From patchwork Fri Nov 6 06:40:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bingbu Cao X-Patchwork-Id: 11886213 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2CC98921 for ; Fri, 6 Nov 2020 06:43:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1359920A8B for ; Fri, 6 Nov 2020 06:43:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726309AbgKFGnt (ORCPT ); Fri, 6 Nov 2020 01:43:49 -0500 Received: from mga11.intel.com ([192.55.52.93]:23052 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725828AbgKFGnt (ORCPT ); Fri, 6 Nov 2020 01:43:49 -0500 IronPort-SDR: nuns4aOjODvOOXSoGa/tT1z4LtCiDaPm9zNdmJSrBzxcIoLOQL7XJ44fSaw3879lu/pt6adT9R bwb2mULZ3oVQ== X-IronPort-AV: E=McAfee;i="6000,8403,9796"; a="166000809" X-IronPort-AV: E=Sophos;i="5.77,455,1596524400"; d="scan'208";a="166000809" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Nov 2020 22:43:49 -0800 IronPort-SDR: VoE66q5NvP3WqE9PS39guQhI9r0hwWp4u9e2MvMfBOhc3BKMD3f5QSMnt9NcT4jVEwdmTB1Bhq NjVyJoA8jbTA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,455,1596524400"; d="scan'208";a="354596683" Received: from ipu5-build.bj.intel.com ([10.238.232.196]) by fmsmga004.fm.intel.com with ESMTP; 05 Nov 2020 22:43:47 -0800 From: Bingbu Cao To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com Cc: tfiga@chromium.org, senozhatsky@chromium.org, bingbu.cao@intel.com, bingbu.cao@linux.intel.com, qingwu.zhang@intel.com Subject: [PATCH 2/2] media: ov2740: allow OTP data access during streaming Date: Fri, 6 Nov 2020 14:40:44 +0800 Message-Id: <1604644844-1551-2-git-send-email-bingbu.cao@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1604644844-1551-1-git-send-email-bingbu.cao@intel.com> References: <1604644844-1551-1-git-send-email-bingbu.cao@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org OTP data access of ov2740 need enable the streaming mode to load and it could be done in any time, so driver need allow the OTP data access during streaming instead of return EBUSY, this patch try to read the OTP data out in STREAMON if OTP data is not ready before first time streaming start. Signed-off-by: Bingbu Cao --- drivers/media/i2c/ov2740.c | 135 ++++++++++++++++++++++++--------------------- 1 file changed, 71 insertions(+), 64 deletions(-) diff --git a/drivers/media/i2c/ov2740.c b/drivers/media/i2c/ov2740.c index 716c26c13c97..198ce5b37888 100644 --- a/drivers/media/i2c/ov2740.c +++ b/drivers/media/i2c/ov2740.c @@ -599,13 +599,84 @@ static void ov2740_update_pad_format(const struct ov2740_mode *mode, fmt->field = V4L2_FIELD_NONE; } +static int ov2740_load_otp_data(struct nvm_data *nvm) +{ + struct i2c_client *client = nvm->client; + struct ov2740 *ov2740 = to_ov2740(i2c_get_clientdata(client)); + u32 isp_ctrl00 = 0; + u32 isp_ctrl01 = 0; + int ret; + + ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, &isp_ctrl00); + if (ret) { + dev_err(&client->dev, "failed to read ISP CTRL00\n"); + goto exit; + } + ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, &isp_ctrl01); + if (ret) { + dev_err(&client->dev, "failed to read ISP CTRL01\n"); + goto exit; + } + + /* Clear bit 5 of ISP CTRL00 */ + ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, + isp_ctrl00 & ~BIT(5)); + if (ret) { + dev_err(&client->dev, "failed to write ISP CTRL00\n"); + goto exit; + } + + /* Clear bit 7 of ISP CTRL01 */ + ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, + isp_ctrl01 & ~BIT(7)); + if (ret) { + dev_err(&client->dev, "failed to write ISP CTRL01\n"); + goto exit; + } + + ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1, + OV2740_MODE_STREAMING); + if (ret) { + dev_err(&client->dev, "failed to set streaming mode\n"); + goto exit; + } + + /* + * Users are not allowed to access OTP-related registers and memory + * during the 20 ms period after streaming starts (0x100 = 0x01). + */ + msleep(20); + + ret = regmap_bulk_read(nvm->regmap, OV2740_REG_OTP_CUSTOMER, + nvm->nvm_buffer, CUSTOMER_USE_OTP_SIZE); + if (ret) { + dev_err(&client->dev, "failed to read OTP data, ret %d\n", ret); + goto exit; + } + + ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1, + OV2740_MODE_STANDBY); + ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, isp_ctrl01); + ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, isp_ctrl00); + +exit: + return ret; +} + static int ov2740_start_streaming(struct ov2740 *ov2740) { struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd); + struct nvm_data *nvm = ov2740->nvm; const struct ov2740_reg_list *reg_list; int link_freq_index; int ret = 0; + if (nvm && !nvm->ready) { + ret = ov2740_load_otp_data(nvm); + if (!ret) + nvm->ready = true; + } + link_freq_index = ov2740->cur_mode->link_freq_index; reg_list = &link_freq_configs[link_freq_index].reg_list; ret = ov2740_write_reg_list(ov2740, reg_list); @@ -935,70 +1006,6 @@ static int ov2740_remove(struct i2c_client *client) return 0; } -static int ov2740_load_otp_data(struct nvm_data *nvm) -{ - struct i2c_client *client = nvm->client; - struct ov2740 *ov2740 = to_ov2740(i2c_get_clientdata(client)); - u32 isp_ctrl00 = 0; - u32 isp_ctrl01 = 0; - int ret; - - ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, &isp_ctrl00); - if (ret) { - dev_err(&client->dev, "failed to read ISP CTRL00\n"); - goto exit; - } - ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, &isp_ctrl01); - if (ret) { - dev_err(&client->dev, "failed to read ISP CTRL01\n"); - goto exit; - } - - /* Clear bit 5 of ISP CTRL00 */ - ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, - isp_ctrl00 & ~BIT(5)); - if (ret) { - dev_err(&client->dev, "failed to write ISP CTRL00\n"); - goto exit; - } - - /* Clear bit 7 of ISP CTRL01 */ - ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, - isp_ctrl01 & ~BIT(7)); - if (ret) { - dev_err(&client->dev, "failed to write ISP CTRL01\n"); - goto exit; - } - - ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1, - OV2740_MODE_STREAMING); - if (ret) { - dev_err(&client->dev, "failed to set streaming mode\n"); - goto exit; - } - - /* - * Users are not allowed to access OTP-related registers and memory - * during the 20 ms period after streaming starts (0x100 = 0x01). - */ - msleep(20); - - ret = regmap_bulk_read(nvm->regmap, OV2740_REG_OTP_CUSTOMER, - nvm->nvm_buffer, CUSTOMER_USE_OTP_SIZE); - if (ret) { - dev_err(&client->dev, "failed to read OTP data, ret %d\n", ret); - goto exit; - } - - ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1, - OV2740_MODE_STANDBY); - ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, isp_ctrl01); - ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, isp_ctrl00); - -exit: - return ret; -} - static int ov2740_nvmem_read(void *priv, unsigned int off, void *val, size_t count) {