynos: Fix PLL PMS offset for P
value bitfield" patch breaks the samsung_dsim_host_transfer for me
with the tc358762 bridge in the rpi panel. If I have that patch I get
a timeout on the transfer with some added debugging:
[    4.386387] tc358762_write 0x0210=0x00000003 0
[    4.387031] samsung_dsim_host_transfer ret: 0
[    4.387038] tc358762_write 0x0164=0x00000005 0
[    4.387375] samsung_dsim_host_transfer ret: 0
[    4.387379] tc358762_write 0x0168=0x00000005 0
[    4.387409] samsung_dsim_host_transfer ret: 0
[    4.387413] tc358762_write 0x0144=0x00000000 0
[    4.387741] samsung_dsim_host_transfer ret: 0
[    4.387745] tc358762_write 0x0148=0x00000000 0
[    4.387773] samsung_dsim_host_transfer ret: 0
[    4.387777] tc358762_write 0x0114=0x00000003 0
[    4.387804] samsung_dsim_host_transfer ret: 0
[    4.387808] tc358762_write 0x0450=0x00000000 0
[    4.387834] samsung_dsim_host_transfer ret: 0
[    4.387838] tc358762_write 0x0420=0x00100150 0
[    4.388168] samsung_dsim_host_transfer ret: 0
[    4.388172] tc358762_write 0x0464=0x0000040f 0
[    4.388200] samsung_dsim_host_transfer ret: 0
[    4.493346] tc358762_write 0x0104=0x00000001 0
[    5.509341] imx-dsim-dsi 32e10000.mipi_dsi: xfer timed out: 29 06
00 00 04 01 01 00 00 00
[    5.509345] samsung_dsim_host_transfer ret: -110
[    5.509348] tc358762_write mipi_dsi_generic_write failed err=-110
[    5.509352] tc358762_write 0x0204=0x00000001 -110
[    5.617336] tc358762_init failed err=-110
[    5.617344] tc358762 32e10000.mipi_dsi.0: error initializing bridge (-110)

Here is your patch which causes this issue for me:
diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c
b/drivers/gpu/drm/bridge/samsung-dsim.c
index cb1ec3c..fc7c1d0 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -174,7 +174,7 @@
 /* DSIM_PLLCTRL */
 #define DSIM_FREQ_BAND(x)              ((x) << 24)
 #define DSIM_PLL_EN                    (1 << 23)
-#define DSIM_PLL_P(x)                  ((x) << 13)
+#define DSIM_PLL_P(x)                  ((x) << 14)
 #define DSIM_PLL_M(x)                  ((x) << 4)
 #define DSIM_PLL_S(x)                  ((x) << 1)

I'm not very knowledgeable about MIPI DSI and find it strange that
several writes in tc35872_init succeed until the failing writes:
        tc358762_write(ctx, PPI_STARTPPI, PPI_START_FUNCTION);
        tc358762_write(ctx, DSI_STARTDSI, DSI_RX_START);

For what its worth I've backported Marek's rpi backlight/reglator and
simple-pannel driver to the NXP imx_5.4.47_2.2.0 kernel and do not see
any MIPI DSI write failure there, although I have the same behavior of
the display not showing anything.

Marek, are you using the rpi panel with IMX8MM? While I now have the
drivers probing without error and have a functional backlight,
regulator I see nothing on the display.

here is my dt fragment for my IMX8MM:
/ {
        panel {
                compatible = "powertip,ph800480t013-idf02";
                power-supply = <&attiny>;
                backlight = <&attiny>;
                port {
                        panel_in: endpointpanelin {
                                remote-endpoint = <&bridge_out>;
                        };
                };
        };
};

&i2c3 {
        edt-ft5x06@38 {
                compatible = "edt,edt-ft5x06";
                reg = <0x38>;
                pinctrl-0 = <&pinctrl_touchscreen>;
                interrupt-parent = <&gpio1>;
                interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
                vcc-supply = <&attiny>;
                invert;
                screen-x = <800>;
                screen-y = <480>;
        };

        attiny: regulator@45 {
                compatible = "raspberrypi,7inch-touchscreen-panel-regulator";
                reg = <0x45>;
        };
};

&mipi_dsi {
        #address-cells = <1>;
        #size-cells = <0>;
        status = "okay";

        bridge@0 {
                compatible = "toshiba,tc358762";
                reg = <0>;
                vddc-supply = <&attiny>;
                #address-cells = <1>;
                #size-cells = <0>;
                status = "okay";

                ports {
                        #address-cells = <1>;
                        #size-cells = <0>;

                        port@0 {
                                reg = <0>;
                                bridge_in: endpoint {
                                        remote-endpoint = <&dsi_out>;
                                };
                        };

