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 ED73235C690 for ; Thu, 30 Jul 2026 19:30:00 +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=1785439804; cv=none; b=DqF2bCivO/mZWzyEJNb1Ho6XIXM+hlfLMGhpO/7L+YIbQ+Q8M58ifiDeGcAYV0RyKkSfy47p3CQJmgAxuTYzjDZ+w0l+GIB5KA1M0jhGimqb2RhT1PB1V1JFXI25aUTGdB4ROnFuUkSr4tIkB1MTyut7xZqNBmiRu+rxOvpIVAU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785439804; c=relaxed/simple; bh=2hMOqgeAHBmXAt2NmErg3pJ3buqwzj+bmwC7PVpVXNw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ugxRQd29cslgUE1pmeJvlmiQYIbULrayprtpgfYE1DZ8SY+RKVEg9djomi8l82dWo7Yd9nK89a+EPKsB20tp8ZGF5v/60WqVonydPfHoWNdYlYFTW0aUDJiGH9n/8CFmLzWMX+/xbLsjDfsnoJyahoyVtu3/xWDwPjLvOI7jY5o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=A+KLLEjR; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="A+KLLEjR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AEBE31F00A3F; Thu, 30 Jul 2026 19:29:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785439799; bh=eyubPnzDzrxecEuisD3YX1dytdLa+ggwQlgufiB++Z4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=A+KLLEjRoIjKItgxiIzS6od8kosMndl2KMQEaBewrH2z5ryvCujwCa74B2K+8oT1b 74979nFUwAW4hh6EZzVBbpPz/wcZhGIERpo2n8j/1Y/umJnLN5mjQnCePwGxha461c 1WemyeHx3FB/j+lQhDK7IZJu05ylDGPkdoLpVVNQB33GYfdiIC5GNwMUUKwxCtxtgF geupwoJSBXhl3cYRtHUtStW02Z4se5Ri47KBUO6yOEpkyhq5yaQhUhb1PmLR5mZLgv PL3NNa3rmjGvaPRUg+7N3IfhUv/s36yn+4jd6H9lUjW4lmntmPAzxRZyYhniyf+/ns vea4VRuTEl6sg== From: Sasha Levin To: stable@vger.kernel.org Cc: Biju Das , Tommaso Merciai , Sasha Levin Subject: [PATCH 6.6.y 2/2] drm: renesas: rzg2l_mipi_dsi: Increase reset deassertion delay Date: Thu, 30 Jul 2026 15:29:55 -0400 Message-ID: <20260730192955.3124753-2-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260730192955.3124753-1-sashal@kernel.org> References: <2026072951-ended-spoiler-e626@gregkh> <20260730192955.3124753-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Biju Das [ Upstream commit 7cbba8a8ba0219a267844d3116dbc77cecb4fcf8 ] The RZ/G2L hardware manual (Rev. 1.50, May 2025), Section 34.4.2.1, requires waiting at least 1 msec after deasserting the CMN_RSTB signal before the DSI-Tx module is ready. Increase the delay from 1 usec to 1 msec by replacing udelay(1) with fsleep(1000) for RZ/G2L SoCs. Fixes: 7a043f978ed1 ("drm: rcar-du: Add RZ/G2L DSI driver") Cc: stable@vger.kernel.org Reviewed-by: Tommaso Merciai Tested-by: Tommaso Merciai Link: https://patch.msgid.link/20260330104450.128512-3-biju.das.jz@bp.renesas.com Signed-off-by: Biju Das Signed-off-by: Sasha Levin --- drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c index 6cec796dd463..a9216a99b2be 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -238,7 +238,7 @@ static int rzg2l_mipi_dsi_dphy_init(struct rzg2l_mipi_dsi *dsi, if (ret < 0) return ret; - udelay(1); + fsleep(1000); return 0; } -- 2.53.0