1// SPDX-License-Identifier: GPL-2.0-only
2/**************************************************************************
3 * Copyright (c) 2007-2011, Intel Corporation.
4 * All Rights Reserved.
5 *
6 **************************************************************************/
7
8#include <drm/drm_framebuffer.h>
9#include <drm/drm_gem_framebuffer_helper.h>
10#include <drm/drm_modeset_helper.h>
11
12#include "framebuffer.h"
13#include "psb_drv.h"
14
15static const struct drm_framebuffer_funcs psb_fb_funcs = {
16 .destroy = drm_gem_fb_destroy,
17 .create_handle = drm_gem_fb_create_handle,
18};
19
20/**
21 * psb_framebuffer_init - initialize a framebuffer
22 * @dev: our DRM device
23 * @fb: framebuffer to set up
24 * @mode_cmd: mode description
25 * @obj: backing object
26 *
27 * Configure and fill in the boilerplate for our frame buffer. Return
28 * 0 on success or an error code if we fail.
29 */
30static int psb_framebuffer_init(struct drm_device *dev,
31 struct drm_framebuffer *fb,
32 const struct drm_mode_fb_cmd2 *mode_cmd,
33 struct drm_gem_object *obj)
34{
35 const struct drm_format_info *info;
36 int ret;
37
38 /*
39 * Reject unknown formats, YUV formats, and formats with more than
40 * 4 bytes per pixel.
41 */
42 info = drm_get_format_info(dev, mode_cmd);
43 if (!info || !info->depth || info->cpp[0] > 4)
44 return -EINVAL;
45
46 if (mode_cmd->pitches[0] & 63)
47 return -EINVAL;
48
49 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
50 fb->obj[0] = obj;
51 ret = drm_framebuffer_init(dev, fb, funcs: &psb_fb_funcs);
52 if (ret) {
53 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
54 return ret;
55 }
56 return 0;
57}
58
59/**
60 * psb_framebuffer_create - create a framebuffer backed by gt
61 * @dev: our DRM device
62 * @mode_cmd: the description of the requested mode
63 * @obj: the backing object
64 *
65 * Create a framebuffer object backed by the gt, and fill in the
66 * boilerplate required
67 *
68 * TODO: review object references
69 */
70struct drm_framebuffer *psb_framebuffer_create(struct drm_device *dev,
71 const struct drm_mode_fb_cmd2 *mode_cmd,
72 struct drm_gem_object *obj)
73{
74 struct drm_framebuffer *fb;
75 int ret;
76
77 fb = kzalloc(size: sizeof(*fb), GFP_KERNEL);
78 if (!fb)
79 return ERR_PTR(error: -ENOMEM);
80
81 ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
82 if (ret) {
83 kfree(objp: fb);
84 return ERR_PTR(error: ret);
85 }
86 return fb;
87}
88
89/**
90 * psb_user_framebuffer_create - create framebuffer
91 * @dev: our DRM device
92 * @filp: client file
93 * @cmd: mode request
94 *
95 * Create a new framebuffer backed by a userspace GEM object
96 */
97static struct drm_framebuffer *psb_user_framebuffer_create
98 (struct drm_device *dev, struct drm_file *filp,
99 const struct drm_mode_fb_cmd2 *cmd)
100{
101 struct drm_gem_object *obj;
102 struct drm_framebuffer *fb;
103
104 /*
105 * Find the GEM object and thus the gtt range object that is
106 * to back this space
107 */
108 obj = drm_gem_object_lookup(filp, handle: cmd->handles[0]);
109 if (obj == NULL)
110 return ERR_PTR(error: -ENOENT);
111
112 /* Let the core code do all the work */
113 fb = psb_framebuffer_create(dev, mode_cmd: cmd, obj);
114 if (IS_ERR(ptr: fb))
115 drm_gem_object_put(obj);
116
117 return fb;
118}
119
120static const struct drm_mode_config_funcs psb_mode_funcs = {
121 .fb_create = psb_user_framebuffer_create,
122};
123
124static void psb_setup_outputs(struct drm_device *dev)
125{
126 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
127 struct drm_connector_list_iter conn_iter;
128 struct drm_connector *connector;
129
130 drm_mode_create_scaling_mode_property(dev);
131
132 /* It is ok for this to fail - we just don't get backlight control */
133 if (!dev_priv->backlight_property)
134 dev_priv->backlight_property = drm_property_create_range(dev, flags: 0,
135 name: "backlight", min: 0, max: 100);
136 dev_priv->ops->output_init(dev);
137
138 drm_connector_list_iter_begin(dev, iter: &conn_iter);
139 drm_for_each_connector_iter(connector, &conn_iter) {
140 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
141 struct drm_encoder *encoder = &gma_encoder->base;
142 int crtc_mask = 0, clone_mask = 0;
143
144 /* valid crtcs */
145 switch (gma_encoder->type) {
146 case INTEL_OUTPUT_ANALOG:
147 crtc_mask = (1 << 0);
148 clone_mask = (1 << INTEL_OUTPUT_ANALOG);
149 break;
150 case INTEL_OUTPUT_SDVO:
151 crtc_mask = dev_priv->ops->sdvo_mask;
152 clone_mask = 0;
153 break;
154 case INTEL_OUTPUT_LVDS:
155 crtc_mask = dev_priv->ops->lvds_mask;
156 clone_mask = 0;
157 break;
158 case INTEL_OUTPUT_MIPI:
159 crtc_mask = (1 << 0);
160 clone_mask = 0;
161 break;
162 case INTEL_OUTPUT_MIPI2:
163 crtc_mask = (1 << 2);
164 clone_mask = 0;
165 break;
166 case INTEL_OUTPUT_HDMI:
167 crtc_mask = dev_priv->ops->hdmi_mask;
168 clone_mask = (1 << INTEL_OUTPUT_HDMI);
169 break;
170 case INTEL_OUTPUT_DISPLAYPORT:
171 crtc_mask = (1 << 0) | (1 << 1);
172 clone_mask = 0;
173 break;
174 case INTEL_OUTPUT_EDP:
175 crtc_mask = (1 << 1);
176 clone_mask = 0;
177 }
178 encoder->possible_crtcs = crtc_mask;
179 encoder->possible_clones =
180 gma_connector_clones(dev, type_mask: clone_mask);
181 }
182 drm_connector_list_iter_end(iter: &conn_iter);
183}
184
185void psb_modeset_init(struct drm_device *dev)
186{
187 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
188 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
189 int i;
190
191 if (drmm_mode_config_init(dev))
192 return;
193
194 dev->mode_config.min_width = 0;
195 dev->mode_config.min_height = 0;
196
197 dev->mode_config.funcs = &psb_mode_funcs;
198
199 /* num pipes is 2 for PSB but 1 for Mrst */
200 for (i = 0; i < dev_priv->num_pipe; i++)
201 psb_intel_crtc_init(dev, pipe: i, mode_dev);
202
203 dev->mode_config.max_width = 4096;
204 dev->mode_config.max_height = 4096;
205
206 psb_setup_outputs(dev);
207
208 if (dev_priv->ops->errata)
209 dev_priv->ops->errata(dev);
210
211 dev_priv->modeset = true;
212}
213
214void psb_modeset_cleanup(struct drm_device *dev)
215{
216 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
217 if (dev_priv->modeset) {
218 drm_kms_helper_poll_fini(dev);
219 }
220}
221

source code of linux/drivers/gpu/drm/gma500/framebuffer.c