Hi Thierry,
On Tue, 23 Sep 2014 16:04:40 +0200
Thierry Reding <thierry.reding@xxxxxxxxx> wrote:
> On Tue, Jul 22, 2014 at 02:23:45PM +0200, Boris BREZILLON wrote:
> > Add bus_formats and nbus_formats fields and
> > drm_display_info_set_bus_formats helper function to specify the bus
> > formats supported by a given display.
> >
> > This information can be used by display controller drivers to configure
> > the output interface appropriately (i.e. RGB565, RGB666 or RGB888 on raw
> > RGB or LVDS busses).
> >
> > Signed-off-by: Boris BREZILLON <boris.brezillon@xxxxxxxxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/drm_crtc.c | 28 ++++++++++++++++++++++++++++
> > include/drm/drm_crtc.h | 8 ++++++++
> > 2 files changed, 36 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> > index c808a09..50c8395 100644
> > --- a/drivers/gpu/drm/drm_crtc.c
> > +++ b/drivers/gpu/drm/drm_crtc.c
> > @@ -825,6 +825,34 @@ static void drm_mode_remove(struct drm_connector *connector,
> > drm_mode_destroy(connector->dev, mode);
> > }
> >
> > +/*
> > + * drm_display_info_set_bus_formats - set the supported bus formats
> > + * @info: display info to store bus formats in
> > + * @fmts: array containing the supported bus formats
> > + * @nfmts: the number of entries in the fmts array
> > + *
> > + * Store the suppported bus formats in display info structure.
> > + */
> > +int drm_display_info_set_bus_formats(struct drm_display_info *info,
> > + const enum video_bus_format *fmts,
> > + int nfmts)
>
> Can you make nfmts unsigned please?
Sure.
>
> > +{
> > + enum video_bus_format *formats = NULL;
> > +
> > + if (fmts && nfmts) {
> > + formats = kmemdup(fmts, sizeof(*fmts) * nfmts, GFP_KERNEL);
> > + if (!formats)
> > + return -ENOMEM;
> > + }
> > +
> > + kfree(info->bus_formats);
> > + info->bus_formats = formats;
> > + info->nbus_formats = formats ? nfmts : 0;
>
> And perhaps check for formats == NULL && nfmts != 0 since that's not a
> valid pair of values. Then you can simply assign this directly without
> relying on the value of formats.
>
> Also other variable names use "num_" as a prefix instead of "n", so if
> you're going to respin anyway might as well make the names more
> consistent.
I'll rename the field and variable and add the proper check before
assigning values.
Thanks for your review.
Best Regards,
Boris
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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