linux-kernel - Re: [PATCH v4] drm/ssd130x: Store the HW buffer in the driver-private CRTC state

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Date:   Thu, 14 Sep 2023 15:23:53 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Maxime Ripard <mripard@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v4] drm/ssd130x: Store the HW buffer in the
 driver-private CRTC state

Maxime Ripard <mripard@...nel.org> writes:

Hello Maxime,

> Hi,
>
> On Wed, Sep 13, 2023 at 07:29:25AM +0200, Javier Martinez Canillas wrote:
>>  static const struct drm_crtc_helper_funcs ssd130x_crtc_helper_funcs = {
>>  	.mode_valid = ssd130x_crtc_helper_mode_valid,
>> -	.atomic_check = drm_crtc_helper_atomic_check,
>> +	.atomic_check = ssd130x_crtc_helper_atomic_check,
>>  };
>
> Sorry I didn't catch that sooner, but there's no reason to call that
> function a helper.
>

Yeah, agreed that there's no reason but others drivers already add the
_helper prefix for struct drm_*_helper_funcs callbacks, and I did that
in this driver as well to follow (what appears to be?) a convention.

So I've to that now for the struct drm_crtc_helper_funcs handlers to be
consistent with the rest of the driver, e.g for plane:

static const struct drm_plane_helper_funcs ssd130x_primary_plane_helper_funcs = {
	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
	.atomic_check = ssd130x_primary_plane_helper_atomic_check,
	.atomic_update = ssd130x_primary_plane_helper_atomic_update,
	.atomic_disable = ssd130x_primary_plane_helper_atomic_disable,
};

static const struct drm_plane_funcs ssd130x_primary_plane_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.reset = ssd130x_primary_plane_reset,
	.atomic_duplicate_state = ssd130x_primary_plane_duplicate_state,
	.atomic_destroy_state = ssd130x_primary_plane_destroy_state,
	.destroy = drm_plane_cleanup,
};

> With that fixed (and feel free to fix while applying)
>
> Acked-by: Maxime Ripard <mripard@...nel.org>
>
> Maxime

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat