From patchwork Thu Nov 2 15:12:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 13443844 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5ABE6C4167D for ; Thu, 2 Nov 2023 15:13:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9CE4310E8EB; Thu, 2 Nov 2023 15:12:45 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7E4FB10E90A; Thu, 2 Nov 2023 15:12:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698937961; x=1730473961; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=U916ePMmAwBoX5bKvIh4POiqEwJn346oKhQfL/AepWk=; b=GK1L9wJyDGHcnEwKoYtsVwRLA75xZgzOjBQrKLtfN+KFHexKnesx0qrJ vKc1TFakQtPmWLIuny5H8nTsP0lzMiMn8jA9ApOFPkmZq3O8Vd/V8RHAi Hg043KE1uLuJveDIMfKMDA23UobURh2TdH0Mg8JmZqGYSRf+ansTWAycH GH9H7cqvz7rqpFIy3tWE0d1QrLdh6C+IIwWJYBDuqxxkkIQACOqUe+0eQ FlntPw9LVKuZqO/ZImJ3IQTcXLGtg3DvapzJK0Hi8rwhL7cWoZvPGOKLI TWQJHU7NPrewR/790fjSHv74ZmgvzZ54EaVFMY58W8VtOgwRYM0NCPNqO g==; X-IronPort-AV: E=McAfee;i="6600,9927,10882"; a="1660178" X-IronPort-AV: E=Sophos;i="6.03,271,1694761200"; d="scan'208";a="1660178" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Nov 2023 08:12:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10882"; a="737784570" X-IronPort-AV: E=Sophos;i="6.03,271,1694761200"; d="scan'208";a="737784570" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga006.jf.intel.com with ESMTP; 02 Nov 2023 08:12:36 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 285F7706; Thu, 2 Nov 2023 17:12:31 +0200 (EET) From: Andy Shevchenko To: Jani Nikula , Andy Shevchenko , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 12/15] drm/i915/dsi: Replace poking of VLV GPIOs behind the driver's back Date: Thu, 2 Nov 2023 17:12:25 +0200 Message-Id: <20231102151228.668842-13-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.40.0.1.gaa8946217a0b In-Reply-To: <20231102151228.668842-1-andriy.shevchenko@linux.intel.com> References: <20231102151228.668842-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tvrtko Ursulin , Hans de Goede , Rodrigo Vivi Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" It's a dirty hack in the driver that pokes GPIO registers behind the driver's back. Moreoever it might be problematic as simultaneous I/O may hang the system, see the commit 40ecab551232 ("pinctrl: baytrail: Really serialize all register accesses") for the details. Taking all this into consideration replace the hack with proper GPIO APIs being used. Signed-off-by: Andy Shevchenko --- drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 98 ++++++-------------- 1 file changed, 28 insertions(+), 70 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c index 9847a92fdfc3..552bc6564d79 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c @@ -55,43 +55,6 @@ #define MIPI_VIRTUAL_CHANNEL_SHIFT 1 #define MIPI_PORT_SHIFT 3 -/* base offsets for gpio pads */ -#define VLV_GPIO_NC_0_HV_DDI0_HPD 0x4130 -#define VLV_GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120 -#define VLV_GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110 -#define VLV_GPIO_NC_3_PANEL0_VDDEN 0x4140 -#define VLV_GPIO_NC_4_PANEL0_BKLTEN 0x4150 -#define VLV_GPIO_NC_5_PANEL0_BKLTCTL 0x4160 -#define VLV_GPIO_NC_6_HV_DDI1_HPD 