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drm/i915: WARN if power sequencer is not connected to the LVDS port on pre-ilk

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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 <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180518152931.13104-7-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2018-05-18 18:29:31 +03:00
parent 4c23dea48b
commit f0d2b758e0
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/i915/intel_display.c
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@ -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);
}