From e6b2627c6a8b25afc85649b54987b4bea27875b1 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Fri, 10 Oct 2014 17:53:33 +0300 Subject: [PATCH] drm/i915: spt does not have pch backlight override bit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit SPT is always in the PCH override mode, and the bit MBZ. Only set override on LPT. v2: check for PCH version (Ville) Signed-off-by: Jani Nikula Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_panel.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index e3def5ad4a77..e18b3f49074c 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -775,8 +775,9 @@ static void bdw_enable_backlight(struct intel_connector *connector) if (panel->backlight.active_low_pwm) pch_ctl1 |= BLM_PCH_POLARITY; - /* BDW always uses the pch pwm controls. */ - pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; + /* After LPT, override is the default. */ + if (HAS_PCH_LPT(dev_priv)) + pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); POSTING_READ(BLC_PWM_PCH_CTL1); -- GitLab