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 3576D12C462; Tue, 30 Apr 2024 10:56:46 +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=1714474606; cv=none; b=fXNprhtLURjpmhCsshBAjtYNY/hHTKXVpD59joSWmWo1Elu71l2IfJjhSD+i2F3e79WS1MgiBYu1VlFubeZSZQgQ5Qw7fdX9c19p0zLbKJjn82qyjKDgRVvXrWR05n/zNLCWmkesUmbcIaUO8Prr/EHJ2hr5MZQNJSfrb9ALpDM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714474606; c=relaxed/simple; bh=vN9tAX3HbpJrraoL0BiGUzal8yEIKQYoIZYjlH2aB+U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sCIeef+MJ1oyBBygC7gQAK96QsfmODwR5NFgEmlIZDj1otQCknKTPTMFXQMBlQGbWUXGvhld77D37zznvTU7LAj+P/l5N2YbkybIWm/U4RxeUHrQNtOuWFNJZ19XV8WEm4qWzH83/D1XjIZnhWoQD+Vz3nBGsGQnrpUiCTvKh40= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GoWgFJ1k; 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="GoWgFJ1k" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A7CD6C4AF19; Tue, 30 Apr 2024 10:56:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1714474606; bh=vN9tAX3HbpJrraoL0BiGUzal8yEIKQYoIZYjlH2aB+U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GoWgFJ1kW6gei15DeZPluVpMGPGyGRNpVOq4KBnYtjb3qfEq0oOqTeDjuD4JIk26L todm5IVBaphrK0PgbiAOou4fyrcfI4CiCCgivrJ34XTyEgrVhKFzBCUZDdHN2Mv3H2 +KBMSD3bVtUux63IO0ZlYUv49c0IdR2n8mT8MF60= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Michal Tomek , Sebastian Reichel , Heiko Stuebner , Vinod Koul , Sasha Levin Subject: [PATCH 6.8 207/228] phy: rockchip-snps-pcie3: fix bifurcation on rk3588 Date: Tue, 30 Apr 2024 12:39:45 +0200 Message-ID: <20240430103109.778461374@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240430103103.806426847@linuxfoundation.org> References: <20240430103103.806426847@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Michal Tomek [ Upstream commit f8020dfb311d2b6cf657668792aaa5fa8863a7dd ] So far all RK3588 boards use fully aggregated PCIe. CM3588 is one of the few boards using this feature and apparently it is broken. The PHY offers the following mapping options: port 0 lane 0 - always mapped to controller 0 (4L) port 0 lane 1 - to controller 0 or 2 (1L0) port 1 lane 0 - to controller 0 or 1 (2L) port 1 lane 1 - to controller 0, 1 or 3 (1L1) The data-lanes DT property maps these as follows: 0 = no controller (unsupported by the HW) 1 = 4L 2 = 2L 3 = 1L0 4 = 1L1 That allows the following configurations with first column being the mainline data-lane mapping, second column being the downstream name, third column being PCIE3PHY_GRF_CMN_CON0 and PHP_GRF_PCIESEL register values and final column being the user visible lane setup: <1 1 1 1> = AGGREG = [4 0] = x4 (aggregation) <1 1 2 2> = NANBNB = [0 0] = x2 x2 (no bif.) <1 3 2 2> = NANBBI = [1 1] = x2 x1x1 (bif. of port 0) <1 1 2 4> = NABINB = [2 2] = x1x1 x2 (bif. of port 1) <1 3 2 4> = NABIBI = [3 3] = x1x1 x1x1 (bif. of both ports) The driver currently does not program PHP_GRF_PCIESEL correctly, which is fixed by this patch. As a side-effect the new logic is much simpler than the old logic. Fixes: 2e9bffc4f713 ("phy: rockchip: Support PCIe v3") Signed-off-by: Michal Tomek Signed-off-by: Sebastian Reichel Acked-by: Heiko Stuebner Link: https://lore.kernel.org/r/20240404-rk3588-pcie-bifurcation-fixes-v1-1-9907136eeafd@kernel.org Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- .../phy/rockchip/phy-rockchip-snps-pcie3.c | 24 +++++++------------ 1 file changed, 8 insertions(+), 16 deletions(-) diff --git a/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c b/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c index 121e5961ce114..d5bcc9c42b284 100644 --- a/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c +++ b/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c @@ -132,7 +132,7 @@ static const struct rockchip_p3phy_ops rk3568_ops = { static int rockchip_p3phy_rk3588_init(struct rockchip_p3phy_priv *priv) { u32 reg = 0; - u8 mode = 0; + u8 mode = RK3588_LANE_AGGREGATION; /* default */ int ret; /* Deassert PCIe PMA output clamp mode */ @@ -140,28 +140,20 @@ static int rockchip_p3phy_rk3588_init(struct rockchip_p3phy_priv *priv) /* Set bifurcation if needed */ for (int i = 0; i < priv->num_lanes; i++) { - if (!priv->lanes[i]) - mode |= (BIT(i) << 3); - if (priv->lanes[i] > 1) - mode |= (BIT(i) >> 1); - } - - if (!mode) - reg = RK3588_LANE_AGGREGATION; - else { - if (mode & (BIT(0) | BIT(1))) - reg |= RK3588_BIFURCATION_LANE_0_1; - - if (mode & (BIT(2) | BIT(3))) - reg |= RK3588_BIFURCATION_LANE_2_3; + mode &= ~RK3588_LANE_AGGREGATION; + if (priv->lanes[i] == 3) + mode |= RK3588_BIFURCATION_LANE_0_1; + if (priv->lanes[i] == 4) + mode |= RK3588_BIFURCATION_LANE_2_3; } + reg = mode; regmap_write(priv->phy_grf, RK3588_PCIE3PHY_GRF_CMN_CON0, (0x7<<16) | reg); /* Set pcie1ln_sel in PHP_GRF_PCIESEL_CON */ if (!IS_ERR(priv->pipe_grf)) { - reg = (mode & (BIT(6) | BIT(7))) >> 6; + reg = mode & 3; if (reg) regmap_write(priv->pipe_grf, PHP_GRF_PCIESEL_CON, (reg << 16) | reg); -- 2.43.0