Re: [PATCH v9 1/4] drm/msm/dp: Add eDP support via aux_bus

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On 25/04/2022 23:26, Stephen Boyd wrote:
Quoting Sankeerth Billakanti (QUIC) (2022-04-25 02:39:43)
Hi Stephen,

Quoting Sankeerth Billakanti (2022-04-22 02:11:03)
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
b/drivers/gpu/drm/msm/dp/dp_display.c
index d7a19d6..055681a 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c

Some nitpicks

Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>

@@ -1508,7 +1509,8 @@ void msm_dp_irq_postinstall(struct msm_dp
*dp_display)

         dp_hpd_event_setup(dp);

-       dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
+       if (!dp_display->is_edp)
+               dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);

Did it turn out that in fact DP isn't ready still to setup even after delaying the
irq?


The host_init, config_hpd, phy_init and enable_irq are happening in modeset_init already for eDP.
So, I am not scheduling the EV_HPD_INIT_SETUP event for eDP. I am not modifying the delay for DP.

Cool. That didn't answer my question though. Why does DP still need the
delay? I thought recent changes made it unnecessary.

I'd say that if it is not necessary, it should be changed in the separate commit. The question is valid nevertheless.


--
With best wishes
Dmitry



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