linux-kernel - [PATCH v2 1/2] media: imx: imx8mq-mipi-csi2: remove wrong irq config write operation

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Date:   Thu, 16 Dec 2021 10:03:35 +0100
From:   Martin Kepplinger <martin.kepplinger@...i.sm>
To:     martin.kepplinger@...i.sm, festevam@...il.com,
        laurent.pinchart@...asonboard.com, p.zabel@...gutronix.de
Cc:     kernel@...gutronix.de, linux-arm-kernel@...ts.infradead.org,
        linux-imx@....com, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        mchehab@...nel.org, slongerbeam@...il.com, kernel@...i.sm
Subject: [PATCH v2 1/2] media: imx: imx8mq-mipi-csi2: remove wrong irq config write operation

The place where this register writel() that masks one interrupt is placed
does not guarantee that the device is powered so that's not allowed. Moreover
imx8mq_mipi_csi_start_stream() masks the interrupt anyway so the
write is not even needed. Remove it as this is a mistake that slipped in
with the driver.

Fixes: f33fd8d77dd0 ("media: imx: add a driver for i.MX8MQ mipi csi rx phy and controller")
Signed-off-by: Martin Kepplinger <martin.kepplinger@...i.sm>
---
 drivers/staging/media/imx/imx8mq-mipi-csi2.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/staging/media/imx/imx8mq-mipi-csi2.c b/drivers/staging/media/imx/imx8mq-mipi-csi2.c
index 7adbdd14daa9..8f3cc138c52c 100644
--- a/drivers/staging/media/imx/imx8mq-mipi-csi2.c
+++ b/drivers/staging/media/imx/imx8mq-mipi-csi2.c
@@ -398,9 +398,6 @@ static int imx8mq_mipi_csi_s_stream(struct v4l2_subdev *sd, int enable)
 	struct csi_state *state = mipi_sd_to_csi2_state(sd);
 	int ret = 0;
 
-	imx8mq_mipi_csi_write(state, CSI2RX_IRQ_MASK,
-			      CSI2RX_IRQ_MASK_ULPS_STATUS_CHANGE);
-
 	if (enable) {
 		ret = pm_runtime_resume_and_get(state->dev);
 		if (ret < 0)
-- 
2.30.2