Messages in this thread | | | Date | Sat, 22 Feb 2020 22:27:13 +0100 | From | Sam Ravnborg <> | Subject | Re: [PATCH RFC v3 2/6] drm/sprd: add Unisoc's drm kms master |
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Hi Kevin/tang.
Thanks for the quick and detailed feedback. Your questions are addressed below.
Sam
> > > +static int sprd_drm_bind(struct device *dev) > > > +{ > > > + struct drm_device *drm; > > > + struct sprd_drm *sprd; > > > + int err; > > > + > > > + drm = drm_dev_alloc(&sprd_drm_drv, dev); > > > + if (IS_ERR(drm)) > > > + return PTR_ERR(drm); > > You should embed drm_device in struct sprd_drm. > > See example code in drm/drm_drv.c > > > > This is what modern drm drivers do. > > > > I *think* you can drop the component framework if you do this. > > > I have read it(drm/drm_drv.c) carefully, if drop the component framework, > the whole our drm driver maybe need to redesign, so i still want to keep > current design. OK, fine.
> > > + sprd_drm_mode_config_init(drm); > > > + > > > + /* bind and init sub drivers */ > > > + err = component_bind_all(drm->dev, drm); > > > + if (err) { > > > + DRM_ERROR("failed to bind all component.\n"); > > > + goto err_dc_cleanup; > > > + } > > When you have a drm_device - which you do here. > > Then please use drm_err() and friends for error messages. > > Please verify all uses of DRM_XXX > > > modern drm drivers need drm_xxx to replace DRM_XXX? Yes, use of DRM_XXX is deprecated - when you have a drm_device.
> > > > > + /* with irq_enabled = true, we can use the vblank feature. */ > > > + drm->irq_enabled = true; > > I cannot see any irq being installed. This looks wrong. > > > Our display controller isr is been register on crtc driver(sprd_dpu.c), not > here.
I think you just need to move this to next patch and then it is fine.
Sam
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