drm/i915/cnl: Fix RMW on ddi vswing sequence.
authorRodrigo Vivi <rodrigo.vivi@intel.com>
Mon, 19 Jun 2017 18:39:32 +0000 (11:39 -0700)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Mon, 26 Jun 2017 08:38:34 +0000 (10:38 +0200)
commit33b92c1e1f27078c83920fe2f38144f97536e248
treeb655a8573959364c934af287fdc8c082c6344247
parent047b8e21e3bfa9faa4ed9a0c337fe0c687710251
drm/i915/cnl: Fix RMW on ddi vswing sequence.

Paulo noticed that we were missing few bits clear
before writing values back to the register on
these RMW MMIO operations.

v2: Remove "POST_" from CURSOR_COEFF_MASK. (Paulo).
v3: Remove unnecessary braces. (Jani).

Fixes: cf54ca8bc567 ("drm/i915/cnl: Implement voltage swing sequence.")
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1497897572-22520-1-git-send-email-rodrigo.vivi@intel.com
(cherry picked from commit 1f588aeb60b4412019546ce596f179635abc2ac3)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_reg.h
drivers/gpu/drm/i915/intel_ddi.c