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drm/komeda: Rename main engine clk name "mclk" to "aclk"
[linux.git] / drivers / gpu / drm / arm / display / komeda / komeda_pipeline.h
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 #ifndef _KOMEDA_PIPELINE_H_
8 #define _KOMEDA_PIPELINE_H_
9
10 #include <linux/types.h>
11 #include <drm/drm_atomic.h>
12 #include <drm/drm_atomic_helper.h>
13 #include "malidp_utils.h"
14
15 #define KOMEDA_MAX_PIPELINES            2
16 #define KOMEDA_PIPELINE_MAX_LAYERS      4
17 #define KOMEDA_PIPELINE_MAX_SCALERS     2
18 #define KOMEDA_COMPONENT_N_INPUTS       5
19
20 /* pipeline component IDs */
21 enum {
22         KOMEDA_COMPONENT_LAYER0         = 0,
23         KOMEDA_COMPONENT_LAYER1         = 1,
24         KOMEDA_COMPONENT_LAYER2         = 2,
25         KOMEDA_COMPONENT_LAYER3         = 3,
26         KOMEDA_COMPONENT_WB_LAYER       = 7, /* write back layer */
27         KOMEDA_COMPONENT_SCALER0        = 8,
28         KOMEDA_COMPONENT_SCALER1        = 9,
29         KOMEDA_COMPONENT_SPLITTER       = 12,
30         KOMEDA_COMPONENT_MERGER         = 14,
31         KOMEDA_COMPONENT_COMPIZ0        = 16, /* compositor */
32         KOMEDA_COMPONENT_COMPIZ1        = 17,
33         KOMEDA_COMPONENT_IPS0           = 20, /* post image processor */
34         KOMEDA_COMPONENT_IPS1           = 21,
35         KOMEDA_COMPONENT_TIMING_CTRLR   = 22, /* timing controller */
36 };
37
38 #define KOMEDA_PIPELINE_LAYERS          (BIT(KOMEDA_COMPONENT_LAYER0) |\
39                                          BIT(KOMEDA_COMPONENT_LAYER1) |\
40                                          BIT(KOMEDA_COMPONENT_LAYER2) |\
41                                          BIT(KOMEDA_COMPONENT_LAYER3))
42
43 #define KOMEDA_PIPELINE_SCALERS         (BIT(KOMEDA_COMPONENT_SCALER0) |\
44                                          BIT(KOMEDA_COMPONENT_SCALER1))
45
46 #define KOMEDA_PIPELINE_COMPIZS         (BIT(KOMEDA_COMPONENT_COMPIZ0) |\
47                                          BIT(KOMEDA_COMPONENT_COMPIZ1))
48
49 #define KOMEDA_PIPELINE_IMPROCS         (BIT(KOMEDA_COMPONENT_IPS0) |\
50                                          BIT(KOMEDA_COMPONENT_IPS1))
51 struct komeda_component;
52 struct komeda_component_state;
53
54 /** komeda_component_funcs - component control functions */
55 struct komeda_component_funcs {
56         /** @validate: optional,
57          * component may has special requirements or limitations, this function
58          * supply HW the ability to do the further HW specific check.
59          */
60         int (*validate)(struct komeda_component *c,
61                         struct komeda_component_state *state);
62         /** @update: update is a active update */
63         void (*update)(struct komeda_component *c,
64                        struct komeda_component_state *state);
65         /** @disable: disable component */
66         void (*disable)(struct komeda_component *c);
67         /** @dump_register: Optional, dump registers to seq_file */
68         void (*dump_register)(struct komeda_component *c, struct seq_file *seq);
69 };
70
71 /**
72  * struct komeda_component
73  *
74  * struct komeda_component describe the data flow capabilities for how to link a
75  * component into the display pipeline.
76  * all specified components are subclass of this structure.
77  */
78 struct komeda_component {
79         /** @obj: treat component as private obj */
80         struct drm_private_obj obj;
81         /** @pipeline: the komeda pipeline this component belongs to */
82         struct komeda_pipeline *pipeline;
83         /** @name: component name */
84         char name[32];
85         /**
86          * @reg:
87          * component register base,
88          * which is initialized by chip and used by chip only
89          */
90         u32 __iomem *reg;
91         /** @id: component id */
92         u32 id;
93         /**
94          * @hw_id: component hw id,
95          * which is initialized by chip and used by chip only
96          */
97         u32 hw_id;
98
99         /**
100          * @max_active_inputs:
101          * @max_active_outputs:
102          *
103          * maximum number of inputs/outputs that can be active at the same time
104          * Note:
105          * the number isn't the bit number of @supported_inputs or
106          * @supported_outputs, but may be less than it, since component may not
107          * support enabling all @supported_inputs/outputs at the same time.
