From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Fri, 18 May 2018 18:29:31 +0300
Subject: drm/i915: WARN if power sequencer is not connected to the LVDS port
on pre-ilk
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Git-commit: f0d2b758e05e209f4572182afade180cda22c9c8
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/intel_display.c | 5 +++++
1 file changed, 5 insertions(+)
--- 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_i9
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);
}