[PATCH v6 4/5] media: imx8mq-mipi-csi2: Explicitly release reset
From: Guoniu Zhou <hidden>
Date: 2025-09-17 08:15:44
Also in:
imx, linux-devicetree, linux-media, lkml
Subsystem:
media drivers for freescale imx7/8, media input infrastructure (v4l/dvb), the rest · Maintainers:
Laurent Pinchart, Frank Li, Martin Kepplinger-Novakovic, Mauro Carvalho Chehab, Linus Torvalds
From: Guoniu Zhou <redacted> Call reset_control_deassert() to explicitly release reset to make sure reset bits are cleared since platform like i.MX8ULP can't clear reset bits automatically. Reviewed-by: Frank Li <Frank.Li@nxp.com> Signed-off-by: Guoniu Zhou <redacted> --- drivers/media/platform/nxp/imx8mq-mipi-csi2.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
index fbad197733eef2e4ef44366e39c3d930d626ce70..4da5acebb7020cc23b77c1031c0b53a229d7f1c9 100644
--- a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
+++ b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c@@ -337,18 +337,14 @@ static int imx8mq_mipi_csi_sw_reset(struct csi_state *state) { int ret; - /* - * these are most likely self-clearing reset bits. to make it - * more clear, the reset-imx7 driver should implement the - * .reset() operation. - */ ret = reset_control_assert(state->rst); if (ret < 0) { dev_err(state->dev, "Failed to assert resets: %d\n", ret); return ret; } - return 0; + /* Explicitly release reset to make sure reset bits are cleared. */ + return reset_control_deassert(state->rst); } static void imx8mq_mipi_csi_set_params(struct csi_state *state)
--
2.34.1