From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794064264; b=4huoOSHeD4t6IcRZYMPrGGnVyVLZ7M8nZvagOBi/9bPqk4ug+eLNi3qxF1tsv38uIeO6 RsJZFPtn+oVvbRmqu7LYKHGwMs5nm/husjxcBZAi5XpDVDw+pzzMxilqO4Y1W/meo1bmj 6cLByuS84BQhGY2/vwQhg24ZsTfTMVk5x57DSqXfXqJfEAHE7+m6Bzl+bOWgkgoetvCun GD9EtpEfGCDHixWNA7HWfrvooPIQF6ShTClWTXgZiG8/7hbvvdavLaIw45cxGUiM9/FxD ggZBvUZfu3do8Zn9vcWH1UOnrrtKw67zfqQvpTWAt21rfunltbWV3Y7XlyfXfwVO0VQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794064264; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=n3sRxlq5T/rk5FTMrKQzPYmkt0ceS++llylVPFxkwUI=; b=0rlhYg0801bNwVv77DzzjwsYpHMOGh2Vy1sSFrYmHMljUPwAkcR8gOqVqoGc9vsKsbq6 IaQIUR88vcFnJmaNSxC/2hBSWkuJVa/UJyKnn8qPpAS0zCmLDBnBuLbHMZN6oDYDaFkzy Zy+XaR0HEi62vZv5n/J3QhZyAp7H7ymdnElafGorSY6UZVpmCQYNfcR9oKq4Fi/HJFYpc uZBv6MGNBL4cL7OLneiYr/3lhbZFOFgZnk62FhsURaUEEFWUTr/K4rfJ4swHOGkf1uucv LoTOxCAsJgQQyGOfT2v/E8S5a2FqhomuouI7fY29hc9OIwbKXb/b6ynMeMO7zRWnPCw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=YSKU17pQ; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A887606A9C9; Sat, 7 Nov 2026 15:11:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=YSKU17pQ Received: by smtp.kernel.org (Postfix) with ESMTPSA id EEF7E1F0089F; Sat, 7 Nov 2026 15:11:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794064264; bh=n3sRxlq5T/rk5FTMrKQzPYmkt0ceS++llylVPFxkwUI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YSKU17pQTKLr+QV5JYXUWvcGMYOXOYc2VVgv5OimvSel2yr5dx1WrguICEfkHqP8o Qbv/mbmR99E7g2fepYZaXOXbpZxTQS0v9kkuJ2xYtvvlQWdQseGyXYmxNZUB+wcta8 NI2bgQxi3TyV/aCGKrrCI/rYD5gVmFa9pVX7cAWU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Birk Skyum , Renjiang Han , Vikash Garodia , Vishnu Reddy , Bryan ODonoghue , Sasha Levin Subject: [PATCH 7.3 0363/1257] media: iris: reset AHB bridge before enabling HW mode Date: Sat, 7 Nov 2026 08:44:19 -0500 Message-ID: <20261107134949.566230189@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134939.434104957@linuxfoundation.org> References: <20261107134939.434104957@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vikash Garodia [ Upstream commit cc330f5589965bcf99307ee9c66deb8a0a53e0ee ] When video power domain is switched from software-controlled mode to hardware-controlled mode, the core may be powered down without the AHB bridge going through the required reset sequence. This may leave the bridge FIFO in a stale state. Reset the CPU-to-VPU AHB bridge before switching the power domain to hardware-controlled mode. This ensures that the bridge FIFO are in reset state before going for mode switch. Reported-by: Birk Skyum Link: https://lore.kernel.org/all/20260913194707.91885-1-birk.skyum@pm.me Fixes: 95a337f92f0a ("media: iris: switch to hardware mode after firmware boot") Cc: stable@vger.kernel.org Co-developed-by: Renjiang Han Signed-off-by: Renjiang Han Signed-off-by: Vikash Garodia Reviewed-by: Vishnu Reddy Tested-by: Birk Skyum # Lenovo Yoga Slim 7x Signed-off-by: Bryan O'Donoghue Signed-off-by: Sasha Levin --- drivers/media/platform/qcom/iris/iris_vpu_common.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/platform/qcom/iris/iris_vpu_common.c b/drivers/media/platform/qcom/iris/iris_vpu_common.c index e4847c1077097..2ef8004e976e3 100644 --- a/drivers/media/platform/qcom/iris/iris_vpu_common.c +++ b/drivers/media/platform/qcom/iris/iris_vpu_common.c @@ -311,6 +311,11 @@ int iris_vpu_power_on_hw(struct iris_core *core) int iris_vpu_set_hwmode(struct iris_core *core) { + writel(CORE_BRIDGE_SW_RESET | CORE_BRIDGE_HW_RESET_DISABLE, + core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET); + writel(CORE_BRIDGE_HW_RESET_DISABLE, core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET); + writel(0x0, core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET); + return dev_pm_genpd_set_hwmode(core->pmdomain_tbl->pd_devs[IRIS_HW_POWER_DOMAIN], true); } -- 2.53.0