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Thu, 22 Feb 2024 05:33:34 -0600 Received: from localhost (jluthra.dhcp.ti.com [172.24.227.217]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 41MBXX4h091431; Thu, 22 Feb 2024 05:33:33 -0600 From: Jai Luthra Date: Thu, 22 Feb 2024 17:01:31 +0530 Subject: [PATCH RFC 15/21] SQUASH: media: cadence: csi2rx: Enable per-stream controls Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240222-multistream-v1-15-1837ed916eeb@ti.com> References: <20240222-multistream-v1-0-1837ed916eeb@ti.com> In-Reply-To: <20240222-multistream-v1-0-1837ed916eeb@ti.com> To: Tomi Valkeinen , Mauro Carvalho Chehab , Sakari Ailus , Hans Verkuil , Vaishnav Achath , Maxime Ripard , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: , , , Vignesh Raghavendra , Aradhya Bhatia , Devarsh Thakkar , Changhuang Liang , Jack Zhu , Julien Massot , Jayshri Pawar , Jai Luthra X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; 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fpr=4DE0D818E5D575E8D45AAFC543DE91F9249A7145 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791599533373140802 X-GMAIL-MSGID: 1791599533373140802 With stream routing now supported in the driver, implement the enable_stream and disable_stream hooks in place of the stream-unaware s_stream hook. This allows consumer devices like a DMA bridge or ISP, to enable particular streams on a source pad, which in turn can be used to enable only particular streams on the CSI-TX device connected on the sink pad. Implement a fallback s_stream hook that internally calls enable_stream on each source pad, for consumer drivers that don't use multi-stream APIs to still work. Signed-off-by: Jai Luthra --- drivers/media/platform/cadence/cdns-csi2rx.c | 211 ++++++++++++++++++--------- 1 file changed, 142 insertions(+), 69 deletions(-) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index 1b76610ff617..f08d3b845dc9 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -183,27 +183,43 @@ static void csi2rx_reset(struct csi2rx_priv *csi2rx) static int csi2rx_configure_ext_dphy(struct csi2rx_priv *csi2rx) { + struct v4l2_ctrl_handler *handler = csi2rx->source_subdev->ctrl_handler; union phy_configure_opts opts = { }; struct phy_configure_opts_mipi_dphy *cfg = &opts.mipi_dphy; - struct v4l2_subdev_format sd_fmt = { - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - .pad = CSI2RX_PAD_SINK, - }; + struct v4l2_mbus_framefmt *framefmt; + struct v4l2_subdev_state *state; const struct csi2rx_fmt *fmt; s64 link_freq; int ret; - ret = v4l2_subdev_call_state_active(&csi2rx->subdev, pad, get_fmt, - &sd_fmt); - if (ret < 0) - return ret; + if (v4l2_ctrl_find(handler, V4L2_CID_LINK_FREQ)) { + link_freq = v4l2_get_link_freq(handler, 0, 0); + } else { + state = v4l2_subdev_get_locked_active_state(&csi2rx->subdev); + framefmt = v4l2_subdev_state_get_format(state, CSI2RX_PAD_SINK, + 0); - fmt = csi2rx_get_fmt_by_code(sd_fmt.format.code); + if (framefmt) { + fmt = csi2rx_get_fmt_by_code(framefmt->code); + } else { + dev_err(csi2rx->dev, + "Did not find active sink format\n"); + return -EINVAL; + } - link_freq = v4l2_get_link_freq(csi2rx->source_subdev->ctrl_handler, - fmt->bpp, 2 * csi2rx->num_lanes); - if (link_freq < 0) + link_freq = v4l2_get_link_freq(handler, fmt->bpp, + 2 * csi2rx->num_lanes); + + dev_warn(csi2rx->dev, + "Guessing link frequency using bitdepth of stream 0.