From: Thomas Zimmermann <tzimmermann@suse.de>
To: Javier Martinez Canillas <javierm@redhat.com>,
airlied@linux.ie, daniel@ffwll.ch, deller@gmx.de,
maxime@cerno.tech, sam@ravnborg.org, msuchanek@suse.de,
mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org,
geert@linux-m68k.org, mark.cave-ayland@ilande.co.uk
Cc: linux-fbdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
dri-devel@lists.freedesktop.org
Subject: Re: [PATCH v2 08/10] drm/ofdrm: Add CRTC state
Date: Wed, 21 Sep 2022 13:45:12 +0200 [thread overview]
Message-ID: <1946b9c3-f90d-a521-40e9-dfcde2b96950@suse.de> (raw)
In-Reply-To: <3fb4d471-2653-07a6-8fbd-f59da6c113e0@redhat.com>
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Hi
Am 26.07.22 um 15:36 schrieb Javier Martinez Canillas:
> On 7/20/22 16:27, Thomas Zimmermann wrote:
>> Add a dedicated CRTC state to ofdrm to later store information for
>> palette updates.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
>> ---
>> drivers/gpu/drm/tiny/ofdrm.c | 62 ++++++++++++++++++++++++++++++++++--
>>
>
> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
>
> [...]
>
>> +static void ofdrm_crtc_reset(struct drm_crtc *crtc)
>> +{
>> + struct ofdrm_crtc_state *ofdrm_crtc_state;
>> +
>> + if (crtc->state) {
>> + ofdrm_crtc_state_destroy(to_ofdrm_crtc_state(crtc->state));
>> + crtc->state = NULL; /* must be set to NULL here */
>> + }
>> +
>> + ofdrm_crtc_state = kzalloc(sizeof(*ofdrm_crtc_state), GFP_KERNEL);
>> + if (!ofdrm_crtc_state)
>> + return;
>> + __drm_atomic_helper_crtc_reset(crtc, &ofdrm_crtc_state->base);
>> +}
>> +
>
> IMO this function is hard to read, I would instead write it as following:
>
> static void ofdrm_crtc_reset(struct drm_crtc *crtc)
> {
> struct ofdrm_crtc_state *ofdrm_crtc_state = kzalloc(sizeof(*ofdrm_crtc_state), GFP_KERNEL);
>
> if (!ofdrm_crtc_state)
> return;
>
> if (crtc->state) {
> ofdrm_crtc_state_destroy(to_ofdrm_crtc_state(crtc->state));
> crtc->state = NULL; /* must be set to NULL here */
> }
>
> __drm_atomic_helper_crtc_reset(crtc, &ofdrm_crtc_state->base);
> }
>
> Also with that form I think that the crtc->state = NULL could just be dropped ?
I once had to add this line to a driver to make the DRM helpers work.
But I cannot find any longer why. Maybe it's been resolved meanwhile.
Best regards
Thomas
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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next prev parent reply other threads:[~2022-09-21 11:45 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-20 14:27 [PATCH v2 00/10] drm: Add driver for PowerPC OF displays Thomas Zimmermann
2022-07-20 14:27 ` [PATCH v2 01/10] drm/simpledrm: Remove mem field from device structure Thomas Zimmermann
2022-07-25 14:48 ` Javier Martinez Canillas
2022-07-20 14:27 ` [PATCH v2 02/10] drm/simpledrm: Inline device-init helpers Thomas Zimmermann
2022-07-25 15:01 ` Javier Martinez Canillas
2022-07-27 7:50 ` Thomas Zimmermann
2022-07-27 9:30 ` Javier Martinez Canillas
2022-07-20 14:27 ` [PATCH v2 03/10] drm/simpledrm: Remove pdev field from device structure Thomas Zimmermann
2022-07-25 15:02 ` Javier Martinez Canillas
2022-07-20 14:27 ` [PATCH v2 04/10] drm/simpledrm: Compute framebuffer stride if not set Thomas Zimmermann
2022-07-21 14:46 ` Geert Uytterhoeven
2022-07-25 15:13 ` Javier Martinez Canillas
2022-07-27 7:53 ` Thomas Zimmermann
2022-08-11 17:23 ` Daniel Vetter
2022-08-11 18:26 ` Thomas Zimmermann
2022-08-11 18:27 ` Thomas Zimmermann
2022-09-06 19:16 ` Daniel Vetter
2022-07-20 14:27 ` [PATCH v2 05/10] drm/simpledrm: Convert to atomic helpers Thomas Zimmermann
2022-07-25 15:46 ` Javier Martinez Canillas
2022-07-27 7:58 ` Thomas Zimmermann
2022-07-20 14:27 ` [PATCH v2 06/10] drm/simpledrm: Move some functionality into fwfb helper library Thomas Zimmermann
2022-07-25 16:23 ` Javier Martinez Canillas
2022-07-27 8:24 ` Thomas Zimmermann
2022-07-27 9:39 ` Javier Martinez Canillas
2022-07-20 14:27 ` [PATCH v2 07/10] drm/ofdrm: Add ofdrm for Open Firmware framebuffers Thomas Zimmermann
2022-07-26 13:17 ` Javier Martinez Canillas
2022-09-21 11:41 ` Thomas Zimmermann
2022-07-20 14:27 ` [PATCH v2 08/10] drm/ofdrm: Add CRTC state Thomas Zimmermann
2022-07-26 13:36 ` Javier Martinez Canillas
2022-09-21 11:45 ` Thomas Zimmermann [this message]
2022-07-20 14:27 ` [PATCH v2 09/10] drm/ofdrm: Add per-model device function Thomas Zimmermann
2022-07-26 13:38 ` Javier Martinez Canillas
2022-07-26 14:40 ` Michal Suchánek
2022-07-26 19:22 ` Javier Martinez Canillas
2022-07-27 8:33 ` Thomas Zimmermann
2022-08-05 0:22 ` Benjamin Herrenschmidt
2022-09-21 12:37 ` Thomas Zimmermann
2022-07-20 14:27 ` [PATCH v2 10/10] drm/ofdrm: Support color management Thomas Zimmermann
2022-07-26 13:49 ` Javier Martinez Canillas
2022-07-27 8:41 ` Thomas Zimmermann
2022-07-27 9:45 ` Javier Martinez Canillas
2022-08-05 0:29 ` Benjamin Herrenschmidt
2022-08-05 0:19 ` Benjamin Herrenschmidt
2022-09-21 12:55 ` Thomas Zimmermann
2022-09-21 16:48 ` Geert Uytterhoeven
2022-09-22 6:42 ` Thomas Zimmermann
2022-09-22 7:28 ` Maxime Ripard
2022-09-22 8:06 ` Thomas Zimmermann
2022-07-28 11:13 ` [PATCH v2 00/10] drm: Add driver for PowerPC OF displays Michael Ellerman
2022-07-28 11:31 ` Michal Suchánek
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