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| author | James Ausmus <james.ausmus@intel.com> | 2017-12-01 05:17:00 +0300 |
|---|---|---|
| committer | Joonas Lahtinen <joonas.lahtinen@linux.intel.com> | 2017-12-05 17:56:41 +0300 |
| commit | 46442beed972d439210580739bc006713375c5b4 (patch) | |
| tree | b1ba40eefdad7f5de70072c9391cec5d9d6463dc /drivers/s390 | |
| parent | a87e55f89f0b0dc541d89248a8445635936a3858 (diff) | |
| download | linux-46442beed972d439210580739bc006713375c5b4.tar.xz | |
drm/i915/cnl: Mask previous DDI - PLL mapping
Without masking out the old value, we can end up pointing the DDI to a
disabled PLL, which makes the system fall over. Mask out the previous
value before setting the PLL to DDI mapping.
This can be observed by running igt/testdisplay with both an eDP and
HDMI/DP output active.
v2: Add the Bugzilla link
Fixes: 555e38d273172 ("drm/i915/cnl: DDI - PLL mapping")
Testcase: igt/testdisplay
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103997
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: James Ausmus <james.ausmus@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Tested-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171201021700.13504-1-james.ausmus@intel.com
(cherry picked from commit 23a7068ec581fcc6fb61039448632d25987b1fae)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/s390')
0 files changed, 0 insertions, 0 deletions