From patchwork Fri Nov 4 14:24:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 13032100 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 C1A51C433FE for ; Fri, 4 Nov 2022 14:28:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231978AbiKDO2S (ORCPT ); Fri, 4 Nov 2022 10:28:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43582 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231991AbiKDO1f (ORCPT ); Fri, 4 Nov 2022 10:27:35 -0400 Received: from relay11.mail.gandi.net (relay11.mail.gandi.net [IPv6:2001:4b98:dc4:8::231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CBB3B31DC8 for ; Fri, 4 Nov 2022 07:25:29 -0700 (PDT) Received: (Authenticated sender: jacopo@jmondi.org) by mail.gandi.net (Postfix) with ESMTPSA id D9A2E100011; Fri, 4 Nov 2022 14:25:26 +0000 (UTC) From: Jacopo Mondi To: =?utf-8?q?Krzysztof_Ha=C5=82asa?= , Mauro Carvalho Chehab , Sakari Ailus , Laurent Pinchart Cc: Jacopo Mondi , linux-media@vger.kernel.org, Dave Stevenson Subject: [PATCH v3 09/10] media: ar0521: Rework startup sequence Date: Fri, 4 Nov 2022 15:24:52 +0100 Message-Id: <20221104142452.117135-10-jacopo@jmondi.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221104142452.117135-1-jacopo@jmondi.org> References: <20221104142452.117135-1-jacopo@jmondi.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The ar0521_write_mode() function explicitly programs the exposure time register and the test pattern register, which are now setup by the call to __v4l2_ctrl_handler_setup() in ar0521_set_stream(). Removing those register writes from ar0521_write_mode() reduces the function to two operations: geometry configuration and pll configuration. Move geomerty configuration in the ar0521_set_stream() caller and rename ar0521_write_mode() to ar0521_pll_config(). Signed-off-by: Jacopo Mondi Reviewed-by: Dave Stevenson --- drivers/media/i2c/ar0521.c | 50 ++++++++++++-------------------------- 1 file changed, 16 insertions(+), 34 deletions(-) -- 2.38.1 diff --git a/drivers/media/i2c/ar0521.c b/drivers/media/i2c/ar0521.c index 323f583e2029..91fa4cba12f6 100644 --- a/drivers/media/i2c/ar0521.c +++ b/drivers/media/i2c/ar0521.c @@ -278,7 +278,7 @@ static u32 calc_pll(struct ar0521_dev *sensor, u32 freq, u16 *pre_ptr, u16 *mult return pll; } -static void ar0521_calc_mode(struct ar0521_dev *sensor) +static void ar0521_calc_pll(struct ar0521_dev *sensor) { unsigned int pixel_clock; u16 pre, mult; @@ -342,7 +342,7 @@ static void ar0521_calc_mode(struct ar0521_dev *sensor) sensor->pll.mult = sensor->pll.mult2 = mult; } -static int ar0521_write_mode(struct ar0521_dev *sensor) +static int ar0521_pll_config(struct ar0521_dev *sensor) { __be16 pll_regs[] = { be(AR0521_REG_VT_PIX_CLK_DIV), @@ -353,36 +353,9 @@ static int ar0521_write_mode(struct ar0521_dev *sensor) /* 0x308 */ be(sensor->pll.vt_pix * 2), /* op_pix_clk_div = 2 * vt_pix_clk_div */ /* 0x30A */ be(1) /* op_sys_clk_div */ }; - int ret; - - /* Stop streaming for just a moment */ - ret = ar0521_write_reg(sensor, AR0521_REG_RESET, - AR0521_REG_RESET_DEFAULTS); - if (ret) - return ret; - - ret = ar0521_set_geometry(sensor); - if (ret) - return ret; - - ret = ar0521_write_regs(sensor, pll_regs, ARRAY_SIZE(pll_regs)); - if (ret) - return ret; - - ret = ar0521_write_reg(sensor, AR0521_REG_COARSE_INTEGRATION_TIME, - sensor->ctrls.exposure->val); - if (ret) - return ret; - - ret = ar0521_write_reg(sensor, AR0521_REG_RESET, - AR0521_REG_RESET_DEFAULTS | - AR0521_REG_RESET_STREAM); - if (ret) - return ret; - ret = ar0521_write_reg(sensor, AR0521_REG_TEST_PATTERN_MODE, - sensor->ctrls.test_pattern->val); - return ret; + ar0521_calc_pll(sensor); + return ar0521_write_regs(sensor, pll_regs, ARRAY_SIZE(pll_regs)); } static int ar0521_set_stream(struct ar0521_dev *sensor, bool on) @@ -394,8 +367,17 @@ static int ar0521_set_stream(struct ar0521_dev *sensor, bool on) if (ret < 0) return ret; - ar0521_calc_mode(sensor); - ret = ar0521_write_mode(sensor); + /* Stop streaming for just a moment */ + ret = ar0521_write_reg(sensor, AR0521_REG_RESET, + AR0521_REG_RESET_DEFAULTS); + if (ret) + return ret; + + ret = ar0521_set_geometry(sensor); + if (ret) + return ret; + + ret = ar0521_pll_config(sensor); if (ret) goto err; @@ -501,7 +483,7 @@ static int ar0521_set_fmt(struct v4l2_subdev *sd, } sensor->fmt = format->format; - ar0521_calc_mode(sensor); + ar0521_calc_pll(sensor); /* * Update the exposure and blankings limits. Blankings are also reset