From patchwork Fri Jun 16 06:20:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 693560 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BFCBEB64D7 for ; Fri, 16 Jun 2023 06:22:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241252AbjFPGWx (ORCPT ); Fri, 16 Jun 2023 02:22:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55026 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230015AbjFPGWc (ORCPT ); Fri, 16 Jun 2023 02:22:32 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA6D230E6 for ; Thu, 15 Jun 2023 23:22:21 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qA2qA-0006tr-Gx; Fri, 16 Jun 2023 08:21:46 +0200 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1qA2q9-007kyx-OF; Fri, 16 Jun 2023 08:21:45 +0200 Received: from sha by dude02.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1qA2q5-003FVH-CR; Fri, 16 Jun 2023 08:21:41 +0200 From: Sascha Hauer To: linux-rockchip@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Heiko Stuebner , Kyungmin Park , MyungJoo Ham , Will Deacon , Mark Rutland , kernel@pengutronix.de, Michael Riesch , Robin Murphy , Vincent Legoll , Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, Sebastian Reichel , Sascha Hauer , Jonathan Cameron Subject: [PATCH v6 18/26] PM / devfreq: rockchip-dfi: account for multiple DDRMON_CTRL registers Date: Fri, 16 Jun 2023 08:20:53 +0200 Message-Id: <20230616062101.601837-19-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230616062101.601837-1-s.hauer@pengutronix.de> References: <20230616062101.601837-1-s.hauer@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-pm@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The currently supported RK3399 has a set of registers per channel, but it has only a single DDRMON_CTRL register. With upcoming RK3588 this will be different, the RK3588 has a DDRMON_CTRL register per channel. Instead of expecting a single DDRMON_CTRL register, loop over the channels and write the channel specific DDRMON_CTRL register. Break out early out of the loop when there is only a single DDRMON_CTRL register like on the RK3399. Reviewed-by: Jonathan Cameron Reviewed-by: Sebastian Reichel Link: https://lore.kernel.org/r/20230524083153.2046084-19-s.hauer@pengutronix.de Signed-off-by: Sascha Hauer --- drivers/devfreq/event/rockchip-dfi.c | 72 ++++++++++++++++++---------- 1 file changed, 48 insertions(+), 24 deletions(-) diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c index 85ec93fd41858..2362d3953ba40 100644 --- a/drivers/devfreq/event/rockchip-dfi.c +++ b/drivers/devfreq/event/rockchip-dfi.c @@ -113,12 +113,13 @@ struct rockchip_dfi { int burst_len; int buswidth[DMC_MAX_CHANNELS]; int ddrmon_stride; + bool ddrmon_ctrl_single; }; static int rockchip_dfi_enable(struct rockchip_dfi *dfi) { void __iomem *dfi_regs = dfi->regs; - int ret = 0; + int i, ret = 0; mutex_lock(&dfi->mutex); @@ -132,29 +133,41 @@ static int rockchip_dfi_enable(struct rockchip_dfi *dfi) goto out; } - /* clear DDRMON_CTRL setting */ - writel_relaxed(HIWORD_UPDATE(0, DDRMON_CTRL_TIMER_CNT_EN | DDRMON_CTRL_SOFTWARE_EN | - DDRMON_CTRL_HARDWARE_EN), dfi_regs + DDRMON_CTRL); + for (i = 0; i < DMC_MAX_CHANNELS; i++) { + u32 ctrl = 0; - /* set ddr type to dfi */ - switch (dfi->ddr_type) { - case ROCKCHIP_DDRTYPE_LPDDR2: - case ROCKCHIP_DDRTYPE_LPDDR3: - writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_LPDDR23, DDRMON_CTRL_DDR_TYPE_MASK), - dfi_regs + DDRMON_CTRL); - break; - case ROCKCHIP_DDRTYPE_LPDDR4: - case ROCKCHIP_DDRTYPE_LPDDR4X: - writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_LPDDR4, DDRMON_CTRL_DDR_TYPE_MASK), - dfi_regs + DDRMON_CTRL); - break; - default: - break; - } + if (!(dfi->channel_mask & BIT(i))) + continue; - /* enable count, use software mode */ - writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_SOFTWARE_EN, DDRMON_CTRL_SOFTWARE_EN), - dfi_regs + DDRMON_CTRL); + /* clear DDRMON_CTRL setting */ + writel_relaxed(HIWORD_UPDATE(0, DDRMON_CTRL_TIMER_CNT_EN | + DDRMON_CTRL_SOFTWARE_EN | DDRMON_CTRL_HARDWARE_EN), + dfi_regs + i * dfi->ddrmon_stride + DDRMON_CTRL); + + /* set ddr type to dfi */ + switch (dfi->ddr_type) { + case ROCKCHIP_DDRTYPE_LPDDR2: + case ROCKCHIP_DDRTYPE_LPDDR3: + ctrl = DDRMON_CTRL_LPDDR23; + break; + case ROCKCHIP_DDRTYPE_LPDDR4: + case ROCKCHIP_DDRTYPE_LPDDR4X: + ctrl = DDRMON_CTRL_LPDDR4; + break; + default: + break; + } + + writel_relaxed(HIWORD_UPDATE(ctrl, DDRMON_CTRL_DDR_TYPE_MASK), + dfi_regs + i * dfi->ddrmon_stride + DDRMON_CTRL); + + /* enable count, use software mode */ + writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_SOFTWARE_EN, DDRMON_CTRL_SOFTWARE_EN), + dfi_regs + i * dfi->ddrmon_stride + DDRMON_CTRL); + + if (dfi->ddrmon_ctrl_single) + break; + } out: mutex_unlock(&dfi->mutex); @@ -164,6 +177,7 @@ static int rockchip_dfi_enable(struct rockchip_dfi *dfi) static void rockchip_dfi_disable(struct rockchip_dfi *dfi) { void __iomem *dfi_regs = dfi->regs; + int i; mutex_lock(&dfi->mutex); @@ -174,8 +188,17 @@ static void rockchip_dfi_disable(struct rockchip_dfi *dfi) if (dfi->usecount > 0) goto out; - writel_relaxed(HIWORD_UPDATE(0, DDRMON_CTRL_SOFTWARE_EN), - dfi_regs + DDRMON_CTRL); + for (i = 0; i < DMC_MAX_CHANNELS; i++) { + if (!(dfi->channel_mask & BIT(i))) + continue; + + writel_relaxed(HIWORD_UPDATE(0, DDRMON_CTRL_SOFTWARE_EN), + dfi_regs + i * dfi->ddrmon_stride + DDRMON_CTRL); + + if (dfi->ddrmon_ctrl_single) + break; + } + clk_disable_unprepare(dfi->clk); out: mutex_unlock(&dfi->mutex); @@ -666,6 +689,7 @@ static int rk3399_dfi_init(struct rockchip_dfi *dfi) dfi->buswidth[1] = FIELD_GET(RK3399_PMUGRF_OS_REG2_BW_CH1, val) == 0 ? 4 : 2; dfi->ddrmon_stride = 0x14; + dfi->ddrmon_ctrl_single = true; return 0; };