From patchwork Wed Jun 19 18:21:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704400 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 E373D157480 for ; Wed, 19 Jun 2024 18:22:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821345; cv=none; b=O3k032GvYjILvX81Hfgrwdn92ivdZU1nthTPcGPjHu4ggSuZbLp5/GwiTOchVptLA8BC2Ka0QZCoQMZaaDJPyIPkZzA0zxpI4R3lP2cMR2RWwA9rCeGV3zEV/qczB9xgqp9pbc2GhBH/rhbvfsrY75zdQAZmyhqXox3nsh2l42A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821345; c=relaxed/simple; bh=pDir7yRMwBQGwmxdsT+Noyy1fWa0xHbXSxH7Ojt9uM8=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=ri1PKXM4BcRjAHyrSOvbYN1wAjVQkJrTdV2P9lJBfcb+NfUS2Dtq83acazhsGCDGfxTbfkhU1ccw0KDv0XtxQyizqqyeE/yUtO8PCKFgm7Kl9ZGa+0u9zglCeVyTbo3BX37w2nHT9w3prjY2z4Jo6wJMrHCB/1WyWFECnUAO00I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sJzwX-00049Y-K2; Wed, 19 Jun 2024 20:22:01 +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 1sJzwW-003WTo-83; Wed, 19 Jun 2024 20:22:00 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 01/14] drm/bridge: analogix_dp: remove unused platform power_on_end callback Date: Wed, 19 Jun 2024 20:21:47 +0200 Message-Id: <20240619182200.3752465-1-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org This isn't used, but gives the impression of the power on and power off platform calls being non-symmetrical. Remove the unused callback and rename the power_on_start to simply power_on. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 7 ++----- drivers/gpu/drm/exynos/exynos_dp.c | 2 +- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 4 ++-- include/drm/bridge/analogix_dp.h | 3 +-- 4 files changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index b5dbff21c187..31fa67d966c7 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1257,8 +1257,8 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) goto out_dp_clk_pre; } - if (dp->plat_data->power_on_start) - dp->plat_data->power_on_start(dp->plat_data); + if (dp->plat_data->power_on) + dp->plat_data->power_on(dp->plat_data); phy_power_on(dp->phy); @@ -1283,9 +1283,6 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) goto out_dp_init; } - if (dp->plat_data->power_on_end) - dp->plat_data->power_on_end(dp->plat_data); - enable_irq(dp->irq); return 0; diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c index 3e6d4c6aa877..8ad2ec5c6455 100644 --- a/drivers/gpu/drm/exynos/exynos_dp.c +++ b/drivers/gpu/drm/exynos/exynos_dp.c @@ -233,7 +233,7 @@ static int exynos_dp_probe(struct platform_device *pdev) /* The remote port can be either a panel or a bridge */ dp->plat_data.panel = panel; dp->plat_data.dev_type = EXYNOS_DP; - dp->plat_data.power_on_start = exynos_dp_poweron; + dp->plat_data.power_on = exynos_dp_poweron; dp->plat_data.power_off = exynos_dp_poweroff; dp->plat_data.attach = exynos_dp_bridge_attach; dp->plat_data.get_modes = exynos_dp_get_modes; diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index 7069a3d4d581..baeb41875a4b 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -92,7 +92,7 @@ static int rockchip_dp_pre_init(struct rockchip_dp_device *dp) return 0; } -static int rockchip_dp_poweron_start(struct analogix_dp_plat_data *plat_data) +static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data) { struct rockchip_dp_device *dp = pdata_encoder_to_dp(plat_data); int ret; @@ -397,7 +397,7 @@ static int rockchip_dp_probe(struct platform_device *pdev) dp->data = dp_data; dp->plat_data.panel = panel; dp->plat_data.dev_type = dp->data->chip_type; - dp->plat_data.power_on_start = rockchip_dp_poweron_start; + dp->plat_data.power_on = rockchip_dp_poweron; dp->plat_data.power_off = rockchip_dp_powerdown; dp->plat_data.get_modes = rockchip_dp_get_modes; diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h index b0dcc07334a1..8709b6a74c0f 100644 --- a/include/drm/bridge/analogix_dp.h +++ b/include/drm/bridge/analogix_dp.h @@ -29,8 +29,7 @@ struct analogix_dp_plat_data { struct drm_connector *connector; bool skip_connector; - int (*power_on_start)(struct analogix_dp_plat_data *); - int (*power_on_end)(struct analogix_dp_plat_data *); + int (*power_on)(struct analogix_dp_plat_data *); int (*power_off)(struct analogix_dp_plat_data *); int (*attach)(struct analogix_dp_plat_data *, struct drm_bridge *, struct drm_connector *); From patchwork Wed Jun 19 18:21:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704403 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 AF70915252C for ; Wed, 19 Jun 2024 18:22:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821347; cv=none; b=NLmKhh+5daYLdlK+aQUNIme7ublmdmLgx/osUufD93g/UPxjqWUPdYGLyPfmOR6Ai4UNU21LaGz0YXoXYekmLhFwQzwsCnj5hzoVeeUw6NZ29z+n7OHFocMtIxOqHCoVtcnCu7gZOcxrgQ5DmewESTxqBzG91lg1UB1vJ0AjLO8= ARC-Message-Signature: i=1; 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Wed, 19 Jun 2024 20:22:00 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 02/14] drm/rockchip: analogix_dp: add runtime PM handling Date: Wed, 19 Jun 2024 20:21:48 +0200 Message-Id: <20240619182200.3752465-2-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org Hook up the runtime PM suspend/resume paths to make the rockchip glue behave more like the exynos one. The same suspend/resume functions are used for system sleep via the runtime PM force suspend/resume. