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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
5 *
6 */
7#include <linux/io.h>
8#include <linux/iommu.h>
9#include <linux/of.h>
10#include <linux/of_graph.h>
11#include <linux/of_reserved_mem.h>
12#include <linux/platform_device.h>
13#include <linux/pm_runtime.h>
14#include <linux/dma-mapping.h>
15#include <linux/debugfs.h>
16#include <linux/seq_file.h>
17
18#include <drm/drm_print.h>
19
20#include "komeda_dev.h"
21
22static int komeda_register_show(struct seq_file *sf, void *x)
23{
24 struct komeda_dev *mdev = sf->private;
25 int i;
26
27 seq_puts(sf, "\n====== Komeda register dump =========\n");
28
29 pm_runtime_get_sync(mdev->dev);
30
31 if (mdev->funcs->dump_register)
32 mdev->funcs->dump_register(mdev, sf);
33
34 for (i = 0; i < mdev->n_pipelines; i++)
35 komeda_pipeline_dump_register(mdev->pipelines[i], sf);
36
37 pm_runtime_put(mdev->dev);
38
39 return 0;
40}
41
42DEFINE_SHOW_ATTRIBUTE(komeda_register);
43
44static void komeda_debugfs_init(struct komeda_dev *mdev)
45{
46 if (!debugfs_initialized())
47 return;
48
49 mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
50 debugfs_create_file("register", 0444, mdev->debugfs_root,
51 mdev, &komeda_register_fops);
52 debugfs_create_x16("err_verbosity", 0664, mdev->debugfs_root,
53 &mdev->err_verbosity);
54}
55
56static ssize_t
57core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
58{
59 struct komeda_dev *mdev = dev_to_mdev(dev);
60
61 return sysfs_emit(buf, "0x%08x\n", mdev->chip.core_id);
62}
63static DEVICE_ATTR_RO(core_id);
64
65static ssize_t
66config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
67{
68 struct komeda_dev *mdev = dev_to_mdev(dev);
69 struct komeda_pipeline *pipe = mdev->pipelines[0];
70 union komeda_config_id config_id;
71 int i;
72
73 memset(&config_id, 0, sizeof(config_id));
74
75 config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
76 config_id.n_pipelines = mdev->n_pipelines;
77 config_id.n_scalers = pipe->n_scalers;
78 config_id.n_layers = pipe->n_layers;
79 config_id.n_richs = 0;
80 for (i = 0; i < pipe->n_layers; i++) {
81 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
82 config_id.n_richs++;
83 }
84 return sysfs_emit(buf, "0x%08x\n", config_id.value);
85}
86static DEVICE_ATTR_RO(config_id);
87
88static ssize_t
89aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf)
90{
91 struct komeda_dev *mdev = dev_to_mdev(dev);
92
93 return sysfs_emit(buf, "%lu\n", clk_get_rate(mdev->aclk));
94}
95static DEVICE_ATTR_RO(aclk_hz);
96
97static struct attribute *komeda_sysfs_entries[] = {
98 &dev_attr_core_id.attr,
99 &dev_attr_config_id.attr,
100 &dev_attr_aclk_hz.attr,
101 NULL,
102};
103
104static struct attribute_group komeda_sysfs_attr_group = {
105 .attrs = komeda_sysfs_entries,
106};
107
108static int komeda_parse_pipe_dt(struct komeda_pipeline *pipe)
109{
110 struct device_node *np = pipe->of_node;
111 struct clk *clk;
112
113 clk = of_clk_get_by_name(np, "pxclk");
114 if (IS_ERR(clk)) {
115 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe->id);
116 return PTR_ERR(clk);
117 }
118 pipe->pxlclk = clk;
119
120 /* enum ports */
121 pipe->of_output_links[0] =
122 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
123 pipe->of_output_links[1] =
124 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1);
125 pipe->of_output_port =
126 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
