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Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux...
[linux.git] / drivers / gpu / drm / msm / disp / dpu1 / dpu_vbif.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
3  */
4
5 #define pr_fmt(fmt)     "[drm:%s:%d] " fmt, __func__, __LINE__
6
7 #include <linux/debugfs.h>
8 #include <linux/delay.h>
9
10 #include "dpu_vbif.h"
11 #include "dpu_hw_vbif.h"
12 #include "dpu_trace.h"
13
14 static struct dpu_hw_vbif *dpu_get_vbif(struct dpu_kms *dpu_kms, enum dpu_vbif vbif_idx)
15 {
16         if (vbif_idx < ARRAY_SIZE(dpu_kms->hw_vbif))
17                 return dpu_kms->hw_vbif[vbif_idx];
18
19         return NULL;
20 }
21
22 static const char *dpu_vbif_name(enum dpu_vbif idx)
23 {
24         switch (idx) {
25         case VBIF_RT:
26                 return "VBIF_RT";
27         case VBIF_NRT:
28                 return "VBIF_NRT";
29         default:
30                 return "??";
31         }
32 }
33
34 /**
35  * _dpu_vbif_wait_for_xin_halt - wait for the xin to halt
36  * @vbif:       Pointer to hardware vbif driver
37  * @xin_id:     Client interface identifier
38  * @return:     0 if success; error code otherwise
39  */
40 static int _dpu_vbif_wait_for_xin_halt(struct dpu_hw_vbif *vbif, u32 xin_id)
41 {
42         ktime_t timeout;
43         bool status;
44         int rc;
45
46         if (!vbif || !vbif->cap || !vbif->ops.get_halt_ctrl) {
47                 DPU_ERROR("invalid arguments vbif %d\n", vbif != NULL);
48                 return -EINVAL;
49         }
50
51         timeout = ktime_add_us(ktime_get(), vbif->cap->xin_halt_timeout);
52         for (;;) {
53                 status = vbif->ops.get_halt_ctrl(vbif, xin_id);
54                 if (status)
55                         break;
56                 if (ktime_compare_safe(ktime_get(), timeout) > 0) {
57                         status = vbif->ops.get_halt_ctrl(vbif, xin_id);
58                         break;
59                 }
60                 usleep_range(501, 1000);
61         }
62
63         if (!status) {
64                 rc = -ETIMEDOUT;
65                 DPU_ERROR("%s client %d not halting. TIMEDOUT.\n",
66                                 dpu_vbif_name(vbif->idx), xin_id);
67         } else {
68                 rc = 0;
69                 DRM_DEBUG_ATOMIC("%s client %d is halted\n",
70                                 dpu_vbif_name(vbif->idx), xin_id);
71         }
72
73         return rc;
74 }
75
76 /**
77  * _dpu_vbif_apply_dynamic_ot_limit - determine OT based on usecase parameters
78  * @vbif:       Pointer to hardware vbif driver
79  * @ot_lim:     Pointer to OT limit to be modified
80  * @params:     Pointer to usecase parameters
81  */
82 static void _dpu_vbif_apply_dynamic_ot_limit(struct dpu_hw_vbif *vbif,
83                 u32 *ot_lim, struct dpu_vbif_set_ot_params *params)
84 {
85         u64 pps;
86         const struct dpu_vbif_dynamic_ot_tbl *tbl;
87         u32 i;
88
89         if (!vbif || !(vbif->cap->features & BIT(DPU_VBIF_QOS_OTLIM)))
90                 return;
91
92         /* Dynamic OT setting done only for WFD */
93         if (!params->is_wfd)
94                 return;
95
96         pps = params->frame_rate;
97         pps *= params->width;
98         pps *= params->height;
99
100         tbl = params->rd ? &vbif->cap->dynamic_ot_rd_tbl :
101                         &vbif->cap->dynamic_ot_wr_tbl;
102
103         for (i = 0; i < tbl->count; i++) {
104                 if (pps <= tbl->cfg[i].pps) {
105                         *ot_lim = tbl->cfg[i].ot_limit;
106                         break;
107                 }
108         }
109
110         DRM_DEBUG_ATOMIC("%s xin:%d w:%d h:%d fps:%d pps:%llu ot:%u\n",
111                         dpu_vbif_name(vbif->idx), params->xin_id,
112                         params->width, params->height, params->frame_rate,
113                         pps, *ot_lim);
114 }
115
116 /**
117  * _dpu_vbif_get_ot_limit - get OT based on usecase & configuration parameters
118  * @vbif:       Pointer to hardware vbif driver
119  * @params:     Pointer to usecase parameters
120  * @return:     OT limit
121  */
122 static u32 _dpu_vbif_get_ot_limit(struct dpu_hw_vbif *vbif,
123         struct dpu_vbif_set_ot_params *params)
124 {
125         u32 ot_lim = 0;
126         u32 val;
127
128         if (!vbif || !vbif->cap) {
129                 DPU_ERROR("invalid arguments vbif %d\n", vbif != NULL);
130                 return -EINVAL;
131         }
132
133         if (vbif->cap->default_ot_wr_limit && !params->rd)
134                 ot_lim = vbif->cap->default_ot_wr_limit;
135         else if (vbif->cap->default_ot_rd_limit && params->rd)
136                 ot_lim = vbif->cap->default_ot_rd_limit;
137
138         /*
139          * If default ot is not set from dt/catalog,
140          * then do not configure it.
