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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2014-06-13 21:41:36 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2014-06-14 06:53:02 +0100 |
| commit | 981aafe797f25aca4977a22f271d387b7fb4ae63 (patch) | |
| tree | d3d8296aef53a10db3ed7f78fe80fd0ef737b3b7 /src/sna/sna_display.c | |
| parent | b27837d5372facde0f9f69eb8df664d2798f0911 (diff) | |
sna: Enable TearFree by default for systems with PSR
Panel Self-Refresh requires us to avoid frontbuffer rendering in order
to be power efficient. This is a job for TearFree!
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src/sna/sna_display.c')
| -rw-r--r-- | src/sna/sna_display.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c index eeab3498..e1839fcc 100644 --- a/src/sna/sna_display.c +++ b/src/sna/sna_display.c @@ -5200,6 +5200,25 @@ bool sna_mode_pre_init(ScrnInfoPtr scrn, struct sna *sna) return scrn->modes != NULL; } +bool +sna_mode_wants_tear_free(struct sna *sna) +{ + xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(sna->scrn); + int i; + + for (i = 0; i < sna->mode.num_real_output; i++) { + struct sna_output *output = to_sna_output(config->output[i]); + int id = find_property(sna, output, "Panel Self-Refresh"); + if (id !=-1 && output->prop_values[id] != -1) { + DBG(("%s: Panel Self-Refresh detected on %s\n", + __FUNCTION__, config->output[i]->name)); + return true; + } + } + + return false; +} + void sna_mode_close(struct sna *sna) { |