From patchwork Sat Sep 18 15:05:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 12503891 X-Patchwork-Delegate: kieran@bingham.xyz Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BAA67C433F5 for ; Sat, 18 Sep 2021 15:04:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9CEA561283 for ; Sat, 18 Sep 2021 15:04:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239663AbhIRPGQ (ORCPT ); Sat, 18 Sep 2021 11:06:16 -0400 Received: from relay2-d.mail.gandi.net ([217.70.183.194]:56909 "EHLO relay2-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239611AbhIRPGQ (ORCPT ); Sat, 18 Sep 2021 11:06:16 -0400 Received: (Authenticated sender: jacopo@jmondi.org) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id BE48640002; Sat, 18 Sep 2021 15:04:49 +0000 (UTC) From: Jacopo Mondi To: tomi.valkeinen@ideasonboard.com, sakari.ailus@linux.intel.com, laurent.pinchart@ideasonboard.com, niklas.soderlund@ragnatech.se, kieran.bingham@ideasonboard.com Cc: Jacopo Mondi , Mauro Carvalho Chehab , Hans Verkuil , Manivannan Sadhasivam , Thomas NIZAN , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, =?utf-8?q?Niklas_S=C3=B6derlund?= Subject: [PATCH 4/5] media: rcar-csi2: Implement multiplexed support Date: Sat, 18 Sep 2021 17:05:06 +0200 Message-Id: <20210918150507.987294-5-jacopo+renesas@jmondi.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210918150507.987294-1-jacopo+renesas@jmondi.org> References: <20210918150507.987294-1-jacopo+renesas@jmondi.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Implement support for multiplexed streams to the R-Car CSI-2 driver. Implement the init_cfg and set_routing operations and move format handling to the subdev state. Use the transmitter's frame descriptor to configure the CSI-2 bus and enable the requested virtual channel and data types. [based on a patch from] Signed-off-by: Niklas Söderlund Signed-off-by: Jacopo Mondi --- drivers/media/platform/rcar-vin/rcar-csi2.c | 289 +++++++++++++++----- 1 file changed, 219 insertions(+), 70 deletions(-) diff --git a/drivers/media/platform/rcar-vin/rcar-csi2.c b/drivers/media/platform/rcar-vin/rcar-csi2.c index e28eff039688..db582633d415 100644 --- a/drivers/media/platform/rcar-vin/rcar-csi2.c +++ b/drivers/media/platform/rcar-vin/rcar-csi2.c @@ -69,10 +69,7 @@ struct rcar_csi2; #define FLD_REG 0x1c #define FLD_FLD_NUM(n) (((n) & 0xff) << 16) #define FLD_DET_SEL(n) (((n) & 0x3) << 4) -#define FLD_FLD_EN4 BIT(3) -#define FLD_FLD_EN3 BIT(2) -#define FLD_FLD_EN2 BIT(1) -#define FLD_FLD_EN BIT(0) +#define FLD_FLD_EN(n) BIT((n) & 0xf) /* Automatic Standby Control */ #define ASTBY_REG 0x20 @@ -309,31 +306,23 @@ static const struct rcsi2_mbps_reg hsfreqrange_m3w_h3es1[] = { #define CSI0CLKFREQRANGE(n) ((n & 0x3f) << 16) struct rcar_csi2_format { - u32 code; unsigned int datatype; unsigned int bpp; }; static const struct rcar_csi2_format rcar_csi2_formats[] = { - { .code = MEDIA_BUS_FMT_RGB888_1X24, .datatype = 0x24, .bpp = 24 }, - { .code = MEDIA_BUS_FMT_UYVY8_1X16, .datatype = 0x1e, .bpp = 16 }, - { .code = MEDIA_BUS_FMT_YUYV8_1X16, .datatype = 0x1e, .bpp = 16 }, - { .code = MEDIA_BUS_FMT_UYVY8_2X8, .datatype = 0x1e, .bpp = 16 }, - { .code = MEDIA_BUS_FMT_YUYV10_2X10, .datatype = 0x1e, .bpp = 20 }, - { .code = MEDIA_BUS_FMT_Y10_1X10, .datatype = 0x2b, .bpp = 10 }, - { .code = MEDIA_BUS_FMT_SBGGR8_1X8, .datatype = 0x2a, .bpp = 8 }, - { .code = MEDIA_BUS_FMT_SGBRG8_1X8, .datatype = 0x2a, .bpp = 8 }, - { .code = MEDIA_BUS_FMT_SGRBG8_1X8, .datatype = 0x2a, .bpp = 8 }, - { .code = MEDIA_BUS_FMT_SRGGB8_1X8, .datatype = 0x2a, .bpp = 8 }, - { .code = MEDIA_BUS_FMT_Y8_1X8, .datatype = 0x2a, .bpp = 8 }, + { .datatype = 0x1e, .bpp = 16 }, + { .datatype = 0x24, .bpp = 24 }, + { .datatype = 0x2a, .bpp = 8 }, + { .datatype = 0x2b, .bpp = 10 }, }; -static const struct rcar_csi2_format *rcsi2_code_to_fmt(unsigned int code) +static const struct rcar_csi2_format *rcsi2_datatype_to_fmt(unsigned int dt) { unsigned int i; for (i = 0; i < ARRAY_SIZE(rcar_csi2_formats); i++) - if (rcar_csi2_formats[i].code == code) + if (rcar_csi2_formats[i].datatype == dt) return &rcar_csi2_formats[i]; return NULL; @@ -370,8 +359,6 @@ struct rcar_csi2 { struct v4l2_subdev *remote; unsigned int remote_pad; - struct v4l2_mbus_framefmt mf; - struct mutex lock; int stream_count; @@ -421,6 +408,32 @@ static int rcsi2_exit_standby(struct rcar_csi2 *priv) return 0; } +static int rcsi2_get_remote_frame_desc(struct rcar_csi2 *priv, + struct v4l2_mbus_frame_desc *fd) +{ + struct media_pad *pad; + int ret; + + if (!priv->remote) + return -ENODEV; + + pad = media_entity_remote_pad(&priv->pads[RCAR_CSI2_SINK]); + if (!pad) + return -ENODEV; + + ret = v4l2_subdev_call(priv->remote, pad, get_frame_desc, + pad->index, fd); + if (ret) + return ret; + + if (fd->type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2) { + dev_err(priv->dev, "Frame desc do not describe CSI-2 link"); + return -EINVAL; + } + + return 0; +} + static int rcsi2_wait_phy_start(struct rcar_csi2 *priv, unsigned int lanes) { @@ -460,11 +473,14 @@ static int rcsi2_set_phypll(struct rcar_csi2 *priv, unsigned int mbps) return 0; } -static int rcsi2_calc_mbps(struct rcar_csi2 *priv, unsigned int bpp, - unsigned int lanes) +static int rcsi2_calc_mbps(struct rcar_csi2 *priv, + struct v4l2_mbus_frame_desc *fd, unsigned int lanes) { + const struct v4l2_mbus_frame_desc_entry_csi2 *csi2_desc; + const struct rcar_csi2_format *format; struct v4l2_subdev *source; struct v4l2_ctrl *ctrl; + unsigned int i; u64 mbps; if (!priv->remote) @@ -480,12 +496,30 @@ static int rcsi2_calc_mbps(struct rcar_csi2 *priv, unsigned int bpp, return -EINVAL; } + /* Verify that all remote streams send the same datatype. */ + csi2_desc = NULL; + for (i = 0; i < fd->num_entries; i++) { + struct v4l2_mbus_frame_desc_entry_csi2 *stream_desc; + + stream_desc = &fd->entry[i].bus.csi2; + if (!csi2_desc) + csi2_desc = stream_desc; + + if (csi2_desc->dt != stream_desc->dt) { + dev_err(priv->dev, + "Remote streams with different DT: %u - %u\n", + csi2_desc->dt, stream_desc->dt); + return -EINVAL; + } + } + format = rcsi2_datatype_to_fmt(csi2_desc->dt); + /* * Calculate the phypll in mbps. * link_freq = (pixel_rate * bits_per_sample) / (2 * nr_of_lanes) * bps = link_freq * 2 */ - mbps = v4l2_ctrl_g_ctrl_int64(ctrl) * bpp; + mbps = v4l2_ctrl_g_ctrl_int64(ctrl) * format->bpp; do_div(mbps, lanes * 1000000); return mbps; @@ -541,49 +575,64 @@ static int rcsi2_get_active_lanes(struct rcar_csi2 *priv, static int rcsi2_start_receiver(struct rcar_csi2 *priv) { - const struct rcar_csi2_format *format; + const struct v4l2_subdev_stream_configs *configs; + struct v4l2_subdev_state *state; u32 phycnt, vcdt = 0, vcdt2 = 0, fld = 0; + struct v4l2_mbus_frame_desc fd; unsigned int lanes; unsigned int i; int mbps, ret; - dev_dbg(priv->dev, "Input size (%ux%u%c)\n", - priv->mf.width, priv->mf.height, - priv->mf.field == V4L2_FIELD_NONE ? 