| /* -*- mode: c; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ |
| /* vi: set ts=8 sw=8 sts=8: */ |
| /*************************************************************************/ /*! |
| @File |
| @Codingstyle LinuxKernel |
| @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved |
| @License Dual MIT/GPLv2 |
| |
| The contents of this file are subject to the MIT license as set out below. |
| |
| 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 shall be included in |
| all copies or substantial portions of the Software. |
| |
| Alternatively, the contents of this file may be used under the terms of |
| the GNU General Public License Version 2 ("GPL") in which case the provisions |
| of GPL are applicable instead of those above. |
| |
| If you wish to allow use of your version of this file only under the terms of |
| GPL, and not to allow others to use your version of this file under the terms |
| of the MIT license, indicate your decision by deleting the provisions above |
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| out in the file called "GPL-COPYING" included in this distribution. If you do |
| not delete the provisions above, a recipient may use your version of this file |
| under the terms of either the MIT license or GPL. |
| |
| This License is also included in this distribution in the file called |
| "MIT-COPYING". |
| |
| EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) 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; AND (B) IN NO EVENT SHALL THE AUTHORS OR |
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| CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ /**************************************************************************/ |
| |
| #include "drm_pdp_drv.h" |
| |
| #include <linux/moduleparam.h> |
| #include <linux/version.h> |
| |
| #include <drm/drmP.h> |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_crtc_helper.h> |
| |
| #if defined(PDP_USE_ATOMIC) |
| #include <drm/drm_atomic_helper.h> |
| #endif |
| |
| #include "kernel_compatibility.h" |
| |
| struct pdp_mode_data { |
| int hdisplay; |
| int vdisplay; |
| int vrefresh; |
| bool reduced_blanking; |
| bool interlaced; |
| bool margins; |
| }; |
| |
| static const struct pdp_mode_data pdp_extra_modes[] = { |
| #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)) |
| { |
| .hdisplay = 1280, |
| .vdisplay = 720, |
| .vrefresh = 60, |
| .reduced_blanking = false, |
| .interlaced = false, |
| .margins = false, |
| }, |
| { |
| .hdisplay = 1920, |
| .vdisplay = 1080, |
| .vrefresh = 60, |
| .reduced_blanking = false, |
| .interlaced = false, |
| .margins = false, |
| }, |
| #endif |
| }; |
| |
| static char preferred_mode_name[DRM_DISPLAY_MODE_LEN] = "\0"; |
| |
| module_param_string(dvi_preferred_mode, |
| preferred_mode_name, |
| DRM_DISPLAY_MODE_LEN, |
| 0444); |
| |
| MODULE_PARM_DESC(dvi_preferred_mode, |
| "Specify the preferred mode (if supported), e.g. 1280x1024."); |
| |
| |
| static int pdp_dvi_add_extra_modes(struct drm_connector *connector) |
| { |
| struct drm_display_mode *mode; |
| int num_modes; |
| int i; |
| |
| for (i = 0, num_modes = 0; i < ARRAY_SIZE(pdp_extra_modes); i++) { |
| mode = drm_cvt_mode(connector->dev, |
| pdp_extra_modes[i].hdisplay, |
| pdp_extra_modes[i].vdisplay, |
| pdp_extra_modes[i].vrefresh, |
| pdp_extra_modes[i].reduced_blanking, |
| pdp_extra_modes[i].interlaced, |
| pdp_extra_modes[i].margins); |
| if (mode) { |
| drm_mode_probed_add(connector, mode); |
| num_modes++; |
| } |
| } |
| |
| return num_modes; |
| } |
| |
| static int pdp_dvi_connector_helper_get_modes(struct drm_connector *connector) |
| { |
| struct drm_device *dev = connector->dev; |
| int num_modes; |
| int len = strlen(preferred_mode_name); |
| |
| if (len) |
| dev_info(dev->dev, "detected dvi_preferred_mode=%s\n", |
| preferred_mode_name); |
| else |
| dev_info(dev->dev, "no dvi_preferred_mode\n"); |
| |
| num_modes = drm_add_modes_noedid(connector, |
| dev->mode_config.max_width, |
| dev->mode_config.max_height); |
| |
| num_modes += pdp_dvi_add_extra_modes(connector); |
| if (num_modes) { |
| struct drm_display_mode *pref_mode = NULL; |
| |
| if (len) { |
| struct drm_display_mode *mode; |
| struct list_head *entry; |
| |
