From patchwork Fri Jun 24 20:26:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Kevin Brace X-Patchwork-Id: 12895040 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 91509C43334 for ; Fri, 24 Jun 2022 20:28:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0F73610E870; Fri, 24 Jun 2022 20:28:02 +0000 (UTC) Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) by gabe.freedesktop.org (Postfix) with ESMTPS id DF8C410E870 for ; Fri, 24 Jun 2022 20:28:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1656102478; bh=t0Y94i+sp5jjrrl5kzK/bZIBiE1Wzp6z96Nv2fMAMdk=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=HxJbeEeAO4Rrfy0U7cIIB95MYuuuX1eUikp8FY+7VEMiNgQuYnnX7rCRdhh2el89v PFjBn2ae5xDclSmLjCZ+jo3nULpbqD1dF/DLG/O6+l+ajQfOBo9tG1TjiXERQJineU Z/5AdqcG8iIjibA7MrHJaB22lKm/sQhHT8Acd5Z0= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from localhost.localdomain ([174.250.50.5]) by mail.gmx.net (mrgmx004 [212.227.17.184]) with ESMTPSA (Nemesis) id 1MpDNl-1nJPDJ3t43-00qhPB; Fri, 24 Jun 2022 22:27:57 +0200 From: Kevin Brace To: dri-devel@lists.freedesktop.org Subject: [PATCH 09/28] drm/via: Add via_dac.c Date: Fri, 24 Jun 2022 15:26:14 -0500 Message-Id: <20220624202633.3978-10-kevinbrace@gmx.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220624202633.3978-1-kevinbrace@gmx.com> References: <20220624202633.3978-1-kevinbrace@gmx.com> MIME-Version: 1.0 X-Provags-ID: V03:K1:QpgaHihg2VY0HU2ZaxkPMQWKkcVH6nwltluVjtACfaQ5lXrLHn/ QbXi0DbKxm97r0OHJJ1wT47kKsqH0Exk+RqNdQQTXXzcuvKiTFIXr7dMwteol36dDZbtN7V wD0UcCp0JH+TeWWpaYat1my3LKNkgTTkz8dLzM4e0CCh3njCKHexWz/9tG8F352Y8D9c2xM 33XJdl6F4JtwuLoaZgcbg== X-UI-Out-Filterresults: notjunk:1;V03:K0:33+J/pMMuuQ=:u7lnT1m9tG76IkOaw1VRkR 79dn1CnRQISOkCLXQozyL1oB2aG/tMbHwD/1/iguY8ulQxTBbTu2eiLFMNipR0rqVBkoWx6tY pfbQFdkGKhdoFIxO79rPjI9dxXIWT/HcVcWVKsADLvCM3Y4OkdZS189vQA/KaX4gGLyWiLPEN h354XcMHDu+rljOWpiCZ3qHPVeVckhwa1rKrRkK8Jb/Yfnxl5nwm/XhoWnB1VapQDWnxBcjpI 2z2RCiJEFoA0ao2uYwF++ZY1/W7mtxCeNFk3Gs9qJtmioDCiBFj4VEk6NGmJzYnegflPWhKAw xSI2kFhGKaD5idQUZu9iVoozbIECGiUnGolOQkLLmsbuS5UrGdbIfQxvhGbqm5SzKHM+/0C6U JZQY2DVapjFs2fkxtVfbnpZzzeAiGDgfKyxta/wALRoPjNBHk61aVx2PbPXNzFZcUSi1gfVs3 rLP+ESveIQAjMkz/gl9RmehyYA+xnh7zwq4A0aSRGZrLMs06ybL3NYrZKmwEbonGSh/TefTT7 UFnlNZ5h7Q3mwsXMap0YvJ5Iq0iHe1Nv1n5K/uSsQXPoAQ+g7Yb27s6Qv1plKE6k8Yg8CCmHx D+kgdhzfwt6S40oCZ9FxKRzeBmKEp1EuNbnyqAFuv0OPveu+XvOV1A4VQU8kKV8WvIDsG+96A W8RcxfQGRV/0R6g88d5zTalhp2T8URjFKuoNrFIr4rjAcsIEYNotg2gTjn1/93XJCey0Mtczg MQoUNwsVBWyE/c2kG0/VBM5BIOT0dhlKn01O557kgElp5BcjK/M541eBczTGhm0SHFM0KltMS 2sidgzpo0uZD6YV8BUihwLBLhF9iLbfqeYws2fBZaZU5wYZPAn6fykaqwjREvQ3sVzQFAE1mo nXfxK1sxJTAM1qtFMllU9sMUGublW9ZCKPns4WWy09MYLTJtoE+ovz9JoRjhN6FhuYGww9ISx qRTqYioN1lz7gV/W7ukb9i7+JTg07XClLpm/VJ/9sKRgR0qY8qGjAcS99QIhkDJVOtigUG9TA 5eg2Q4naeGQzFtJ3+pumjGrESAAAO+YZqfLXL8GdXQ3gb7cxDW3QaSNUB4j0hqwudXD078YSn POgTynTy5SIO9U6CryUOauUbTmizafp/p49jK96LhfuGdYORMx1BT8RPw== 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: Kevin Brace Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Kevin Brace Signed-off-by: Kevin Brace --- drivers/gpu/drm/via/via_dac.c | 504 ++++++++++++++++++++++++++++++++++ 1 file changed, 504 insertions(+) create mode 100644 drivers/gpu/drm/via/via_dac.c -- 2.35.1 diff --git a/drivers/gpu/drm/via/via_dac.c b/drivers/gpu/drm/via/via_dac.c new file mode 100644 index 000000000000..4921c93d1089 --- /dev/null +++ b/drivers/gpu/drm/via/via_dac.c @@ -0,0 +1,504 @@ +/* + * Copyright © 2016-2018 Kevin Brace. + * Copyright 2012 James Simmons. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Author(s): + * Kevin Brace + * James Simmons + */ + +#include + +#include +#include + +#include "via_crtc_hw.h" +#include "via_drv.h" + + +/* + * Enables or disables DAC (VGA) output. + */ +static void via_dac_power(struct via_drm_priv *dev_priv, bool outputState) +{ + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + + via_dac_set_power(VGABASE, outputState); + DRM_INFO("DAC (VGA) Power: %s\n", + outputState ? "On" : "Off"); + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +/* + * Set DAC (VGA) sync polarity. + */ +static void via_dac_sync_polarity(struct via_drm_priv *dev_priv, + unsigned int flags) +{ + u8 syncPolarity = 0x00; + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + if (flags & DRM_MODE_FLAG_NHSYNC) { + syncPolarity |= BIT(0); + } + + if (flags & DRM_MODE_FLAG_NVSYNC) { + syncPolarity |= BIT(1); + } + + via_dac_set_sync_polarity(VGABASE, syncPolarity); + DRM_INFO("DAC (VGA) Horizontal Sync Polarity: %s\n", + (syncPolarity & BIT(0)) ? "-" : "+"); + DRM_INFO("DAC (VGA) Vertical Sync Polarity: %s\n", + (syncPolarity & BIT(1)) ? "-" : "+"); + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +/* + * Sets DAC (VGA) display source. + */ +static void via_dac_display_source(struct via_drm_priv *dev_priv, + int index) +{ + u8 displaySource = index; + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + via_dac_set_display_source(VGABASE, displaySource & 0x01); + DRM_INFO("DAC (VGA) Display Source: IGA%d\n", + (displaySource & 0x01) + 1); + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +/* + * Routines for controlling stuff on the DAC port + */ +static const struct drm_encoder_funcs via_dac_enc_funcs = { + .destroy = via_encoder_cleanup, +}; + +/* + * Manage the power state of DAC (VGA). + */ +static void via_dac_dpms(struct drm_encoder *encoder, int mode) +{ + struct drm_device *dev = encoder->dev; + struct via_drm_priv *dev_priv = to_via_drm_priv(dev); + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + switch (mode) { + case DRM_MODE_DPMS_ON: + via_dac_set_dpms_control(VGABASE, VIA_DAC_DPMS_ON); + via_dac_power(dev_priv, true); + break; + case DRM_MODE_DPMS_STANDBY: + via_dac_set_dpms_control(VGABASE, VIA_DAC_DPMS_STANDBY); + via_dac_power(dev_priv, true); + break; + case DRM_MODE_DPMS_SUSPEND: + via_dac_set_dpms_control(VGABASE, VIA_DAC_DPMS_SUSPEND); + via_dac_power(dev_priv, true); + break; + case DRM_MODE_DPMS_OFF: + via_dac_set_dpms_control(VGABASE, VIA_DAC_DPMS_OFF); + via_dac_power(dev_priv, false); + break; + default: + DRM_ERROR("Bad DPMS