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drm/i915/fbc: Streamline frontbuffer busy bits handling

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If the frontbuffer bits say this fbc instance isn't affected just
skip the whole thing.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220315140001.1172-3-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
This commit is contained in:
Ville Syrjälä 2022-03-15 15:59:56 +02:00
parent 20bea20a55
commit 529b43dfcd
1 changed files with 18 additions and 10 deletions
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28
drivers/gpu/drm/i915/display/intel_fbc.c
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@ -1273,6 +1273,7 @@ static void __intel_fbc_disable(struct intel_fbc *fbc)
__intel_fbc_cleanup_cfb(fbc);
fbc->state.plane = NULL;
fbc->busy_bits = 0;
}
static void __intel_fbc_post_update(struct intel_fbc *fbc)
@ -1328,11 +1329,14 @@ static void __intel_fbc_invalidate(struct intel_fbc *fbc,
mutex_lock(&fbc->lock);
fbc->busy_bits |= intel_fbc_get_frontbuffer_bit(fbc) & frontbuffer_bits;
frontbuffer_bits &= intel_fbc_get_frontbuffer_bit(fbc);
if (!frontbuffer_bits)
goto out;
if (fbc->state.plane && fbc->busy_bits)
intel_fbc_deactivate(fbc, "frontbuffer write");
fbc->busy_bits |= frontbuffer_bits;
intel_fbc_deactivate(fbc, "frontbuffer write");
out:
mutex_unlock(&fbc->lock);
}
@ -1354,18 +1358,22 @@ static void __intel_fbc_flush(struct intel_fbc *fbc,
{
mutex_lock(&fbc->lock);
frontbuffer_bits &= intel_fbc_get_frontbuffer_bit(fbc);
if (!frontbuffer_bits)
goto out;
fbc->busy_bits &= ~frontbuffer_bits;
if (origin == ORIGIN_FLIP || origin == ORIGIN_CURSOR_UPDATE)
goto out;
if (!fbc->busy_bits && fbc->state.plane &&
(frontbuffer_bits & intel_fbc_get_frontbuffer_bit(fbc))) {
if (fbc->active)
intel_fbc_nuke(fbc);
else if (!fbc->flip_pending)
__intel_fbc_post_update(fbc);
}
if (fbc->busy_bits)
goto out;
if (fbc->active)
intel_fbc_nuke(fbc);
else if (!fbc->flip_pending)
__intel_fbc_post_update(fbc);
out:
mutex_unlock(&fbc->lock);