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Mon, 02 Sep 2024 08:57:35 -0700 (PDT) Received: from [127.0.1.1] ([2001:67c:2330:2002:af84:a410:1c4f:f793]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a89891d6f87sm570951366b.158.2024.09.02.08.57.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Sep 2024 08:57:35 -0700 (PDT) From: bbara93@gmail.com Date: Mon, 02 Sep 2024 17:57:26 +0200 Subject: [PATCH v3 1/7] media: i2c: imx290: Define standby mode values Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240902-imx290-avail-v3-1-b32a12799fed@skidata.com> References: <20240902-imx290-avail-v3-0-b32a12799fed@skidata.com> In-Reply-To: <20240902-imx290-avail-v3-0-b32a12799fed@skidata.com> To: Mauro Carvalho Chehab , Manivannan Sadhasivam , Sakari Ailus Cc: Hans de Goede , Laurent Pinchart , Alexander Stein , 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 The imx290 datasheet states that the IMX290_STANDBY register has two values: 0 for operating and 1 for standby. Define and use them. Signed-off-by: Benjamin Bara --- Changes since v2: - new, split out from the previous 1/2 --- drivers/media/i2c/imx290.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index 4150e6e4b9a6..1c97f9650eb4 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -29,6 +29,8 @@ #include #define IMX290_STANDBY CCI_REG8(0x3000) +#define IMX290_STANDBY_OPERATING 0x00 +#define IMX290_STANDBY_STANDBY BIT(0) #define IMX290_REGHOLD CCI_REG8(0x3001) #define IMX290_XMSTA CCI_REG8(0x3002) #define IMX290_ADBIT CCI_REG8(0x3005) @@ -1016,7 +1018,8 @@ static int imx290_start_streaming(struct imx290 *imx290, return ret; } - cci_write(imx290->regmap, IMX290_STANDBY, 0x00, &ret); + cci_write(imx290->regmap, IMX290_STANDBY, IMX290_STANDBY_OPERATING, + &ret); msleep(30); @@ -1029,7 +1032,7 @@ static int imx290_stop_streaming(struct imx290 *imx290) { int ret = 0; - cci_write(imx290->regmap, IMX290_STANDBY, 0x01, &ret); + cci_write(imx290->regmap, IMX290_STANDBY, IMX290_STANDBY_STANDBY, &ret); msleep(30); From patchwork Mon Sep 2 15:57:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Bara X-Patchwork-Id: 103895 Received: from sv.mirrors.kernel.org ([139.178.88.99]) by linuxtv.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sl9RK-00023u-1Z for patchwork@linuxtv.org; Mon, 02 Sep 2024 15:58:03 +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 sv.mirrors.kernel.org (Postfix) with ESMTPS id 142AC283E90 for ; Mon, 2 Sep 2024 15:58:02 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C0CD61AB6C0; Mon, 2 Sep 2024 15:57:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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This e.g. means that one cannot set VBLANK below 45 (vmax_min - height), although theoretically the minimum is 30 (720p mode). Define the absolute possible/supported ranges to have them available later. Signed-off-by: Benjamin Bara --- Changes since v2: - new --- drivers/media/i2c/imx290.c | 36 ++++++++++++++++++++++++++++++++---- 1 file changed, 32 insertions(+), 4 deletions(-) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index 1c97f9650eb4..466492bab600 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -499,6 +499,10 @@ static const struct imx290_clk_cfg imx290_720p_clock_config[] = { }; /* Mode configs */ +#define WIDTH_720P 1280 +#define HEIGHT_720P 720 +#define MINIMUM_WIDTH WIDTH_720P +#define MINIMUM_HEIGHT HEIGHT_720P static const struct imx290_mode imx290_modes_2lanes[] = { { .width = 1920, @@ -512,8 +516,8 @@ static const struct imx290_mode imx290_modes_2lanes[] = { .clk_cfg = imx290_1080p_clock_config, }, { - .width = 1280, - .height = 720, + .width = WIDTH_720P, + .height = HEIGHT_720P, .hmax_min = 3300, .vmax_min = 750, .link_freq_index = FREQ_INDEX_720P, @@ -537,8 +541,8 @@ static const struct imx290_mode imx290_modes_4lanes[] = { .clk_cfg = imx290_1080p_clock_config, }, { - .width = 1280, - .height = 720, + .width = WIDTH_720P, + .height = HEIGHT_720P, .hmax_min = 3300, .vmax_min = 750, .link_freq_index = FREQ_INDEX_720P, @@ -846,6 +850,30 @@ static const char * const imx290_test_pattern_menu[] = { "000/555h Toggle Pattern", }; +/* absolute supported control ranges */ +#define HBLANK_MAX (IMX290_HMAX_MAX - MINIMUM_WIDTH) +#define VBLANK_MAX (IMX290_VMAX_MAX - MINIMUM_HEIGHT) +static unsigned int imx290_get_blank_min(const struct imx290 *imx290, bool v) +{ + const struct imx290_mode *modes = imx290_modes_ptr(imx290); + unsigned int min = UINT_MAX; + int i; + + for (i = 0; i < imx290_modes_num(imx290); i++) { + unsigned int tmp; + + if (v) + tmp = modes[i].hmax_min - modes[i].width; + else + tmp = modes[i].vmax_min - modes[i].height; + + if (tmp < min) + min = tmp; + } + + return min; +} + static void imx290_ctrl_update(struct imx290 *imx290, const struct imx290_mode *mode) { From patchwork Mon Sep 2 15:57:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Bara X-Patchwork-Id: 103896 Received: from am.mirrors.kernel.org ([147.75.80.249]) by linuxtv.