diff mbox series

[V2] dt-bindings: bridge: samsung-dsim: Make some flags optional

Message ID 20230528132727.3933-1-aford173@gmail.com
State New
Headers
Series [V2] dt-bindings: bridge: samsung-dsim: Make some flags optional |

Commit Message

Adam Ford May 28, 2023, 1:27 p.m. UTC 
  In the event a device is connected to the samsung-dsim
controller that doesn't support the burst-clock, the
driver is able to get the requested pixel clock from the
attached device or bridge.  In these instances, the
samsung,burst-clock-frequency isn't needed, so remove
it from the required list.

The pll-clock frequency can be set by the device tree entry
for samsung,pll-clock-frequency, but in some cases, the
pll-clock may have the same clock rate as sclk_mipi clock.
If they are equal, this flag is not needed since the driver
will use the sclk_mipi rate as a fallback.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
---
V2:  Split from driver series.  Re-word updates for burst
and pll-clock frequency.

Comments

Adam Ford May 28, 2023, 6:14 p.m. UTC | #1 
On Sun, May 28, 2023 at 8:34 AM Jagan Teki <jagan@amarulasolutions.com> wrote:
>
> On Sun, May 28, 2023 at 6:57 PM Adam Ford <aford173@gmail.com> wrote:
> >
> > In the event a device is connected to the samsung-dsim
> > controller that doesn't support the burst-clock, the
> > driver is able to get the requested pixel clock from the
> > attached device or bridge.  In these instances, the
> > samsung,burst-clock-frequency isn't needed, so remove
> > it from the required list.
> >
> > The pll-clock frequency can be set by the device tree entry
> > for samsung,pll-clock-frequency, but in some cases, the
> > pll-clock may have the same clock rate as sclk_mipi clock.
> > If they are equal, this flag is not needed since the driver
> > will use the sclk_mipi rate as a fallback.
> >
> > Signed-off-by: Adam Ford <aford173@gmail.com>
> > Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> > ---
> > V2:  Split from driver series.  Re-word updates for burst
> > and pll-clock frequency.
> >
> > diff --git a/Documentation/devicetree/bindings/display/bridge/samsung,mipi-dsim.yaml b/Documentation/devicetree/bindings/display/bridge/samsung,mipi-dsim.yaml
> > index 9f61ebdfefa8..06b6c44d4641 100644
> > --- a/Documentation/devicetree/bindings/display/bridge/samsung,mipi-dsim.yaml
> > +++ b/Documentation/devicetree/bindings/display/bridge/samsung,mipi-dsim.yaml
> > @@ -70,7 +70,9 @@ properties:
> >    samsung,burst-clock-frequency:
> >      $ref: /schemas/types.yaml#/definitions/uint32
> >      description:
> > -      DSIM high speed burst mode frequency.
> > +      DSIM high speed burst mode frequency.  If absent,
> > +      the pixel clock from the attached device or bridge
> > +      will be used instead.
> >
> >    samsung,esc-clock-frequency:
> >      $ref: /schemas/types.yaml#/definitions/uint32
> > @@ -80,7 +82,8 @@ properties:
> >    samsung,pll-clock-frequency:
> >      $ref: /schemas/types.yaml#/definitions/uint32
> >      description:
> > -      DSIM oscillator clock frequency.
> > +      DSIM oscillator clock frequency. If absent, the clock frequency
> > +      of sclk_mipi will be used instead.
>
> Maybe this explicit comment won't require as it is not listed in "required"

I mostly listed it here to explain why it's being removed from the
required list and what happens if it's missing.
>
> Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Fabio Estevam May 28, 2023, 10:33 p.m. UTC | #2 
On Sun, May 28, 2023 at 10:27 AM Adam Ford <aford173@gmail.com> wrote:
>
> In the event a device is connected to the samsung-dsim
> controller that doesn't support the burst-clock, the
> driver is able to get the requested pixel clock from the
> attached device or bridge.  In these instances, the
> samsung,burst-clock-frequency isn't needed, so remove
> it from the required list.
>
> The pll-clock frequency can be set by the device tree entry
> for samsung,pll-clock-frequency, but in some cases, the
> pll-clock may have the same clock rate as sclk_mipi clock.
> If they are equal, this flag is not needed since the driver
> will use the sclk_mipi rate as a fallback.
>
> Signed-off-by: Adam Ford <aford173@gmail.com>
> Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> ---
> V2:  Split from driver series.  Re-word updates for burst
> and pll-clock frequency.

Reviewed-by: Fabio Estevam <festevam@gmail.com>
Neil Armstrong May 30, 2023, 8:06 a.m. UTC | #3 
Hi,

On Sun, 28 May 2023 08:27:27 -0500, Adam Ford wrote:
> In the event a device is connected to the samsung-dsim
> controller that doesn't support the burst-clock, the
> driver is able to get the requested pixel clock from the
> attached device or bridge.  In these instances, the
> samsung,burst-clock-frequency isn't needed, so remove
> it from the required list.
> 
> [...]

Thanks, Applied to https://anongit.freedesktop.org/git/drm/drm-misc.git (drm-misc-next)

[1/1] dt-bindings: bridge: samsung-dsim: Make some flags optional
      https://cgit.freedesktop.org/drm/drm-misc/commit/?id=5769b45abedca0b9d14145e156c180af36139416
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/display/bridge/samsung,mipi-dsim.yaml b/Documentation/devicetree/bindings/display/bridge/samsung,mipi-dsim.yaml
index 9f61ebdfefa8..06b6c44d4641 100644
--- a/Documentation/devicetree/bindings/display/bridge/samsung,mipi-dsim.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/samsung,mipi-dsim.yaml
@@ -70,7 +70,9 @@  properties:
   samsung,burst-clock-frequency:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:
-      DSIM high speed burst mode frequency.
+      DSIM high speed burst mode frequency.  If absent,
+      the pixel clock from the attached device or bridge
+      will be used instead.
 
   samsung,esc-clock-frequency:
     $ref: /schemas/types.yaml#/definitions/uint32
@@ -80,7 +82,8 @@  properties:
   samsung,pll-clock-frequency:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:
-      DSIM oscillator clock frequency.
+      DSIM oscillator clock frequency. If absent, the clock frequency
+      of sclk_mipi will be used instead.
 
   phys:
     maxItems: 1
@@ -134,9 +137,7 @@  required:
   - compatible
   - interrupts
   - reg
-  - samsung,burst-clock-frequency
   - samsung,esc-clock-frequency
-  - samsung,pll-clock-frequency
 
 allOf:
   - $ref: ../dsi-controller.yaml#