From patchwork Sat Apr 1 14:59:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 13197033 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59E28C6FD1D for ; Sat, 1 Apr 2023 15:00:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230082AbjDAPAx (ORCPT ); Sat, 1 Apr 2023 11:00:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230015AbjDAPAu (ORCPT ); Sat, 1 Apr 2023 11:00:50 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DAC81CBA4 for ; Sat, 1 Apr 2023 08:00:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680361199; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pkgaf5c4d1VhFzjzxgJCnOcCSZwf5jijmDkhU+8kZ8Y=; b=JjufkcWwtDhtYjhbKHH6KKZl/ZjetJWWVreCQ7jT2aLeKt+KBKcxAi3nvxhf9cDHnCfEQz jLMpIOL5hgycyooaB7Ho1XD8wun6P4156soFS4HfQnepCYdO6F1s2THVf8MF1EPWCvSE+2 QfqsYmXhZlZ8mFHeeJd6dNFK0PANigo= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-481-BoVStUByNLq80bc9suS1LQ-1; Sat, 01 Apr 2023 10:59:58 -0400 X-MC-Unique: BoVStUByNLq80bc9suS1LQ-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 983DE3C0253E; Sat, 1 Apr 2023 14:59:57 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.192.49]) by smtp.corp.redhat.com (Postfix) with ESMTP id 135C3400F59; Sat, 1 Apr 2023 14:59:55 +0000 (UTC) From: Hans de Goede To: Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , Kate Hsuan , Tsuchiya Yuto , Andy Shevchenko , Yury Luneff , Nable , andrey.i.trufanov@gmail.com, Fabio Aiuto , linux-media@vger.kernel.org, linux-staging@lists.linux.dev Subject: [PATCH 12/28] media: atomisp: gc0310: Add exposure and gain controls Date: Sat, 1 Apr 2023 16:59:10 +0200 Message-Id: <20230401145926.596216-13-hdegoede@redhat.com> In-Reply-To: <20230401145926.596216-1-hdegoede@redhat.com> References: <20230401145926.596216-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add exposure and gain controls. This allows controlling the exposure and gain through standard v4l2 IOCTLs. Signed-off-by: Hans de Goede --- .../media/atomisp/i2c/atomisp-gc0310.c | 93 ++++++++++++++++--- drivers/staging/media/atomisp/i2c/gc0310.h | 7 +- 2 files changed, 86 insertions(+), 14 deletions(-) diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c index 115493641010..6c0877ab96e3 100644 --- a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c +++ b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c @@ -57,14 +57,64 @@ static int gc0310_write_reg_array(struct i2c_client *client, return 0; } +static int gc0310_exposure_set(struct gc0310_device *dev, u32 exp) +{ + struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); + + return i2c_smbus_write_word_swapped(client, GC0310_AEC_PK_EXPO_H, exp); +} + +static int gc0310_gain_set(struct gc0310_device *dev, u32 gain) +{ + struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); + u8 again, dgain; + int ret; + + /* Taken from original driver, this never sets dgain lower then 32? */ + + /* Change 0 - 95 to 32 - 127 */ + gain += 32; + + if (gain < 64) { + again = 0x0; /* sqrt(2) */ + dgain = gain; + } else { + again = 0x2; /* 2 * sqrt(2) */ + dgain = gain / 2; + } + + ret = i2c_smbus_write_byte_data(client, GC0310_AGC_ADJ, again); + if (ret) + return ret; + + ret = i2c_smbus_write_byte_data(client, GC0310_DGC_ADJ, dgain); + if (ret) + return ret; + + return 0; +} + static int gc0310_s_ctrl(struct v4l2_ctrl *ctrl) { - int ret = 0; + struct gc0310_device *dev = + container_of(ctrl->handler, struct gc0310_device, ctrls.handler); + int ret; + + if (!dev->power_on) + return 0; switch (ctrl->id) { + case V4L2_CID_EXPOSURE: + ret = gc0310_exposure_set(dev, ctrl->val); + break; + case V4L2_CID_GAIN: + ret = gc0310_gain_set(dev, ctrl->val); + break; default: ret = -EINVAL; + break; } + return ret; } @@ -83,13 +133,18 @@ static int gc0310_init(struct v4l2_subdev *sd) /* set initial registers */ ret = gc0310_write_reg_array(client, gc0310_reset_register, ARRAY_SIZE(gc0310_reset_register)); + if (ret) + goto out_unlock; /* restore settings */ gc0310_res = gc0310_res_preview; N_RES = N_RES_PREVIEW; - mutex_unlock(&dev->input_lock); + /* restore value of all ctrls */ + ret = __v4l2_ctrl_handler_setup(&dev->ctrls.handler); +out_unlock: + mutex_unlock(&dev->input_lock); return ret; } @@ -545,6 +600,26 @@ static const struct v4l2_subdev_ops gc0310_ops = { .sensor = &gc0310_sensor_ops, }; +static int gc0310_init_controls(struct gc0310_device *dev) +{ + struct v4l2_ctrl_handler *hdl = &dev->ctrls.handler; + + v4l2_ctrl_handler_init(hdl, 2); + + /* Use same lock for controls as for everything else. */ + hdl->lock = &dev->input_lock; + dev->sd.ctrl_handler = hdl; + + dev->ctrls.exposure = + v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_EXPOSURE, 0, 4095, 1, 1023); + + /* 32 steps at base gain 1 + 64 half steps at base gain 2 */ + dev->ctrls.gain = + v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_GAIN, 0, 95, 1, 31); + + return hdl->error; +} + static void gc0310_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); @@ -556,7 +631,7 @@ static void gc0310_remove(struct i2c_client *client) v4l2_device_unregister_subdev(sd); media_entity_cleanup(&dev->sd.entity); - v4l2_ctrl_handler_free(&dev->ctrl_handler); + v4l2_ctrl_handler_free(&dev->ctrls.handler); kfree(dev); } @@ -595,21 +670,13 @@ static int gc0310_probe(struct i2c_client *client) dev->pad.flags = MEDIA_PAD_FL_SOURCE; dev->format.code = MEDIA_BUS_FMT_SGRBG8_1X8; dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; - ret = v4l2_ctrl_handler_init(&dev->ctrl_handler, 0); + + ret = gc0310_init_controls(dev); if (ret) { gc0310_remove(client); return ret; } - if (dev->ctrl_handler.error) { - gc0310_remove(client); - return dev->ctrl_handler.error; - } - - /* Use same lock for controls as for everything else. */ - dev->ctrl_handler.lock = &dev->input_lock; - dev->sd.ctrl_handler = &dev->ctrl_handler; - ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad); if (ret) gc0310_remove(client); diff --git a/drivers/staging/media/atomisp/i2c/gc0310.h b/drivers/staging/media/atomisp/i2c/gc0310.h index 540334bc7b0e..c15ca2b807f9 100644 --- a/drivers/staging/media/atomisp/i2c/gc0310.h +++ b/drivers/staging/media/atomisp/i2c/gc0310.h @@ -126,12 +126,17 @@ struct gc0310_device { struct media_pad pad; struct v4l2_mbus_framefmt format; struct mutex input_lock; - struct v4l2_ctrl_handler ctrl_handler; struct camera_sensor_platform_data *platform_data; struct gc0310_resolution *res; u8 type; bool power_on; + + struct gc0310_ctrls { + struct v4l2_ctrl_handler handler; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *gain; + } ctrls; }; /**