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Reviewed-by: Heiko Stuebner Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index baeb41875a4b..8214265f1497 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -430,7 +431,6 @@ static void rockchip_dp_remove(struct platform_device *pdev) analogix_dp_remove(dp->adp); } -#ifdef CONFIG_PM_SLEEP static int rockchip_dp_suspend(struct device *dev) { struct rockchip_dp_device *dp = dev_get_drvdata(dev); @@ -450,14 +450,9 @@ static int rockchip_dp_resume(struct device *dev) return analogix_dp_resume(dp->adp); } -#endif -static const struct dev_pm_ops rockchip_dp_pm_ops = { -#ifdef CONFIG_PM_SLEEP - .suspend_late = rockchip_dp_suspend, - .resume_early = rockchip_dp_resume, -#endif -}; +static DEFINE_RUNTIME_DEV_PM_OPS(rockchip_dp_pm_ops, rockchip_dp_suspend, + rockchip_dp_resume, NULL); static const struct rockchip_dp_chip_data rk3399_edp = { .lcdsel_grf_reg = RK3399_GRF_SOC_CON20, @@ -485,7 +480,7 @@ struct platform_driver rockchip_dp_driver = { .remove_new = rockchip_dp_remove, .driver = { .name = "rockchip-dp", - .pm = &rockchip_dp_pm_ops, + .pm = pm_ptr(&rockchip_dp_pm_ops), .of_match_table = rockchip_dp_dt_ids, }, }; From patchwork Wed Jun 19 18:21:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704398 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 78C1415252C for ; Wed, 19 Jun 2024 18:22:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821343; cv=none; b=ZqZHdgDF20N1MAqBU8ZjiOy3ojHk9oSp6qvtKC4j1RshJ3VMvDfg8JPb3HTwUCeKBpC5hwHOHrJNonKui3nco3vILk32FooUiwPn+0NzQZZhjMaM6MwwFr17oJGxYfuGLoRFCdkyfGO2hllHbgAbJAPMyzU2JCsjFCD1FgHDPB0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821343; c=relaxed/simple; bh=kpwxqN9UwpLXJaeKJh6xVnXQKtBaSQK1YGkoWwUSoUY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=UGR3ysQVwepzCiqopNa5w/bWcfJbbVEQXnOlRrbG/NILek9PBqlYnKlMZvYSuC1QprwHYlPyxuWu2hnxjylfytacAviSZlyMaH4ra8tSiUEgFO13G4azAJNsAF1gNa+/ConlQo0XO90oCJSgGARJsxO4FZhyEvCVHxbRUisK188= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sJzwX-00049a-K3; Wed, 19 Jun 2024 20:22:01 +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 1sJzwW-003WTo-DJ; Wed, 19 Jun 2024 20:22:00 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 03/14] drm/bridge: analogix_dp: register AUX bus after enabling runtime PM Date: Wed, 19 Jun 2024 20:21:49 +0200 Message-Id: <20240619182200.3752465-3-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org AUX transactions require the controller to be in working state and take a runtime PM reference. To avoid potential races beween the first transactions on the bus and runtime PM being set up, move the AUX registration behind the runtime PM setup. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- .../drm/bridge/analogix/analogix_dp_core.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 31fa67d966c7..ae79802b62bb 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1721,31 +1721,34 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev) dp->drm_dev = drm_dev; dp->encoder = dp->plat_data->encoder; + pm_runtime_use_autosuspend(dp->dev); + pm_runtime_set_autosuspend_delay(dp->dev, 100); + pm_runtime_enable(dp->dev); + dp->aux.name = "DP-AUX"; dp->aux.transfer = analogix_dpaux_transfer; dp->aux.dev = dp->dev; dp->aux.drm_dev = drm_dev; ret = drm_dp_aux_register(&dp->aux); - if (ret) - return ret; - - pm_runtime_use_autosuspend(dp->dev); - pm_runtime_set_autosuspend_delay(dp->dev, 100); - pm_runtime_enable(dp->dev); + if (ret) { + DRM_ERROR("failed to register AUX (%d)\n", ret); + goto err_disable_pm_runtime; + } ret = analogix_dp_create_bridge(drm_dev, dp); if (ret) { DRM_ERROR("failed to create bridge (%d)\n", ret); - goto err_disable_pm_runtime; + goto err_unregister_aux; } return 0; +err_unregister_aux: + drm_dp_aux_unregister(&dp->aux); err_disable_pm_runtime: pm_runtime_dont_use_autosuspend(dp->dev); pm_runtime_disable(dp->dev); - drm_dp_aux_unregister(&dp->aux); return ret; } From patchwork Wed Jun 19 18:21:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704399 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 398CF155346 for ; Wed, 19 Jun 2024 18:22:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821345; cv=none; b=m1eoWmETWp2FRbYY/s0miY7juk3MT0bqQYf4Kj8Q+P3ftvWAop+OCnJdtFuDmzXVTGAivEZ7eKL2WGS0rer2OCc5AFiurtxzLcu2AotRYnkLL+ZFo+yMDELmcmnAYg6eKdeLS30DobFMMkt3TWzsvYj/TZnHpKxzrN8U/HFod7w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821345; c=relaxed/simple; bh=lU7BH8oCMbiZ+/PYaYBPefiTFP0KtGQbHTjc1XwlJjM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=XQIb3rs8JjCS29XklAIIPwUBGRUtVNhMiZqWU6Rx2fV1xxIJ7rzOf+k7cpCP8el0W2ak2n6hSicyCr+ZPZTGC5aMdgzJQe82iEJmegM01Abvy0FamB/N6d98hW/3MXCZXPPHQ+rloxa+XNKX0V+vxPDGXd7TsXm61VKaxwzbj7A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sJzwX-00049b-K4; Wed, 19 Jun 2024 20:22:01 +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 1sJzwW-003WTo-GR; Wed, 19 Jun 2024 20:22:00 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 04/14] drm/bridge: analogix_dp: handle clock via runtime PM Date: Wed, 19 Jun 2024 20:21:50 +0200 Message-Id: <20240619182200.3752465-4-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org There is no reason to enable the controller clock in driver probe, as there is no HW initialization done in this function. Instead rely on either runtime PM to handle the controller clock or statically enable it in the driver bind routine, after which real hardware access is required to work. