From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail5.25mail.st (mail5.25mail.st [74.50.62.9]) (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 90C4512AACB for ; Thu, 15 Feb 2024 12:41:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.50.62.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708000885; cv=none; b=Vk+41KUww/Yjpwu52RgMN4uLwg8OsjjtagDaSp7d4ihjwJIxh+diFyax7JNq1Iw60Az5a2r6R9cPdAgJJO8t4CemcZdND4xmpvOnq60KsV0rzLBgPdBYxfrGdoLc47prZVYpTlFlTH0n6DN4xzkcHHvjETirLClwk/lddiS+5Pc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708000885; c=relaxed/simple; bh=VERCIMMDwj5lwKKcADSnyxcjQigwJ3k/cdfbfunsFPQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=plGp1Xss47qTWvawJMLyn3vwLKtvT6AA4uRGhiX0N44xdJn0Pwlmd2uKzywXA9Ivvq4LztRlIkybEIY8JRVQTcZ8bL/Da2ljaGf3a2+ojdwpYRZS4Pd/7qE7HHXteb/reSDZVfajP1bJ3Cbi51eO+v+El1r3reNetfDO4AxVZO0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=atomide.com; spf=fail smtp.mailfrom=atomide.com; dkim=pass (2048-bit key) header.d=atomide.com header.i=@atomide.com header.b=DgPcLvTj; arc=none smtp.client-ip=74.50.62.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=atomide.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=atomide.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=atomide.com header.i=@atomide.com header.b="DgPcLvTj" Received: from localhost (91-158-86-216.elisa-laajakaista.fi [91.158.86.216]) by mail5.25mail.st (Postfix) with ESMTPSA id 7D68660333; Thu, 15 Feb 2024 12:40:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=atomide.com; s=25mailst; t=1708000883; bh=VERCIMMDwj5lwKKcADSnyxcjQigwJ3k/cdfbfunsFPQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DgPcLvTjJGxq+IXNCQCYs1LxVECVbuw4ttf0+ed72NdtX7wL4fBM7rZ7jmbqTv/gP dVW+vPUJ4Ld2L3NyEZ2Hivro3JoHmdQrYuFQrx0ziR8Qmxfiygun2UMoMiorY42w1i 5xBwWsRBCVwzTFKMf/UbGCa79vwwh18+c3Tj2JglTeLMUdnYrv+qiMAQAAW9EPFt8p d8ks5hpHfSLtrmYAum+tL7yZ4vnsWesKW1R09vnzmGkiLXQutvVY/T8XpzuqLbyhbO wwim89SzZSlKU5QQoDwJDKYLPoWA8cBnXw3T7/GdTBvfyAz29KqvjPuLtsVd2hRbi9 sYMalts6I4vcQ== From: Tony Lindgren To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Simha BN , Sam Ravnborg Cc: Dmitry Baryshkov , Krzysztof Kozlowski , Michael Walle , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org Subject: [PATCH v4 10/10] drm/bridge: tc358775: Configure hs_rate and lp_rate Date: Thu, 15 Feb 2024 14:31:53 +0200 Message-ID: <20240215123222.42609-11-tony@atomide.com> X-Mailer: git-send-email 2.43.1 In-Reply-To: <20240215123222.42609-1-tony@atomide.com> References: <20240215123222.42609-1-tony@atomide.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The hs_rate and lp_rate may be used by the dsi host for timing calculations. The tc358775 has a maximum bit rate of 1 Gbps/lane, tc358765 has maximurate of 800 Mbps per lane. Reviewed-by: Michael Walle Signed-off-by: Tony Lindgren --- drivers/gpu/drm/bridge/tc358775.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c --- a/drivers/gpu/drm/bridge/tc358775.c +++ b/drivers/gpu/drm/bridge/tc358775.c @@ -637,6 +637,19 @@ static int tc_attach_host(struct tc_data *tc) dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM; + /* + * The hs_rate and lp_rate are data rate values. The HS mode is + * differential, while the LP mode is single ended. As the HS mode + * uses DDR, the DSI clock frequency is half the hs_rate. The 10 Mbs + * data rate for LP mode is not specified in the bridge data sheet, + * but seems to be part of the MIPI DSI spec. + */ + if (tc->type == TC358765) + dsi->hs_rate = 800000000; + else + dsi->hs_rate = 1000000000; + dsi->lp_rate = 10000000; + ret = devm_mipi_dsi_attach(dev, dsi); if (ret < 0) { dev_err(dev, "failed to attach dsi to host\n"); -- 2.43.1