Re: [PATCH] drm/i915: i915.disable_pch_pwm overrides PCH_PWM_ENABLE quirk

On Tue, Sep 3, 2013 at 7:37 PM, Kamal Mostafa kamal@canonical.com wrote:

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=47941

Some BIOS configurations of Dell XPS13 are adversely affected by e85843b ("drm/i915: quirk no PCH_PWM_ENABLE for Dell XPS13 backlight") so provide a boot param to inhibit the quirk, or force it on.

i915.disable_pch_pwm can be set to -1: auto (default; allows the disabling of pch_pwm by dmi quirk table match) 0: inhibits the disabling of pch_pwm (overrides dmi quirk table match) 1: forces the disabling of pch_pwm

Signed-off-by: Kamal Mostafa kamal@canonical.com

Nack. Piling quirk over quirk isn't the right approach and I think I should just revert the pch_pwm enable quirk again. -Daniel