diff options
| author | Navare, Manasi D <manasi.d.navare@intel.com> | 2017-07-17 15:05:22 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-07-27 22:07:22 +0200 |
| commit | 5846a73f26a1efa45e2c2edd36aa2ed0a6ad380a (patch) | |
| tree | b2354e36b469f8400d1fc5c78fb7bfec9978e7aa /drivers/gpu/drm/i915 | |
| parent | 283d6860d64f5091565bf729b0a6d6af14ae6c27 (diff) | |
drm/i915/cnl: Fix loadgen select programming on ddi vswing sequence
The condition for setting the Loadgen Select bit of
PORT_TX_DW4 register during DDI Vswing Sequence should be
Bit rate <=6 GHz whereas the existing code checks only
Bit Rate < 6GHz. This patch fixes this condition.
While at it also remove the redundant paranthesis.
Fixes: cf54ca8bc567 ("drm/i915/cnl: Implement voltage swing sequence.")
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1500329122-32662-1-git-send-email-manasi.d.navare@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit a8e45a1c42d11597e975f3e5f2fe182f90cdaa7f)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ddi.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 80e96f1f49d2..9edeaaef77ad 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1896,8 +1896,8 @@ static void cnl_ddi_vswing_sequence(struct intel_encoder *encoder, u32 level) val = I915_READ(CNL_PORT_TX_DW4_LN(port, ln)); val &= ~LOADGEN_SELECT; - if (((rate < 600000) && (width == 4) && (ln >= 1)) || - ((rate < 600000) && (width < 4) && ((ln == 1) || (ln == 2)))) { + if ((rate <= 600000 && width == 4 && ln >= 1) || + (rate <= 600000 && width < 4 && (ln == 1 || ln == 2))) { val |= LOADGEN_SELECT; } I915_WRITE(CNL_PORT_TX_DW4_LN(port, ln), val); |