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- .../drm/bridge/analogix/analogix_dp_core.c | 77 +++++++++++-------- 1 file changed, 44 insertions(+), 33 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index ae79802b62bb..4453d1672686 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1651,8 +1651,6 @@ analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data) return ERR_CAST(dp->clock); } - clk_prepare_enable(dp->clock); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); dp->reg_base = devm_ioremap_resource(&pdev->dev, res); @@ -1714,6 +1712,28 @@ analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data) } EXPORT_SYMBOL_GPL(analogix_dp_probe); +int analogix_dp_suspend(struct analogix_dp_device *dp) +{ + clk_disable_unprepare(dp->clock); + + return 0; +} +EXPORT_SYMBOL_GPL(analogix_dp_suspend); + +int analogix_dp_resume(struct analogix_dp_device *dp) +{ + int ret; + + ret = clk_prepare_enable(dp->clock); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(analogix_dp_resume); + int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev) { int ret; @@ -1721,9 +1741,15 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev) dp->drm_dev = drm_dev; dp->encoder = dp->plat_data->encoder; - pm_runtime_use_autosuspend(dp->dev); - pm_runtime_set_autosuspend_delay(dp->dev, 100); - pm_runtime_enable(dp->dev); + if (IS_ENABLED(CONFIG_PM)) { + pm_runtime_use_autosuspend(dp->dev); + pm_runtime_set_autosuspend_delay(dp->dev, 100); + pm_runtime_enable(dp->dev); + } else { + ret = analogix_dp_resume(dp); + if (ret) + return ret; + } dp->aux.name = "DP-AUX"; dp->aux.transfer = analogix_dpaux_transfer; @@ -1747,8 +1773,12 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev) err_unregister_aux: drm_dp_aux_unregister(&dp->aux); err_disable_pm_runtime: - pm_runtime_dont_use_autosuspend(dp->dev); - pm_runtime_disable(dp->dev); + if (IS_ENABLED(CONFIG_PM)) { + pm_runtime_dont_use_autosuspend(dp->dev); + pm_runtime_disable(dp->dev); + } else { + analogix_dp_suspend(dp); + } return ret; } @@ -1765,40 +1795,21 @@ void analogix_dp_unbind(struct analogix_dp_device *dp) } drm_dp_aux_unregister(&dp->aux); - pm_runtime_dont_use_autosuspend(dp->dev); - pm_runtime_disable(dp->dev); + + if (IS_ENABLED(CONFIG_PM)) { + pm_runtime_dont_use_autosuspend(dp->dev); + pm_runtime_disable(dp->dev); + } else { + analogix_dp_suspend(dp); + } } EXPORT_SYMBOL_GPL(analogix_dp_unbind); void analogix_dp_remove(struct analogix_dp_device *dp) { - clk_disable_unprepare(dp->clock); } EXPORT_SYMBOL_GPL(analogix_dp_remove); -#ifdef CONFIG_PM -int analogix_dp_suspend(struct analogix_dp_device *dp) -{ - clk_disable_unprepare(dp->clock); - return 0; -} -EXPORT_SYMBOL_GPL(analogix_dp_suspend); - -int analogix_dp_resume(struct analogix_dp_device *dp) -{ - int ret; - - ret = clk_prepare_enable(dp->clock); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret); - return ret; - } - - return 0; -} -EXPORT_SYMBOL_GPL(analogix_dp_resume); -#endif - int analogix_dp_start_crc(struct drm_connector *connector) { struct analogix_dp_device *dp = to_dp(connector); From patchwork Wed Jun 19 18:21:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704397 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 DD2EC157480 for ; Wed, 19 Jun 2024 18:22:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821343; cv=none; 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Wed, 19 Jun 2024 20:22:01 +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 1sJzwW-003WTo-Jj; Wed, 19 Jun 2024 20:22:00 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 05/14] drm/bridge: analogix_dp: remove unused analogix_dp_remove Date: Wed, 19 Jun 2024 20:21:51 +0200 Message-Id: <20240619182200.3752465-5-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org Now that the clock is handled dynamically through analogix_dp_resume/suspend and it isn't statically enabled in the driver probe routine, there is no need for the remove function anymore. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 5 ----- drivers/gpu/drm/exynos/exynos_dp.c | 3 --- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 9 +-------- include/drm/bridge/analogix_dp.h | 1 - 4 files changed, 1 insertion(+), 17 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 4453d1672686..7a5e25b6aa3a 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1805,11 +1805,6 @@ void analogix_dp_unbind(struct analogix_dp_device *dp) } EXPORT_SYMBOL_GPL(analogix_dp_unbind); -void analogix_dp_remove(struct analogix_dp_device *dp) -{ -} -EXPORT_SYMBOL_GPL(analogix_dp_remove); - int analogix_dp_start_crc(struct drm_connector *connector) { struct analogix_dp_device *dp = to_dp(connector); diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c index 8ad2ec5c6455..22142b293279 100644 --- a/drivers/gpu/drm/exynos/exynos_dp.c +++ b/drivers/gpu/drm/exynos/exynos_dp.c @@ -251,10 +251,7 @@ static int exynos_dp_probe(struct platform_device *pdev) static void exynos_dp_remove(struct platform_device *pdev) { - struct exynos_dp_device *dp = platform_get_drvdata(pdev); - component_del(&pdev->dev, &exynos_dp_ops); - analogix_dp_remove(dp->adp); } static