linux-kernel - [PATCH v2 07/12] media: imx-mipi-csis: Add support to configure specific vc

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Message-ID: <20250814140943.22531-8-inbaraj.e@samsung.com>
Date: Thu, 14 Aug 2025 19:39:38 +0530
From: Inbaraj E <inbaraj.e@...sung.com>
To: mturquette@...libre.com, sboyd@...nel.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, krzk@...nel.org,
	s.nawrocki@...sung.com, s.hauer@...gutronix.de, shawnguo@...nel.org,
	cw00.choi@...sung.com, rmfrfs@...il.com, laurent.pinchart@...asonboard.com,
	martink@...teo.de, mchehab@...nel.org, linux-fsd@...la.com, will@...nel.org,
	catalin.marinas@....com, pankaj.dubey@...sung.com, shradha.t@...sung.com,
	ravi.patel@...sung.com
Cc: linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, alim.akhtar@...sung.com,
	linux-samsung-soc@...r.kernel.org, kernel@...i.sm, kernel@...gutronix.de,
	festevam@...il.com, linux-media@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, Inbaraj E <inbaraj.e@...sung.com>
Subject: [PATCH v2 07/12] media: imx-mipi-csis: Add support to configure
 specific vc

MIPI_CSIS_V3_3 and MIPI_CSIS_V3_6_3 support streaming only on VC0. The
MIPI_CSIS_V4_3 present in the FSD SoC supports streaming on any one VC
out of four VCs. To extend support for the FSD SoC, add the ability to
configure a specific VC. The FSD CSI Rx can configure any one VC and
start streaming.

Signed-off-by: Inbaraj E <inbaraj.e@...sung.com>
---
 drivers/media/platform/nxp/imx-mipi-csis.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/nxp/imx-mipi-csis.c b/drivers/media/platform/nxp/imx-mipi-csis.c
index a3e2c8ae332f..4f6c417fdf58 100644
--- a/drivers/media/platform/nxp/imx-mipi-csis.c
+++ b/drivers/media/platform/nxp/imx-mipi-csis.c
@@ -54,7 +54,7 @@
 
 /* CSIS common control */
 #define MIPI_CSIS_CMN_CTRL			0x04
-#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW	BIT(16)
+#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW(n)	BIT(((n) + 16))
 #define MIPI_CSIS_CMN_CTRL_INTER_MODE		BIT(10)
 #define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW_CTRL	BIT(2)
 #define MIPI_CSIS_CMN_CTRL_RESET		BIT(1)
@@ -319,6 +319,7 @@ struct mipi_csis_device {
 		u32 hs_settle;
 		u32 clk_settle;
 	} debug;
+	unsigned int vc;
 };
 
 /* -----------------------------------------------------------------------------
@@ -544,9 +545,10 @@ static void __mipi_csis_set_format(struct mipi_csis_device *csis,
 				   const struct csis_pix_format *csis_fmt)
 {
 	u32 val;
+	unsigned int vc = csis->vc;
 
 	/* Color format */
-	val = mipi_csis_read(csis, MIPI_CSIS_ISP_CONFIG_CH(0));
+	val = mipi_csis_read(csis, MIPI_CSIS_ISP_CONFIG_CH(vc));
 	val &= ~(MIPI_CSIS_ISPCFG_ALIGN_32BIT | MIPI_CSIS_ISPCFG_FMT_MASK
 		| MIPI_CSIS_ISPCFG_PIXEL_MASK);
 
@@ -567,11 +569,11 @@ static void __mipi_csis_set_format(struct mipi_csis_device *csis,
 		val |= MIPI_CSIS_ISPCFG_PIXEL_MODE_DUAL;
 
 	val |= MIPI_CSIS_ISPCFG_FMT(csis_fmt->data_type);
-	mipi_csis_write(csis, MIPI_CSIS_ISP_CONFIG_CH(0), val);
+	mipi_csis_write(csis, MIPI_CSIS_ISP_CONFIG_CH(vc), val);
 
 	/* Pixel resolution */
 	val = format->width | (format->height << 16);
-	mipi_csis_write(csis, MIPI_CSIS_ISP_RESOL_CH(0), val);
+	mipi_csis_write(csis, MIPI_CSIS_ISP_RESOL_CH(vc), val);
 }
 
 static int mipi_csis_calculate_params(struct mipi_csis_device *csis,
@@ -631,6 +633,7 @@ static void mipi_csis_set_params(struct mipi_csis_device *csis,
 {
 	int lanes = csis->bus.num_data_lanes;
 	u32 val;
+	unsigned int vc = csis->vc;
 
 	val = mipi_csis_read(csis, MIPI_CSIS_CMN_CTRL);
 	val &= ~MIPI_CSIS_CMN_CTRL_LANE_NR_MASK;
@@ -648,7 +651,7 @@ static void mipi_csis_set_params(struct mipi_csis_device *csis,
 	val = (0 << MIPI_CSIS_ISP_SYNC_HSYNC_LINTV_OFFSET)
 	    | (0 << MIPI_CSIS_ISP_SYNC_VSYNC_SINTV_OFFSET)
 	    | (0 << MIPI_CSIS_ISP_SYNC_VSYNC_EINTV_OFFSET);
-	mipi_csis_write(csis, MIPI_CSIS_ISP_SYNC_CH(0), val);
+	mipi_csis_write(csis, MIPI_CSIS_ISP_SYNC_CH(vc), val);
 
 	val = mipi_csis_read(csis, MIPI_CSIS_CLK_CTRL);
 	val |= MIPI_CSIS_CLK_CTRL_WCLK_SRC;
@@ -669,7 +672,7 @@ static void mipi_csis_set_params(struct mipi_csis_device *csis,
 	/* Update the shadow register. */
 	val = mipi_csis_read(csis, MIPI_CSIS_CMN_CTRL);
 	mipi_csis_write(csis, MIPI_CSIS_CMN_CTRL,
-			val | MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW |
+			val | MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW(vc) |
 			MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW_CTRL);
 }
 
@@ -945,6 +948,8 @@ static int mipi_csis_s_stream(struct v4l2_subdev *sd, int enable)
 	struct v4l2_subdev_state *state;
 	int ret;
 
+	csis->vc = 0;
+
 	if (!enable) {
 		v4l2_subdev_disable_streams(csis->source.sd,
 					    csis->source.pad->index, BIT(0));
-- 
2.49.0