From: Satadru Pramanik <satadru@gmail.com>
To: intel-gfx@lists.freedesktop.org
Subject: [Intel-gfx] [RFC PATCH 0/1] Remove DPCD Aux Backlight Control PWM_PIN check
Date: Wed, 23 Sep 2020 18:13:11 -0400 [thread overview]
Message-ID: <20200923221312.2418628-1-satadru@gmail.com> (raw)
The Google Pixel Slate/Nocturne device uses a DPCD backlight
which requires Aux Backlight Control to be enabled. This is
enabled in the ChromeOS kernel trees via disabling the PWM_PIN
check and also an extended heuristic, which was upstreamed
in 2017, but reverted shortly thereafter due to a regression
on a Thinkpad X1 Carbon 4th Gen as per
https://bugs.freedesktop.org/show_bug.cgi?id=101619
I'm hoping that there is a way to remove that check and not
cause problems for other machines, as otherwise the backlight
is nonfunctional for nocturne, (and possibly for other related
machines such as the eve Pixelbook as well.)
Satadru Pramanik (1):
Remove DPCD Aux Backlight Control PWM_PIN check
drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--
2.27.0
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next reply other threads:[~2020-09-23 22:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-23 22:13 Satadru Pramanik [this message]
2020-09-23 22:13 ` [Intel-gfx] [RFC PATCH 1/1] Remove DPCD Aux Backlight Control PWM_PIN check Satadru Pramanik
2020-09-23 22:52 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
2020-09-24 1:58 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
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