int exynos_dp_suspend(struct device *dev) diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index 8214265f1497..362c7951ca4a 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -414,21 +414,14 @@ static int rockchip_dp_probe(struct platform_device *pdev) ret = component_add(dev, &rockchip_dp_component_ops); if (ret) - goto err_dp_remove; + return ret; return 0; - -err_dp_remove: - analogix_dp_remove(dp->adp); - return ret; } static void rockchip_dp_remove(struct platform_device *pdev) { - struct rockchip_dp_device *dp = platform_get_drvdata(pdev); - component_del(&pdev->dev, &rockchip_dp_component_ops); - analogix_dp_remove(dp->adp); } static int rockchip_dp_suspend(struct device *dev) diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h index 8709b6a74c0f..6002c5666031 100644 --- a/include/drm/bridge/analogix_dp.h +++ b/include/drm/bridge/analogix_dp.h @@ -44,7 +44,6 @@ struct analogix_dp_device * analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data); int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev); void analogix_dp_unbind(struct analogix_dp_device *dp); -void analogix_dp_remove(struct analogix_dp_device *dp); int analogix_dp_start_crc(struct drm_connector *connector); int analogix_dp_stop_crc(struct drm_connector *connector); From patchwork Wed Jun 19 18:21:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704396 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 DD2A215747F for ; Wed, 19 Jun 2024 18:22:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821343; cv=none; b=Gm24z7MZE76En1q+MDNjZKYH5LZ6FmZ/agqQ70p49HGk7yr1+8koIV1MJRraSJuwGH8rvVGKvXHBU7sqTE6mvYJzFYxGuzVGdk9tS6fY4gGImPvGafd07iUn0rhDTYOFdn+vCLljcYnuPtet+CHVzOvVKgo3kUgpf2hRPfq3Zws= ARC-Message-Signature: i=1; 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Wed, 19 Jun 2024 20:22:00 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 06/14] drm/bridge: analogix_dp: remove clk handling from analogix_dp_set_bridge Date: Wed, 19 Jun 2024 20:21:52 +0200 Message-Id: <20240619182200.3752465-6-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org The clock is already managed by runtime PM, which is properly invoked from the analogix_dp_set_bridge function, so there is no need for an additional reference. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 7a5e25b6aa3a..d8c0751ab5c0 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1251,12 +1251,6 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) pm_runtime_get_sync(dp->dev); - ret = clk_prepare_enable(dp->clock); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret); - goto out_dp_clk_pre; - } - if (dp->plat_data->power_on) dp->plat_data->power_on(dp->plat_data); @@ -1290,8 +1284,7 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) phy_power_off(dp->phy); if (dp->plat_data->power_off) dp->plat_data->power_off(dp->plat_data); - clk_disable_unprepare(dp->clock); -out_dp_clk_pre: + pm_runtime_put_sync(dp->dev); return ret; @@ -1360,8 +1353,6 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge) analogix_dp_set_analog_power_down(dp, POWER_ALL, 1); phy_power_off(dp->phy); - clk_disable_unprepare(dp->clock); - pm_runtime_put_sync(dp->dev); ret = analogix_dp_prepare_panel(dp, false, true); From patchwork Wed Jun 19 18:21:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704401 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 AF756157A61 for ; Wed, 19 Jun 2024 18:22:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821346; cv=none; b=hyBj2YSD2Y83KTIRU6tmwzqZM55ufUaVDZakmwzd58WH0/FIXfSABjqVjd7ATVWzbMuAh9lbsbvRzwahcoO6g+wUTT+2l9j6zZw1EVcgDoA/d3hN1lX0rRbAlOh/0wZe7C5z9tKM9adxutcALy86Oyh3FNkCybRnS333ltFlzGM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821346; c=relaxed/simple; bh=uy7FRXOHgxK0a1U3UDEuHFxXxNjAG4/jZoTTK+ILehk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=uqF/9haz3qO4OZfp8MOcwfr5Py4yNtVbQ8WlrTaZe84A+1vz/mvpoJIetvSmJ3MGm75cyJqhBFgcDhcbmIm5gFzplVm0pTSF2GdribmNFN3WGQo4MFG3icJ8HCtL7iApqC6DnCeEu2c7+D/Zmk68nLJoWxTok8PdQHo7hs4je1M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sJzwX-00049e-K3; Wed, 19 Jun 2024 20:22:01 +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 1sJzwW-003WTo-Oe; Wed, 19 Jun 2024 20:22:00 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 07/14] drm/bridge: analogix_dp: move platform and PHY power handling into runtime PM Date: Wed, 19 Jun 2024 20:21:53 +0200 Message-Id: <20240619182200.3752465-7-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org Platform and PHY power isn't only required when the actual display data stream is active, but may be required earlier to support AUX channel transactions. Move them into the runtime PM calls, so they are properly managed whenever various other parts of the driver need them to be active. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- .../drm/bridge/analogix/analogix_dp_core.c | 23 ++++++++----------- 1 file changed, 10 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index d8c0751ab5c0..d2b6d5a87188 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1251,11 +1251,6 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) pm_runtime_get_sync(dp->dev); - if (dp->plat_data->power_on) - dp->plat_data->power_on(dp->plat_data); - - phy_power_on(dp->phy); - ret = analogix_dp_init_dp(dp); if (ret) goto out_dp_init; @@ -1281,10 +1276,6 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) return 0; out_dp_init: - phy_power_off(dp->phy); - if (dp->plat_data->power_off) - dp->plat_data->power_off(dp->plat_data); - pm_runtime_put_sync(dp->dev); return ret; @@ -1347,11 +1338,7 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge) disable_irq(dp->irq); - if (dp->plat_data->power_off) - dp->plat_data->power_off(dp->plat_data); - analogix_dp_set_analog_power_down(dp, POWER_ALL, 1); - phy_power_off(dp->phy); pm_runtime_put_sync(dp->dev); @@ -1705,6 +1692,11 @@ EXPORT_SYMBOL_GPL(analogix_dp_probe); int analogix_dp_suspend(struct analogix_dp_device *dp) { + phy_power_off(dp->phy); + + if (dp->plat_data->power_off) + dp->plat_data->power_off(dp->plat_data); + clk_disable_unprepare(dp->clock); return 0; @@ -1721,6 +1713,11 @@ int analogix_dp_resume(struct analogix_dp_device *dp) return ret; } + if (dp->plat_data->power_on) + dp->plat_data->power_on(dp->plat_data); + + phy_power_on(dp->phy); + return 0; } EXPORT_SYMBOL_GPL(analogix_dp_resume); From patchwork Wed Jun 19 18:21:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704402 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 CD243157A67 for ; 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dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sJzwX-00049f-KA; Wed, 19 Jun 2024 20:22:01 +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 1sJzwW-003WTo-Rr; Wed, 19 Jun 2024 20:22:00 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 08/14] drm/bridge: analogix_dp: move basic controller init into runtime PM Date: Wed, 19 Jun 2024 20:21:54 +0200 Message-Id: <20240619182200.3752465-8-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org Make sure the controller is in a basic working state after runtime resume. Keep the analog function enable in the mode set path as this enables parts of the PHY that are only required to be powered when there is a data stream being sent out. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index d2b6d5a87188..c852d9517c27 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -41,10 +41,8 @@ struct bridge_init { struct device_node *node; }; -static int analogix_dp_init_dp(struct analogix_dp_device *dp) +static void analogix_dp_init_dp(struct analogix_dp_device *dp) { - int ret; - analogix_dp_reset(dp); analogix_dp_swreset(dp); @@ -56,13 +54,9 @@ static int analogix_dp_init_dp(struct analogix_dp_device *dp) analogix_dp_enable_sw_function(dp); analogix_dp_config_interrupt(dp); - ret = analogix_dp_init_analog_func(dp); - if (ret) - return ret; analogix_dp_init_hpd(dp); analogix_dp_init_aux(dp); - return 0; } static int analogix_dp_detect_hpd(struct analogix_dp_device *dp) @@ -1251,9 +1245,9 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) pm_runtime_get_sync(dp->dev); - ret = analogix_dp_init_dp(dp); + ret = analogix_dp_init_analog_func(dp); if (ret) - goto out_dp_init; + return ret; /* * According to DP spec v1.3 chap 3.5.1.2 Link Training, @@ -1718,6 +1712,8 @@ int analogix_dp_resume(struct analogix_dp_device *dp) phy_power_on(dp->phy); + analogix_dp_init_dp(dp); + return 0; } EXPORT_SYMBOL_GPL(analogix_dp_resume); From patchwork Wed Jun 19 18:21:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704394 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 9787915252C for ; Wed, 19 Jun 2024 18:22:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821342; cv=none; b=LT+bzPjXj/N0YQDz6+NNsl/Hwv2GBzuDoKRSz+pZfmeOQuqfDi4wi+fa9hKRTSPe0qSKVNLy2YUNebQ4PHYuYvNTwosC+HkUXB3kRMl3nJHoI14Ez4SYoYAGKKBEY0TXlEYmJkJxTUmNM9LJmgSJb2abrA50UWn2ssZxcKTFI6k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821342; c=relaxed/simple; bh=xl7JBVCboVplKePZ+LWZvbJgXJvLcOdS+pfYu7HsObI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=CABvDrZ7BsF8h8lLoMeZcCGQXhFAZTWVDAfzdAwc8ktbi4hrANelhfCLo3gcfm8gGq2FqmpHtJnL8xrLhIvyCrs+judvMIC0RbUxtctwhyfMkCiV2ndhQctRwShDAcuMbe3Nrlwo1oQyvQ27Dhx/IU1qxcbMxBoIUidec8qXMNw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sJzwX-00049g-K8; Wed, 19 Jun 2024 20:22:01 +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 1sJzwW-003WTo-V5; Wed, 19 Jun 2024 20:22:01 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 09/14] drm/bridge: analogix_dp: remove PLL lock check from analogix_dp_config_video Date: Wed, 19 Jun 2024 20:21:55 +0200 Message-Id: <20240619182200.3752465-9-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org This check is way too late in the DP enable flow. The PLL must be locked much earlier, before any link training can happen. If the PLL is unlocked at that point in time there is something seriously wrong in the enable flow. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index c852d9517c27..bbf2c0808ace 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -717,11 +717,6 @@ static int analogix_dp_config_video(struct analogix_dp_device *dp) analogix_dp_set_video_color_format(dp); - if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { - dev_err(dp->dev, "PLL is not locked yet.