From patchwork Mon Apr 14 07:39:14 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wentao Liang X-Patchwork-Id: 14049866 Received: from cstnet.cn (smtp84.cstnet.cn [159.226.251.84]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3FD09237172; Mon, 14 Apr 2025 07:39:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.84 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744616382; cv=none; b=hCHEVXxphqH00phmylM3ne9YZl5E7StnT7k+UZBF9MKEZkzzUHFav0kbzhCtGoUxlyUa+yoV8b0pJUHUP4llWexfPt39rHrXhMLmAwLFRQUVtko/T+FVvyzAKKSdcMDLjVFQtzuiiHb1Nr366xhW9FNbUCv1ZKhs5frnaAzsICI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744616382; c=relaxed/simple; bh=khWE9cX70xPph8s7rn9jBXuJtbTTleSYbDejswZO7ds=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=tlVXkgExSupt1pFZKv5xqyI8M/AU+5EvRrwnAHQj/mLPtSr5U66iSMM8fuYJ5INjWnbw+QZBseNynYvoGXLp8P+fttvcUKgWq++uTXnBi1yL4qiOPnAR6RxgmhnpHAEwAX+OQeT8Xamd9gLfMo/s0TcEUUItROoAB0rmPmYdrPA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [124.16.141.245]) by APP-05 (Coremail) with SMTP id zQCowAAHQwu1u_xnA7vnCA--.16499S2; Mon, 14 Apr 2025 15:39:34 +0800 (CST) From: Wentao Liang To: s.nawrocki@samsung.com, mchehab@kernel.org, krzk@kernel.org, alim.akhtar@samsung.com Cc: linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Wentao Liang Subject: [PATCH RESEND] media: platform: Add hardware sync wait to fimc_is_hw_change_mode() Date: Mon, 14 Apr 2025 15:39:14 +0800 Message-ID: <20250414073915.2317-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.42.0.windows.2 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: zQCowAAHQwu1u_xnA7vnCA--.16499S2 X-Coremail-Antispam: 1UD129KBjvPXoW8tF43KF17AFyUtr4rWr45p5X_Gr13JoW8JF yaka1xtr4UXwnIgrnru3yfAwsrurW3KrWF9FZ0gryqq3W3A3W5W393Xr4agF1YkFn5Xry5 Gw13AF4xJa4xn29KB7ZKAUJUUUU8529EdanIXcx71UUUUU7v73VFW2AGmfu7bjvjm3AaLa J3UjIYCTnIWjp_UUUY-7AC8VAFwI0_Gr0_Xr1l1xkIjI8I6I8E6xAIw20EY4v20xvaj40_ Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M2 8EF7xvwVC0I7IYx2IY67AKxVW8JVW5JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVWxJVW8 Jr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r1Y6r17McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v26r1q 6r43MxkIecxEwVAFwVW8CwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8Jw C20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAF wI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjx v20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2 jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0x ZFpf9x0JU6UDXUUUUU= X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiCQ8MA2f8nMBkGQABsy In fimc_is_hw_change_mode(), the function changes camera modes without waiting for hardware completion, risking corrupted data or system hangs if subsequent operations proceed before the hardware is ready. Add fimc_is_hw_wait_intmsr0_intmsd0() after mode configuration, ensuring hardware state synchronization and stable interrupt handling. Signed-off-by: Wentao Liang --- drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c b/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c index 366e6393817d..5f9c44e825a5 100644 --- a/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c +++ b/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c @@ -164,6 +164,7 @@ int fimc_is_hw_change_mode(struct fimc_is *is) if (WARN_ON(is->config_index >= ARRAY_SIZE(cmd))) return -EINVAL; + fimc_is_hw_wait_intmsr0_intmsd0(is); mcuctl_write(cmd[is->config_index], is, MCUCTL_REG_ISSR(0)); mcuctl_write(is->sensor_index, is, MCUCTL_REG_ISSR(1)); mcuctl_write(is->setfile.sub_index, is, MCUCTL_REG_ISSR(2));