Re: [PATCH v3 0/3] drm: atmel-hlcdc: clut support

From: Boris Brezillon
Date: Mon Jun 19 2017 - 16:09:36 EST

Le Mon, 19 Jun 2017 09:44:23 +0200,
Peter Rosin <peda@xxxxxxxxxx> a Ãcrit :

> Hi!
> This series adds support for an 8-bit clut mode in the atmel-hlcdc
> driver.
> I have now tested patch 1 with the below program (modeset.c
> adapted from
> to use an 8-bit mode).

I'm glad you finally find a way to test it. Patch 1 looks good to me,
except I would have added the missing .set_property in a separate patch
(placed at the beginning of the series).

> Since v2 I have also cleared up why the first 16 entries of the clut
> was not working right. It was of course my own damn fault, and the
> fix was in atmel_hlcdc_layer_write_clut function which called the
> ...write_reg function which in turn added an extra offset of 16
> registers...
> Changes since v2:
> - Fix mapping to the clut registers.
> Changes since v1:
> - Move the clut update from atmel_hlcdc_crtc_mode_valid to
> atmel_hlcdc_plane_atomic_update.
> - Add default .gamma_set helper (drm_atomic_helper_legacy_gamma_set).
> - Don't keep a spare copy of the clut, reuse gamma_store instead.
> - Don't try to synchronize the legacy fb clut with the drm clut.
> As I said in v2, I have not added any .clut_offset to the overlay2
> layer of sama5d4, since the chip does not appear to have that layer.
> I didn't do that to make it easier to work with the patch previously
> sent to remove that layer, but I suspect bad things may happen to
> sama5d4 users if they do not have that layer removed.
> Cheers,
> peda