\n"); - return -EINVAL; - } - for (;;) { timeout_loop++; if (analogix_dp_is_slave_video_stream_clock_on(dp) == 0) From patchwork Wed Jun 19 18:21:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704395 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 978C1155346 for ; Wed, 19 Jun 2024 18:22:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821342; cv=none; b=uqqb30NUgYdadSA2ILeoixIm/wUV8U0FQsCITlQBXeObtZrCLngAxPwZTLe4Jzqj434sjGOigpQkeCYTh5CCmSKWZ7cfF4j/sJIjVQr8gbiT9Mi5zUjUbjwc29Ay381j+M+8l4+nvWmzFRAasP2OMN5hmrc0VYsNyqjTyCZR1Rw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718821342; c=relaxed/simple; bh=9KciZRo1qp7ZOj3ZkNrtmmD7WgHqGDXOL6z7FucHtTo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=LN6uLQuTtceZaX5USvz7YdF0jAO0sdvHOhppAbQLzdYovAsFA4Mtuuvr2Q8AsQG7rTns9SDpJ8bDwaJGDbPe7E9OVwlZgfmPGj8xahs7l6ZsnISodJ+PkRoSXqCNWIhq1uRFiX8J/YJfFcdVXzHEWDYm2GIm3K6SEv/hCygIXg0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sJzwX-00049h-K6; Wed, 19 Jun 2024 20:22:01 +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 1sJzwX-003WTo-1y; Wed, 19 Jun 2024 20:22:01 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 10/14] drm/bridge: analogix_dp: move macro reset after link bandwidth setting Date: Wed, 19 Jun 2024 20:21:56 +0200 Message-Id: <20240619182200.3752465-10-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org Setting the link bandwidth may change the PLL parameters, which will cause the PLL to go out of lock, so make sure to apply the MACRO_RST, which according to the comment is required to be pulsed after the PLL is locked. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- .../gpu/drm/bridge/analogix/analogix_dp_core.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index bbf2c0808ace..d2c7a9117ce3 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -243,6 +243,11 @@ static int analogix_dp_link_start(struct analogix_dp_device *dp) /* Set link rate and count as you want to establish*/ analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate); + /* + * MACRO_RST must be applied after the PLL_LOCK to avoid + * the DP inter pair skew issue for at least 10 us + */ + analogix_dp_reset_macro(dp); analogix_dp_set_lane_count(dp, dp->link_train.lane_count); /* Setup RX configuration */ @@ -562,12 +567,6 @@ static int analogix_dp_full_link_train(struct analogix_dp_device *dp, int retval = 0; bool training_finished = false; - /* - * MACRO_RST must be applied after the PLL_LOCK to avoid - * the DP inter pair skew issue for at least 10 us - */ - analogix_dp_reset_macro(dp); - /* Initialize by reading RX's DPCD */ analogix_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate); analogix_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count); @@ -634,9 +633,12 @@ static int analogix_dp_fast_link_train(struct analogix_dp_device *dp) u8 link_align, link_status[2]; enum pll_status status; - analogix_dp_reset_macro(dp); - analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate); + /* + * MACRO_RST must be applied after the PLL_LOCK to avoid + * the DP inter pair skew issue for at least 10 us + */ + analogix_dp_reset_macro(dp); analogix_dp_set_lane_count(dp, dp->link_train.lane_count); analogix_dp_set_lane_link_training(dp); From patchwork Wed Jun 19 18:21:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704450 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 0FA651876 for ; 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dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sK0H6-0005c6-VO; Wed, 19 Jun 2024 20:43:16 +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 1sJzwX-003WTo-5J; Wed, 19 Jun 2024 20:22:01 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 11/14] drm/bridge: analogix_dp: don't wait for PLL lock too early Date: Wed, 19 Jun 2024 20:21:57 +0200 Message-Id: <20240619182200.3752465-11-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org The PLL will be reconfigured later, which may cause it to go out of lock anyway, so there is no point in waiting for the PLL to lock here. Instead we can continue execution of the link setup, which will properly set the PLL parameters and will wait for the PLL to lock at the appropriate times. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index d267cf05cbca..e9c643a8b6fc 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -356,7 +356,6 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, int analogix_dp_init_analog_func(struct analogix_dp_device *dp) { u32 reg; - int timeout_loop = 0; analogix_dp_set_analog_power_down(dp, POWER_ALL, 0); @@ -368,18 +367,7 @@ int analogix_dp_init_analog_func(struct analogix_dp_device *dp) writel(reg, dp->reg_base + ANALOGIX_DP_DEBUG_CTL); /* Power up PLL */ - if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { - analogix_dp_set_pll_power_down(dp, 0); - - while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { - timeout_loop++; - if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { - dev_err(dp->dev, "failed to get pll lock status\n"); - return -ETIMEDOUT; - } - usleep_range(10, 20); - } - } + analogix_dp_set_pll_power_down(dp, 0); /* Enable Serdes FIFO function and Link symbol clock domain module */ reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2); From patchwork Wed Jun 19 18:21:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704453 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 997441876 for ; Wed, 19 Jun 2024 