141          */
142         if (ot_lim == 0)
143                 goto exit;
144
145         /* Modify the limits if the target and the use case requires it */
146         _dpu_vbif_apply_dynamic_ot_limit(vbif, &ot_lim, params);
147
148         if (vbif && vbif->ops.get_limit_conf) {
149                 val = vbif->ops.get_limit_conf(vbif,
150                                 params->xin_id, params->rd);
151                 if (val == ot_lim)
152                         ot_lim = 0;
153         }
154
155 exit:
156         DRM_DEBUG_ATOMIC("%s xin:%d ot_lim:%d\n",
157                         dpu_vbif_name(vbif->idx), params->xin_id, ot_lim);
158         return ot_lim;
159 }
160
161 /**
162  * dpu_vbif_set_ot_limit - set OT based on usecase & configuration parameters
163  * @dpu_kms:    DPU handler
164  * @params:     Pointer to usecase parameters
165  *
166  * Note this function would block waiting for bus halt.
167  */
168 void dpu_vbif_set_ot_limit(struct dpu_kms *dpu_kms,
169                 struct dpu_vbif_set_ot_params *params)
170 {
171         struct dpu_hw_vbif *vbif;
172         struct dpu_hw_mdp *mdp;
173         bool forced_on = false;
174         u32 ot_lim;
175         int ret;
176
177         mdp = dpu_kms->hw_mdp;
178
179         vbif = dpu_get_vbif(dpu_kms, params->vbif_idx);
180         if (!vbif || !mdp) {
181                 DRM_DEBUG_ATOMIC("invalid arguments vbif %d mdp %d\n",
182                                 vbif != NULL, mdp != NULL);
183                 return;
184         }
185
186         if (!mdp->ops.setup_clk_force_ctrl ||
187                         !vbif->ops.set_limit_conf ||
188                         !vbif->ops.set_halt_ctrl)
189                 return;
190
191         /* set write_gather_en for all write clients */
192         if (vbif->ops.set_write_gather_en && !params->rd)
193                 vbif->ops.set_write_gather_en(vbif, params->xin_id);
194
195         ot_lim = _dpu_vbif_get_ot_limit(vbif, params) & 0xFF;
196
197         if (ot_lim == 0)
198                 return;
199
200         trace_dpu_perf_set_ot(params->num, params->xin_id, ot_lim,
201                 params->vbif_idx);
202
203         forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, true);
204
205         vbif->ops.set_limit_conf(vbif, params->xin_id, params->rd, ot_lim);
206
207         vbif->ops.set_halt_ctrl(vbif, params->xin_id, true);
208
209         ret = _dpu_vbif_wait_for_xin_halt(vbif, params->xin_id);
210         if (ret)
211                 trace_dpu_vbif_wait_xin_halt_fail(vbif->idx, params->xin_id);
212
213         vbif->ops.set_halt_ctrl(vbif, params->xin_id, false);
214
215         if (forced_on)
216                 mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, false);
217 }
218
219 void dpu_vbif_set_qos_remap(struct dpu_kms *dpu_kms,
220                 struct dpu_vbif_set_qos_params *params)
221 {
222         struct dpu_hw_vbif *vbif;
223         struct dpu_hw_mdp *mdp;
224         bool forced_on = false;
225         const struct dpu_vbif_qos_tbl *qos_tbl;
226         int i;
227
228         if (!params || !dpu_kms->hw_mdp) {
229                 DPU_ERROR("invalid arguments\n");
230                 return;
231         }
232         mdp = dpu_kms->hw_mdp;
233
234         vbif = dpu_get_vbif(dpu_kms, params->vbif_idx);
235
236         if (!vbif || !vbif->cap) {
237                 DPU_ERROR("invalid vbif %d\n", params->vbif_idx);
238                 return;
239         }
240
241         if (!vbif->ops.set_qos_remap || !mdp->ops.setup_clk_force_ctrl) {
242                 DRM_DEBUG_ATOMIC("qos remap not supported\n");
243                 return;
244         }
245
246         qos_tbl = params->is_rt ? &vbif->cap->qos_rt_tbl :
247                         &vbif->cap->qos_nrt_tbl;
248
249         if (!qos_tbl->npriority_lvl || !qos_tbl->priority_lvl) {
250                 DRM_DEBUG_ATOMIC("qos tbl not defined\n");
251                 return;
252         }
253
254         forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, true);
255
256         for (i = 0; i < qos_tbl->npriority_lvl; i++) {
257                 DRM_DEBUG_ATOMIC("%s xin:%d lvl:%d/%d\n",
258                                 dpu_vbif_name(params->vbif_idx), params->xin_id, i,
259                                 qos_tbl->priority_lvl[i]);
260                 vbif->ops.set_qos_remap(vbif, params->xin_id, i,