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sl9RV-00024G-0o for patchwork@linuxtv.org; 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Mon, 02 Sep 2024 08:57:37 -0700 (PDT) Received: from [127.0.1.1] ([2001:67c:2330:2002:af84:a410:1c4f:f793]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a89891d6f87sm570951366b.158.2024.09.02.08.57.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Sep 2024 08:57:37 -0700 (PDT) From: bbara93@gmail.com Date: Mon, 02 Sep 2024 17:57:28 +0200 Subject: [PATCH v3 3/7] 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: <20240902-imx290-avail-v3-3-b32a12799fed@skidata.com> References: <20240902-imx290-avail-v3-0-b32a12799fed@skidata.com> In-Reply-To: <20240902-imx290-avail-v3-0-b32a12799fed@skidata.com> To: Mauro Carvalho Chehab , Manivannan Sadhasivam , Sakari Ailus Cc: Hans de Goede , Laurent Pinchart , Alexander Stein , 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 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 v2: - picked up R-b of Laurent (thx!) --- 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 466492bab600..6812e7cb9e23 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -80,7 +80,6 @@ #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 Mon Sep 2 15:57:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Bara X-Patchwork-Id: 103898 Received: from am.mirrors.kernel.org ([147.75.80.249]) by linuxtv.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sl9Rq-00024s-24 for patchwork@linuxtv.org; 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Mon, 02 Sep 2024 08:57:37 -0700 (PDT) Received: from [127.0.1.1] ([2001:67c:2330:2002:af84:a410:1c4f:f793]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a89891d6f87sm570951366b.158.2024.09.02.08.57.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Sep 2024 08:57:37 -0700 (PDT) From: bbara93@gmail.com Date: Mon, 02 Sep 2024 17:57:29 +0200 Subject: [PATCH v3 4/7] media: i2c: imx290: Introduce initial "off" mode & link freq Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240902-imx290-avail-v3-4-b32a12799fed@skidata.com> References: <20240902-imx290-avail-v3-0-b32a12799fed@skidata.com> In-Reply-To: <20240902-imx290-avail-v3-0-b32a12799fed@skidata.com> To: Mauro Carvalho Chehab , Manivannan Sadhasivam , Sakari Ailus Cc: Hans de Goede , Laurent Pinchart , Alexander Stein , 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 To be compliant to the V4L2 API, the driver currently "randomly" decides on one of the two supported modes which also implies a link frequency. Add a new mode and frequency which symbolize that the sensor is not in use. This can be used as a default value during probe() and enables us to avoid communication with the sensor. Signed-off-by: Benjamin Bara --- Changes since v2: - new --- drivers/media/i2c/imx290.c | 29 +++++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index 6812e7cb9e23..ece4d66001f5 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -425,14 +425,17 @@ static const struct imx290_csi_cfg imx290_csi_297mhz = { /* supported link frequencies */ #define FREQ_INDEX_1080P 0 #define FREQ_INDEX_720P 1 +#define FREQ_INDEX_OFF 2 static const s64 imx290_link_freq_2lanes[] = { [FREQ_INDEX_1080P] = 445500000, [FREQ_INDEX_720P] = 297000000, + [FREQ_INDEX_OFF] = 0, }; static const s64 imx290_link_freq_4lanes[] = { [FREQ_INDEX_1080P] = 222750000, [FREQ_INDEX_720P] = 148500000, + [FREQ_INDEX_OFF] = 0, }; /* @@ -552,6 +555,10 @@ static const struct imx290_mode imx290_modes_4lanes[] = { }, }; +static const struct imx290_mode imx290_mode_off = { + .link_freq_index = FREQ_INDEX_OFF, +}; + static inline const struct imx290_mode *imx290_modes_ptr(const struct imx290 *imx290) { if (imx290->nlanes == 2) @@ -876,10 +883,19 @@ static unsigned int imx290_get_blank_min(const struct imx290 *imx290, bool v) static void imx290_ctrl_update(struct imx290 *imx290, const struct imx290_mode *mode) { - unsigned int hblank_min = mode->hmax_min - mode->width; - unsigned int hblank_max = IMX290_HMAX_MAX - mode->width; - unsigned int vblank_min = mode->vmax_min - mode->height; - unsigned int vblank_max = IMX290_VMAX_MAX - mode->height; + unsigned int hblank_min, hblank_max, vblank_min, vblank_max; + + if (mode == &imx290_mode_off) { + hblank_min = imx290_get_blank_min(imx290, false); + hblank_max = HBLANK_MAX; + vblank_min = imx290_get_blank_min(imx290, true); + vblank_max = VBLANK_MAX; + } else { + hblank_min = mode->hmax_min - mode->width; + hblank_max = IMX290_HMAX_MAX - mode->width; + vblank_min = mode->vmax_min - mode->height; + vblank_max = IMX290_VMAX_MAX - mode->height; + } __v4l2_ctrl_s_ctrl(imx290->link_freq, mode->link_freq_index); @@ -932,7 +948,8 @@ static int imx290_ctrl_init(struct imx290 *imx290) imx290->link_freq = v4l2_ctrl_new_int_menu(&imx290->ctrls, &imx290_ctrl_ops, V4L2_CID_LINK_FREQ, - imx290_link_freqs_num(imx290) - 1, 0, + imx290_link_freqs_num(imx290) - 1, + FREQ_INDEX_OFF, imx290_link_freqs_ptr(imx290)); if (imx290->link_freq) imx290->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; @@ -1278,7 +1295,7 @@ static int imx290_subdev_init(struct imx290 *imx290) struct v4l2_subdev_state *state; int ret; - imx290->current_mode = &imx290_modes_ptr(imx290)[0]; + imx290->current_mode = &imx290_mode_off; v4l2_i2c_subdev_init(&imx290->sd, client, &imx290_subdev_ops); imx290->sd.internal_ops = &imx290_internal_ops; From patchwork Mon Sep 2 15:57:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Bara X-Patchwork-Id: 103897 Received: from sv.mirrors.kernel.org ([139.178.88.99]) by linuxtv.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sl9Rk-00024Z-10 for patchwork@linuxtv.org; Mon, 02 Sep 2024 15:58:28 +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 sv.mirrors.kernel.org (Postfix) with ESMTPS id E53C8284045 for ; 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Avoid the communication in this case. Signed-off-by: Benjamin Bara --- Changes since v2: - new --- drivers/media/i2c/imx290.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index ece4d66001f5..9610e9fd2059 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -769,6 +769,10 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl) if (!pm_runtime_get_if_in_use(imx290->dev)) return 0; + /* V4L2 controls values will be applied only when mode is known */ + if (imx290->current_mode == &imx290_mode_off) + return 0; + state = v4l2_subdev_get_locked_active_state(&imx290->sd); format = v4l2_subdev_state_get_format(state, 0); From patchwork Mon Sep 2 15:57:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Bara X-Patchwork-Id: 103900 Received: from sv.mirrors.kernel.org ([139.178.88.99]) by linuxtv.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sl9SA-00026o-2x for patchwork@linuxtv.org; 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Mon, 02 Sep 2024 08:57:39 -0700 (PDT) Received: from [127.0.1.1] ([2001:67c:2330:2002:af84:a410:1c4f:f793]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a89891d6f87sm570951366b.158.2024.09.02.08.57.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Sep 2024 08:57:38 -0700 (PDT) From: bbara93@gmail.com Date: Mon, 02 Sep 2024 17:57:31 +0200 Subject: [PATCH v3 6/7] media: i2c: imx290: Check for availability in probe() Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240902-imx290-avail-v3-6-b32a12799fed@skidata.com> References: <20240902-imx290-avail-v3-0-b32a12799fed@skidata.com> In-Reply-To: <20240902-imx290-avail-v3-0-b32a12799fed@skidata.com> To: Mauro Carvalho Chehab , Manivannan Sadhasivam , Sakari Ailus Cc: Hans de Goede , Laurent Pinchart , Alexander Stein , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Benjamin Bara X-Mailer: b4 0.14.1 X-LSpam-Score: -7.6 (-------) X-LSpam-Report: No, score=-7.6 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_DNSWL_MED=-2.3,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 Currently, the V4L2 subdevice is also created when the device is not available/connected. 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 availability check before starting with the subdev initialization to error out instead. Signed-off-by: Benjamin Bara --- Changes since v2: - the new 1/8 is split out - use dev_err_probe() (thx Laurent) --- drivers/media/i2c/imx290.