'p' : 'i'); - - /* Code is validated in set_fmt. */ - format = rcsi2_code_to_fmt(priv->mf.code); + /* Get information about multiplexed link. */ + ret = rcsi2_get_remote_frame_desc(priv, &fd); + if (ret) + return ret; - /* - * Enable all supported CSI-2 channels with virtual channel and - * data type matching. - * - * NOTE: It's not possible to get individual datatype for each - * source virtual channel. Once this is possible in V4L2 - * it should be used here. - */ - for (i = 0; i < priv->info->num_channels; i++) { + for (i = 0; i < fd.num_entries; i++) { + struct v4l2_mbus_frame_desc_entry *entry = &fd.entry[i]; u32 vcdt_part; - vcdt_part = VCDT_SEL_VC(i) | VCDT_VCDTN_EN | VCDT_SEL_DTN_ON | - VCDT_SEL_DT(format->datatype); + vcdt_part = VCDT_SEL_VC(entry->bus.csi2.vc) | + VCDT_VCDTN_EN | VCDT_SEL_DTN_ON | + VCDT_SEL_DT(entry->bus.csi2.dt); /* Store in correct reg and offset. */ - if (i < 2) - vcdt |= vcdt_part << ((i % 2) * 16); + if (entry->bus.csi2.vc < 2) + vcdt |= vcdt_part << + ((entry->bus.csi2.vc % 2) * 16); else - vcdt2 |= vcdt_part << ((i % 2) * 16); + vcdt2 |= vcdt_part << + ((entry->bus.csi2.vc % 2) * 16); + + dev_dbg(priv->dev, "VC: %d datatype: 0x%x\n", + entry->bus.csi2.vc, entry->bus.csi2.dt); } - if (priv->mf.field == V4L2_FIELD_ALTERNATE) { - fld = FLD_DET_SEL(1) | FLD_FLD_EN4 | FLD_FLD_EN3 | FLD_FLD_EN2 - | FLD_FLD_EN; + /* + * Configure field handling inspecting the formats of the + * single sink pad streams. + */ + state = v4l2_subdev_lock_active_state(&priv->subdev); + configs = &state->stream_configs; + for (i = 0; i < configs->num_configs; ++i) { + const struct v4l2_subdev_stream_config *config = configs->configs; + + if (config->pad != RCAR_CSI2_SINK) + continue; + + if (config->fmt.field != V4L2_FIELD_ALTERNATE) + continue; + + fld |= FLD_DET_SEL(1); + fld |= FLD_FLD_EN(config->stream); - if (priv->mf.height == 240) + /* PAL vs NTSC. */ + if (config->fmt.height == 240) fld |= FLD_FLD_NUM(0); else fld |= FLD_FLD_NUM(1); } + v4l2_subdev_unlock_state(state); /* * Get the number of active data lanes inspecting the remote mbus @@ -596,7 +645,7 @@ static int rcsi2_start_receiver(struct rcar_csi2 *priv) phycnt = PHYCNT_ENABLECLK; phycnt |= (1 << lanes) - 1; - mbps = rcsi2_calc_mbps(priv, format->bpp, lanes); + mbps = rcsi2_calc_mbps(priv, &fd, lanes); if (mbps < 0) return mbps; @@ -722,43 +771,127 @@ static int rcsi2_set_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { - struct rcar_csi2 *priv = sd_to_csi2(sd); - struct v4l2_mbus_framefmt *framefmt; + struct v4l2_mbus_framefmt *fmt; + struct v4l2_subdev_state *state; + int ret = 0; - if (!rcsi2_code_to_fmt(format->format.code)) - format->format.code = rcar_csi2_formats[0].code; + /* + * Format is propagated from sink streams to source streams, so + * disallow setting format on the single source pad. + */ + if (format->pad < RCAR_CSI2_SOURCE_VC0) + return -EINVAL; - if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) { - priv->mf = format->format; - } else { - framefmt = v4l2_subdev_get_try_format(sd, sd_state, 0); - *framefmt = format->format; + state = v4l2_subdev_validate_and_lock_state(sd, sd_state); + fmt = v4l2_state_get_stream_format(state, format->pad, + format->stream); + if (!fmt) { + ret = -EINVAL; + goto out; } + *fmt = format->format; - return 0; + /* Propagate format to the other end of the route. */ + fmt = v4l2_state_get_opposite_stream_format(state, format->pad, + format->stream); + if (!fmt) { + ret = -EINVAL; + goto out; + } + *fmt = format->format; + +out: + v4l2_subdev_unlock_state(state); + return ret; } -static int rcsi2_get_pad_format(struct v4l2_subdev *sd, - struct v4l2_subdev_state *sd_state, - struct v4l2_subdev_format *format) +static int rcsi2_set_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_krouting *routing) { - struct rcar_csi2 *priv = sd_to_csi2(sd); + static const struct v4l2_mbus_framefmt format = { + .width = 640, + .height = 480, + .code = MEDIA_BUS_FMT_UYVY8_2X8, + .field = V4L2_FIELD_NONE, + .colorspace = V4L2_COLORSPACE_SRGB, + .ycbcr_enc = V4L2_YCBCR_ENC_601, + .quantization = V4L2_QUANTIZATION_LIM_RANGE, + .xfer_func = V4L2_XFER_FUNC_SRGB, + }; + int