mode."); + break; + } + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +/* Pass our mode to the connectors and the CRTC to give them a chance to + * adjust it according to limitations or connector properties, and also + * a chance to reject the mode entirely. Useful for things like scaling. + */ +static bool via_dac_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + drm_mode_set_crtcinfo(adjusted_mode, 0); + return true; +} + +/* + * Handle DAC (VGA) mode setting. + */ +static void via_dac_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct drm_device *dev = encoder->dev; + struct via_drm_priv *dev_priv = to_via_drm_priv(dev); + struct via_crtc *iga = container_of(encoder->crtc, struct via_crtc, base); + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + via_dac_sync_polarity(dev_priv, adjusted_mode->flags); + via_dac_display_source(dev_priv, iga->index); + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +static void via_dac_prepare(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct via_drm_priv *dev_priv = to_via_drm_priv(dev); + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + if (encoder->crtc) { + via_dac_set_dpms_control(VGABASE, VIA_DAC_DPMS_OFF); + via_dac_power(dev_priv, false); + } + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +static void via_dac_commit(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct via_drm_priv *dev_priv = to_via_drm_priv(dev); + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + if (encoder->crtc) { + via_dac_set_dpms_control(VGABASE, VIA_DAC_DPMS_ON); + via_dac_power(dev_priv, true); + } + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +static void via_dac_disable(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct via_drm_priv *dev_priv = to_via_drm_priv(dev); + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + via_dac_set_dpms_control(VGABASE, VIA_DAC_DPMS_OFF); + via_dac_power(dev_priv, false); + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +static const struct drm_encoder_helper_funcs via_dac_enc_helper_funcs = { + .dpms = via_dac_dpms, + .mode_fixup = via_dac_mode_fixup, + .mode_set = via_dac_mode_set, + .prepare = via_dac_prepare, + .commit = via_dac_commit, + .disable = via_dac_disable, +}; + +static enum drm_connector_status +via_dac_detect(struct drm_connector *connector, bool force) +{ + struct via_connector *con = container_of(connector, + struct via_connector, base); + enum drm_connector_status ret = connector_status_disconnected; + struct i2c_adapter *i2c_bus; + struct edid *edid = NULL; + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + if (con->i2c_bus & VIA_I2C_BUS1) { + i2c_bus = via_find_ddc_bus(0x26); + } else { + i2c_bus = NULL; + } + + if (i2c_bus) { + edid = drm_get_edid(&con->base, i2c_bus); + if (edid) { + if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) { + ret = connector_status_connected; + } + + kfree(edid); + goto exit; + } + } + + if (con->i2c_bus & VIA_I2C_BUS2) { + i2c_bus = via_find_ddc_bus(0x31); + } else { + i2c_bus = NULL; + } + + if (i2c_bus) { + edid = drm_get_edid(&con->base, i2c_bus); + if (edid) { + if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) { + ret = connector_status_connected; + } + + kfree(edid); + goto exit; + } + } + +exit: + DRM_DEBUG_KMS("Exiting %s.