Hi Sam Am 07.03.20 um 21:08 schrieb Sam Ravnborg: > Hi Thomas. > > On Fri, Mar 06, 2020 at 04:18:52PM +0100, Thomas Zimmermann wrote: >> Hi Laurent >> >> Am 06.03.20 um 15:22 schrieb Laurent Pinchart: >>> Hi Thomas, >>> >>> Thank you for the patch. >>> >>> On Thu, Mar 05, 2020 at 04:59:28PM +0100, Thomas Zimmermann wrote: >>>> A call to drm_simple_encoder_init() initializes an encoder without >>>> further functionality. It only provides the destroy callback to >>>> cleanup the encoder's state. Only few drivers implement more >>>> sophisticated encoders than that. Most drivers implement such a >>>> simple encoder and can use drm_simple_encoder_init() instead. >>>> >>>> The patchset converts drivers where the encoder's instance is >>>> embedded in a larger data structure. The driver releases the >>>> memory during cleanup. Each patch replaces drm_encoder_init() with >>>> drm_simple_encoder_init() and removes the (now unused) driver's >>>> encoder functions. >>>> >>>> While the patchset is fairly large, the indiviual patches are self- >>>> contained and can be merged independently from each other. The >>>> simple-encoder functionality is currently in drm-misc-next, where >>>> these patches could go as well. >>> >>> I've reviewed the whole series, including verifying that the few >>> instances of struct drm_encoder_funcs that were not declared const were >>> not modified somewhere to add more function pointers. >>> >>> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> >> >> Thanks for the detailed review. >> >>> >>> for all the patches. >>> >>> However, I'd like to note that drm_simple_encoder_init() is a bit of a >>> misnommer here. Several of the encoders in those drivers to implement >>> additional functionality. They just expose them through >>> drm_encoder_helper_funcs, not drm_encoder_funcs. >> >> True. It's called 'simple encoder' for the lack of a better name. It's >> part of the simple KMS helpers, so the name's at least consistent. OTOH >> I always find drm_simple_display_pipe a bad name. >> >> We can still rename the simple-encoder function without much effort. I'm >> open for suggestions. > > IMO this does not belong in drm_simple_kms - but in drm_encoder. > This only occurs to me after looking a bit more on the patches, > you would have loved to get this feedback earlier. Well, the simple-encoder functionality used to be located in the encoder code, but Daniel mentioned this is more of a helper and asked me to move it out of the core. [1] So it ended up with the simple-KMS helpers. Best regards Thomas [1] https://patchwork.freedesktop.org/patch/352370/?series=73130&rev=1 > > Most users do not need their owm drm_encoder_funcs definition, > and would be happy with the default as provided by drm_simple_* > > As the cleanup is handled automatically when the drm device > is teared down (in mode_config_rest()) I considered if we could here > use the drmm_ namespace - but that felt wrong. > > My proposal is the following: > - Move the implementation to drm_encoder.c > - Name it drm_encoder_init_nofuncs() > > The patches posted in this thread would be a little simpler > as they would loose the added include file. > And the three drivers using the current infrastructure would need a > small update. > > I you decide to keep the current approach where the > functions are in drm_simple_* then the full series is: > Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx> > > But I think moving it to drm_encoder.c would be the approach that would > make it simpler to understand/follow. So that get my (biased) vote. > > Sam > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel > -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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