From: Rahul Sharma Date: Mon, 23 Jun 2014 05:32:24 +0000 (+0530) Subject: drm/exynos: soft reset mixer before reconfigure after power-on X-Git-Tag: firefly_0821_release~176^2~3673^2~13^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d74ed93784ca3af005b0f5f1c44d972175bba4ad;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Inki Dae --- diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 6773b03fd921..6f1858187e28 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -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);