| list_for_each(entry, &connector->probed_modes) { |
| mode = list_entry(entry, |
| struct drm_display_mode, |
| head); |
| if (!strcmp(mode->name, preferred_mode_name)) { |
| pref_mode = mode; |
| break; |
| } |
| } |
| } |
| |
| if (pref_mode) |
| pref_mode->type |= DRM_MODE_TYPE_PREFERRED; |
| else |
| drm_set_preferred_mode(connector, |
| dev->mode_config.max_width, |
| dev->mode_config.max_height); |
| } |
| |
| drm_mode_sort(&connector->probed_modes); |
| |
| DRM_DEBUG_DRIVER("[CONNECTOR:%d:%s] found %d modes\n", |
| connector->base.id, |
| connector->name, |
| num_modes); |
| |
| return num_modes; |
| } |
| |
| static int pdp_dvi_connector_helper_mode_valid(struct drm_connector *connector, |
| struct drm_display_mode *mode) |
| { |
| if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
| return MODE_NO_INTERLACE; |
| else if (mode->flags & DRM_MODE_FLAG_DBLSCAN) |
| return MODE_NO_DBLESCAN; |
| |
| return MODE_OK; |
| } |
| |
| #if !defined(PDP_USE_ATOMIC) |
| static struct drm_encoder * |
| pdp_dvi_connector_helper_best_encoder(struct drm_connector *connector) |
| { |
| /* Pick the first encoder we find */ |
| if (connector->encoder_ids[0] != 0) { |
| struct drm_encoder *encoder; |
| |
| encoder = drm_encoder_find(connector->dev, |
| NULL, |
| connector->encoder_ids[0]); |
| if (encoder) { |
| DRM_DEBUG_DRIVER("[ENCODER:%d:%s] best for " |
| "[CONNECTOR:%d:%s]\n", |
| encoder->base.id, |
| encoder->name, |
| connector->base.id, |
| connector->name); |
| return encoder; |
| } |
| } |
| |
| return NULL; |
| } |
| #endif |
| |
| #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)) |
| static enum drm_connector_status |
| pdp_dvi_connector_detect(struct drm_connector *connector, |
| bool force) |
| { |
| /* |
| * It appears that there is no way to determine if a monitor |
| * is connected. This needs to be set to connected otherwise |
| * DPMS never gets set to ON. |
| */ |
| return connector_status_connected; |
| } |
| #endif |
| |
| static void pdp_dvi_connector_destroy(struct drm_connector *connector) |
| { |
| struct pdp_drm_private *dev_priv = connector->dev->dev_private; |
| |
| DRM_DEBUG_DRIVER("[CONNECTOR:%d:%s]\n", |
| connector->base.id, |
| connector->name); |
| |
| drm_connector_cleanup(connector); |
| |
| kfree(connector); |
| dev_priv->connector = NULL; |
| } |
| |
| static void pdp_dvi_connector_force(struct drm_connector *connector) |
| { |
| } |
| |
| static struct drm_connector_helper_funcs pdp_dvi_connector_helper_funcs = { |
| .get_modes = pdp_dvi_connector_helper_get_modes, |
| .mode_valid = pdp_dvi_connector_helper_mode_valid, |
| /* |
| * For atomic, don't set atomic_best_encoder or best_encoder. This will |
| * cause the DRM core to fallback to drm_atomic_helper_best_encoder(). |
| * This is fine as we only have a single connector and encoder. |
| */ |
| #if !defined(PDP_USE_ATOMIC) |
| .best_encoder = pdp_dvi_connector_helper_best_encoder, |
| #endif |
| }; |
| |
| static const struct drm_connector_funcs pdp_dvi_connector_funcs = { |
| #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)) |
| .detect = pdp_dvi_connector_detect, |
| #endif |
| .fill_modes = drm_helper_probe_single_connector_modes, |
| .destroy = pdp_dvi_connector_destroy, |
| .force = pdp_dvi_connector_force, |
| #if defined(PDP_USE_ATOMIC) |
| .reset = drm_atomic_helper_connector_reset, |
| .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, |
| .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, |
| #else |
| .dpms = drm_helper_connector_dpms, |
| #endif |
| }; |
| |
| |
| struct drm_connector * |
| pdp_dvi_connector_create(struct drm_device *dev) |
| { |
| struct drm_connector *connector; |
| |
| connector = kzalloc(sizeof(*connector), GFP_KERNEL); |
| if (!connector) |
| return ERR_PTR(-ENOMEM); |
| |
| drm_connector_init(dev, |
| connector, |
| &pdp_dvi_connector_funcs, |
| DRM_MODE_CONNECTOR_DVID); |
| drm_connector_helper_add(connector, &pdp_dvi_connector_helper_funcs); |
| |
| connector->dpms = DRM_MODE_DPMS_OFF; |
| connector->interlace_allowed = false; |
| connector->doublescan_allowed = false; |
| connector->display_info.subpixel_order = SubPixelHorizontalRGB; |
| |
| DRM_DEBUG_DRIVER("[CONNECTOR:%d:%s]\n", |
| connector->base.id, |
| connector->name); |
| |
| return connector; |
| } |