From: Paulo Zanoni Date: Wed, 1 Aug 2018 00:46:14 +0000 (-0700) Subject: drm/i915/icl: avoid unclaimed PLANE_NV12_BUF_CFG register X-Git-Tag: v4.20-rc1~81^2~28^2~118 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=12a6c931beffeaaa350ef562e91e49918b4b3e68;p=linux.git drm/i915/icl: avoid unclaimed PLANE_NV12_BUF_CFG register We don't have proper watermark NV12 support on ICL due to differences in how it should be implemented. In commit 234059da0f33 ("drm/i915/icl: NV12 y-plane ddb is not in same plane") we avoided writing the non-existent PLANE_NV12_BUF_CFG registers but we forgot to also avoid them on the hardware state readout. While the code is still not correct, at least now we can avoid unclaimed register error messages when dealing with RGB formats, which makes CI happier. Also add some FIXME comments in order to make it even more clear that there's still work to do. References: commit 234059da0f33 ("drm/i915/icl: NV12 y-plane ddb is not in same plane") Cc: Mahesh Kumar Reviewed-by: Mahesh Kumar Signed-off-by: Paulo Zanoni Link: https://patchwork.freedesktop.org/patch/msgid/20180801004614.22149-1-paulo.r.zanoni@intel.com --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index f90a3c7f1c40..24f0cab02bbc 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3909,7 +3909,12 @@ skl_ddb_get_hw_plane_state(struct drm_i915_private *dev_priv, val & PLANE_CTL_ALPHA_MASK); val = I915_READ(PLANE_BUF_CFG(pipe, plane_id)); - val2 = I915_READ(PLANE_NV12_BUF_CFG(pipe, plane_id)); + /* + * FIXME: add proper NV12 support for ICL. Avoid reading unclaimed + * registers for now. + */ + if (INTEL_GEN(dev_priv) < 11) + val2 = I915_READ(PLANE_NV12_BUF_CFG(pipe, plane_id)); if (fourcc == DRM_FORMAT_NV12) { skl_ddb_entry_init_from_hw(dev_priv, @@ -4977,6 +4982,7 @@ static void skl_write_plane_wm(struct intel_crtc *intel_crtc, 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, PLANE_BUF_CFG(pipe, plane_id),