From patchwork Wed Oct 5 19:06:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 12999582 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 6A8D2C433FE for ; Wed, 5 Oct 2022 19:07:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231407AbiJETHD (ORCPT ); Wed, 5 Oct 2022 15:07:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231411AbiJETHB (ORCPT ); Wed, 5 Oct 2022 15:07:01 -0400 Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DF4478BE6 for ; Wed, 5 Oct 2022 12:07:00 -0700 (PDT) Received: (Authenticated sender: jacopo@jmondi.org) by mail.gandi.net (Postfix) with ESMTPSA id C9DB2FF80C; Wed, 5 Oct 2022 19:06:55 +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 Subject: [PATCH 09/10] media: ar0521: Rework startup sequence Date: Wed, 5 Oct 2022 21:06:12 +0200 Message-Id: <20221005190613.394277-10-jacopo@jmondi.org> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221005190613.394277-1-jacopo@jmondi.org> References: <20221005190613.394277-1-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 those operations in the ar0521_set_stream() caller and remove ar0521_write_mode(). However maintain the ar0521_calc_pll() function separated as it is used during pad format configuration to update the PIXEL_RATE control value. Signed-off-by: Jacopo Mondi Reviewed-by: Dave Stevenson --- drivers/media/i2c/ar0521.c | 50 ++++++++++++-------------------------- 1 file changed, 16 insertions(+), 34 deletions(-) -- 2.37.3 diff --git a/drivers/media/i2c/ar0521.c b/drivers/media/i2c/ar0521.c index d46a51332964..670fa33acc6f 100644 --- a/drivers/media/i2c/ar0521.c +++ b/drivers/media/i2c/ar0521.c @@ -329,7 +329,7 @@ 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; unsigned int link_freq; @@ -403,7 +403,7 @@ 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), @@ -414,36 +414,9 @@ 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) @@ -455,8 +428,17 @@ 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; @@ -562,7 +544,7 @@ 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