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 CE13234D921; Wed, 3 Dec 2025 16:02:50 +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=1764777770; cv=none; b=CCZrDizQnemN2psEF2qqHqm/SmmUq3B+YnwAOwFYwqI2KfedrKEspMSgzghRqu1MFT8hdNQwpVHHKoGSZ82DfjZgB0u04fgUspVCXhaO3KWcq3W4yim83JY/5W2fWW8D66QECVhtPLRlqClW14g1g2nPWyNSsfo7QPoS2J5+4Aw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777770; c=relaxed/simple; bh=1AJtyCdb4Yf8fV22PilM2EFGie2MAlxJkvj/1/intgo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cM/x0h/tJHhLKSUDWa2vs8bN/zb1lvYpQ8MSzr61JGMrAqMYilRS14gri8XertWQtpDc6WcahSAIFhiwepjEAgFnYZXHaDoPRFFqdAANzCUMybAZFQIhPCZGUZkagsUO52C+t5uAUZIpaLzeumjgk04mRN9laU2L+peGgUNguUQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zdgDQzI6; 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="zdgDQzI6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3EE11C16AAE; Wed, 3 Dec 2025 16:02:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764777770; bh=1AJtyCdb4Yf8fV22PilM2EFGie2MAlxJkvj/1/intgo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zdgDQzI60BQSQeW2sdhdnKRfHGNPS88zdEA/oCbSvUoaKmbumouoItnUZB0ty0GKG saodF0KcVDGE13JPlbLyVYjzrSjpgnap+mznlpqIEhacpOk1ZYrt+xkd3UVZvnLJim hOynlqQxR11Jaal9z2TsojsTEeRp5PILiKg0+J3w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Udit Kumar , Devarsh Thakkar , Harikrishna Shenoy , Vinod Koul , Sasha Levin Subject: [PATCH 5.15 142/392] phy: cadence: cdns-dphy: Enable lower resolutions in dphy Date: Wed, 3 Dec 2025 16:24:52 +0100 Message-ID: <20251203152419.311907233@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251203152414.082328008@linuxfoundation.org> References: <20251203152414.082328008@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Harikrishna Shenoy [ Upstream commit 43bd2c44515f8ee5c019ce6e6583f5640387a41b ] Enable support for data lane rates between 80-160 Mbps cdns dphy as mentioned in TRM [0] by setting the pll_opdiv field to 16. This change enables lower resolutions like 640x480 at 60Hz. [0]: https://www.ti.com/lit/zip/spruil1 (Table 12-552. DPHY_TX_PLL_CTRL Register Field Descriptions) Reviewed-by: Udit Kumar Reviewed-by: Devarsh Thakkar Signed-off-by: Harikrishna Shenoy Link: https://lore.kernel.org/r/20250807052002.717807-1-h-shenoy@ti.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/phy/cadence/cdns-dphy.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/phy/cadence/cdns-dphy.c b/drivers/phy/cadence/cdns-dphy.c index ba042e39cfaf4..9a54c2750d87c 100644 --- a/drivers/phy/cadence/cdns-dphy.c +++ b/drivers/phy/cadence/cdns-dphy.c @@ -115,7 +115,7 @@ static int cdns_dsi_get_dphy_pll_cfg(struct cdns_dphy *dphy, dlane_bps = opts->hs_clk_rate; - if (dlane_bps > 2500000000UL || dlane_bps < 160000000UL) + if (dlane_bps > 2500000000UL || dlane_bps < 80000000UL) return -EINVAL; else if (dlane_bps >= 1250000000) cfg->pll_opdiv = 1; @@ -125,6 +125,8 @@ static int cdns_dsi_get_dphy_pll_cfg(struct cdns_dphy *dphy, cfg->pll_opdiv = 4; else if (dlane_bps >= 160000000) cfg->pll_opdiv = 8; + else if (dlane_bps >= 80000000) + cfg->pll_opdiv = 16; cfg->pll_fbdiv = DIV_ROUND_UP_ULL(dlane_bps * 2 * cfg->pll_opdiv * cfg->pll_ipdiv, -- 2.51.0