127
128 pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1];
129
130 return 0;
131}
132
133static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
134{
135 struct platform_device *pdev = to_platform_device(dev);
136 struct device_node *child, *np = dev->of_node;
137 struct komeda_pipeline *pipe;
138 u32 pipe_id = U32_MAX;
139 int ret = -1;
140
141 mdev->irq = platform_get_irq(pdev, 0);
142 if (mdev->irq < 0) {
143 DRM_ERROR("could not get IRQ number.\n");
144 return mdev->irq;
145 }
146
147 /* Get the optional framebuffer memory resource */
148 ret = of_reserved_mem_device_init(dev);
149 if (ret && ret != -ENODEV)
150 return ret;
151
152 for_each_available_child_of_node(np, child) {
153 if (of_node_name_eq(child, "pipeline")) {
154 of_property_read_u32(child, "reg", &pipe_id);
155 if (pipe_id >= mdev->n_pipelines) {
156 DRM_WARN("Skip the redundant DT node: pipeline-%u.\n",
157 pipe_id);
158 continue;
159 }
160 mdev->pipelines[pipe_id]->of_node = of_node_get(child);
161 }
162 }
163
164 for (pipe_id = 0; pipe_id < mdev->n_pipelines; pipe_id++) {
165 pipe = mdev->pipelines[pipe_id];
166
167 if (!pipe->of_node) {
168 DRM_ERROR("Pipeline-%d doesn't have a DT node.\n",
169 pipe->id);
170 return -EINVAL;
171 }
172 ret = komeda_parse_pipe_dt(pipe);
173 if (ret)
174 return ret;
175 }
176
177 return 0;
178}
179
180struct komeda_dev *komeda_dev_create(struct device *dev)
181{
182 struct platform_device *pdev = to_platform_device(dev);
183 komeda_identify_func komeda_identify;
184 struct komeda_dev *mdev;
185 int err = 0;
186
187 komeda_identify = of_device_get_match_data(dev);
188 if (!komeda_identify)
189 return ERR_PTR(-ENODEV);
190
191 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
192 if (!mdev)
193 return ERR_PTR(-ENOMEM);
194
195 mutex_init(&mdev->lock);
196
197 mdev->dev = dev;
198 mdev->reg_base = devm_platform_ioremap_resource(pdev, 0);
199 if (IS_ERR(mdev->reg_base)) {
200 DRM_ERROR("Map register space failed.\n");
201 err = PTR_ERR(mdev->reg_base);
202 mdev->reg_base = NULL;
203 goto err_cleanup;
204 }
205
206 mdev->aclk = devm_clk_get(dev, "aclk");
207 if (IS_ERR(mdev->aclk)) {
208 DRM_ERROR("Get engine clk failed.\n");
209 err = PTR_ERR(mdev->aclk);
210 mdev->aclk = NULL;
211 goto err_cleanup;
212 }
213
214 clk_prepare_enable(mdev->aclk);
215
216 mdev->funcs = komeda_identify(mdev->reg_base, &mdev->chip);
217 if (!mdev->funcs) {
218 DRM_ERROR("Failed to identify the HW.\n");
219 err = -ENODEV;
220 goto disable_clk;
221 }
222
223 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",
224 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),
225 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
226 MALIDP_CORE_ID_MINOR(mdev->chip.core_id));
227
228 mdev->funcs->init_format_table(mdev);
229
230 err = mdev->funcs->enum_resources(mdev);
231 if (err) {
232 DRM_ERROR("enumerate display resource failed.\n");
233 goto disable_clk;
234 }
235
236 err = komeda_parse_dt(dev, mdev);
237 if (err) {
238 DRM_ERROR("parse device tree failed.\n");
239 goto disable_clk;
240 }
241
242 err = komeda_assemble_pipelines(mdev);
243 if (err) {
244 DRM_ERROR("assemble display pipelines failed.\n");
245 goto disable_clk;
246 }
247
248 dma_set_max_seg_size(dev, U32_MAX);
249
250 mdev->iommu = iommu_get_domain_for_dev(mdev->dev);
251 if (!mdev->iommu)
252 DRM_INFO("continue without IOMMU support!\n");
253
