On Fri, 01 Sep 2017 09:51:59 +0200
Andrzej Hajda <a.hajda@xxxxxxxxxxx> wrote:
> On 31.08.2017 17:55, Boris Brezillon wrote:
> > Add a driver for Cadence DPI -> DSI bridge.
> >
> > This driver only support a subset of Cadence DSI bridge capabilities.
> >
> > Here is a non-exhaustive list of missing features:
> > * burst mode
> > * dynamic configuration of the DPHY based on the
> > * support for additional input interfaces (SDI input)
> >
> > Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
> > ---
> > Changes in v3:
> > - replace magic values by real timing calculation. The DPHY PLL clock
> > is still hardcoded since we don't have a working DPHY block yet, and
> > this is the piece of HW we need to dynamically configure the PLL
> > rate based on the display refresh rate and the resolution.
> > - parse DSI devices represented with the OF-graph. This is needed to
> > support DSI devices controlled through an external bus like I2C or
> > SPI.
> > - use the DRM panel-bridge infrastructure to simplify the DRM panel
> > logic
> >
> > Changes in v2:
> > - rebase on v4.12-rc1 and adapt to driver to the drm_bridge API changes
> > - return the correct error when devm_clk_get(sysclk) fails
> > - add missing depends on OF and select DRM_PANEL in the Kconfig entry
> > ---
> > drivers/gpu/drm/bridge/Kconfig | 9 +
> > drivers/gpu/drm/bridge/Makefile | 1 +
> > drivers/gpu/drm/bridge/cdns-dsi.c | 1090 +++++++++++++++++++++++++++++++++++++
> > 3 files changed, 1100 insertions(+)
> > create mode 100644 drivers/gpu/drm/bridge/cdns-dsi.c
> >
> > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> > index adf9ae0e0b7c..88c324b12e16 100644
> > --- a/drivers/gpu/drm/bridge/Kconfig
> > +++ b/drivers/gpu/drm/bridge/Kconfig
> > @@ -25,6 +25,15 @@ config DRM_ANALOGIX_ANX78XX
> > the HDMI output of an application processor to MyDP
> > or DisplayPort.
> >
> > +config DRM_CDNS_DSI
> > + tristate "Cadence DPI/DSI bridge"
> > + select DRM_KMS_HELPER
> > + select DRM_MIPI_DSI
> > + select DRM_PANEL
>
> what about:
> select DRM_PANEL_BRIDGE
Oops, indeed. I'll add this dependency.
[...]
> > +
> > +static const struct of_device_id cdns_dsi_of_match[] = {
> > + { .compatible = "cdns,dsi-1.3.1" },
>
> Do you really need version here? Wouldn't be enough checking ID_REG?
> This is only suggestion, no strong feelings.
You're right, I'll drop the version number.
>
> The rest looks OK, so with Eric's comments addressed you can add:
> Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Thanks for your review.
Boris
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