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From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
To: Benoit Parrot <bparrot@ti.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Pratyush Yadav <p.yadav@ti.com>,
	Lokesh Vutla <lokeshvutla@ti.com>,
	linux-media@vger.kernel.org
Cc: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Subject: [PATCH v2 06/35] media: ti-vpe: cal: use v4l2_get_link_freq
Date: Tue, 20 Apr 2021 15:04:04 +0300
Message-ID: <20210420120433.902394-7-tomi.valkeinen@ideasonboard.com> (raw)
In-Reply-To: <20210420120433.902394-1-tomi.valkeinen@ideasonboard.com>

CAL driver uses V4L2_CID_PIXEL_RATE to get the required pixel rate, and
then changes that value to link rate before configuring the registers.

Rewrite the code to use v4l2_get_link_freq(), which simplifies the code
as we get the link rate directly, and it also adds support for
V4L2_CID_LINK_FREQ.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/media/platform/ti-vpe/cal-camerarx.c | 52 +++++++-------------
 1 file changed, 19 insertions(+), 33 deletions(-)

diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c
index 988a01529dbc..9591a0c8a215 100644
--- a/drivers/media/platform/ti-vpe/cal-camerarx.c
+++ b/drivers/media/platform/ti-vpe/cal-camerarx.c
@@ -45,22 +45,23 @@ static inline void camerarx_write(struct cal_camerarx *phy, u32 offset, u32 val)
  * ------------------------------------------------------------------
  */
 
-static s64 cal_camerarx_get_external_rate(struct cal_camerarx *phy)
+static s64 cal_camerarx_get_ext_link_freq(struct cal_camerarx *phy)
 {
-	struct v4l2_ctrl *ctrl;
-	s64 rate;
+	struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 = &phy->endpoint.bus.mipi_csi2;
+	u32 num_lanes = mipi_csi2->num_data_lanes;
+	u32 bpp = phy->fmtinfo->bpp;
+	s64 freq;
 
-	ctrl = v4l2_ctrl_find(phy->source->ctrl_handler, V4L2_CID_PIXEL_RATE);
-	if (!ctrl) {
-		phy_err(phy, "no pixel rate control in subdev: %s\n",
+	freq = v4l2_get_link_freq(phy->source->ctrl_handler, bpp, 2 * num_lanes);
+	if (freq < 0) {
+		phy_err(phy, "failed to get link freq for subdev '%s'\n",
 			phy->source->name);
-		return -EPIPE;
+		return freq;
 	}
 
-	rate = v4l2_ctrl_g_ctrl_int64(ctrl);
-	phy_dbg(3, phy, "Source Pixel Rate: %llu\n", rate);
+	phy_dbg(3, phy, "Source Link Freq: %llu\n", freq);
 
-	return rate;
+	return freq;
 }
 
 static void cal_camerarx_lane_config(struct cal_camerarx *phy)
@@ -116,34 +117,19 @@ void cal_camerarx_disable(struct cal_camerarx *phy)
 #define TCLK_MISS	1
 #define TCLK_SETTLE	14
 
-static void cal_camerarx_config(struct cal_camerarx *phy, s64 external_rate)
+static void cal_camerarx_config(struct cal_camerarx *phy, s64 link_freq)
 {
 	unsigned int reg0, reg1;
 	unsigned int ths_term, ths_settle;
-	unsigned int csi2_ddrclk_khz;
-	struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 =
-			&phy->endpoint.bus.mipi_csi2;
-	u32 num_lanes = mipi_csi2->num_data_lanes;
 
 	/* DPHY timing configuration */
 
-	/*
-	 * CSI-2 is DDR and we only count used lanes.
-	 *
-	 * csi2_ddrclk_khz = external_rate / 1000
-	 *		   / (2 * num_lanes) * phy->fmtinfo->bpp;
-	 */
-	csi2_ddrclk_khz = div_s64(external_rate * phy->fmtinfo->bpp,
-				  2 * num_lanes * 1000);
-
-	phy_dbg(1, phy, "csi2_ddrclk_khz: %d\n", csi2_ddrclk_khz);
-
 	/* THS_TERM: Programmed value = floor(20 ns/DDRClk period) */
-	ths_term = 20 * csi2_ddrclk_khz / 1000000;
+	ths_term = div_s64(20 * link_freq, 1000 * 1000 * 1000);
 	phy_dbg(1, phy, "ths_term: %d (0x%02x)\n", ths_term, ths_term);
 
