Hi Jacopo,
On Thu, Aug 22, 2019 at 09:19:25PM +0200, Jacopo Mondi wrote:
> On Tue, Aug 20, 2019 at 09:42:15PM +0300, Laurent Pinchart wrote:
> > On Sat, Jul 06, 2019 at 04:07:46PM +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 <jacopo+renesas@xxxxxxxxxx>
> > > ---
> > > drivers/gpu/drm/rcar-du/rcar_du_kms.c | 35 +++++++++++++++++++++++++++
> > > 1 file changed, 35 insertions(+)
> > >
> > > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> > > index b79cda2f5531..f9aece78ca5f 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"
> > > @@ -287,6 +288,37 @@ 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]);
> > > + 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)
> > > {
> > > @@ -329,6 +361,9 @@ 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);
> > > +
> >
> > I think this looks good overall, but I wonder if we couldn't simplify
> > the CMM driver suspend/resume and LUT caching due to config while not
> > enabled by handling it on the DU side. I have a rework on the commit
> > tail handler in progress, I'll think how this could be done. For now I
> > think you can leave it as is.
>
> Does this mean I have your R-b tag ? :)
I'd like to review this in the context of v3 :-)
> > > /* 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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