\n"); + dev_warn(csi2rx->dev, + "V4L2_CID_LINK_FREQ control is required for multi format sources.\n"); + } + + if (link_freq < 0) { + dev_err(csi2rx->dev, "Unable to calculate link frequency\n"); return link_freq; + } ret = phy_mipi_dphy_get_default_config_for_hsclk(link_freq, csi2rx->num_lanes, cfg); @@ -226,18 +242,10 @@ static int csi2rx_configure_ext_dphy(struct csi2rx_priv *csi2rx) static int csi2rx_start(struct csi2rx_priv *csi2rx) { unsigned int i; - struct media_pad *remote_pad; unsigned long lanes_used = 0; u32 reg; int ret; - remote_pad = media_pad_remote_pad_first(&csi2rx->pads[CSI2RX_PAD_SINK]); - if (!remote_pad) { - dev_err(csi2rx->dev, - "Failed to find connected source\n"); - return -ENODEV; - } - ret = clk_prepare_enable(csi2rx->p_clk); if (ret) return ret; @@ -321,17 +329,10 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) reset_control_deassert(csi2rx->sys_rst); - ret = v4l2_subdev_enable_streams(csi2rx->source_subdev, - remote_pad->index, BIT(0)); - if (ret) - goto err_disable_sysclk; - clk_disable_unprepare(csi2rx->p_clk); return 0; -err_disable_sysclk: - clk_disable_unprepare(csi2rx->sys_clk); err_disable_pixclk: for (; i > 0; i--) { reset_control_assert(csi2rx->pixel_rst[i - 1]); @@ -350,7 +351,6 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) static void csi2rx_stop(struct csi2rx_priv *csi2rx) { - struct media_pad *remote_pad; unsigned int i; u32 val; int ret; @@ -379,13 +379,6 @@ static void csi2rx_stop(struct csi2rx_priv *csi2rx) reset_control_assert(csi2rx->p_rst); clk_disable_unprepare(csi2rx->p_clk); - remote_pad = media_pad_remote_pad_first(&csi2rx->pads[CSI2RX_PAD_SINK]); - if (!remote_pad || - v4l2_subdev_disable_streams(csi2rx->source_subdev, - remote_pad->index, BIT(0))) { - dev_warn(csi2rx->dev, "Couldn't disable our subdev\n"); - } - if (csi2rx->dphy) { writel(0, csi2rx->base + CSI2RX_DPHY_LANE_CTRL_REG); @@ -394,47 +387,125 @@ static void csi2rx_stop(struct csi2rx_priv *csi2rx) } } -static int csi2rx_s_stream(struct v4l2_subdev *subdev, int enable) +static int csi2rx_enable_streams(struct v4l2_subdev *subdev, + struct v4l2_subdev_state *state, u32 pad, + u64 streams_mask) { struct csi2rx_priv *csi2rx = v4l2_subdev_to_csi2rx(subdev); - int ret = 0; + struct media_pad *remote_pad; + u64 sink_streams; + int ret; - if (enable) { - ret = pm_runtime_resume_and_get(csi2rx->dev); - if (ret < 0) - return ret; + remote_pad = media_pad_remote_pad_first(&csi2rx->pads[CSI2RX_PAD_SINK]); + if (!remote_pad) { + dev_err(csi2rx->dev, + "Failed to find connected source\n"); + return -ENODEV; } + ret = pm_runtime_resume_and_get(csi2rx->dev); + if (ret < 0) + return ret; + + sink_streams = v4l2_subdev_state_xlate_streams(state, pad, + CSI2RX_PAD_SINK, + &streams_mask); + mutex_lock(&csi2rx->lock); + /* + * If we're not the first users, there's no need to + * enable the whole controller. + */ + if (!csi2rx->count) { + ret = csi2rx_start(csi2rx); + if (ret) + goto err_stream_start; + } - if (enable) { - /* - * If we're not the first users, there's no need to - * enable the whole controller. - */ - if (!csi2rx->count) { - ret = csi2rx_start(csi2rx); - if (ret) { - pm_runtime_put(csi2rx->dev); - goto out; - } - } + /* Start streaming on the source */ + ret = v4l2_subdev_enable_streams(csi2rx->source_subdev, remote_pad->index, + sink_streams); + if (ret) { + dev_err(csi2rx->dev, + "Failed to start streams %#llx on subdev\n", + sink_streams); + goto err_subdev_enable; + } - csi2rx->count++; - } else { - csi2rx->count--; + csi2rx->count++; + mutex_unlock(&csi2rx->lock); - /* - * Let the last user turn off the lights. - */ - if (!csi2rx->count) - csi2rx_stop(csi2rx); + return 0; + +err_subdev_enable: + if (!csi2rx->count) + csi2rx_stop(csi2rx); +err_stream_start: + mutex_unlock(&csi2rx->lock); + pm_runtime_put(csi2rx->dev); + return ret; +} + +static int csi2rx_disable_streams(struct v4l2_subdev *subdev, + struct v4l2_subdev_state *state, u32 pad, + u64 streams_mask) +{ + struct csi2rx_priv *csi2rx = v4l2_subdev_to_csi2rx(subdev); + struct media_pad *remote_pad; + u64 sink_streams; - pm_runtime_put(csi2rx->dev); + sink_streams = v4l2_subdev_state_xlate_streams(state, pad, + CSI2RX_PAD_SINK, + &streams_mask); + + remote_pad = media_pad_remote_pad_first(&csi2rx->pads[CSI2RX_PAD_SINK]); + if (!remote_pad || + v4l2_subdev_disable_streams(csi2rx->source_subdev, + remote_pad->index, sink_streams)) { + dev_err(csi2rx->dev, "Couldn't disable our subdev\n"); } -out: + mutex_lock(&csi2rx->lock); + csi2rx->count--; + /* + * Let the last user turn off the lights. + */ + if (!csi2rx->count) + csi2rx_stop(csi2rx); mutex_unlock(&csi2rx->lock); + + pm_runtime_put(csi2rx->dev); + + return 0; +} + +static int csi2rx_s_stream_fallback(struct v4l2_subdev *sd, int enable) +{ + struct v4l2_subdev_state *state; + struct v4l2_subdev_route *route; + u64 mask[CSI2RX_PAD_MAX] = {0}; + int i, ret; + + /* Find the stream mask on all source pads */ + state = v4l2_subdev_lock_and_get_active_state(sd); + for (i = CSI2RX_PAD_SOURCE_STREAM0; i < CSI2RX_PAD_MAX; i++) { + for_each_active_route(&state->routing, route) { + if (route->source_pad == i) + mask[i] |= BIT_ULL(route->source_stream); + } + } + v4l2_subdev_unlock_state(state); + + /* Start streaming on each pad */ + for (i = CSI2RX_PAD_SOURCE_STREAM0; i < CSI2RX_PAD_MAX; i++) { + if (enable) + ret = v4l2_subdev_enable_streams(sd, i, mask[i]); + else + ret = v4l2_subdev_disable_streams(sd, i, mask[i]); + if (ret) + return ret; + } + return ret; } @@ -557,15 +628,17 @@ static int csi2rx_get_frame_desc(struct v4l2_subdev *subdev, unsigned int pad, } static const struct v4l2_subdev_pad_ops csi2rx_pad_ops = { - .enum_mbus_code = csi2rx_enum_mbus_code, - .get_fmt = v4l2_subdev_get_fmt, - .set_fmt = csi2rx_set_fmt, - .get_frame_desc = csi2rx_get_frame_desc, - .set_routing = csi2rx_set_routing, + .enum_mbus_code = csi2rx_enum_mbus_code, + .get_fmt = v4l2_subdev_get_fmt, + .set_fmt = csi2rx_set_fmt, + .get_frame_desc = csi2rx_get_frame_desc, + .set_routing = csi2rx_set_routing, + .enable_streams = csi2rx_enable_streams, + .disable_streams = csi2rx_disable_streams, }; static const struct v4l2_subdev_video_ops csi2rx_video_ops = { - .s_stream = csi2rx_s_stream, + .s_stream = csi2rx_s_stream_fallback, }; static const struct v4l2_subdev_ops csi2rx_subdev_ops = {