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| author | Benjamin Gaignard <benjamin.gaignard@linaro.org> | 2014-12-04 11:17:32 +0100 |
|---|---|---|
| committer | Benjamin Gaignard <benjamin.gaignard@linaro.org> | 2014-12-11 13:58:19 +0100 |
| commit | 2f7d0e82ce9fdbb450613abe28c3bbe1bda069a6 (patch) | |
| tree | 6a7bc50d4eda4dae8ce503f49222de63b471f5ff /drivers/gpu/drm/sti/sti_mixer.c | |
| parent | 765692078f08d0229e545d3c1a50bddbc16c800c (diff) | |
drm: sti: clear all mixer control
Make sure that mixer control register is correctly reset
before use it.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Diffstat (limited to 'drivers/gpu/drm/sti/sti_mixer.c')
| -rw-r--r-- | drivers/gpu/drm/sti/sti_mixer.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_mixer.c b/drivers/gpu/drm/sti/sti_mixer.c index 79f369db9fb6..6bcdf3f86d22 100644 --- a/drivers/gpu/drm/sti/sti_mixer.c +++ b/drivers/gpu/drm/sti/sti_mixer.c @@ -215,6 +215,15 @@ int sti_mixer_set_layer_status(struct sti_mixer *mixer, return 0; } +void sti_mixer_clear_all_layers(struct sti_mixer *mixer) +{ + u32 val; + + DRM_DEBUG_DRIVER("%s clear all layer\n", sti_mixer_to_str(mixer)); + val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL) & 0xFFFF0000; + sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val); +} + void sti_mixer_set_matrix(struct sti_mixer *mixer) { unsigned int i; |