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Tue, 03 Sep 2024 07:54:34 -0700 (PDT) Received: from [127.0.1.1] ([2001:67c:2330:2002:af84:a410:1c4f:f793]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a89891d86cesm704677166b.171.2024.09.03.07.54.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Sep 2024 07:54:34 -0700 (PDT) From: Benjamin Bara Date: Tue, 03 Sep 2024 16:54:32 +0200 Subject: [PATCH v4 1/3] media: i2c: imx290: Remove CHIP_ID reg definition Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240903-imx290-avail-v4-1-e4a6c0837f0b@skidata.com> References: <20240903-imx290-avail-v4-0-e4a6c0837f0b@skidata.com> In-Reply-To: <20240903-imx290-avail-v4-0-e4a6c0837f0b@skidata.com> To: Mauro Carvalho Chehab , Manivannan Sadhasivam , Sakari Ailus Cc: Hans de Goede , Laurent Pinchart , Alexander Stein , Dave Stevenson , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Benjamin Bara X-Mailer: b4 0.14.1 X-LSpam-Score: -5.3 (-----) X-LSpam-Report: No, score=-5.3 required=5.0 tests=ARC_SIGNED=0.001,ARC_VALID=-0.1,BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DMARC_PASS=-0.001,FREEMAIL_FORGED_FROMDOMAIN=1,FREEMAIL_FROM=0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,RCVD_IN_VALIDITY_CERTIFIED=-3,RCVD_IN_VALIDITY_RPBL=1.31,RCVD_IN_VALIDITY_SAFE=-2,SPF_HELO_NONE=0.001,SPF_PASS=-0.001 autolearn=ham autolearn_force=no From: Benjamin Bara This register is not described in the public available imx290 datasheet. Additionally, a read returns '0x07d0' for an imx327lqr and also for an imx462, which means it cannot be used to distinguish between those two imx290 derivatives. Reviewed-by: Laurent Pinchart Signed-off-by: Benjamin Bara --- Changes since v3: - no change --- drivers/media/i2c/imx290.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index 4150e6e4b9a6..5e4aa7237152 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -78,7 +78,6 @@ #define IMX290_ADBIT2 CCI_REG8(0x317c) #define IMX290_ADBIT2_10BIT 0x12 #define IMX290_ADBIT2_12BIT 0x00 -#define IMX290_CHIP_ID CCI_REG16_LE(0x319a) #define IMX290_ADBIT3 CCI_REG8(0x31ec) #define IMX290_ADBIT3_10BIT 0x37 #define IMX290_ADBIT3_12BIT 0x0e From patchwork Tue Sep 3 14:54:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Bara X-Patchwork-Id: 103937 Received: from sy.mirrors.kernel.org ([147.75.48.161]) by linuxtv.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1slUw0-0000CP-31 for patchwork@linuxtv.org; 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Tue, 03 Sep 2024 07:54:36 -0700 (PDT) Received: from [127.0.1.1] ([2001:67c:2330:2002:af84:a410:1c4f:f793]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a89891d86cesm704677166b.171.2024.09.03.07.54.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Sep 2024 07:54:35 -0700 (PDT) From: Benjamin Bara Date: Tue, 03 Sep 2024 16:54:33 +0200 Subject: [PATCH v4 2/3] media: i2c: imx290: Avoid communication during probe() Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240903-imx290-avail-v4-2-e4a6c0837f0b@skidata.com> References: <20240903-imx290-avail-v4-0-e4a6c0837f0b@skidata.com> In-Reply-To: <20240903-imx290-avail-v4-0-e4a6c0837f0b@skidata.com> To: Mauro Carvalho Chehab , Manivannan Sadhasivam , Sakari Ailus Cc: Hans de Goede , Laurent Pinchart , Alexander Stein , Dave Stevenson , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Benjamin Bara X-Mailer: b4 0.14.1 X-LSpam-Score: -5.3 (-----) X-LSpam-Report: No, score=-5.3 required=5.0 tests=ARC_SIGNED=0.001,ARC_VALID=-0.1,BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DMARC_PASS=-0.001,FREEMAIL_FORGED_FROMDOMAIN=1,FREEMAIL_FROM=0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,RCVD_IN_VALIDITY_CERTIFIED=-3,RCVD_IN_VALIDITY_RPBL=1.31,RCVD_IN_VALIDITY_SAFE=-2,SPF_HELO_NONE=0.001,SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no From: Benjamin Bara As we