From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C143F43F091; Mon, 31 Aug 2026 13:58:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788184723; cv=none; b=dwO5iA5EXF85wMqSWQ8Ppe+F4dxyN9krSkBniyhPI8dpNgb6LPT3+moNnkc3R0eAHcP1Z4cEN2cRqjQGcE3F73s+OQ1aQR2mCi5jdqlfKJPxqtlSjWEmzab1mlUI7Pq/mr6PcPv+C4xs0uyOwi3VkEsbNgoRW+8zJRFjIclHaBA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788184723; c=relaxed/simple; bh=QFZatLp85OM61i5l+Ga9ixJaQUR0viK7Z4DJwTsDxXQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HpteoqSk/bstzyLShBa65uh471Br6J58zi//wVGOWfnYZlzeLPPJNyFCf0r3P3OMQBoJTCSr+X4axcTAbvV55YmBtaMBaySfIB3f/sR2TnxZvOW+pBK0f/EB+MNVkxK9sPMtSh3ZPWrzUDXduvdwa3elPDPtG07jD+0/Me7HYt4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Px3Y6p24; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Px3Y6p24" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27AE61F00A3D; Mon, 31 Aug 2026 13:58:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788184722; bh=C+Xyd7Wn/CfF0oX0xEQaWbPwOeNSBd+UI3OiQYz1U+w=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Px3Y6p24h5rnCcUDabXAdNGyCbr3x8ffwGTJEsqU9tws1ZVWBLEpfSlDZN/7GYDmq oECwV9Wwz1ExoFs/9YcFAiL/bwn9cHEMfHGjcAv8tMnqbC9GlQVp5umXyuOs1iYSMX g1slSxOPjOOS41CzPgU0tmIAEKuzF5lE2+imMrn4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wentao Liang , Hans Verkuil , Sasha Levin Subject: [PATCH 6.1 16/92] media: platform: exynos4-is: Add hardware sync wait to fimc_is_hw_change_mode() Date: Mon, 31 Aug 2026 15:34:14 +0200 Message-ID: <20260831133400.381439986@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260831133359.482388899@linuxfoundation.org> References: <20260831133359.482388899@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wentao Liang [ Upstream commit bd9f6ce7d512fa21249415c16af801a4ed5d97b6 ] 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 Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- 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 366e6393817d2..5f9c44e825a5f 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)); -- 2.53.0