linux-kernel - Re: [PATCH] drm/panel: samsung-s6d7aa0: use pointer for drm

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Date:   Tue, 23 May 2023 14:46:32 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Artur Weber <aweber.kernel@...il.com>
Cc:     Nathan Chancellor <nathan@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>, thierry.reding@...il.com,
        David Airlie <airlied@...il.com>,
        Nikita Travkin <nikita@...n.ru>,
        Daniel Vetter <daniel@...ll.ch>, Tom Rix <trix@...hat.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH] drm/panel: samsung-s6d7aa0: use pointer for drm_mode in
 panel desc struct

On Tue, May 23, 2023 at 2:29 PM Nick Desaulniers
<ndesaulniers@...gle.com> wrote:
>
> On Tue, May 23, 2023 at 2:20 PM Artur Weber <aweber.kernel@...il.com> wrote:
> >
> > Fixes compilation errors on older GCC versions (before 8.x) and Clang
> > after changes introduced in commit 6810bb390282 ("drm/panel: Add
> > Samsung S6D7AA0 panel controller driver"). Tested with GCC 13.1.1,
> > GCC 6.4.0 and Clang 16.0.3.
>
> Hi Artur,
> Thanks for the patch! Mind sending a v2 with the diagnostic added to
> the commit message? This gives reviewers much more context as to what
> issue you are fixing.

Perhaps it was these errors:
https://lore.kernel.org/llvm/646c6def.a70a0220.58c1a.903d@mx.google.com/T/#u

?
If so, please add

Reported-by: kernelci.org bot <bot@...nelci.org>
Link: https://lore.kernel.org/llvm/646c6def.a70a0220.58c1a.903d@mx.google.com

To the v2 commit message as well.

>
> >
> > Signed-off-by: Artur Weber <aweber.kernel@...il.com>
> > ---
> >  drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c b/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
> > index f532aa018428..102e1fc7ee38 100644
> > --- a/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
> > +++ b/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
> > @@ -37,7 +37,7 @@ struct s6d7aa0_panel_desc {
> >         unsigned int panel_type;
> >         int (*init_func)(struct s6d7aa0 *ctx);
> >         int (*off_func)(struct s6d7aa0 *ctx);
> > -       const struct drm_display_mode drm_mode;
> > +       const struct drm_display_mode *drm_mode;
> >         unsigned long mode_flags;
> >         u32 bus_flags;
> >         bool has_backlight;
> > @@ -309,7 +309,7 @@ static const struct s6d7aa0_panel_desc s6d7aa0_lsl080al02_desc = {
> >         .panel_type = S6D7AA0_PANEL_LSL080AL02,
> >         .init_func = s6d7aa0_lsl080al02_init,
> >         .off_func = s6d7aa0_lsl080al02_off,
> > -       .drm_mode = s6d7aa0_lsl080al02_mode,
> > +       .drm_mode = &s6d7aa0_lsl080al02_mode,
> >         .mode_flags = MIPI_DSI_MODE_VSYNC_FLUSH | MIPI_DSI_MODE_VIDEO_NO_HFP,
> >         .bus_flags = DRM_BUS_FLAG_DE_HIGH,
> >
> > @@ -412,7 +412,7 @@ static const struct s6d7aa0_panel_desc s6d7aa0_lsl080al03_desc = {
> >         .panel_type = S6D7AA0_PANEL_LSL080AL03,
> >         .init_func = s6d7aa0_lsl080al03_init,
> >         .off_func = s6d7aa0_lsl080al03_off,
> > -       .drm_mode = s6d7aa0_lsl080al03_mode,
> > +       .drm_mode = &s6d7aa0_lsl080al03_mode,
> >         .mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET,
> >         .bus_flags = 0,
> >
> > @@ -440,7 +440,7 @@ static const struct s6d7aa0_panel_desc s6d7aa0_ltl101at01_desc = {
> >         .panel_type = S6D7AA0_PANEL_LTL101AT01,
> >         .init_func = s6d7aa0_lsl080al03_init, /* Similar init to LSL080AL03 */
> >         .off_func = s6d7aa0_lsl080al03_off,
> > -       .drm_mode = s6d7aa0_ltl101at01_mode,
> > +       .drm_mode = &s6d7aa0_ltl101at01_mode,
> >         .mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET,
> >         .bus_flags = 0,
> >
> > @@ -458,7 +458,7 @@ static int s6d7aa0_get_modes(struct drm_panel *panel,
> >         if (!ctx)
> >                 return -EINVAL;
> >
> > -       mode = drm_mode_duplicate(connector->dev, &ctx->desc->drm_mode);
> > +       mode = drm_mode_duplicate(connector->dev, ctx->desc->drm_mode);
> >         if (!mode)
> >                 return -ENOMEM;
> >
> >
> > base-commit: 37cee4876a45a5c3da79a83d34ed4f3c68548aef
> > --
> > 2.40.1
> >
>
>
> --
> Thanks,
> ~Nick Desaulniers



-- 
Thanks,
~Nick Desaulniers