\n", __func__); + return ret; +} + +static const struct drm_connector_funcs via_dac_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .detect = via_dac_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = via_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = + drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = + drm_atomic_helper_connector_destroy_state, +}; + +static enum drm_mode_status via_dac_mode_valid( + struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct drm_device *dev = connector->dev; + struct pci_dev *pdev = to_pci_dev(dev->dev); + int min_clock, max_clock; + enum drm_mode_status status = MODE_OK; + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + min_clock = 25000; + switch (pdev->device) { + /* CLE266 Chipset */ + case PCI_DEVICE_ID_VIA_CLE266: + /* KM400(A) / KN400(A) / P4M800 Chipset */ + case PCI_DEVICE_ID_VIA_KM400: + max_clock = 250000; + break; + /* K8M800(A) / K8N800(A) Chipset */ + case PCI_DEVICE_ID_VIA_K8M800: + /* P4M800 Pro / P4M800CE / VN800 / CN700 / CN333 / CN400 Chipset */ + case PCI_DEVICE_ID_VIA_CN700: + max_clock = 300000; + break; + /* PM800 / PN800 / PM880 / PN880 Chipset */ + case PCI_DEVICE_ID_VIA_PM800: + /* P4M890 / P4N890 Chipset */ + case PCI_DEVICE_ID_VIA_VT3343: + /* K8M890 / K8N890 Chipset */ + case PCI_DEVICE_ID_VIA_K8M890: + /* P4M900 / VN896 / CN896 Chipset */ + case PCI_DEVICE_ID_VIA_P4M900: + /* CX700(M/M2) / VX700(M/M2) Chipset */ + case PCI_DEVICE_ID_VIA_VT3157: + /* VX800 / VX820 Chipset */ + case PCI_DEVICE_ID_VIA_VT1122: + /* VX855 / VX875 Chipset */ + case PCI_DEVICE_ID_VIA_VX875: + /* VX900(H) Chipset */ + case PCI_DEVICE_ID_VIA_VX900_VGA: + max_clock = 350000; + break; + /* Illegal condition (should never get here) */ + default: + max_clock = 0; + break; + } + + if (mode->flags & DRM_MODE_FLAG_DBLSCAN) { + status = MODE_NO_DBLESCAN; + goto exit; + } + + if (mode->clock < min_clock) { + status = MODE_CLOCK_LOW; + goto exit; + } + + if (mode->clock > max_clock) { + status = MODE_CLOCK_HIGH; + goto exit; + } + +exit: + DRM_DEBUG_KMS("status: %u\n", status); + DRM_DEBUG_KMS("Exiting %s.\n", __func__); + return status; +} + +static int via_dac_get_modes(struct drm_connector *connector) +{ + struct via_connector *con = container_of(connector, + struct via_connector, base); + int count = 0; + struct i2c_adapter *i2c_bus; + struct edid *edid = NULL; + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + if (con->i2c_bus & VIA_I2C_BUS1) { + i2c_bus = via_find_ddc_bus(0x26); + } else { + i2c_bus = NULL; + } + + if (i2c_bus) { + edid = drm_get_edid(&con->base, i2c_bus); + if (edid) { + if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) { + drm_connector_update_edid_property(connector, + edid); + count = drm_add_edid_modes(connector, edid); + } + + kfree(edid); + goto exit; + } + } + + if (con->i2c_bus & VIA_I2C_BUS2) { + i2c_bus = via_find_ddc_bus(0x31); + } else { + i2c_bus = NULL; + } + + if (i2c_bus) { + edid = drm_get_edid(&con->base, i2c_bus); + if (edid) { + if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) { + drm_connector_update_edid_property(connector, + edid); + count = drm_add_edid_modes(connector, edid); + } + + kfree(edid); + goto exit; + } + } + +exit: + DRM_DEBUG_KMS("Exiting %s.