From: Kevin Brace <kevinbrace@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Kevin Brace <kevinbrace@xxxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/via/via_dac.c | 504 ++++++++++++++++++++++++++++++++++ 1 file changed, 504 insertions(+) create mode 100644 drivers/gpu/drm/via/via_dac.c 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 <kevinbrace@xxxxxxxxxxxxxxxxxxxx> + * James Simmons <jsimmons@xxxxxxxxxxxxx> + */ + +#include <linux/pci.h> + +#include <drm/drm_atomic_state_helper.h> +#include <drm/drm_probe_helper.h> + +#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); +} -- 2.35.1