261                                 qos_tbl->priority_lvl[i]);
262         }
263
264         if (forced_on)
265                 mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, false);
266 }
267
268 void dpu_vbif_clear_errors(struct dpu_kms *dpu_kms)
269 {
270         struct dpu_hw_vbif *vbif;
271         u32 i, pnd, src;
272
273         for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {
274                 vbif = dpu_kms->hw_vbif[i];
275                 if (vbif && vbif->ops.clear_errors) {
276                         vbif->ops.clear_errors(vbif, &pnd, &src);
277                         if (pnd || src) {
278                                 DRM_DEBUG_KMS("%s: pnd 0x%X, src 0x%X\n",
279                                               dpu_vbif_name(vbif->idx), pnd, src);
280                         }
281                 }
282         }
283 }
284
285 void dpu_vbif_init_memtypes(struct dpu_kms *dpu_kms)
286 {
287         struct dpu_hw_vbif *vbif;
288         int i, j;
289
290         for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {
291                 vbif = dpu_kms->hw_vbif[i];
292                 if (vbif && vbif->cap && vbif->ops.set_mem_type) {
293                         for (j = 0; j < vbif->cap->memtype_count; j++)
294                                 vbif->ops.set_mem_type(
295                                                 vbif, j, vbif->cap->memtype[j]);
296                 }
297         }
298 }
299
300 #ifdef CONFIG_DEBUG_FS
301
302 void dpu_debugfs_vbif_init(struct dpu_kms *dpu_kms, struct dentry *debugfs_root)
303 {
304         char vbif_name[32];
305         struct dentry *entry, *debugfs_vbif;
306         int i, j;
307
308         entry = debugfs_create_dir("vbif", debugfs_root);
309
310         for (i = 0; i < dpu_kms->catalog->vbif_count; i++) {
311                 const struct dpu_vbif_cfg *vbif = &dpu_kms->catalog->vbif[i];
312
313                 snprintf(vbif_name, sizeof(vbif_name), "%d", vbif->id);
314
315                 debugfs_vbif = debugfs_create_dir(vbif_name, entry);
316
317                 debugfs_create_u32("features", 0600, debugfs_vbif,
318                         (u32 *)&vbif->features);
319
320                 debugfs_create_u32("xin_halt_timeout", 0400, debugfs_vbif,
321                         (u32 *)&vbif->xin_halt_timeout);
322
323                 debugfs_create_u32("default_rd_ot_limit", 0400, debugfs_vbif,
324                         (u32 *)&vbif->default_ot_rd_limit);
325
326                 debugfs_create_u32("default_wr_ot_limit", 0400, debugfs_vbif,
327                         (u32 *)&vbif->default_ot_wr_limit);
328
329                 for (j = 0; j < vbif->dynamic_ot_rd_tbl.count; j++) {
330                         const struct dpu_vbif_dynamic_ot_cfg *cfg =
331                                         &vbif->dynamic_ot_rd_tbl.cfg[j];
332
333                         snprintf(vbif_name, sizeof(vbif_name),
334                                         "dynamic_ot_rd_%d_pps", j);
335                         debugfs_create_u64(vbif_name, 0400, debugfs_vbif,
336                                         (u64 *)&cfg->pps);
337                         snprintf(vbif_name, sizeof(vbif_name),
338                                         "dynamic_ot_rd_%d_ot_limit", j);
339                         debugfs_create_u32(vbif_name, 0400, debugfs_vbif,
340                                         (u32 *)&cfg->ot_limit);
341                 }
342
343                 for (j = 0; j < vbif->dynamic_ot_wr_tbl.count; j++) {
344                         const struct dpu_vbif_dynamic_ot_cfg *cfg =
345                                         &vbif->dynamic_ot_wr_tbl.cfg[j];
346
347                         snprintf(vbif_name, sizeof(vbif_name),
348                                         "dynamic_ot_wr_%d_pps", j);
349                         debugfs_create_u64(vbif_name, 0400, debugfs_vbif,
350                                         (u64 *)&cfg->pps);
351                         snprintf(vbif_name, sizeof(vbif_name),
352                                         "dynamic_ot_wr_%d_ot_limit", j);
353                         debugfs_create_u32(vbif_name, 0400, debugfs_vbif,
354                                         (u32 *)&cfg->ot_limit);
355                 }
356         }
357 }
358 #endif
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