254 clk_disable_unprepare(mdev->aclk);
255
256 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
257 if (err) {
258 DRM_ERROR("create sysfs group failed.\n");
259 goto err_cleanup;
260 }
261
262 mdev->err_verbosity = KOMEDA_DEV_PRINT_ERR_EVENTS;
263
264 komeda_debugfs_init(mdev);
265
266 return mdev;
267
268disable_clk:
269 clk_disable_unprepare(mdev->aclk);
270err_cleanup:
271 komeda_dev_destroy(mdev);
272 return ERR_PTR(err);
273}
274
275void komeda_dev_destroy(struct komeda_dev *mdev)
276{
277 struct device *dev = mdev->dev;
278 const struct komeda_dev_funcs *funcs = mdev->funcs;
279 int i;
280
281 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);
282
283 debugfs_remove_recursive(mdev->debugfs_root);
284
285 if (mdev->aclk)
286 clk_prepare_enable(mdev->aclk);
287
288 for (i = 0; i < mdev->n_pipelines; i++) {
289 komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
290 mdev->pipelines[i] = NULL;
291 }
292
293 mdev->n_pipelines = 0;
294
295 of_reserved_mem_device_release(dev);
296
297 if (funcs && funcs->cleanup)
298 funcs->cleanup(mdev);
299
300 if (mdev->reg_base) {
301 devm_iounmap(dev, mdev->reg_base);
302 mdev->reg_base = NULL;
303 }
304
305 if (mdev->aclk) {
306 clk_disable_unprepare(mdev->aclk);
307 devm_clk_put(dev, mdev->aclk);
308 mdev->aclk = NULL;
309 }
310
311 devm_kfree(dev, mdev);
312}
313
314int komeda_dev_resume(struct komeda_dev *mdev)
315{
316 clk_prepare_enable(mdev->aclk);
317
318 mdev->funcs->enable_irq(mdev);
319
320 if (mdev->iommu && mdev->funcs->connect_iommu)
321 if (mdev->funcs->connect_iommu(mdev))
322 DRM_ERROR("connect iommu failed.\n");
323
324 return 0;
325}
326
327int komeda_dev_suspend(struct komeda_dev *mdev)
328{
329 if (mdev->iommu && mdev->funcs->disconnect_iommu)
330 if (mdev->funcs->disconnect_iommu(mdev))
331 DRM_ERROR("disconnect iommu failed.\n");
332
333 mdev->funcs->disable_irq(mdev);
334
335 clk_disable_unprepare(mdev->aclk);
336
337 return 0;
338}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
5 *
6 */
7#include <linux/io.h>
8#include <linux/iommu.h>
9#include <linux/of_device.h>
10#include <linux/of_graph.h>
11#include <linux/of_reserved_mem.h>
12#include <linux/platform_device.h>
13#include <linux/dma-mapping.h>
14#ifdef CONFIG_DEBUG_FS
15#include <linux/debugfs.h>
16#include <linux/seq_file.h>
17#endif
18
19#include <drm/drm_print.h>
20
21#include "komeda_dev.h"
22
23static int komeda_register_show(struct seq_file *sf, void *x)
24{
25 struct komeda_dev *mdev = sf->private;
26 int i;
27
28 if (mdev->funcs->dump_register)
29 mdev->funcs->dump_register(mdev, sf);
30
31 for (i = 0; i < mdev->n_pipelines; i++)
32 komeda_pipeline_dump_register(mdev->pipelines[i], sf);
33
34 return 0;
35}
36
37static int komeda_register_open(struct inode *inode, struct file *filp)
38{
39 return single_open(filp, komeda_register_show, inode->i_private);
40}
41
42static const struct file_operations komeda_register_fops = {
43 .owner = THIS_MODULE,
44 .open = komeda_register_open,
45 .read = seq_read,
46 .llseek = seq_lseek,
47 .release = single_release,
48};
49
50#ifdef CONFIG_DEBUG_FS
51static void komeda_debugfs_init(struct komeda_dev *mdev)
52{
53 if (!debugfs_initialized())
54 return;
55
56 mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
57 debugfs_create_file("register", 0444, mdev->debugfs_root,
58 mdev, &komeda_register_fops);
59}
60#endif
61
62static ssize_t