0x4180 -#define VLV_GPIO_NC_7_HV_DDI1_DDC_SDA 0x4190 -#define VLV_GPIO_NC_8_HV_DDI1_DDC_SCL 0x4170 -#define VLV_GPIO_NC_9_PANEL1_VDDEN 0x4100 -#define VLV_GPIO_NC_10_PANEL1_BKLTEN 0x40E0 -#define VLV_GPIO_NC_11_PANEL1_BKLTCTL 0x40F0 - -#define VLV_GPIO_PCONF0(base_offset) (base_offset) -#define VLV_GPIO_PAD_VAL(base_offset) ((base_offset) + 8) - -struct gpio_map { - u16 base_offset; - bool init; -}; - -static struct gpio_map vlv_gpio_table[] = { - { VLV_GPIO_NC_0_HV_DDI0_HPD }, - { VLV_GPIO_NC_1_HV_DDI0_DDC_SDA }, - { VLV_GPIO_NC_2_HV_DDI0_DDC_SCL }, - { VLV_GPIO_NC_3_PANEL0_VDDEN }, - { VLV_GPIO_NC_4_PANEL0_BKLTEN }, - { VLV_GPIO_NC_5_PANEL0_BKLTCTL }, - { VLV_GPIO_NC_6_HV_DDI1_HPD }, - { VLV_GPIO_NC_7_HV_DDI1_DDC_SDA }, - { VLV_GPIO_NC_8_HV_DDI1_DDC_SCL }, - { VLV_GPIO_NC_9_PANEL1_VDDEN }, - { VLV_GPIO_NC_10_PANEL1_BKLTEN }, - { VLV_GPIO_NC_11_PANEL1_BKLTCTL }, -}; - struct i2c_adapter_lookup { u16 slave_addr; struct intel_dsi *intel_dsi; @@ -268,52 +231,47 @@ static void soc_gpio_set_value(struct intel_connector *connector, const char *co } } +static void soc_opaque_gpio_set_value(struct intel_connector *connector, + const char *chip, const char *con_id, + u8 gpio_index, bool value) +{ + struct gpiod_lookup_table *lookup; + + lookup = kzalloc(struct_size(lookup, table, 2), GFP_KERNEL); + if (!lookup) + return; + + lookup->dev_id = "0000:00:02.0"; + lookup->table[0] = + GPIO_LOOKUP_IDX(chip, gpio_index, con_id, gpio_index, GPIO_ACTIVE_HIGH); + + gpiod_add_lookup_table(lookup); + + soc_gpio_set_value(connector, con_id, gpio_index, value); + + gpiod_remove_lookup_table(lookup); + kfree(lookup); +} + static void vlv_gpio_set_value(struct intel_connector *connector, u8 gpio_source, u8 gpio_index, bool value) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct gpio_map *map; - u16 pconf0, padval; - u32 tmp; - u8 port; - if (gpio_index >= ARRAY_SIZE(vlv_gpio_table)) { - drm_dbg_kms(&dev_priv->drm, "unknown gpio index %u\n", - gpio_index); - return; - } - - map = &vlv_gpio_table[gpio_index]; - - if (connector->panel.vbt.dsi.seq_version >= 3) { - /* XXX: this assumes vlv_gpio_table only has NC GPIOs. */ - port = IOSF_PORT_GPIO_NC; - } else { - if (gpio_source == 0) { - port = IOSF_PORT_GPIO_NC; - } else if (gpio_source == 1) { + /* XXX: this assumes vlv_gpio_table only has NC GPIOs. */ + if (connector->panel.vbt.dsi.seq_version < 3) { + if (gpio_source == 1) { drm_dbg_kms(&dev_priv->drm, "SC gpio not supported\n"); return; - } else { + } + if (gpio_source > 1) { drm_dbg_kms(&dev_priv->drm, "unknown gpio source %u\n", gpio_source); return; } } - pconf0 = VLV_GPIO_PCONF0(map->base_offset); - padval = VLV_GPIO_PAD_VAL(map->base_offset); - - vlv_iosf_sb_get(dev_priv, BIT(VLV_IOSF_SB_GPIO)); - if (!map->init) { - /* FIXME: remove constant below */ - vlv_iosf_sb_write(dev_priv, port, pconf0, 0x2000CC00); - map->init = true; - } - - tmp = 0x4 | value; - vlv_iosf_sb_write(dev_priv, port, padval, tmp); - vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO)); + soc_opaque_gpio_set_value(connector, "INT33FC:01", "Panel N", gpio_index, value); } static void chv_gpio_set_value(struct intel_connector *connector,