                        port@1 {
                                reg = <1>;
                                bridge_out: endpoint {
                                        remote-endpoint = <&panel_in>;
                                };
                        };
                };
        };

        ports {
                port@1 {
                        reg = <1>;
                        dsi_out: endpoint {
                                remote-endpoint = <&bridge_in>;
                        };
                };
        };
};

And after booting I have:
/sys/class/backlight/7inch-touchscreen-panel-bl/ - backlight controller
/sys/class/regulator/regulator.9/ - tc358762-power
/sys/class/input/input1/ /dev/input/event1 - generic ft5x06 (79)
/sys/class/drm/card0
/sys/class/drm/card0-DPI-1
/sys/class/graphics/fb0 - mxsfb_drv.c

I'm using 'video=DPI-1:800x480@65M' in my kernel cmdline although I
don't think thats needed for fb display.

# fbset -i

mode "800x480"
    geometry 800 480 800 480 32
    timings 0 0 0 0 0 0 0
    accel true
    rgba 8/16,8/8,8/0,0/0
endmode

Frame buffer device information:
    Name        : mxsfb-drmdrmfb
    Address     : 0
    Size        : 1536000
    Type        : PACKED PIXELS
    Visual      : TRUECOLOR
    XPanStep    : 1
    YPanStep    : 1
    YWrapStep   : 0
    LineLength  : 3200
    Accelerator : No

# gst-launch-1.0 videotestsrc ! fbdevsink  # just shows a blank (but
backlit) display

Any idea what could be going wrong here?

Also Marek do you know why the edt-ft5x06 driver never seems to assert
it's interrupt? I haven't gotten that working even though I've wired
the INT pin from the display to a DIO on the IMX8MM.

Best Regards,

Tim

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Frieder Schrempf]

Hi Tim,

On 16.12.20 22:24, Tim Harvey wrote:
>   'On Thu, Dec 10, 2020 at 7:15 AM Frieder Schrempf
> <frieder.schrempf@kontron.de> wrote:
>>
>> Hi,
>>
>> On 30.11.20 16:43, Adam Ford wrote:
>>> On Mon, Nov 30, 2020 at 5:47 AM Frieder Schrempf
>>> <frieder.schrempf@kontron.de> wrote:
>>>>
>>>> Hi,
>>>>
>>>> On 07.10.20 22:50, Marek Vasut wrote:
>>>>> On 10/7/20 10:17 PM, Adam Ford wrote:
>>>>>> On Wed, Oct 7, 2020 at 3:08 PM Adam Ford <aford173@gmail.com> wrote:
>>>>>>>
>>>>>>> On Wed, Oct 7, 2020 at 3:03 PM Marek Vasut <marex@denx.de> wrote:
>>>>>>>>
>>>>>>>> On 10/7/20 9:52 PM, Adam Ford wrote:
>>>>>>>>> On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
>>>>>>>>>>
>>>>>>>>>> Add the i.MX8MM BLK_CTL compatible string to the list.
>>>>>>>> [...]
>>>>>>>>>> ---
>>>>>>>>>>     Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
>>>>>>>>>>     1 file changed, 1 insertion(+)
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Is there a DTSI change part of this patch?  I was going to try to test
>>>>>>>>> it, but  I am not seeing a change to the imx8mm.dtsi, and I am not
>>>>>>>>> sure where to put the node.
>>>>>>>>
>>>>>>>> There are in fact quite a few other pieces you need to have in place,
>>>>>>>> this patchset in itself is not particularly useful, it is just infra for
>>>>>>>> the LCDIF and MIPI DSIM block control. You might want to wait until they
>>>>>>>> all land in next and test that result.
>>>>>>>
>>>>>>> I have several patches in place, the GPCv2, this block driver,
>>>>>>> enabling GPU DT node, I'm also working on the DSIM patch you posted.
>>>>>>> I was hoping to test them all together and reply to the various
>>>>>>> threads with tested-by.  I also want to get my device tree stuff ready
>>>>>>> on the beacon boards so when everything lands, I can post DTS updates
>>>>>>> to enable the LCDIF, DSI, and the HDMI bridge.
>>>>>>>
>>>>>>> If you have a repo somewhere that has all these combined, I can just
>>>>>>> work on the final layer to enable the device tree plumbing on my
>>>>>>> board.  I just need the imx8mm.dtsi changes for this, DSIM, and the
>>>>>>> LCDIF so I can finish the task.
>>>>>>
>>>>>> On that note, I also have a i.MX8M Nano board which is similar to my
>>>>>> 8MM.  If I understood the 8MM clock block driver better, I hope to
>>>>>> adapt your changes for the Nano too.  Once the GPCv2 driver is
>>>>>> accepted, I was also going to look at updating it to support the Nano
>>>>>> as well which also has the same DSIM and LCDIF as the 8MM as well and
>>>>>> a better GPU than the Mini but lacking the VPU.
>>>>>
>>>>> I don't have a branch, but I sent you the collected patches off-list.
>>>>>
>>>>
>>>> I would also be interested in the patch collection for BLK_CTL, DSIM,
>>>> etc. Marek, would you mind sending me those, too?
>>>>
>>>> Adam, did you already set up a branch and do some tests with the full stack?
>>>
>>> Frieder,
>>>
>>> I have been monitoring some of the activity on the BLK_CTL.  It seems
>>> like there is some disagreement on how to connect the power domain
>>> controller with the BLK_CTL.  Someone reported that it causes a hang
>>> on the 8MP, so until that gets resolved, I doubt we'll be able to use
>>> the display system.  Some of the DSIM changes happening are being
>>> pushed back for further changes, so it seems like having the full
>>> integration might be a while.
>>
>> I have pulled all the latest patches, including Marek's off-list patches
>> together in one branch based on v5.10-rc7 [1] if anyone is interested.
>>
>> I added some fixes on top, that I needed to get my display behind
>> another Toshiba DSI-DPI bridge working. Those are probably not
>> upstreamable at all and need further investigation.
>>
>> I'm hoping to reply to the individual threads for more feedback. I see
>> that there are some blocking issues, but we hopefully get them resolved
>> somehow.
>>
>> Thanks
>> Frieder
>>
>> [1] https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ffschrempf%2Flinux%2Fcommits%2Fv5.10-mx8mm-graphics&amp;data=04%7C01%7Cfrieder.schrempf%40kontron.de%7C4b06e39a1030405300be08d8a20913f6%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637437507175831939%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=n1Y4HwamMfPukFuVEurgt7KOM9SMLkercFhgFMuE6ro%3D&amp;reserved=0
>>
> 
> Frieder,
> 
> Thanks for sharing your repo as it's getting hard to track these
> patchsets (gpc/blk-ctl/power-domain/exynos/dsim). I'm also working on
> display support for IMX8MM and in my case I'm trying to connect to a
> RaspberryPi 7in display which I see Marek has been doing some work on
> to split out drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c to
> separate bridge, regulator/backlight, and simple-panel driver.