ret; + + ret = v4l2_routing_simple_verify(routing); + if (ret) + return ret; + + state = v4l2_subdev_validate_and_lock_state(sd, state); + + ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format); - if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) - format->format = priv->mf; - else - format->format = *v4l2_subdev_get_try_format(sd, sd_state, 0); + v4l2_subdev_unlock_state(state); + + if (ret) + return ret; return 0; } +static int rcsi2_init_cfg(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + u32 which = state->which; + + /* Initialize 4 routes from each source pad to the single sink pad. */ + struct v4l2_subdev_route routes[] = { + { + .sink_pad = RCAR_CSI2_SINK, + .sink_stream = 0, + .source_pad = RCAR_CSI2_SOURCE_VC0, + .source_stream = 0, + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE, + }, + { + .sink_pad = RCAR_CSI2_SINK, + .sink_stream = 1, + .source_pad = RCAR_CSI2_SOURCE_VC1, + .source_stream = 0, + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE, + }, + { + .sink_pad = RCAR_CSI2_SINK, + .sink_stream = 2, + .source_pad = RCAR_CSI2_SOURCE_VC2, + .source_stream = 0, + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE, + }, + { + .sink_pad = RCAR_CSI2_SINK, + .sink_stream = 3, + .source_pad = RCAR_CSI2_SOURCE_VC3, + .source_stream = 0, + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE, + }, + }; + + struct v4l2_subdev_krouting routing = { + .which = which, + .num_routes = ARRAY_SIZE(routes), + .routes = routes, + }; + + return rcsi2_set_routing(sd, state, &routing); +} + static const struct v4l2_subdev_video_ops rcar_csi2_video_ops = { .s_stream = rcsi2_s_stream, }; static const struct v4l2_subdev_pad_ops rcar_csi2_pad_ops = { + .init_cfg = rcsi2_init_cfg, .set_fmt = rcsi2_set_pad_format, - .get_fmt = rcsi2_get_pad_format, + .get_fmt = v4l2_subdev_get_fmt, + .set_routing = rcsi2_set_routing, }; static const struct v4l2_subdev_ops rcar_csi2_subdev_ops = { @@ -814,6 +947,13 @@ static int rcsi2_notify_bound(struct v4l2_async_notifier *notifier, struct rcar_csi2 *priv = notifier_to_csi2(notifier); int pad; + if (!v4l2_subdev_has_op(subdev, pad, get_frame_desc)) { + dev_err(priv->dev, + "Subdev %s bound failed: missing get_frame_desc()\n", + subdev->name); + return -EINVAL; + } + pad = media_entity_get_fwnode_pad(&subdev->entity, asd->match.fwnode, MEDIA_PAD_FL_SOURCE); if (pad < 0) { @@ -1260,7 +1400,8 @@ static int rcsi2_probe(struct platform_device *pdev) v4l2_set_subdevdata(&priv->subdev, &pdev->dev); snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s %s", KBUILD_MODNAME, dev_name(&pdev->dev)); - priv->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; + priv->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | + V4L2_SUBDEV_FL_MULTIPLEXED; priv->subdev.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; priv->subdev.entity.ops = &rcar_csi2_entity_ops; @@ -1274,16 +1415,23 @@ static int rcsi2_probe(struct platform_device *pdev) if (ret) goto error; + ret = v4l2_subdev_alloc_state(&priv->subdev); + if (ret) + goto error; + pm_runtime_enable(&pdev->dev); ret = v4l2_async_register_subdev(&priv->subdev); if (ret < 0) - goto error; + goto error_state; dev_info(priv->dev, "%d lanes found\n", priv->lanes); return 0; +error_state: + v4l2_subdev_free_state(&priv->subdev); + error: v4l2_async_notifier_unregister(&priv->notifier); v4l2_async_notifier_cleanup(&priv->notifier); @@ -1297,6 +1445,7 @@ static int rcsi2_remove(struct platform_device *pdev) v4l2_async_notifier_unregister(&priv->notifier); v4l2_async_notifier_cleanup(&priv->notifier); + v4l2_subdev_free_state(&priv->subdev); v4l2_async_unregister_subdev(&priv->subdev); pm_runtime_disable(&pdev->dev);