Hi, On Fri, 2018-11-23 at 19:23 +0200, Ville Syrjälä wrote: > On Fri, Nov 23, 2018 at 04:55:33PM +0000, Ayan Halder wrote: > > On Fri, Nov 23, 2018 at 10:24:44AM +0100, Paul Kocialkowski wrote: > > > > Hi Paul, > > > > > This introduces new format helpers that use the previously-introduced > > > format info helpers for checking YUV sub-sampling. > > > > > > Only the format fourcc is required by these helpers and the formats are > > > iterated from the list. > > > > > > Signed-off-by: Paul Kocialkowski > > > --- > > > drivers/gpu/drm/drm_fourcc.c | 105 +++++++++++++++++++++++++++++++++++ > > > include/drm/drm_fourcc.h | 5 ++ > > > 2 files changed, 110 insertions(+) > > > > > > diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c > > > index b56e773f9f63..6d395c586ad5 100644 > > > --- a/drivers/gpu/drm/drm_fourcc.c > > > +++ b/drivers/gpu/drm/drm_fourcc.c > > > @@ -492,6 +492,111 @@ bool drm_format_is_yuv_planar(uint32_t format) > > > } > > > EXPORT_SYMBOL(drm_format_is_yuv_planar); > > > > > > +/** > > > + * drm_format_is_yuv_sampling_410 - check that the format is a YUV format with > > > + * 4:1:0 sub-sampling > > > + * @format: pixel format > > > + * > > > + * Returns: > > > + * A boolean indicating whether the format is a YUV format with 4:1:0 > > > + * sub-sampling. > > > + */ > > > +bool drm_format_is_yuv_sampling_410(uint32_t format) > > > +{ > > > + const struct drm_format_info *info; > > > + > > > + info = drm_format_info(format); > > > + if (!info) > > > + return false; > > Looks like you're doing a lot of drm_format_info(fb->format->format), > which doesn't make sense. Not to mention that each lookup is a linear > search so the costs may start to add up. > > Unless there's a really good reason I'd rather we try to remove all > the current helpers that do these lookups, and not add any more. I totally agree that we should be passing the drm_format_info structure onwards to all the driver helpers so we don't have to do the lookup each time. I thought it was still somewhat acceptable to have lookup fashions of these format helpers, but I am totally in favor of getting rid of them (and other lookup helpers eventually). I'll remove the lookup YUV format helpers and convert this series to passing the full drm_format_info everywhere needed. Cheers, Paul > > > + > > > + return drm_format_info_is_yuv_sampling_410(info); > > > +} > > > +EXPORT_SYMBOL(drm_format_is_yuv_sampling_410); > > > + > > > +/** > > > + * drm_format_is_yuv_sampling_411 - check that the format is a YUV format with > > > + * 4:1:1 sub-sampling > > > + * @format: pixel format > > > + * > > > + * Returns: > > > + * A boolean indicating whether the format is a YUV format with 4:1:1 > > > + * sub-sampling. > > > + */ > > > +bool drm_format_is_yuv_sampling_411(uint32_t format) > > > +{ > > > + const struct drm_format_info *info; > > > + > > > + info = drm_format_info(format); > > > + if (!info) > > > + return false; > > > + > > > + return drm_format_info_is_yuv_sampling_411(info); > > > +} > > > +EXPORT_SYMBOL(drm_format_is_yuv_sampling_411); > > > + > > > +/** > > > + * drm_format_is_yuv_sampling_420 - check that the format is a YUV format with > > > + * 4:2:0 sub-sampling > > > + * @format: pixel format > > > + * > > > + * Returns: > > > + * A boolean indicating whether the format is a YUV format with 4:2:0 > > > + * sub-sampling. > > > + */ > > > +bool drm_format_is_yuv_sampling_420(uint32_t format) > > > +{ > > > + const struct drm_format_info *info; > > > + > > > + info = drm_format_info(format); > > > + if (!info) > > > + return false; > > > + > > > + return drm_format_info_is_yuv_sampling_420(info); > > > +} > > > +EXPORT_SYMBOL(drm_format_is_yuv_sampling_420); > > > + > > > +/** > > > + * drm_format_is_yuv_sampling_422 - check that the format is a YUV format with > > > + * 4:2:2 sub-sampling > > > + * @format: pixel format > > > + * > > > + * Returns: > > > + * A boolean indicating whether the format is a YUV format with 4:2:2 > > > + * sub-sampling. > > > + */ > > > +bool drm_format_is_yuv_sampling_422(uint32_t format) > > > +{ > > > + const struct drm_format_info *info; > > > + > > > + info = drm_format_info(format); > > > + if (!info) > > > + return false; > > > + > > > + return drm_format_info_is_yuv_sampling_422(info); > > > +} > > > +EXPORT_SYMBOL(drm_format_is_yuv_sampling_422); > > > + > > > +/** > > > + * drm_format_is_yuv_sampling_444 - check that the format is a YUV format with > > > + * 4:4:4 sub-sampling > > > + * @format: pixel format > > > + * > > > + * Returns: > > > + * A boolean indicating whether the format is a YUV format with 4:4:4 > > > + * sub-sampling. > > > + */ > > > +bool drm_format_is_yuv_sampling_444(uint32_t format) > > > +{ > > > + const struct drm_format_info *info; > > > + > > > + info = drm_format_info(format); > > > + if (!info) > > > + return false; > > > + > > > + return drm_format_info_is_yuv_sampling_444(info); > > > +} > > > +EXPORT_SYMBOL(drm_format_is_yuv_sampling_444); > > > + > > > /** > > > * drm_format_info_block_width - width in pixels of block. > > > * @info: pixel format info > > > diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h > > > index d170b7b323f7..cf082d8b6ad4 100644 > > > --- a/include/drm/drm_fourcc.h > > > +++ b/include/drm/drm_fourcc.h > > > @@ -278,6 +278,11 @@ bool drm_format_is_yuv(uint32_t format); > > > bool drm_format_is_yuv_packed(uint32_t format); > > > bool drm_format_is_yuv_semiplanar(uint32_t format); > > > bool drm_format_is_yuv_planar(uint32_t format); > > > +bool drm_format_is_yuv_sampling_410(uint32_t format); > > > +bool drm_format_is_yuv_sampling_411(uint32_t format); > > > +bool drm_format_is_yuv_sampling_420(uint32_t format); > > > +bool drm_format_is_yuv_sampling_422(uint32_t format); > > > +bool drm_format_is_yuv_sampling_444(uint32_t format); > > > unsigned int drm_format_info_block_width(const struct drm_format_info *info, > > > int plane); > > > unsigned int drm_format_info_block_height(const struct drm_format_info *info, > > > -- > > > 2.19.1 > > > > > From patches [PATCH v2 08/43] till [PATCH v2 12/43], looks good to me. > > > > How about clubbing all the drm_format_helper functions together in a > > separate file (call it drm_fourcc_helper.c)? This way, we could > > keep the __drm_format_info[] only drm_fourcc.c. > > > > > _______________________________________________ > > > dri-devel mailing list > > > dri-devel@lists.freedesktop.org > > > https://lists.freedesktop.org/mailman/listinfo/dri-devel > > _______________________________________________ > > dri-devel mailing list > > dri-devel@lists.freedesktop.org > > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Paul Kocialkowski, Bootlin (formerly Free Electrons) Embedded Linux and kernel engineering https://bootlin.com