18:43:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718822618; cv=none; b=oyyT1ThrIT3tXPa03jTiDVdmb9ONduEbCA1o/LgDSp+8Jsh6PXdvjnZxGbRxjjK1rsCYgln7dzWRDZh2TJubKXnoKipJxxtp3IKZL+eTyQ5xTkpTTXznUEIrZ6VZA6ytFBwwz2HbUEhrpjZzSN5rmpmRjP5Vro5rhBk9NitgOEM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718822618; c=relaxed/simple; bh=VUZvZcNQBiO8BGlfI6k9igV+hoAiA0i2uvdi4RiZBzA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Kw5ed4ieSDkMbtV0qr8rfyssFB1OZj2Tezg2KMCFD59oZsN9oqBaSQmstN93lYgon9N2cNuqYVyCkjpqIgugsAdgKmjDrSbppVuNu3Mn3Ux51GuXA9k7v5x+o/y+zJX+3+HoqEECXJmQpDIoZsXKl1b4tlh08o3p7pk3t4tTuzk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sK0H7-0005dP-Dc; Wed, 19 Jun 2024 20:43:17 +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 1sJzwX-003WTo-8S; Wed, 19 Jun 2024 20:22:01 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 12/14] drm/bridge: analogix_dp: simplify and correct PLL lock checks Date: Wed, 19 Jun 2024 20:21:58 +0200 Message-Id: <20240619182200.3752465-12-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org Move the wait loop into its own function, so it doesn't need to be replicated in multiple locations. Also move the PLL lock checks between setting the link bandwidth, which may cause the PLL to unlock, and the MACRO_RST which needs the PLL to be locked. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- .../drm/bridge/analogix/analogix_dp_core.c | 34 +++++++------------ .../drm/bridge/analogix/analogix_dp_core.h | 7 +--- .../gpu/drm/bridge/analogix/analogix_dp_reg.c | 12 +++---- 3 files changed, 18 insertions(+), 35 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index d2c7a9117ce3..ddf1e4424ffd 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -231,7 +231,7 @@ static int analogix_dp_training_pattern_dis(struct analogix_dp_device *dp) static int analogix_dp_link_start(struct analogix_dp_device *dp) { u8 buf[4]; - int lane, lane_count, pll_tries, retval; + int lane, lane_count, retval; lane_count = dp->link_train.lane_count; @@ -243,6 +243,11 @@ static int analogix_dp_link_start(struct analogix_dp_device *dp) /* Set link rate and count as you want to establish*/ analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate); + retval = analogix_dp_wait_pll_locked(dp); + if (retval) { + DRM_DEV_ERROR(dp->dev, "Wait for pll lock failed %d\n", retval); + return retval; + } /* * MACRO_RST must be applied after the PLL_LOCK to avoid * the DP inter pair skew issue for at least 10 us @@ -270,18 +275,6 @@ static int analogix_dp_link_start(struct analogix_dp_device *dp) DP_TRAIN_PRE_EMPH_LEVEL_0; analogix_dp_set_lane_link_training(dp); - /* Wait for PLL lock */ - pll_tries = 0; - while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { - if (pll_tries == DP_TIMEOUT_LOOP_COUNT) { - dev_err(dp->dev, "Wait for PLL lock timed out\n"); - return -ETIMEDOUT; - } - - pll_tries++; - usleep_range(90, 120); - } - /* Set training pattern 1 */ analogix_dp_set_training_pattern(dp, TRAINING_PTN1); @@ -631,9 +624,14 @@ static int analogix_dp_fast_link_train(struct analogix_dp_device *dp) { int ret; u8 link_align, link_status[2]; - enum pll_status status; analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate); + ret = analogix_dp_wait_pll_locked(dp); + if (ret) { + DRM_DEV_ERROR(dp->dev, "Wait for pll lock failed %d\n", ret); + return ret; + } + /* * MACRO_RST must be applied after the PLL_LOCK to avoid * the DP inter pair skew issue for at least 10 us @@ -642,14 +640,6 @@ static int analogix_dp_fast_link_train(struct analogix_dp_device *dp) analogix_dp_set_lane_count(dp, dp->link_train.lane_count); analogix_dp_set_lane_link_training(dp); - ret = readx_poll_timeout(analogix_dp_get_pll_lock_status, dp, status, - status != PLL_UNLOCKED, 120, - 120 * DP_TIMEOUT_LOOP_COUNT); - if (ret) { - DRM_DEV_ERROR(dp->dev, "Wait for pll lock failed %d\n", ret); - return ret; - } - /* source Set training pattern 1 */ analogix_dp_set_training_pattern(dp, TRAINING_PTN1); /* From DP spec, pattern must be on-screen for a minimum 500us */ diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index 382b2f068ab9..774d11574b09 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -95,11 +95,6 @@ enum dynamic_range { CEA }; -enum pll_status { - PLL_UNLOCKED, - PLL_LOCKED -}; - enum clock_recovery_m_value_type { CALCULATED_M, REGISTER_M @@ -191,7 +186,7 @@ void analogix_dp_swreset(struct analogix_dp_device *dp); void analogix_dp_config_interrupt(struct analogix_dp_device *dp); void analogix_dp_mute_hpd_interrupt(struct analogix_dp_device *dp); void analogix_dp_unmute_hpd_interrupt(struct analogix_dp_device *dp); -enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp); +int analogix_dp_wait_pll_locked(struct analogix_dp_device *dp); void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable); void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, enum analog_power_block block, diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index e9c643a8b6fc..143a78b1d156 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -217,15 +217,13 @@ void analogix_dp_unmute_hpd_interrupt(struct analogix_dp_device *dp) writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK); } -enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp) +int analogix_dp_wait_pll_locked(struct analogix_dp_device *dp) { - u32 reg; + u32 val; - reg = readl(dp->reg_base + ANALOGIX_DP_DEBUG_CTL); - if (reg & PLL_LOCK) - return PLL_LOCKED; - else - return PLL_UNLOCKED; + return