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index 9610e9fd2059..6b292bbb0856 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -1571,6 +1571,7 @@ static int imx290_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct imx290 *imx290; + u64 val; int ret; imx290 = devm_kzalloc(dev, sizeof(*imx290), GFP_KERNEL); @@ -1631,6 +1632,17 @@ 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 before V4L2 subdev init. */ + ret = cci_read(imx290->regmap, IMX290_STANDBY, &val, NULL); + if (ret) { + ret = dev_err_probe(dev, -ENODEV, "Failed to detect sensor\n"); + goto err_pm; + } + if (val != IMX290_STANDBY_STANDBY) { + ret = dev_err_probe(dev, -ENODEV, "Sensor is not in standby\n"); 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To have a somewhat defined policy for now, make a decision based on the power supplies of the sensor. If they are enabled anyways, communicate with the powered sensor for an availability check. Otherwise, create the subdevice without knowing whether the sensor is connected or not. Signed-off-by: Benjamin Bara --- Changes since v2: - new --- drivers/media/i2c/imx290.c | 82 ++++++++++++++++++++++++++++++++-------------- 1 file changed, 57 insertions(+), 25 deletions(-) diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c index 6b292bbb0856..338b2c5ea547 100644 --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -1354,6 +1354,17 @@ static void imx290_subdev_cleanup(struct imx290 *imx290) * Power management */ +static bool is_imx290_power_on(struct imx290 *imx) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(imx->supplies); i++) + if (!regulator_is_enabled(imx->supplies[i].consumer)) + return false; + + return true; +} + static int imx290_power_on(struct imx290 *imx290) { int ret; @@ -1571,6 +1582,7 @@ static int imx290_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct imx290 *imx290; + bool power_on; u64 val; int ret; @@ -1611,36 +1623,54 @@ static int imx290_probe(struct i2c_client *client) return ret; /* - * Enable power management. The driver supports runtime PM, but needs to - * work when runtime PM is disabled in the kernel. To that end, power - * the sensor on manually here. + * Privacy mode: if the regulators are not enabled, avoid enabling them. + * In case the regulators are enabled, we still want to make sure that + * the regulators know that they have another consumer, therefore run + * the powering sequence. */ - ret = imx290_power_on(imx290); - if (ret < 0) { - dev_err(dev, "Could not power on the device\n"); - return ret; + power_on = is_imx290_power_on(imx290); + dev_dbg(dev, "%s: power on: %d\n", __func__, power_on); + if (power_on) { + /* + * Enable power management. The driver supports runtime PM, but + * needs to work when runtime PM is disabled in the kernel. To + * that end, power the sensor on manually here. + */ + ret = imx290_power_on(imx290); + if (ret < 0) { + dev_err(dev, "Could not power on the device\n"); + return ret; + } + + /* + * Enable runtime PM with autosuspend. As the device has been + * powered manually, mark it as active, and increase the usage + * count without resuming the device. + */ + pm_runtime_set_active(dev); + pm_runtime_get_noresume(dev); } - /* - * Enable runtime PM with autosuspend. As the device has been powered - * manually, mark it as active, and increase the usage count without - * resuming the device. - */ - pm_runtime_set_active(dev); - pm_runtime_get_noresume(dev); pm_runtime_enable(dev); pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); - /* Make sure the sensor is available before V4L2 subdev init. */ - ret = cci_read(imx290->regmap, IMX290_STANDBY, &val, NULL); - if (ret) { - ret = dev_err_probe(dev, -ENODEV, "Failed to detect sensor\n"); - goto err_pm; - } - if (val != IMX290_STANDBY_STANDBY) { - ret = dev_err_probe(dev, -ENODEV, "Sensor is not in standby\n"); - goto err_pm; + /* + * Make sure the sensor is available before V4L2 subdev init. + * This only works when the sensor is powered. + */ + if (power_on) { + ret = cci_read(imx290->regmap, IMX290_STANDBY, &val, NULL); + if (ret) { + ret = dev_err_probe(dev, -ENODEV, + "Failed to detect sensor\n"); + goto err_pm; + } + if (val != IMX290_STANDBY_STANDBY) { + ret = dev_err_probe(dev, -ENODEV, + "Sensor is not in standby\n"); + goto err_pm; + } } /* Initialize the V4L2 subdev. */ @@ -1666,8 +1696,10 @@ static int imx290_probe(struct i2c_client *client) * 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); + if (power_on) { + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + } return 0;