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drm/i915: don't write PLANE_BUF_CFG twice every time 

We were writing to PLANE_BUF_CFG(pipe, plane_id) twice for every
platform, and we were even using different values on the gen10- planar
case. The first write is useless since it just gets replaced with the
next one, so kill it.

There's a lot to improve in the DDB code, but let's start by avoiding
the double write.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181004231600.14101-6-paulo.r.zanoni@intel.com
This commit is contained in:
Paulo Zanoni 2018-10-04 16:15:59 -07:00
parent cbacc79db6
commit 9e44b180f8
1 changed files with 0 additions and 2 deletions
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2
drivers/gpu/drm/i915/intel_pm.c
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@ -5037,8 +5037,6 @@ static void skl_write_plane_wm(struct intel_crtc *intel_crtc,
skl_write_wm_level(dev_priv, PLANE_WM_TRANS(pipe, plane_id),
&wm->trans_wm);
skl_ddb_entry_write(dev_priv, PLANE_BUF_CFG(pipe, plane_id),
&ddb->plane[pipe][plane_id]);
/* FIXME: add proper NV12 support for ICL. */
if (INTEL_GEN(dev_priv) >= 11)
return skl_ddb_entry_write(dev_priv,