Hi, Am Mittwoch, 7. Februar 2018, 18:53:09 CET schrieb Enric Balletbo i Serra: > From: Jeffy Chen <jeffy.chen@xxxxxxxxxxxxxx> > > Since we are trying to access components' resources in the master's > suspend/resume PM callbacks(e.g. panel), add device links to correct > the suspend/resume and shutdown ordering. > > Signed-off-by: Jeffy Chen <jeffy.chen@xxxxxxxxxxxxxx> > Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> looks good to me right now. So if anybody else wants to apply it, Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx> @Sean: does this address the issue you saw with the previous version? It looks like it, but I'd like to make sure before I apply it to drm-misc myself :-) Thanks Heiko > --- > Hi, > > This is an attempt to revive a patch [1] that was sent last October. Sean > Paul requested some changes but I think that never was send a v5 version. > The patch fixes and issue where backlight panel is not correctly recoved > after a resume. This was tested on top of current linux-next plus the > latest series of Thierry's patches [2] > > [1] https://patchwork.kernel.org/patch/10011595/ > [2] https://lkml.org/lkml/2018/1/30/621 > > Changes in v5: > Address the comments from Sean. > - Create a helper to do the cleanup. > - Call the helper in rockchip_drm_match_add and where needed. > Changes in v4: None > Changes in v3: None > Changes in v2: > Use device link to correct the suspend/resume and shutdown ordering, > instead of converting rockchip spi's suspend/resume PM callbacks to > late suspend/resume PM callbacks. > > Thanks, > Enric > > drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 23 ++++++++++++++++++++++- > 1 file changed, 22 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c > index 0609113d6a71..f814d37b1db2 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c > @@ -314,6 +314,14 @@ static int compare_dev(struct device *dev, void *data) > return dev == (struct device *)data; > } > > +static void rockchip_drm_match_remove(struct device *dev) > +{ > + struct device_link *link; > + > + list_for_each_entry(link, &dev->links.consumers, s_node) > + device_link_del(link); > +} > + > static struct component_match *rockchip_drm_match_add(struct device *dev) > { > struct component_match *match = NULL; > @@ -331,10 +339,15 @@ static struct component_match *rockchip_drm_match_add(struct device *dev) > > if (!d) > break; > + > + device_link_add(dev, d, DL_FLAG_STATELESS); > component_match_add(dev, &match, compare_dev, d); > } while (true); > } > > + if (IS_ERR(match)) > + rockchip_drm_match_remove(dev); > + > return match ?: ERR_PTR(-ENODEV); > } > > @@ -411,13 +424,21 @@ static int rockchip_drm_platform_probe(struct platform_device *pdev) > if (IS_ERR(match)) > return PTR_ERR(match); > > - return component_master_add_with_match(dev, &rockchip_drm_ops, match); > + ret = component_master_add_with_match(dev, &rockchip_drm_ops, match); > + if (ret < 0) { > + rockchip_drm_match_remove(dev); > + return ret; > + } > + > + return 0; > } > > static int rockchip_drm_platform_remove(struct platform_device *pdev) > { > component_master_del(&pdev->dev, &rockchip_drm_ops); > > + rockchip_drm_match_remove(&pdev->dev); > + > return 0; > } > > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