 	/* THS_SETTLE: Programmed value = floor(105 ns/DDRClk period) + 4 */
-	ths_settle = (105 * csi2_ddrclk_khz / 1000000) + 4;
+	ths_settle = div_s64(105 * link_freq, 1000 * 1000 * 1000) + 4;
 	phy_dbg(1, phy, "ths_settle: %d (0x%02x)\n", ths_settle, ths_settle);
 
 	reg0 = camerarx_read(phy, CAL_CSI2_PHY_REG0);
@@ -270,14 +256,14 @@ static void cal_camerarx_ppi_disable(struct cal_camerarx *phy)
 
 static int cal_camerarx_start(struct cal_camerarx *phy)
 {
-	s64 external_rate;
+	s64 link_freq;
 	u32 sscounter;
 	u32 val;
 	int ret;
 
-	external_rate = cal_camerarx_get_external_rate(phy);
-	if (external_rate < 0)
-		return external_rate;
+	link_freq = cal_camerarx_get_ext_link_freq(phy);
+	if (link_freq < 0)
+		return link_freq;
 
 	ret = v4l2_subdev_call(phy->source, core, s_power, 1);
 	if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) {
@@ -325,7 +311,7 @@ static int cal_camerarx_start(struct cal_camerarx *phy)
 	camerarx_read(phy, CAL_CSI2_PHY_REG0);
 
 	/* Program the PHY timing parameters. */
-	cal_camerarx_config(phy, external_rate);
+	cal_camerarx_config(phy, link_freq);
 
 	/*
 	 *    b. Assert the FORCERXMODE signal.
-- 
2.25.1


  parent reply index

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-20 12:03 [PATCH v2 00/35] media: ti-vpe: cal: prepare for multistream support Tomi Valkeinen
2021-04-20 12:03 ` [PATCH v2 01/35] media: ti-vpe: cal: add g/s_parm for legacy API Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 02/35] media: ti-vpe: cal: fix error handling in cal_camerarx_create Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 03/35] media: ti-vpe: cal: remove unused cal_camerarx->dev field Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 04/35] media: ti-vpe: cal: rename "sensor" to "source" Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 05/35] media: ti-vpe: cal: move global config from cal_ctx_wr_dma_config to runtime resume Tomi Valkeinen
2021-04-20 12:04 ` Tomi Valkeinen [this message]
2021-04-20 12:04 ` [PATCH v2 07/35] media: ti-vpe: cal: add cal_ctx_prepare/unprepare Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 08/35] media: ti-vpe: cal: change index and cport to u8 Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 09/35] media: ti-vpe: cal: Add CSI2 context Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 10/35] media: ti-vpe: cal: Add pixel processing context Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 11/35] media: ti-vpe: cal: rename cal_ctx->index to dma_ctx Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 12/35] media: ti-vpe: cal: rename CAL_HL_IRQ_MASK Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 13/35] media: ti-vpe: cal: clean up CAL_CSI2_VC_IRQ_* macros Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 14/35] media: ti-vpe: cal: catch VC errors Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 15/35] media: ti-vpe: cal: remove wait when stopping camerarx Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 16/35] media: ti-vpe: cal: disable csi2 ctx and pix proc at ctx_stop Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 17/35] media: ti-vpe: cal: allocate pix proc dynamically Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 18/35] media: ti-vpe: cal: add 'use_pix_proc' field Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 19/35] media: ti-vpe: cal: add cal_ctx_wr_dma_enable and fix a race Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 20/35] media: ti-vpe: cal: add vc and datatype fields to cal_ctx Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 21/35] media: ti-vpe: cal: handle cal_ctx_v4l2_register error Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 22/35] media: ti-vpe: cal: set field always to V4L2_FIELD_NONE Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 23/35] media: ti-vpe: cal: fix typo in a comment Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 24/35] media: ti-vpe: cal: add mbus_code support to cal_mc_enum_fmt_vid_cap Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 25/35] media: ti-vpe: cal: rename non-MC funcs to cal_legacy_* Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 26/35] media: ti-vpe: cal: init ctx->v_fmt correctly in MC mode Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 27/35] media: ti-vpe: cal: remove cal_camerarx->fmtinfo Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 28/35] media: ti-vpe: cal: support 8 DMA contexts Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 29/35] media: ti-vpe: cal: cleanup phy iteration in cal_remove Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 30/35] media: ti-vpe: cal: fix ctx uninitialization Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 31/35] media: ti-vpe: cal: fix queuing of the initial buffer Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 32/35] media: ti-vpe: cal: use CSI-2 frame number Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 33/35] media: ti-vpe: cal: add camerarx locking Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 34/35] media: ti-vpe: cal: add camerarx enable/disable refcounting Tomi Valkeinen
2021-04-20 12:04 ` [PATCH v2 35/35] media: ti-vpe: cal: allow more than 1 source pads Tomi Valkeinen

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