63core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
64{
65 struct komeda_dev *mdev = dev_to_mdev(dev);
66
67 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id);
68}
69static DEVICE_ATTR_RO(core_id);
70
71static ssize_t
72config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
73{
74 struct komeda_dev *mdev = dev_to_mdev(dev);
75 struct komeda_pipeline *pipe = mdev->pipelines[0];
76 union komeda_config_id config_id;
77 int i;
78
79 memset(&config_id, 0, sizeof(config_id));
80
81 config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
82 config_id.n_pipelines = mdev->n_pipelines;
83 config_id.n_scalers = pipe->n_scalers;
84 config_id.n_layers = pipe->n_layers;
85 config_id.n_richs = 0;
86 for (i = 0; i < pipe->n_layers; i++) {
87 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
88 config_id.n_richs++;
89 }
90 return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);
91}
92static DEVICE_ATTR_RO(config_id);
93
94static struct attribute *komeda_sysfs_entries[] = {
95 &dev_attr_core_id.attr,
96 &dev_attr_config_id.attr,
97 NULL,
98};
99
100static struct attribute_group komeda_sysfs_attr_group = {
101 .attrs = komeda_sysfs_entries,
102};
103
104static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
105{
106 struct komeda_pipeline *pipe;
107 struct clk *clk;
108 u32 pipe_id;
109 int ret = 0;
110
111 ret = of_property_read_u32(np, "reg", &pipe_id);
112 if (ret != 0 || pipe_id >= mdev->n_pipelines)
113 return -EINVAL;
114
115 pipe = mdev->pipelines[pipe_id];
116
117 clk = of_clk_get_by_name(np, "pxclk");
118 if (IS_ERR(clk)) {
119 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id);
120 return PTR_ERR(clk);
121 }
122 pipe->pxlclk = clk;
123
124 /* enum ports */
125 pipe->of_output_links[0] =
126 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
127 pipe->of_output_links[1] =
128 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1);
129 pipe->of_output_port =
130 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
131
132 pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1];
133 pipe->of_node = of_node_get(np);
134
135 return 0;
136}
137
138static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
139{
140 struct platform_device *pdev = to_platform_device(dev);
141 struct device_node *child, *np = dev->of_node;
142 int ret;
143
144 mdev->irq = platform_get_irq(pdev, 0);
145 if (mdev->irq < 0) {
146 DRM_ERROR("could not get IRQ number.\n");
147 return mdev->irq;
148 }
149
150 /* Get the optional framebuffer memory resource */
151 ret = of_reserved_mem_device_init(dev);
152 if (ret && ret != -ENODEV)
153 return ret;
154 ret = 0;
155
156 for_each_available_child_of_node(np, child) {
157 if (of_node_cmp(child->name, "pipeline") == 0) {
158 ret = komeda_parse_pipe_dt(mdev, child);
159 if (ret) {
160 DRM_ERROR("parse pipeline dt error!\n");
161 of_node_put(child);
162 break;
163 }
164 }
165 }
166
167 return ret;
168}
169
170struct komeda_dev *komeda_dev_create(struct device *dev)
171{
172 struct platform_device *pdev = to_platform_device(dev);
173 const struct komeda_product_data *product;
174 struct komeda_dev *mdev;
175 struct resource *io_res;
176 int err = 0;
177
178 product = of_device_get_match_data(dev);
179 if (!product)
180 return ERR_PTR(-ENODEV);
181
182 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
183 if (!io_res) {
184 DRM_ERROR("No registers defined.\n");
185 return ERR_PTR(-ENODEV);