thanks for the feedback and good to know of other people caring about 
upstream support.

> 
> Marek,
> 
> Thanks for your recent work on splitting out the rpi display driver so
> that it can be bound via device-tree. I have found that I need to move
> the tc358762_init to enable vs pre-enable when using it with the
> in-progress samsung-dsim driver else the driver fails writes due to
> not being enabled yet:
> diff --git a/drivers/gpu/drm/bridge/tc358762.c
> b/drivers/gpu/drm/bridge/tc358762.c
> index 1bfdfc6..0d88e61 100644
> --- a/drivers/gpu/drm/bridge/tc358762.c
> +++ b/drivers/gpu/drm/bridge/tc358762.c
> @@ -153,11 +153,17 @@ static void tc358762_pre_enable(struct drm_bridge *bridge)
>          if (ret < 0)
>                  dev_err(ctx->dev, "error enabling regulators (%d)\n", ret);
> 
> +       ctx->pre_enabled = true;
> +}
> +
> +static void tc358762_enable(struct drm_bridge *bridge)
> +{
> +       struct tc358762 *ctx = bridge_to_tc358762(bridge);
> +       int ret;
> +
>          ret = tc358762_init(ctx);
>          if (ret < 0)
>                  dev_err(ctx->dev, "error initializing bridge (%d)\n", ret);
> -
> -       ctx->pre_enabled = true;
>   }
> 
>   static int tc358762_attach(struct drm_bridge *bridge,
> @@ -172,6 +178,7 @@ static int tc358762_attach(struct drm_bridge *bridge,
>   static const struct drm_bridge_funcs tc358762_bridge_funcs = {
>          .post_disable = tc358762_post_disable,
>          .pre_enable = tc358762_pre_enable,
> +       .enable = tc358762_enable,
>          .attach = tc358762_attach,
>   };
> 
> Frieder, I did find that your "drm/exynos: Fix PLL PMS offset for P
> value bitfield" patch breaks the samsung_dsim_host_transfer for me
> with the tc358762 bridge in the rpi panel. If I have that patch I get
> a timeout on the transfer with some added debugging:
> [    4.386387] tc358762_write 0x0210=0x00000003 0
> [    4.387031] samsung_dsim_host_transfer ret: 0
> [    4.387038] tc358762_write 0x0164=0x00000005 0
> [    4.387375] samsung_dsim_host_transfer ret: 0
> [    4.387379] tc358762_write 0x0168=0x00000005 0
> [    4.387409] samsung_dsim_host_transfer ret: 0
> [    4.387413] tc358762_write 0x0144=0x00000000 0
> [    4.387741] samsung_dsim_host_transfer ret: 0
> [    4.387745] tc358762_write 0x0148=0x00000000 0
> [    4.387773] samsung_dsim_host_transfer ret: 0
> [    4.387777] tc358762_write 0x0114=0x00000003 0
> [    4.387804] samsung_dsim_host_transfer ret: 0
> [    4.387808] tc358762_write 0x0450=0x00000000 0
> [    4.387834] samsung_dsim_host_transfer ret: 0
> [    4.387838] tc358762_write 0x0420=0x00100150 0
> [    4.388168] samsung_dsim_host_transfer ret: 0
> [    4.388172] tc358762_write 0x0464=0x0000040f 0
> [    4.388200] samsung_dsim_host_transfer ret: 0
> [    4.493346] tc358762_write 0x0104=0x00000001 0
> [    5.509341] imx-dsim-dsi 32e10000.mipi_dsi: xfer timed out: 29 06
> 00 00 04 01 01 00 00 00
> [    5.509345] samsung_dsim_host_transfer ret: -110
> [    5.509348] tc358762_write mipi_dsi_generic_write failed err=-110
> [    5.509352] tc358762_write 0x0204=0x00000001 -110
> [    5.617336] tc358762_init failed err=-110
> [    5.617344] tc358762 32e10000.mipi_dsi.0: error initializing bridge (-110)
> 
> Here is your patch which causes this issue for me:
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c
> b/drivers/gpu/drm/bridge/samsung-dsim.c
> index cb1ec3c..fc7c1d0 100644
> --- a/drivers/gpu/drm/bridge/samsung-dsim.c
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -174,7 +174,7 @@
>   /* DSIM_PLLCTRL */
>   #define DSIM_FREQ_BAND(x)              ((x) << 24)
>   #define DSIM_PLL_EN                    (1 << 23)
> -#define DSIM_PLL_P(x)                  ((x) << 13)
> +#define DSIM_PLL_P(x)                  ((x) << 14)
>   #define DSIM_PLL_M(x)                  ((x) << 4)
>   #define DSIM_PLL_S(x)                  ((x) << 1)

