From f0d2b758e05e209f4572182afade180cda22c9c8 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Fri, 18 May 2018 18:29:31 +0300 Subject: [PATCH] drm/i915: WARN if power sequencer is not connected to the LVDS port on pre-ilk MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit We don't support using the power sequencer with other ports besides LVDS on pre-ilk platforms. WARN if someone has mistakenly connected the power sequencer to the wrong port. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20180518152931.13104-7-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- drivers/gpu/drm/i915/intel_display.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3a0709a6e4a0b..aab1c6c58edf6 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1236,7 +1236,12 @@ void assert_panel_unlocked(struct drm_i915_private *dev_priv, enum pipe pipe) pp_reg = PP_CONTROL(pipe); panel_pipe = pipe; } else { + u32 port_sel; + pp_reg = PP_CONTROL(0); + port_sel = I915_READ(PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK; + + WARN_ON(port_sel != PANEL_PORT_SELECT_LVDS); intel_lvds_port_enabled(dev_priv, LVDS, &panel_pipe); } -- 2.30.2