drm/exynos: soft reset mixer before reconfigure after power-on

Mixer soft reset is a recommended step before reconfiguring
the mixer after power on. Mixer looses the previous state of
DMAs if soft reset. This is the recommendation from the
hardware team.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Rahul Sharma 2014-06-23 11:02:24 +05:30 committed by Inki Dae
parent 5c0f4829e1
commit d74ed93784

View File

@ -1085,6 +1085,8 @@ static void mixer_poweron(struct exynos_drm_manager *mgr)
ctx->powered = true;
mutex_unlock(&ctx->mixer_mutex);
mixer_reg_writemask(res, MXR_STATUS, ~0, MXR_STATUS_SOFT_RESET);
mixer_reg_write(res, MXR_INT_EN, ctx->int_en);
mixer_win_reset(ctx);