From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A8D9530B520 for ; Mon, 29 Sep 2025 15:54:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759161257; cv=none; b=KTQ3Qhcok2fmVS4B2n2w+7gv1bBfabt0knVhI5h0Ht/fyuHbZk9AnQAe9NrzDNdLwlrnDI82Li6I/WMWEIpnAcJvpiWMfEClmTMJ4tveu8iISR9Jyw7FVZoTARsZr5Cf3DhwB04p10DzwDc0KI23m15d+rHvbl1wlo4YrBN6VCU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759161257; c=relaxed/simple; bh=1sgpF2bI8rK8MTu4hZLFvvYX/glp3S5AUL3GAJHaBm0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sjECduxKFEbFAqtBlaaiT0NNVq/lsI5ETgUYSlSwzzSudrGcGKVUqqruadHPTVuJrZFE97vAujWPmPfu0Mx9lhRwUCccSi0lxOEcqXJGYSAEVSdmUy7a9kaRgHpLU58bUX+k4qctVvzjtEcGyJA4iKFFRuMB6QxdhXm7eLy2HJY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ai5JSo7z; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ai5JSo7z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 59E3FC4CEF4; Mon, 29 Sep 2025 15:54:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1759161256; bh=1sgpF2bI8rK8MTu4hZLFvvYX/glp3S5AUL3GAJHaBm0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ai5JSo7zUk3to/LzSUvUGHBklP7YShOsCjmo/QW+YodDNDC2ysAQtarB5xoO4TN0u GyKFSCRZsJjNnH/LXWNGx/QlL0nTzxNyz8DMeCnwiddeF6ToRh7JjLGg+j8ZJJh1Lu I3ajADpO5kp2UXM1NgPlwH4sh7xnAyWZjeu61ibBFNlFA0GuOgj/qRwD9B7jR/8hRL xrBd5qd4ROh5mIFCgrVwhs00YQjGvV/Wbe8bmc29n0V/Z+AQslOJViYVenpzlskGvc XnrjsE5YouCabI6wO229S+rJrUZmLJtSxF8I0JXgTWCYg1JQYoKhdF2a57/zfxHJnN 5ROSEnnlQ4WpA== From: Sasha Levin To: stable@vger.kernel.org Cc: Nirmoy Das , Thomas Zimmermann , KuoHsiang Chou , Dave Airlie , Jocelyn Falempe , dri-devel@lists.freedesktop.org, Sasha Levin Subject: [PATCH 6.1.y] drm/ast: Use msleep instead of mdelay for edid read Date: Mon, 29 Sep 2025 11:54:09 -0400 Message-ID: <20250929155412.141429-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <2025092921-consensus-mystified-6396@gregkh> References: <2025092921-consensus-mystified-6396@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Nirmoy Das [ Upstream commit c7c31f8dc54aa3c9b2c994b5f1ff7e740a654e97 ] The busy-waiting in `mdelay()` can cause CPU stalls and kernel timeouts during boot. Signed-off-by: Nirmoy Das Reviewed-by: Thomas Zimmermann Tested-by: Carol L Soto csoto@nvidia.com Fixes: 594e9c04b586 ("drm/ast: Create the driver for ASPEED proprietory Display-Port") Cc: KuoHsiang Chou Cc: Thomas Zimmermann Cc: Dave Airlie Cc: Jocelyn Falempe Cc: dri-devel@lists.freedesktop.org Cc: # v5.19+ Signed-off-by: Thomas Zimmermann Link: https://lore.kernel.org/r/20250917194346.2905522-1-nirmoyd@nvidia.com [ Applied change to ast_astdp_read_edid() instead of ast_astdp_read_edid_block() ] Signed-off-by: Sasha Levin --- drivers/gpu/drm/ast/ast_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/ast/ast_dp.c b/drivers/gpu/drm/ast/ast_dp.c index a4a23b9623ad3..7d2fb34c72b75 100644 --- a/drivers/gpu/drm/ast/ast_dp.c +++ b/drivers/gpu/drm/ast/ast_dp.c @@ -51,7 +51,7 @@ int ast_astdp_read_edid(struct drm_device *dev, u8 *ediddata) * of right-click of mouse. * 2. The Delays are often longer a lot when system resume from S3/S4. */ - mdelay(j+1); + msleep(j + 1); if (!(ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xD1, ASTDP_MCU_FW_EXECUTING) && -- 2.51.0