From: Pratyush Yadav <p.yadav@ti.com>
To: Maxime Ripard <mripard@kernel.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh+dt@kernel.org>, Pratyush Yadav <p.yadav@ti.com>,
Kishon Vijay Abraham I <kishon@ti.com>,
Vinod Koul <vkoul@kernel.org>,
Peter Ujfalusi <peter.ujfalusi@gmail.com>,
Steve Longerbeam <slongerbeam@gmail.com>,
Benoit Parrot <bparrot@ti.com>, <linux-media@vger.kernel.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-phy@lists.infradead.org>, <dmaengine@vger.kernel.org>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: [PATCH v2 07/18] media: cadence: csi2rx: Soft reset the streams before starting capture
Date: Wed, 26 May 2021 20:52:57 +0530 [thread overview]
Message-ID: <20210526152308.16525-8-p.yadav@ti.com> (raw)
In-Reply-To: <20210526152308.16525-1-p.yadav@ti.com>
This resets the stream state machines and FIFOs, giving them a clean
slate. On J721E if the streams are not reset before starting the
capture, the captured frame gets wrapped around vertically on every run
after the first.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---
(no changes since v1)
drivers/media/platform/cadence/cdns-csi2rx.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index 459326de2eff..80a50284e525 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -39,6 +39,7 @@
#define CSI2RX_STREAM_BASE(n) (((n) + 1) * 0x100)
#define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000)
+#define CSI2RX_STREAM_CTRL_SOFT_RST BIT(4)
#define CSI2RX_STREAM_CTRL_START BIT(0)
#define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008)
@@ -150,12 +151,22 @@ struct csi2rx_priv *v4l2_subdev_to_csi2rx(struct v4l2_subdev *subdev)
static void csi2rx_reset(struct csi2rx_priv *csi2rx)
{
+ int i;
+
writel(CSI2RX_SOFT_RESET_PROTOCOL | CSI2RX_SOFT_RESET_FRONT,
csi2rx->base + CSI2RX_SOFT_RESET_REG);
udelay(10);
writel(0, csi2rx->base + CSI2RX_SOFT_RESET_REG);
+
+ /* Reset individual streams. */
+ for (i = 0; i < csi2rx->max_streams; i++) {
+ writel(CSI2RX_STREAM_CTRL_SOFT_RST,
+ csi2rx->base + CSI2RX_STREAM_CTRL_REG(i));
+ usleep_range(10, 20);
+ writel(0, csi2rx->base + CSI2RX_STREAM_CTRL_REG(i));
+ }
}
static int csi2rx_configure_external_dphy(struct csi2rx_priv *csi2rx)
--
2.30.0
next prev parent reply other threads:[~2021-05-26 15:24 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-26 15:22 [PATCH v2 00/18] CSI2RX support on J721E Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 01/18] phy: Distinguish between Rx and Tx for MIPI D-PHY with submodes Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 02/18] phy: cdns-dphy: Prepare for Rx support Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 03/18] phy: cdns-dphy: Allow setting mode Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 04/18] phy: cdns-dphy: Add Rx support Pratyush Yadav
2021-05-28 6:09 ` Tomi Valkeinen
2021-05-26 15:22 ` [PATCH v2 05/18] media: ov5640: Use runtime PM to control sensor power Pratyush Yadav
2021-05-28 6:44 ` Tomi Valkeinen
2021-05-28 7:25 ` Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 06/18] media: cadence: csi2rx: Add external DPHY support Pratyush Yadav
2021-05-28 7:23 ` Tomi Valkeinen
2021-05-28 7:30 ` Pratyush Yadav
2021-05-26 15:22 ` Pratyush Yadav [this message]
2021-05-26 15:22 ` [PATCH v2 08/18] media: cadence: csi2rx: Set the STOP bit when stopping a stream Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 09/18] media: cadence: csi2rx: Fix stream data configuration Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 10/18] media: cadence: csi2rx: Populate subdev devnode Pratyush Yadav
2021-05-28 7:16 ` Tomi Valkeinen
2021-05-28 7:24 ` Pratyush Yadav
2021-05-28 7:35 ` Tomi Valkeinen
2021-06-03 12:42 ` Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 11/18] dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX Pratyush Yadav
2021-05-31 6:51 ` Péter Ujfalusi
2021-05-31 9:16 ` Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 12/18] media: Re-structure TI platform drivers Pratyush Yadav
2021-05-28 8:29 ` Tomi Valkeinen
2021-05-26 15:23 ` [PATCH v2 13/18] media: ti: Add CSI2RX support for J721E Pratyush Yadav
2021-05-27 13:29 ` Tomi Valkeinen
2021-06-03 12:49 ` Pratyush Yadav
2021-06-04 8:04 ` Tomi Valkeinen
2021-05-26 15:23 ` [PATCH v2 14/18] media: dt-bindings: Add DT bindings for TI J721E CSI2RX driver Pratyush Yadav
2021-05-27 14:23 ` Rob Herring
2021-06-03 12:43 ` Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 15/18] media: dt-bindings: Convert Cadence CSI2RX binding to YAML Pratyush Yadav
2021-06-01 17:45 ` Rob Herring
2021-06-03 12:23 ` Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 16/18] phy: dt-bindings: Convert Cadence DPHY " Pratyush Yadav
2021-06-02 19:51 ` Rob Herring
2021-05-26 15:23 ` [PATCH v2 17/18] phy: dt-bindings: cdns,dphy: make clocks optional Pratyush Yadav
2021-06-02 13:27 ` Maxime Ripard
2021-06-03 8:16 ` Pratyush Yadav
2021-06-02 20:03 ` Rob Herring
2021-05-26 15:23 ` [PATCH v2 18/18] phy: dt-bindings: cdns,dphy: add power-domains property Pratyush Yadav
2021-06-02 20:03 ` Rob Herring
2021-05-27 12:42 ` [PATCH v2 00/18] CSI2RX support on J721E Tomi Valkeinen
2021-06-03 12:54 ` Pratyush Yadav
2021-05-27 13:23 ` Tomi Valkeinen
2021-06-03 12:52 ` Pratyush Yadav
2021-06-04 7:54 ` Tomi Valkeinen
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