\n", __func__); + return count; +} + +static const struct drm_connector_helper_funcs +via_dac_connector_helper_funcs = { + .mode_valid = via_dac_mode_valid, + .get_modes = via_dac_get_modes, +}; + +void via_dac_probe(struct drm_device *dev) +{ + struct via_drm_priv *dev_priv = to_via_drm_priv(dev); + struct pci_dev *pdev = to_pci_dev(dev->dev); + u16 chipset = pdev->device; + u8 sr13, sr5a; + + DRM_DEBUG_KMS("Entered %s.\n", __func__); + + switch (chipset) { + case PCI_DEVICE_ID_VIA_VT3157: + case PCI_DEVICE_ID_VIA_VT1122: + case PCI_DEVICE_ID_VIA_VX875: + case PCI_DEVICE_ID_VIA_VX900_VGA: + sr5a = vga_rseq(VGABASE, 0x5a); + DRM_DEBUG_KMS("SR5A: 0x%02x\n", sr5a); + + /* Setting SR5A[0] to 1. + * This allows the reading out the alternative + * pin strapping information from SR12 and SR13. */ + svga_wseq_mask(VGABASE, 0x5a, BIT(0), BIT(0)); + DRM_DEBUG_KMS("SR5A: 0x%02x\n", sr5a); + + sr13 = vga_rseq(VGABASE, 0x13); + DRM_DEBUG_KMS("SR13: 0x%02x\n", sr13); + + if (!(sr13 & BIT(2))) { + dev_priv->dac_presence = true; + DRM_DEBUG_KMS("Detected the presence of VGA.\n"); + } else { + dev_priv->dac_presence = false; + } + + /* Restore SR5A. */ + vga_wseq(VGABASE, 0x5a, sr5a); + break; + default: + dev_priv->dac_presence = true; + DRM_DEBUG_KMS("Detected the presence of VGA.\n"); + break; + } + + dev_priv->dac_i2c_bus = VIA_I2C_NONE; + + if (dev_priv->dac_presence) { + dev_priv->dac_i2c_bus = VIA_I2C_BUS2 | VIA_I2C_BUS1; + } + + dev_priv->mapped_i2c_bus |= dev_priv->dac_i2c_bus; + + DRM_DEBUG_KMS("Exiting %s.\n", __func__); +} + +void via_dac_init(struct drm_device *dev) +{ + struct via_connector *con; + struct via_encoder *enc; + struct via_drm_priv *dev_priv = to_via_drm_priv(dev); + + enc = kzalloc(sizeof(*enc) + sizeof(*con), GFP_KERNEL); + if (!enc) { + DRM_ERROR("Failed to allocate connector and encoder\n"); + return; + } + con = &enc->cons[0]; + INIT_LIST_HEAD(&con->props); + + /* Piece together our connector */ + drm_connector_init(dev, &con->base, &via_dac_connector_funcs, + DRM_MODE_CONNECTOR_VGA); + drm_connector_helper_add(&con->base, &via_dac_connector_helper_funcs); + drm_connector_register(&con->base); + + con->i2c_bus = dev_priv->dac_i2c_bus; + con->base.doublescan_allowed = false; + con->base.interlace_allowed = true; + + /* Setup the encoders and attach them */ + drm_encoder_init(dev, &enc->base, &via_dac_enc_funcs, + DRM_MODE_ENCODER_DAC, NULL); + drm_encoder_helper_add(&enc->base, &via_dac_enc_helper_funcs); + + enc->base.possible_crtcs = BIT(1) | BIT(0); + enc->base.possible_clones = 0; + enc->di_port = VIA_DI_PORT_NONE; + + drm_connector_attach_encoder(&con->base, &enc->base); +}