linux-kernel - Re: [Intel-gfx] screen freeze with 5.2-rc6 Dell XPS-13 skylake i915

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Message-ID: <595d9bc87bf47717c8675eb5b1a1cbb2bc463752.camel@tiscali.nl>
Date:   Mon, 15 Jul 2019 23:34:59 +0200
From:   Paul Bolle <pebolle@...cali.nl>
To:     "Souza, Jose" <jose.souza@...el.com>,
        "James.Bottomley@...senPartnership.com" 
        <James.Bottomley@...senPartnership.com>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "chris@...is-wilson.co.uk" <chris@...is-wilson.co.uk>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Intel-gfx] screen freeze with 5.2-rc6 Dell XPS-13 skylake i915

Hi Jose,

Souza, Jose schreef op ma 15-07-2019 om 21:03 [+0000]:
> So the issue did not happened again with the patch applied?

Not in the three days that I've been running 5.2 kernels with the hack applied
(so that should be about twelve hours of proper uptime).

> If you still have the kernel 5.1 installed could you share your
> /sys/kernel/debug/dri/0/i915_edp_psr_status with the older kernel?
> We want to check if training values changed between kernel versions.

Sure. On 5.1.17 I get:
    Sink support: yes [0x01]
    PSR mode: PSR1 enabled
    Source PSR ctl: enabled [0x81f00626]
    Source PSR status: IDLE [0x040b0001]
    Busy frontbuffer bits: 0x00000000

And, in case you need it, on 5.2.1+hack I get:
    Sink support: yes [0x01]
    PSR mode: PSR1 enabled
    Source PSR ctl: enabled [0x81f00626]
    Source PSR status: IDLE [0x04030006]
    Busy frontbuffer bits: 0x00000000

Hope this helps,


Paul