On 2015. 8. 19., at PM 11:52, Yakir Yang <y...@rock-chips.com> wrote: > > Some edp screen with no hpd signal would need some delay time > to ensure that screen would be ready for work, so we can expand > the delay time in hpd detect function, it works prefectly on my > rk3288 sdk board.
Then, this delay has a dependency on the "rk3288 sdk" board. Also, if the delay time is expanded, the booting time of some Exybos boards will be increased unnecessarily. :-( So, please add new DT property such as 'hpd-delay' that can be added to board DT files. If there is not that DT property in DT files, the default value '10' will written to a variable such as 'unsigned int hpd_delay'. If there is the DT property in DT files, the delay value will written to the variable when parsing DT values and will be used in analogix_dp_detect_hpd(). What I want to say is that there should not be harmful effect on the existing Exynos boards, due to unrelated reasons. Best regards, Jingoo Han > Signed-off-by: Yakir Yang <y...@rock-chips.com> > --- > Changes in v3: None > Changes in v2: None > > drivers/gpu/drm/bridge/analogix_dp_core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/bridge/analogix_dp_core.c > b/drivers/gpu/drm/bridge/analogix_dp_core.c > index 99870f7..75dd44a 100644 > --- a/drivers/gpu/drm/bridge/analogix_dp_core.c > +++ b/drivers/gpu/drm/bridge/analogix_dp_core.c > @@ -68,7 +68,7 @@ static int analogix_dp_detect_hpd(struct analogix_dp_device > *dp) > return 0; > > timeout_loop++; > - usleep_range(10, 11); > + usleep_range(100, 110); > } > > /* > -- > 1.9.1 > > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
