> On 26/10/24 - 12:22, Maíra Canal wrote: > > Hi Louis, > > > > On 10/10/24 14:27, Louis Chauvet wrote: > > > VKMS currently supports only one CRTC, so it make no sense to have this > > > index configurable. To avoid issues, replace this hardcoded index by > > > drm_crtc_mask when applicable. > > > > > > There is no need to manually set a crtc mask on primary and cursor plane > > > as it is automatically set by drmm_crtc_alloc_with_planes. > > > > > > In addition, this will remove the use of an uninitialized structure in > > > vkms_add_overlay_plane. This currently works by chance because two things: > > > - vkms_plane_init always set a possible_crtcs value, so the problematic > > > branch is never used; > > > - drm_crtc_mask on an kzalloc'd drm_crtc returns BIT(0), and the VKMS CRTC > > > always have this id. > > > > > > Signed-off-by: Louis Chauvet <louis.chauvet@xxxxxxxxxxx> > > > --- > > > Changes in v2: > > > - Applied comments from José > > > - Link to v1: https://lore.kernel.org/r/20240906-vkms-remove-index-v1-1-3cfedd8ccb2f@xxxxxxxxxxx > > > --- > > > drivers/gpu/drm/vkms/vkms_drv.c | 2 +- > > > drivers/gpu/drm/vkms/vkms_drv.h | 8 ++---- > > > drivers/gpu/drm/vkms/vkms_output.c | 54 ++++++++++++++------------------------ > > > drivers/gpu/drm/vkms/vkms_plane.c | 4 +-- > > > 4 files changed, 24 insertions(+), 44 deletions(-) > > > > > > diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c > > > index 2d1e95cb66e5..0f6805b9fe7b 100644 > > > --- a/drivers/gpu/drm/vkms/vkms_drv.c > > > +++ b/drivers/gpu/drm/vkms/vkms_drv.c > > > @@ -174,7 +174,7 @@ static int vkms_modeset_init(struct vkms_device *vkmsdev) > > > dev->mode_config.preferred_depth = 0; > > > dev->mode_config.helper_private = &vkms_mode_config_helpers; > > > - return vkms_output_init(vkmsdev, 0); > > > + return vkms_output_init(vkmsdev); > > > } > > > static int vkms_create(struct vkms_config *config) > > > diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h > > > index 672fe191e239..036101ee4ea1 100644 > > > --- a/drivers/gpu/drm/vkms/vkms_drv.h > > > +++ b/drivers/gpu/drm/vkms/vkms_drv.h > > > @@ -212,21 +212,17 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc, > > > * vkms_output_init() - Initialize all sub-components needed for a VKMS device. > > > * > > > * @vkmsdev: VKMS device to initialize > > > - * @index: CRTC which can be attached to the planes. The caller must ensure that > > > - * @index is positive and less or equals to 31. > > > */ > > > -int vkms_output_init(struct vkms_device *vkmsdev, int index); > > > +int vkms_output_init(struct vkms_device *vkmsdev); > > > /** > > > * vkms_plane_init() - Initialize a plane > > > * > > > * @vkmsdev: VKMS device containing the plane > > > * @type: type of plane to initialize > > > - * @index: CRTC which can be attached to the plane. The caller must ensure that > > > - * @index is positive and less or equals to 31. > > > */ > > > struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, > > > - enum drm_plane_type type, int index); > > > + enum drm_plane_type type); > > > /* CRC Support */ > > > const char *const *vkms_get_crc_sources(struct drm_crtc *crtc, > > > diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c > > > index 0a5a185aa0b0..5128aa3b2eb6 100644 > > > --- a/drivers/gpu/drm/vkms/vkms_output.c > > > +++ b/drivers/gpu/drm/vkms/vkms_output.c > > > @@ -32,29 +32,14 @@ static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = { > > > .get_modes = vkms_conn_get_modes, > > > }; > > > -static int vkms_add_overlay_plane(struct vkms_device *vkmsdev, int index, > > > - struct drm_crtc *crtc) > > > -{ > > > - struct vkms_plane *overlay; > > > - > > > - overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index); > > > - if (IS_ERR(overlay)) > > > - return PTR_ERR(overlay); > > > - > > > - if (!overlay->base.possible_crtcs) > > > - overlay->base.possible_crtcs = drm_crtc_mask(crtc); > > > - > > > - return 0; > > > -} > > > - > > > -int vkms_output_init(struct vkms_device *vkmsdev, int index) > > > +int vkms_output_init(struct vkms_device *vkmsdev) > > > { > > > struct vkms_output *output = &vkmsdev->output; > > > struct drm_device *dev = &vkmsdev->drm; > > > struct drm_connector *connector = &output->connector; > > > struct drm_encoder *encoder = &output->encoder; > > > struct drm_crtc *crtc = &output->crtc; > > > - struct vkms_plane *primary, *cursor = NULL; > > > + struct vkms_plane *primary, *overlay, *cursor = NULL; > > > int ret; > > > int writeback; > > > unsigned int n; > > > @@ -65,34 +50,37 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index) > > > * The overlay and cursor planes are not mandatory, but can be used to perform complex > > > * composition. > > > */ > > > - primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index); > > > + primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY); > > > if (IS_ERR(primary)) > > > return PTR_ERR(primary); > > > - if (vkmsdev->config->overlay) { > > > - for (n = 0; n < NUM_OVERLAY_PLANES; n++) { > > > - ret = vkms_add_overlay_plane(vkmsdev, index, crtc); > > > - if (ret) > > > - return ret; > > > - } > > > - } > > > - > > > if (vkmsdev->config->cursor) { > > > - cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index); > > > + cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR); > > > if (IS_ERR(cursor)) > > > return PTR_ERR(cursor); > > > } > > > - /* [1]: Allocation of a CRTC, its index will be BIT(0) = 1 */ > > > ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base); > > > if (ret) > > > return ret; > > > + if (vkmsdev->config->overlay) { > > > + for (n = 0; n < NUM_OVERLAY_PLANES; n++) { > > > + overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY); > > > + if (IS_ERR(overlay)) { > > > + DRM_DEV_ERROR(dev->dev, "Failed to init vkms plane\n"); > > > + ret = PTR_ERR(overlay); > > > + goto err_crtc; > > > + } > > > + overlay->base.possible_crtcs = drm_crtc_mask(crtc); > > > + } > > > + } > > > + > > > ret = drm_connector_init(dev, connector, &vkms_connector_funcs, > > > DRM_MODE_CONNECTOR_VIRTUAL); > > > if (ret) { > > > DRM_ERROR("Failed to init connector\n"); > > > - goto err_connector; > > > + goto err_crtc; > > > } > > > drm_connector_helper_add(connector, &vkms_conn_helper_funcs); > > > @@ -103,11 +91,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index) > > > DRM_ERROR("Failed to init encoder\n"); > > > goto err_encoder; > > > } > > > - /* > > > - * This is a hardcoded value to select crtc for the encoder. > > > - * BIT(0) here designate the first registered CRTC, the one allocated in [1] > > > - */ > > > - encoder->possible_crtcs = BIT(0); > > > + encoder->possible_crtcs = drm_crtc_mask(crtc); > > > ret = drm_connector_attach_encoder(connector, encoder); > > > if (ret) { > > > @@ -131,7 +115,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index) > > > err_encoder: > > > drm_connector_cleanup(connector); > > > -err_connector: > > > +err_crtc: > > > drm_crtc_cleanup(crtc); > > > > Do we really need `drm_crtc_cleanup`? We are allocating the CRTC with > > `drmm_crtc_init_with_planes`. > > I agree, I'll check the previous discussions I've had on the mailing list, > I have a little doubt that someone asked me to re-add this cleaning at > some point. Oh! Good point. It looks like drm_crtc_cleanup() is a leftover from commit 99cc528ebe92 ("drm/vkms: Use drmm_crtc_init_with_planes()"). Since the previous code in vkms_output.c was calling drm_crtc_cleanup() I assumed it was required. But Maíra is right, it is safe to drop it. I sent a simple patch dropping the call to drm_crtc_cleanup(): https://lore.kernel.org/dri-devel/20241031183835.3633-1-jose.exposito89@xxxxxxxxx/T/#u About this patch, LGTM. Jose > Thanks, > Louis Chauvet > > > The rest looks fine to me. > > > > Best Regards, > > - Maíra > > > > > return ret; > > > diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c > > > index e5c625ab8e3e..ad137c9a75f5 100644 > > > --- a/drivers/gpu/drm/vkms/vkms_plane.c > > > +++ b/drivers/gpu/drm/vkms/vkms_plane.c > > > @@ -198,12 +198,12 @@ static const struct drm_plane_helper_funcs vkms_plane_helper_funcs = { > > > }; > > > struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, > > > - enum drm_plane_type type, int index) > > > + enum drm_plane_type type) > > > { > > > struct drm_device *dev = &vkmsdev->drm; > > > struct vkms_plane *plane; > > > - plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index, > > > + plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 0, > > > &vkms_plane_funcs, > > > vkms_formats, ARRAY_SIZE(vkms_formats), > > > NULL, type, NULL); > > > > > > --- > > > base-commit: 33c255312660653cf54f8019896b5dca28e3c580 > > > change-id: 20240906-vkms-remove-index-3a6e04c38e02 > > > > > > Best regards,
