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[4/5] drm/exynos: soft reset mixer before reconfigure after power-on

Message ID 1403091293-15058-5-git-send-email-rahul.sharma@samsung.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Rahul Sharma June 18, 2014, 11:34 a.m. UTC
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>
 drivers/gpu/drm/exynos/exynos_mixer.c |    2 ++
 1 file changed, 2 insertions(+)
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diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 6773b03..6f18581 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;
+	mixer_reg_writemask(res, MXR_STATUS, ~0, MXR_STATUS_SOFT_RESET);
 	mixer_reg_write(res, MXR_INT_EN, ctx->int_en);