readl_poll_timeout(dp->reg_base + ANALOGIX_DP_DEBUG_CTL, val, + val & PLL_LOCK, 120, + 120 * DP_TIMEOUT_LOOP_COUNT); } void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable) From patchwork Wed Jun 19 18:21:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704451 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 41E5577107 for ; Wed, 19 Jun 2024 18:43:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sK0H5-0005be-UT; Wed, 19 Jun 2024 20:43:15 +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 1sJzwX-003WTo-A7; Wed, 19 Jun 2024 20:22:01 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 13/14] drm/bridge: analogix_dp: only read AUX status when an error occured Date: Wed, 19 Jun 2024 20:21:59 +0200 Message-Id: <20240619182200.3752465-13-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org All AUX error responses raise the AUX_ERR interrupt, so there is no need to read the AUX status register in normal operation. Only read the status when an error occurred and we can expect a different status than OK. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index 143a78b1d156..0f016dca9f3d 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -924,7 +924,6 @@ ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, struct drm_dp_aux_msg *msg) { u32 reg; - u32 status_reg; u8 *buffer = msg->buffer; unsigned int i; int ret; @@ -1011,12 +1010,14 @@ ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, /* Clear interrupt source for AUX CH access error */ reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA); - status_reg = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_STA); - if ((reg & AUX_ERR) || (status_reg & AUX_STATUS_MASK)) { + if ((reg & AUX_ERR)) { + u32 aux_status = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_STA) & + AUX_STATUS_MASK; + writel(AUX_ERR, dp->reg_base + ANALOGIX_DP_INT_STA); dev_warn(dp->dev, "AUX CH error happened: %#x (%d)\n", - status_reg & AUX_STATUS_MASK, !!(reg & AUX_ERR)); + aux_status, !!(reg & AUX_ERR)); goto aux_error; } From patchwork Wed Jun 19 18:22:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13704452 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 99791158208 for ; Wed, 19 Jun 2024 18:43:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718822618; cv=none; b=Ts6jUBKiriJbTAJWqX4hDau+0rJFdDDRJvvUo/PqfFOvGuX4AFgtWO6MyQ9Znng/QlTAE796h8JVqV/PeU6T2zkUQ2DqHf8iA9ctFZ9T+HkWXhvf1t317DSIRwwuu1S9XNblfkoqJlXYsxEcI8V+fv8xUR7iUT4FdHtW8g6dyrU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718822618; c=relaxed/simple; bh=JoPFd2S16ULhDHHQ6GxvKU9BsK1TsjqdooGIKMYYeak=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aG/v2Xy5T/9gn+FRHD8QGnhtCBvs+i10NxRmQgIoc5onC7s8cx38wlgq0ulvCjB38NOKvxdBg+9lu35Du82U+nJbP0K1qvgPumTSPsS37k3i3N97lnHzysci4SYlB1yvD+L9y323oLOurVcT92ySbtdpLQTxoV9LCC8/zwNmZwA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sK0H6-0005bs-HP; Wed, 19 Jun 2024 20:43:16 +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 1sJzwX-003WTo-CF; Wed, 19 Jun 2024 20:22:01 +0200 From: Lucas Stach To: Robert Foss Cc: Neil Armstrong , Andrzej Hajda , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, patchwork-lst@pengutronix.de, kernel@pengutronix.de Subject: [PATCH v2 14/14] drm/bridge: analogix_dp: handle AUX transfer timeouts Date: Wed, 19 Jun 2024 20:22:00 +0200 Message-Id: <20240619182200.3752465-14-l.stach@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240619182200.3752465-1-l.stach@pengutronix.de> References: <20240619182200.3752465-1-l.stach@pengutronix.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-samsung-soc@vger.kernel.org Timeouts on the AUX bus are to be expected in certain normal operating conditions. There is no need to raise an error log or re-initialize the whole AUX state machine. Simply acknowledge the AUX_ERR interrupt and let upper layers know about the timeout. Signed-off-by: Lucas Stach Reviewed-by: Robert Foss Tested-by: Heiko Stuebner (rk3288-veyron and rk3399-gru) --- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 3 +++ drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h | 9 +++++++++ 2 files changed, 12 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index 0f016dca9f3d..3afc73c858c4 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -1016,6 +1016,9 @@ ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, writel(AUX_ERR, dp->reg_base + ANALOGIX_DP_INT_STA); + if (aux_status == AUX_STATUS_TIMEOUT_ERROR) + return -ETIMEDOUT; + dev_warn(dp->dev, "AUX CH error happened: %#x (%d)\n", aux_status, !!(reg & AUX_ERR)); goto aux_error; diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h index e284ee8da58b..12735139046c 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h @@ -361,6 +361,15 @@ /* ANALOGIX_DP_AUX_CH_STA */ #define AUX_BUSY (0x1 << 4) #define AUX_STATUS_MASK (0xf << 0) +#define AUX_STATUS_OK (0x0 << 0) +#define AUX_STATUS_NACK_ERROR (0x1 << 0) +#define AUX_STATUS_TIMEOUT_ERROR (0x2 << 0) +#define AUX_STATUS_UNKNOWN_ERROR (0x3 << 0) +#define AUX_STATUS_MUCH_DEFER_ERROR (0x4 << 0) +#define AUX_STATUS_TX_SHORT_ERROR (0x5 << 0) +#define AUX_STATUS_RX_SHORT_ERROR (0x6 << 0) +#define AUX_STATUS_NACK_WITHOUT_M_ERROR (0x7 << 0) +#define AUX_STATUS_I2C_NACK_ERROR (0x8 << 0) /* ANALOGIX_DP_AUX_CH_DEFER_CTL */ #define DEFER_CTRL_EN (0x1 << 7)