drm/i915: document PCH_NOP

There's a difference between PCH_NONE and PCH_NOP: the former means we
don't have a PCH while in the latter we do, but it doesn't have the
south display.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180608123330.31003-3-jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c4073666f1ca916bf9881a5d2665d1210c1b39cc..71651ca7a8b1bf5bfa8f695b6dd1bc6ec626d160 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -632,7 +632,7 @@ enum intel_pch {
        PCH_KBP,        /* Kaby Lake PCH */
        PCH_CNP,        /* Cannon Lake PCH */
        PCH_ICP,        /* Ice Lake PCH */
-       PCH_NOP,
+       PCH_NOP,        /* PCH without south display */
 };
 
 enum intel_sbi_destination {