From patchwork Wed Aug 21 14:10:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 821160 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ACE4A1AF4F9 for ; Wed, 21 Aug 2024 14:16:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724249810; cv=none; b=OGZoWYBUGD1I8dLlpi4rAoN474JcCFGaNjYnmvfZ2vdnHbUuri/k6Mc3r5BwRAWwho1JvlbEz8fYwXrlBU3TAdd4+fhraruAtPbYj8vtGtp0/uBp1LfKwt46uZWIbsEbyo6BS3FCs6c7afWLKTfFHV2zZWv0APzvAtH59J6jGpM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724249810; c=relaxed/simple; bh=3tru/yg99ssbyHwdsnDiGUXpoxgbvIJsUNjWdDbRVvc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aMd3s/JnzEMF+awCInLN+ltfaUAuhaWZQm+5aRZ4YkDYGRDLS3gYOWKpF/UNJJaEEEEYgSw18BPA67kOjIqrcRRS+TZp3jc7tFjwFb989/rtprgh3ij0jfK+Dc5F5HOtQvtCs9oVnkptVC5fxxQdOPINseeM24w/bezXokLAw74= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 349A8C4AF09; Wed, 21 Aug 2024 14:16:49 +0000 (UTC) From: Hans Verkuil To: linux-media@vger.kernel.org Cc: Maxime Ripard , dri-devel@lists.freedesktop.org, Hans Verkuil Subject: [RFC PATCH 4/7] media: i2c: adv7604: export InfoFrames to debugfs Date: Wed, 21 Aug 2024 16:10:18 +0200 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Export InfoFrames to debugfs. Signed-off-by: Hans Verkuil Tested-by: Hans Verkuil --- drivers/media/i2c/adv7604.c | 90 ++++++++++++++++++++++++++++--------- 1 file changed, 70 insertions(+), 20 deletions(-) diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c index 48230d5109f0..3184a2fa1532 100644 --- a/drivers/media/i2c/adv7604.c +++ b/drivers/media/i2c/adv7604.c @@ -193,6 +193,9 @@ struct adv76xx_state { struct delayed_work delayed_work_enable_hotplug; bool restart_stdi_once; + struct dentry *debugfs_dir; + struct v4l2_debugfs_if *infoframes; + /* CEC */ struct cec_adapter *cec_adap; u8 cec_addr[ADV76XX_MAX_ADDRS]; @@ -2458,10 +2461,9 @@ static const struct adv76xx_cfg_read_infoframe adv76xx_cri[] = { { "Vendor", 0x10, 0xec, 0x54 } }; -static int adv76xx_read_infoframe(struct v4l2_subdev *sd, int index, - union hdmi_infoframe *frame) +static int adv76xx_read_infoframe_buf(struct v4l2_subdev *sd, int index, + u8 buf[V4L2_DEBUGFS_IF_MAX_LEN]) { - uint8_t buffer[32]; u8 len; int i; @@ -2472,27 +2474,20 @@ static int adv76xx_read_infoframe(struct v4l2_subdev *sd, int index, } for (i = 0; i < 3; i++) - buffer[i] = infoframe_read(sd, - adv76xx_cri[index].head_addr + i); + buf[i] = infoframe_read(sd, adv76xx_cri[index].head_addr + i); - len = buffer[2] + 1; + len = buf[2] + 1; - if (len + 3 > sizeof(buffer)) { + if (len + 3 > V4L2_DEBUGFS_IF_MAX_LEN) { v4l2_err(sd, "%s: invalid %s infoframe length %d\n", __func__, adv76xx_cri[index].desc, len); return -ENOENT; } for (i = 0; i < len; i++) - buffer[i + 3] = infoframe_read(sd, - adv76xx_cri[index].payload_addr + i); - - if (hdmi_infoframe_unpack(frame, buffer, len + 3) < 0) { - v4l2_err(sd, "%s: unpack of %s infoframe failed\n", __func__, - adv76xx_cri[index].desc); - return -ENOENT; - } - return 0; + buf[i + 3] = infoframe_read(sd, + adv76xx_cri[index].payload_addr + i); + return len + 3; } static void adv76xx_log_infoframes(struct v4l2_subdev *sd) @@ -2505,10 +2500,19 @@ static void adv76xx_log_infoframes(struct v4l2_subdev *sd) } for (i = 0; i < ARRAY_SIZE(adv76xx_cri); i++) { - union hdmi_infoframe frame; struct i2c_client *client = v4l2_get_subdevdata(sd); + u8 buffer[V4L2_DEBUGFS_IF_MAX_LEN] = {}; + union hdmi_infoframe frame; + int len; - if (!adv76xx_read_infoframe(sd, i, &frame)) + len = adv76xx_read_infoframe_buf(sd, i, buffer); + if (len < 0) + continue; + + if (hdmi_infoframe_unpack(&frame, buffer, len) < 0) + v4l2_err(sd, "%s: unpack of %s infoframe failed\n", + __func__, adv76xx_cri[i].desc); + else hdmi_infoframe_log(KERN_INFO, &client->dev, &frame); } } @@ -2686,6 +2690,41 @@ static int adv76xx_subscribe_event(struct v4l2_subdev *sd, } } +static ssize_t +adv76xx_debugfs_if_read(u32 type, void *priv, struct file *filp, + char __user *ubuf, size_t count, loff_t *ppos) +{ + u8 buf[V4L2_DEBUGFS_IF_MAX_LEN] = {}; + struct v4l2_subdev *sd = priv; + int index; + int len; + + if (!is_hdmi(sd)) + return 0; + + switch (type) { + case V4L2_DEBUGFS_IF_AVI: + index = 0; + break; + case V4L2_DEBUGFS_IF_AUDIO: + index = 1; + break; + case V4L2_DEBUGFS_IF_SPD: + index = 2; + break; + case V4L2_DEBUGFS_IF_HDMI: + index = 3; + break; + default: + return 0; + } + + len = adv76xx_read_infoframe_buf(sd, index, buf); + if (len > 0) + len = simple_read_from_buffer(ubuf, count, ppos, buf, len); + return len < 0 ? 0 : len; +} + static int adv76xx_registered(struct v4l2_subdev *sd) { struct adv76xx_state *state = to_state(sd); @@ -2693,9 +2732,16 @@ static int adv76xx_registered(struct v4l2_subdev *sd) int err; err = cec_register_adapter(state->cec_adap, &client->dev); - if (err) + if (err) { cec_delete_adapter(state->cec_adap); - return err; + return err; + } + state->debugfs_dir = debugfs_create_dir(sd->name, v4l2_debugfs_root()); + state->infoframes = v4l2_debugfs_if_alloc(state->debugfs_dir, + V4L2_DEBUGFS_IF_AVI | V4L2_DEBUGFS_IF_AUDIO | + V4L2_DEBUGFS_IF_SPD | V4L2_DEBUGFS_IF_HDMI, sd, + adv76xx_debugfs_if_read); + return 0; } static void adv76xx_unregistered(struct v4l2_subdev *sd) @@ -2703,6 +2749,10 @@ static void adv76xx_unregistered(struct v4l2_subdev *sd) struct adv76xx_state *state = to_state(sd); cec_unregister_adapter(state->cec_adap); + v4l2_debugfs_if_free(state->infoframes); + state->infoframes = NULL; + debugfs_remove_recursive(state->debugfs_dir); + state->debugfs_dir = NULL; } /* ----------------------------------------------------------------------- */