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 E462718BBAE; Tue, 30 Sep 2025 15:24:40 +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=1759245881; cv=none; b=pcSPpdD40G/H1x58LX2ABspsc0LwTLUg756ihfNNGs9eo8ZimVXoewJ5a3E2oaowSvYn+7hroIXgRWifNR1NPTIgvtFVTsPNKIqyyeYzzr8k3kkj9OQJ2OwtDXZ8wRdE/k8WV68xagdYldL6Q4enTgJeNo8lHQWLUT5+ZRcxp5Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759245881; c=relaxed/simple; bh=/q2T8NxtMgljoqvxYcKGybTDgksMzNgWR/Ojj0DUoNQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=byEGKVRoBpEy/JxFIMXK4w+a78my5/fqJjr0bklPTgVz6e9xdddZdOXno+/5dqaMjSAb43uLNIZToB/DOgglniJUwKoYF8tDsri8o4ACVEj2iSdNy9Defyf4cLLOQHnSjeGFKb5x1zqzji4rSWdfNVZ2STG9O8TkaQV023y1PZw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nrB0cxGM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="nrB0cxGM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55CDFC4CEF0; Tue, 30 Sep 2025 15:24:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1759245880; bh=/q2T8NxtMgljoqvxYcKGybTDgksMzNgWR/Ojj0DUoNQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nrB0cxGMGfD8azyDIiayarogdF71XHyIISVG1HjbOa9FMthr1LfoEYCrw2JK5xpvT zfF0OBZC4aTVf+VpsYAKXDhDl32LA4NrcFWlrrCM+z++hFxED2d7xKDLZqTIRbnkH5 XbF5PJVPyDe+UA5pL7wXjn0spwHqKsW0FlaAok8c= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nirmoy Das , Thomas Zimmermann , KuoHsiang Chou , Dave Airlie , Jocelyn Falempe , dri-devel@lists.freedesktop.org, Sasha Levin , "Carol L Soto csoto@nvidia.com" Subject: [PATCH 6.6 77/91] drm/ast: Use msleep instead of mdelay for edid read Date: Tue, 30 Sep 2025 16:48:16 +0200 Message-ID: <20250930143824.381701781@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250930143821.118938523@linuxfoundation.org> References: <20250930143821.118938523@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ 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 Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/ast/ast_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/ast/ast_dp.c +++ b/drivers/gpu/drm/ast/ast_dp.c @@ -62,7 +62,7 @@ int ast_astdp_read_edid(struct drm_devic * 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) &&