[PATCH 1/5] drm/encoder_slave: make mode_valid accept const struct drm_display_mode

[Dmitry Baryshkov]

On Sun, 17 Nov 2024 at 22:54, Laurent Pinchart
<laurent.pinchart at ideasonboard.com> wrote:
>
> Hi Dmitry,
>
> Thank you for the patch.
>
> On Fri, Nov 15, 2024 at 11:09:26PM +0200, Dmitry Baryshkov wrote:
> > The mode_valid() callbacks of drm_encoder, drm_crtc and drm_bridge
> > accept const struct drm_display_mode argument. Change the mode_valid
> > callback of drm_encoder_slave to also accept const argument.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
>
> On a side note, there's only two I2C slave encoder drivers left... I
> wonder if we could so something about them. The ch7006 and sil164
> drivers seem to be used by nouveau only, could they be moved to
> drivers/gpu/drm/nouveau/ ? We would move the whole drm_encoder_slave
> implementation there too, and leave it to die (or get taken out of limbo
> and fixed) with dispnv04.

Or it might be better to switch to drm_bridge. Currently we also have
sil164 (sub)drivers in ast and i915 drivers. I don't know if there is
any common code to share or not. If there is some, it might be nice to
use common framework.

>
> > ---
> >  drivers/gpu/drm/i2c/ch7006_drv.c          | 2 +-
> >  drivers/gpu/drm/i2c/sil164_drv.c          | 2 +-
> >  drivers/gpu/drm/nouveau/dispnv04/tvnv17.c | 2 +-
> >  include/drm/drm_encoder_slave.h           | 2 +-
> >  4 files changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i2c/ch7006_drv.c b/drivers/gpu/drm/i2c/ch7006_drv.c
> > index 131512a5f3bd996ad1e2eb869ffa09837daba0c7..a57f0a41c1a9e2006142fe0bad2914b0c344c82a 100644
> > --- a/drivers/gpu/drm/i2c/ch7006_drv.c
> > +++ b/drivers/gpu/drm/i2c/ch7006_drv.c
> > @@ -104,7 +104,7 @@ static bool ch7006_encoder_mode_fixup(struct drm_encoder *encoder,
> >  }
> >
> >  static int ch7006_encoder_mode_valid(struct drm_encoder *encoder,
> > -                                  struct drm_display_mode *mode)
> > +                                  const struct drm_display_mode *mode)
> >  {
> >       if (ch7006_lookup_mode(encoder, mode))
> >               return MODE_OK;
> > diff --git a/drivers/gpu/drm/i2c/sil164_drv.c b/drivers/gpu/drm/i2c/sil164_drv.c
> > index ff23422727fce290a188e495d343e32bc2c373ec..708e119072fcb50c31b5596b75dc341429b93697 100644
> > --- a/drivers/gpu/drm/i2c/sil164_drv.c
> > +++ b/drivers/gpu/drm/i2c/sil164_drv.c
> > @@ -255,7 +255,7 @@ sil164_encoder_restore(struct drm_encoder *encoder)
> >
> >  static int
> >  sil164_encoder_mode_valid(struct drm_encoder *encoder,
> > -                       struct drm_display_mode *mode)
> > +                       const struct drm_display_mode *mode)
> >  {
> >       struct sil164_priv *priv = to_sil164_priv(encoder);
> >
> > diff --git a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
> > index 3ecb101d23e949b753b873d24eec01ad6fe7f5d6..35ad4e10d27323c87704a3ff35b7dc26462c82bd 100644
> > --- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
> > +++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
> > @@ -308,7 +308,7 @@ static int nv17_tv_get_modes(struct drm_encoder *encoder,
> >  }
> >
> >  static int nv17_tv_mode_valid(struct drm_encoder *encoder,
> > -                           struct drm_display_mode *mode)
> > +                           const struct drm_display_mode *mode)
> >  {
> >       struct nv17_tv_norm_params *tv_norm = get_tv_norm(encoder);
> >
> > diff --git a/include/drm/drm_encoder_slave.h b/include/drm/drm_encoder_slave.h
> > index 49172166a164474f43e4afb2eeeb3cde8ae7c61a..b526643833dcf78bae29f9fbbe27de3f730b55d8 100644
> > --- a/include/drm/drm_encoder_slave.h
> > +++ b/include/drm/drm_encoder_slave.h
> > @@ -85,7 +85,7 @@ struct drm_encoder_slave_funcs {
> >        * @mode_valid: Analogous to &drm_encoder_helper_funcs @mode_valid.
> >        */
> >       int (*mode_valid)(struct drm_encoder *encoder,
> > -                       struct drm_display_mode *mode);
> > +                       const struct drm_display_mode *mode);
> >       /**
> >        * @mode_set: Analogous to &drm_encoder_helper_funcs @mode_set
> >        * callback. Wrapped by drm_i2c_encoder_mode_set().
> >
>
> --
> Regards,
>
> Laurent Pinchart



-- 
With best wishes
Dmitry