As I already mentioned in the commit message of this change, I have no 
idea how the "correct" fix should look like or if there even is anything 
to fix here at all. It's just what I needed to get my setup working and 
I found it really odd that the NXP vendor implementation differs from 
the upstream Exynos driver in this place.

I have some other hardware setups with different bridges (LVDS/HDMI) 
behind the DSI and if I find some time, I will try them and see if they 
behave differently. Unfortunately I don't have any hardware to connect 
the RPi display to the i.MX8MM to test your setup.

Best regards
Frieder

> 
> I'm not very knowledgeable about MIPI DSI and find it strange that
> several writes in tc35872_init succeed until the failing writes:
>          tc358762_write(ctx, PPI_STARTPPI, PPI_START_FUNCTION);
>          tc358762_write(ctx, DSI_STARTDSI, DSI_RX_START);
> 
> For what its worth I've backported Marek's rpi backlight/reglator and
> simple-pannel driver to the NXP imx_5.4.47_2.2.0 kernel and do not see
> any MIPI DSI write failure there, although I have the same behavior of
> the display not showing anything.
> 
> Marek, are you using the rpi panel with IMX8MM? While I now have the
> drivers probing without error and have a functional backlight,
> regulator I see nothing on the display.

Re: [PATCH 1/5] Documentation: bindings: clk: Add bindings for i.MX8MM BLK_CTL

[Adam Ford]

On Sun, Oct 4, 2020 at 12:53 AM Marek Vasut <marex@denx.de> wrote:
>
> Add the i.MX8MM BLK_CTL compatible string to the list.

It seems that NXP has updated the TRM to Rev 3 for the i.MX8M.  For
what it's worth, section 13.2 calls this DISPLAY_BLK_CTRL

They better document the missing registers.

adam
>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Abel Vesa <abel.vesa@nxp.com>
> Cc: Dong Aisheng <aisheng.dong@nxp.com>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Guido Günther <agx@sigxcpu.org>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: NXP Linux Team <linux-imx@nxp.com>
> Cc: devicetree@vger.kernel.org
> ---
>  Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml b/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
> index 5e9eb402b9b6..346429f49093 100644
> --- a/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
> +++ b/Documentation/devicetree/bindings/clock/fsl,imx-blk-ctl.yaml
> @@ -20,6 +20,7 @@ properties:
>    compatible:
>      items:
>        - enum:
> +         - fsl,imx8mm-dispmix-blk-ctl
>           - fsl,imx8mp-audio-blk-ctl
>           - fsl,imx8mp-hdmi-blk-ctl
>           - fsl,imx8mp-media-blk-ctl
> --
> 2.28.0
>
>
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