don't know the mode during probe(), it doesn't make sense to update the sensors' registers with assumptions. As imx290_set_ctrl(), which is responsible for the happening communication, already ensures that there is no communication with a suspended sensor, put the sensor to suspend before calling it. To clarify the dependency of the PM runtime to the link of the subdev and the imx290 instance, put the block together. Suggested-by: Laurent Pinchart Signed-off-by: Benjamin Bara --- Changes since v3: - just rely on the already available runtime PM check in imx290_set_ctrl(), as suggested by Laurent. - add S-b for Laurent (thanks for the idea and the feedback). - reword commit message. --- drivers/media/i2c/imx290.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index 5e4aa7237152..47cfb6a9e9b5 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -1249,11 +1249,21 @@ static int imx290_subdev_init(struct imx290 *imx290) imx290->current_mode = &imx290_modes_ptr(imx290)[0]; + /* + * After linking the subdev with the imx290 instance, we are allowed to + * use the pm_runtime functions. Decrease the PM usage count. The device + * will get suspended after the autosuspend delay, turning the power + * off. However, the communication happening in imx290_ctrl_update() + * will already be prevented even before the delay. + */ v4l2_i2c_subdev_init(&imx290->sd, client, &imx290_subdev_ops); + imx290->sd.dev = imx290->dev; + pm_runtime_mark_last_busy(imx290->dev); + pm_runtime_put_autosuspend(imx290->dev); + imx290->sd.internal_ops = &imx290_internal_ops; imx290->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; - imx290->sd.dev = imx290->dev; imx290->sd.entity.ops = &imx290_subdev_entity_ops; imx290->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; @@ -1598,13 +1608,6 @@ static int imx290_probe(struct i2c_client *client) goto err_subdev; } - /* - * Decrease the PM usage count. The device will get suspended after the - * autosuspend delay, turning the power off. - */ - pm_runtime_mark_last_busy(dev); - pm_runtime_put_autosuspend(dev); - return 0; err_subdev: From patchwork Tue Sep 3 14:54:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Bara X-Patchwork-Id: 103938 Received: from ny.mirrors.kernel.org ([147.75.199.223]) by linuxtv.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1slUw3-0000Cd-1y for patchwork@linuxtv.org; Tue, 03 Sep 2024 14:55:11 +0000 Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ny.mirrors.kernel.org (Postfix) with ESMTPS id 411791C2388C for ; Tue, 3 Sep 2024 14:55:10 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 5DCEC186E51; 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From userspace perspective, there is no visible difference between a working and not-working subdevice (except when trying it out). This commit adds a simple preparation step, which includes an availability check, before the subdev is initialized. Signed-off-by: Benjamin Bara --- Changes since v3: - thanks to the feedback of Dave, I decided to switch to a write instead of a read for the availability check. - instead of only writing the STANDBY register, re-use stop_streaming() to ensure a proper state. - reword commit message. --- drivers/media/i2c/imx290.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index 47cfb6a9e9b5..49a5bf9c17da 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -1589,6 +1589,16 @@ static int imx290_probe(struct i2c_client *client) pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); + /* + * Make sure the sensor is available, in STANDBY and not streaming + * before the V4L2 subdev is initialized. + */ + ret = imx290_stop_streaming(imx290); + if (ret) { + ret = dev_err_probe(dev, ret, "Could not initialize device\n"); + goto err_pm; + } + /* Initialize the V4L2 subdev. */ ret = imx290_subdev_init(imx290); if (ret)