Hi Laurent, On Fri, Jun 07, 2019 at 03:06:33PM +0300, Laurent Pinchart wrote: > Hi Jacopo, > > Thank you for the patch. > > On Thu, Jun 06, 2019 at 04:22:20PM +0200, Jacopo Mondi wrote: > > Update CMM settings at in the atomic commit tail helper method. > > > > The CMM is updated with new gamma values provided to the driver > > in the GAMMA_LUT blob property. > > > > Signed-off-by: Jacopo Mondi <[email protected]> > > --- > > drivers/gpu/drm/rcar-du/rcar_du_kms.c | 36 +++++++++++++++++++++++++++ > > 1 file changed, 36 insertions(+) > > > > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c > > b/drivers/gpu/drm/rcar-du/rcar_du_kms.c > > index 5a910a04e1d9..29a2020a46b5 100644 > > --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c > > +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c > > @@ -21,6 +21,7 @@ > > #include <linux/of_platform.h> > > #include <linux/wait.h> > > > > +#include "rcar_cmm.h" > > #include "rcar_du_crtc.h" > > #include "rcar_du_drv.h" > > #include "rcar_du_encoder.h" > > @@ -367,6 +368,38 @@ rcar_du_fb_create(struct drm_device *dev, struct > > drm_file *file_priv, > > * Atomic Check and Update > > */ > > > > +static void rcar_du_atomic_commit_update_cmm(struct drm_crtc *crtc, > > + struct drm_crtc_state *old_state) > > +{ > > + struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); > > + struct rcar_cmm_config cmm_config = {}; > > + > > + if (!rcrtc->cmm || !crtc->state->color_mgmt_changed) > > + return; > > + > > + if (!crtc->state->gamma_lut) { > > + cmm_config.lut.enable = false; > > + rcar_cmm_setup(rcrtc->cmm, &cmm_config); > > + > > + return; > > + } > > + > > + cmm_config.lut.enable = true; > > + cmm_config.lut.table = (struct drm_color_lut *) > > + crtc->state->gamma_lut->data; > > + > > + /* Set LUT table size to 0 if entries should not be updated. */ > > + if (!old_state->gamma_lut || > > + (old_state->gamma_lut->base.id != > > + crtc->state->gamma_lut->base.id)) > > + cmm_config.lut.size = crtc->state->gamma_lut->length > > + / sizeof(cmm_config.lut.table[0]); > > Do you need to call rcar_cmm_setup() at all in this case ? >
Do you mean in case the lut.size field is set to 0 ?
I considered it useful when the CMM has to be re-enabled without
updateing the LUT table entries? It is not required in your opinion?
Thanks
j
> > + else
> > + cmm_config.lut.size = 0;
> > +
> > + rcar_cmm_setup(rcrtc->cmm, &cmm_config);
> > +}
> > +
> > static int rcar_du_atomic_check(struct drm_device *dev,
> > struct drm_atomic_state *state)
> > {
> > @@ -409,6 +442,9 @@ static void rcar_du_atomic_commit_tail(struct
> > drm_atomic_state *old_state)
> > rcdu->dpad1_source = rcrtc->index;
> > }
> >
> > + for_each_old_crtc_in_state(old_state, crtc, crtc_state, i)
> > + rcar_du_atomic_commit_update_cmm(crtc, crtc_state);
> > +
> > /* Apply the atomic update. */
> > drm_atomic_helper_commit_modeset_disables(dev, old_state);
> > drm_atomic_helper_commit_planes(dev, old_state,
>
> --
> Regards,
>
> Laurent Pinchart
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