186 }
187
188 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
189 if (!mdev)
190 return ERR_PTR(-ENOMEM);
191
192 mutex_init(&mdev->lock);
193
194 mdev->dev = dev;
195 mdev->reg_base = devm_ioremap_resource(dev, io_res);
196 if (IS_ERR(mdev->reg_base)) {
197 DRM_ERROR("Map register space failed.\n");
198 err = PTR_ERR(mdev->reg_base);
199 mdev->reg_base = NULL;
200 goto err_cleanup;
201 }
202
203 mdev->aclk = devm_clk_get(dev, "aclk");
204 if (IS_ERR(mdev->aclk)) {
205 DRM_ERROR("Get engine clk failed.\n");
206 err = PTR_ERR(mdev->aclk);
207 mdev->aclk = NULL;
208 goto err_cleanup;
209 }
210
211 clk_prepare_enable(mdev->aclk);
212
213 mdev->funcs = product->identify(mdev->reg_base, &mdev->chip);
214 if (!komeda_product_match(mdev, product->product_id)) {
215 DRM_ERROR("DT configured %x mismatch with real HW %x.\n",
216 product->product_id,
217 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id));
218 err = -ENODEV;
219 goto err_cleanup;
220 }
221
222 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",
223 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),
224 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
225 MALIDP_CORE_ID_MINOR(mdev->chip.core_id));
226
227 mdev->funcs->init_format_table(mdev);
228
229 err = mdev->funcs->enum_resources(mdev);
230 if (err) {
231 DRM_ERROR("enumerate display resource failed.\n");
232 goto err_cleanup;
233 }
234
235 err = komeda_parse_dt(dev, mdev);
236 if (err) {
237 DRM_ERROR("parse device tree failed.\n");
238 goto err_cleanup;
239 }
240
241 err = komeda_assemble_pipelines(mdev);
242 if (err) {
243 DRM_ERROR("assemble display pipelines failed.\n");
244 goto err_cleanup;
245 }
246
247 dev->dma_parms = &mdev->dma_parms;
248 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
249
250 mdev->iommu = iommu_get_domain_for_dev(mdev->dev);
251 if (!mdev->iommu)
252 DRM_INFO("continue without IOMMU support!\n");
253
254 if (mdev->iommu && mdev->funcs->connect_iommu) {
255 err = mdev->funcs->connect_iommu(mdev);
256 if (err) {
257 mdev->iommu = NULL;
258 goto err_cleanup;
259 }
260 }
261
262 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
263 if (err) {
264 DRM_ERROR("create sysfs group failed.\n");
265 goto err_cleanup;
266 }
267
268#ifdef CONFIG_DEBUG_FS
269 komeda_debugfs_init(mdev);
270#endif
271
272 return mdev;
273
274err_cleanup:
275 komeda_dev_destroy(mdev);
276 return ERR_PTR(err);
277}
278
279void komeda_dev_destroy(struct komeda_dev *mdev)
280{
281 struct device *dev = mdev->dev;
282 const struct komeda_dev_funcs *funcs = mdev->funcs;
283 int i;
284
285 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);
286
287#ifdef CONFIG_DEBUG_FS
288 debugfs_remove_recursive(mdev->debugfs_root);
289#endif
290
291 if (mdev->iommu && mdev->funcs->disconnect_iommu)
292 mdev->funcs->disconnect_iommu(mdev);
293 mdev->iommu = NULL;
294
295 for (i = 0; i < mdev->n_pipelines; i++) {
296 komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
297 mdev->pipelines[i] = NULL;
298 }
299
300 mdev->n_pipelines = 0;
301
302 of_reserved_mem_device_release(dev);
303
304 if (funcs && funcs->cleanup)
305 funcs->cleanup(mdev);
306
307 if (mdev->reg_base) {
308 devm_iounmap(dev, mdev->reg_base);
309 mdev->reg_base = NULL;
310 }
311
312 if (mdev->aclk) {
313 clk_disable_unprepare(mdev->aclk);
314 devm_clk_put(dev, mdev->aclk);
315 mdev->aclk = NULL;
316 }
317
318 devm_kfree(dev, mdev);
319}