On 21.03.2017 11:53, Thierry Reding wrote: > On Tue, Mar 21, 2017 at 11:42:21AM +0100, Andrzej Hajda wrote: >> On 21.03.2017 11:20, Daniel Vetter wrote: >>> On Tue, Mar 21, 2017 at 10:58:43AM +0100, Andrzej Hajda wrote: >>>> On 21.03.2017 09:13, Thierry Reding wrote: >>>>> From: Thierry Reding <treding@xxxxxxxxxx> >>>>> >>>>> The FB helper core now supports deferred setup, so the driver's custom >>>>> implementation can be removed. >>>>> >>>>> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx> >>>>> --- >>>>> drivers/gpu/drm/exynos/exynos_drm_drv.c | 6 ++++-- >>>>> drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 2 -- >>>>> 2 files changed, 4 insertions(+), 4 deletions(-) >>>>> >>>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c >>>>> index 09d3c4c3c858..c5a37dda8d1b 100644 >>>>> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c >>>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c >>>>> @@ -399,8 +399,9 @@ static int exynos_drm_bind(struct device *dev) >>>>> /* init kms poll for handling hpd */ >>>>> drm_kms_helper_poll_init(drm); >>>>> >>>>> - /* force connectors detection */ >>>>> - drm_helper_hpd_irq_event(drm); >>>>> + ret = exynos_drm_fbdev_init(dev); >>>>> + if (ret) >>>>> + goto err_cleanup_poll; >>>> It should be rather: >>>> ret = exynos_drm_fbdev_init(drm); >>>> >>>> Even with this change it does not work, I will try to track down the >>>> problem. >> The solution was to remove custom equivalent of >> drm_fb_helper_maybe_connected - exynos_drm_fbdev_is_anything_connected, >> it is called earlier and it was a part of custom deferred fbdev. > Cool, thanks for figuring that out. I can add that to this patch for v4. > >>> We might need the multi-stage fbdev setup here, i.e. init fbdev, run >>> hpd_irq_event() (I suspect that kicks all the connectors to start >>> probing), then initial_config for fbdev. >>> >>> Probably simplest way to achieve this is to keep the hpd_irq_event call, >>> but place it _after_ the fbdev_init. >>> -Daniel >> I wonder if it wouldn't be sufficient to check if there is anything >> connected, instead of checking if there is anything not-disconnected, in >> drm_fb_helper_maybe_connected. > My recollection is that this had been discussed when I first sent this > out. VGA outputs are somewhat of a special case in that you can't always > properly detect that it's connected or not. So effectively we need to > take into account the connector_status_unknown. There's also some more > information about this in the kerneldoc for enum drm_connector_status. OK, I forgot about it and assumed that it is only used for initial state of connector. Returning to Daniel's proposition about hpd_irq_event(), it seems unnecessary then: before calling drm_fb_helper_maybe_connected drm_fb_helper_probe_connector_modes is called, which calls fill_modes callback which should perform connector probing anyway, am I right? Regards Andrzej > > Thierry _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
