Le 13/03/24 - 12:20, Randy Dunlap a écrit :
> Hi,
>
> On 3/13/24 10:45, Louis Chauvet wrote:
> > From: Arthur Grillo <arthurgri...@riseup.net>
> >
>
> >
> > Signed-off-by: Arthur Grillo <arthurgri...@riseup.net>
> > [Louis Chauvet:
> > - Adapted Arthur's work
> > - Implemented the read_line_t callbacks for yuv
> > - add struct conversion_matrix
> > - remove struct pixel_yuv_u8
> > - update the commit message
> > - Merge the modifications from Arthur]
> > Signed-off-by: Louis Chauvet <louis.chau...@bootlin.com>
> > ---
> > drivers/gpu/drm/vkms/vkms_drv.h | 22 ++
> > drivers/gpu/drm/vkms/vkms_formats.c | 431
> > ++++++++++++++++++++++++++++++++++++
> > drivers/gpu/drm/vkms/vkms_formats.h | 4 +
> > drivers/gpu/drm/vkms/vkms_plane.c | 17 +-
> > 4 files changed, 473 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/vkms/vkms_drv.h
> > b/drivers/gpu/drm/vkms/vkms_drv.h
> > index 23e1d247468d..f3116084de5a 100644
> > --- a/drivers/gpu/drm/vkms/vkms_drv.h
> > +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> > @@ -99,6 +99,27 @@ typedef void (*pixel_read_line_t)(const struct
> > vkms_plane_state *plane, int x_st
> > int y_start, enum pixel_read_direction
> > direction, int count,
> > struct pixel_argb_u16 out_pixel[]);
> >
> > +/**
> > + * CONVERSION_MATRIX_FLOAT_DEPTH - Number of digits after the point for
> > conversion matrix values
>
> This should be
>
> + * define CONVERSION_MATRIX_FLOAT_DEPTH - Number of digits after the point
> for conversion matrix values
>
> to conform to kernel-doc format.
>
> > + */
> > +#define CONVERSION_MATRIX_FLOAT_DEPTH 32
> > +
Hi Randy,
Thanks for your feedback.
I missed it while squashing Arthur's work, but this constant is not needed
anymore, it will be removed in v6.
For all other kernel-doc formatting (PATCHv5 03/16, PATCH V5 05/16), I
will correct them in the v6.
Kind regards,
Louis Chauvet
> > diff --git a/drivers/gpu/drm/vkms/vkms_formats.c
> > b/drivers/gpu/drm/vkms/vkms_formats.c
> > index 1449a0e6c706..edbf4b321b91 100644
> > --- a/drivers/gpu/drm/vkms/vkms_formats.c
> > +++ b/drivers/gpu/drm/vkms/vkms_formats.c
>
> > +/**
> > + * get_conversion_matrix_to_argb_u16() - Retrieve the correct yuv to rgb
> > conversion matrix for a
> > + * given encoding and range.
> > + *
> > + * If the matrix is not found, return a null pointer. In all other cases,
> > it return a simple
> > + * diagonal matrix, which act as a "no-op".
> > + *
> > + * @format: DRM_FORMAT_* value for which to obtain a conversion function
> > (see [drm_fourcc.h])
> > + * @encoding: DRM_COLOR_* value for which to obtain a conversion matrix
> > + * @range: DRM_COLOR_*_RANGE value for which to obtain a conversion matrix
> > + */
> > +struct conversion_matrix *
> > +get_conversion_matrix_to_argb_u16(u32 format, enum drm_color_encoding
> > encoding,
> > + enum drm_color_range range)
> > +{
> > + static struct conversion_matrix no_operation = {
> > + .matrix = {
> > + { 4294967296, 0, 0, },
> > + { 0, 4294967296, 0, },
> > + { 0, 0, 4294967296, },
> > + },
> > + .y_offset = 0,
> > + };
> > +
> > + /*
> > + * Those matrixies were generated using the colour python framework
>
> matrices
>
> > + *
> > + * Below are the function calls used to generate eac matrix, go to
>
> each
>
> > + *
> > https://colour.readthedocs.io/en/develop/generated/colour.matrix_YCbCr.html
> > + * for more info:
> > + *
> > + * numpy.around(colour.matrix_YCbCr(K=colour.WEIGHTS_YCBCR["ITU-R
> > BT.601"],
> > + * is_legal = False,
> > + * bits = 8) * 2**32).astype(int)
> > + */
>
> > +
> > /**
>
> Please convert this comment to kernel-doc format or just use "/*" to begin
> the comment.
>
> > * Retrieve the correct write_pixel function for a specific format.
> > * If the format is not supported by VKMS a warn is emitted and a dummy
> > "don't do anything"
>
> > diff --git a/drivers/gpu/drm/vkms/vkms_plane.c
> > b/drivers/gpu/drm/vkms/vkms_plane.c
> > index 8875bed76410..987dd2b686a8 100644
> > --- a/drivers/gpu/drm/vkms/vkms_plane.c
> > +++ b/drivers/gpu/drm/vkms/vkms_plane.c
>
>
> thanks.
> --
> #Randy
--
Louis Chauvet, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
