linux-kernel - [PATCH v4 07/34] media: camss: csiphy: Ensure clock mux config is done before the rest

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Message-Id: <1532536723-19062-8-git-send-email-todor.tomov@linaro.org>
Date:   Wed, 25 Jul 2018 19:38:16 +0300
From:   Todor Tomov <todor.tomov@...aro.org>
To:     mchehab@...nel.org, sakari.ailus@...ux.intel.com,
        hans.verkuil@...co.com, laurent.pinchart+renesas@...asonboard.com,
        linux-media@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Todor Tomov <todor.tomov@...aro.org>
Subject: [PATCH v4 07/34] media: camss: csiphy: Ensure clock mux config is done before the rest

Add a write memory barier after clock mux config and before the rest
of the csiphy config.

Signed-off-by: Todor Tomov <todor.tomov@...aro.org>
---
 drivers/media/platform/qcom/camss/camss-csiphy.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.c b/drivers/media/platform/qcom/camss/camss-csiphy.c
index b37e691..2a9adcd 100644
--- a/drivers/media/platform/qcom/camss/camss-csiphy.c
+++ b/drivers/media/platform/qcom/camss/camss-csiphy.c
@@ -364,6 +364,7 @@ static int csiphy_stream_on(struct csiphy_device *csiphy)
 		val |= cfg->csid_id;
 	}
 	writel_relaxed(val, csiphy->base_clk_mux);
+	wmb();
 
 	writel_relaxed(0x1, csiphy->base +
 		       CAMSS_CSI_PHY_GLBL_T_INIT_CFG0);
-- 
2.7.4