108          */
109         u8 max_active_inputs;
110         /** @max_active_outputs: maximum number of outputs */
111         u8 max_active_outputs;
112         /**
113          * @supported_inputs:
114          * @supported_outputs:
115          *
116          * bitmask of BIT(component->id) for the supported inputs/outputs,
117          * describes the possibilities of how a component is linked into a
118          * pipeline.
119          */
120         u32 supported_inputs;
121         /** @supported_outputs: bitmask of supported output componenet ids */
122         u32 supported_outputs;
123
124         /**
125          * @funcs: chip functions to access HW
126          */
127         const struct komeda_component_funcs *funcs;
128 };
129
130 /**
131  * struct komeda_component_output
132  *
133  * a component has multiple outputs, if want to know where the data
134  * comes from, only know the component is not enough, we still need to know
135  * its output port
136  */
137 struct komeda_component_output {
138         /** @component: indicate which component the data comes from */
139         struct komeda_component *component;
140         /**
141          * @output_port:
142          * the output port of the &komeda_component_output.component
143          */
144         u8 output_port;
145 };
146
147 /**
148  * struct komeda_component_state
149  *
150  * component_state is the data flow configuration of the component, and it's
151  * the superclass of all specific component_state like @komeda_layer_state,
152  * @komeda_scaler_state
153  */
154 struct komeda_component_state {
155         /** @obj: tracking component_state by drm_atomic_state */
156         struct drm_private_state obj;
157         /** @component: backpointer to the component */
158         struct komeda_component *component;
159         /**
160          * @binding_user:
161          * currently bound user, the user can be @crtc, @plane or @wb_conn,
162          * which is valid decided by @component and @inputs
163          *
164          * -  Layer: its user always is plane.
165          * -  compiz/improc/timing_ctrlr: the user is crtc.
166          * -  wb_layer: wb_conn;
167          * -  scaler: plane when input is layer, wb_conn if input is compiz.
168          */
169         union {
170                 /** @crtc: backpointer for user crtc */
171                 struct drm_crtc *crtc;
172                 /** @plane: backpointer for user plane */
173                 struct drm_plane *plane;
174                 /** @wb_conn: backpointer for user wb_connector  */
175                 struct drm_connector *wb_conn;
176                 void *binding_user;
177         };
178
179         /**
180          * @active_inputs:
181          *
182          * active_inputs is bitmask of @inputs index
183          *
184          * -  active_inputs = changed_active_inputs | unchanged_active_inputs
185          * -  affected_inputs = old->active_inputs | new->active_inputs;
186          * -  disabling_inputs = affected_inputs ^ active_inputs;
187          * -  changed_inputs = disabling_inputs | changed_active_inputs;
188          *
189          * NOTE:
190          * changed_inputs doesn't include all active_input but only
191          * @changed_active_inputs, and this bitmask can be used in chip
192          * level for dirty update.
193          */
194         u16 active_inputs;
195         /** @changed_active_inputs: bitmask of the changed @active_inputs */
196         u16 changed_active_inputs;
197         /** @affected_inputs: bitmask for affected @inputs */
198         u16 affected_inputs;
199         /**
200          * @inputs:
201          *
202          * the specific inputs[i] only valid on BIT(i) has been set in
203          * @active_inputs, if not the inputs[i] is undefined.
204          */
205         struct komeda_component_output inputs[KOMEDA_COMPONENT_N_INPUTS];
206 };
207
208 static inline u16 component_disabling_inputs(struct komeda_component_state *st)
209 {
210         return st->affected_inputs ^ st->active_inputs;
211 }
212
213 static inline u16 component_changed_inputs(struct komeda_component_state *st)
214 {
215         return component_disabling_inputs(st) | st->changed_active_inputs;
216 }
217
218 #define for_each_changed_input(st, i)   \
219         for ((i) = 0; (i) < (st)->component->max_active_inputs; (i)++)  \
220                 if (has_bit((i), component_changed_inputs(st)))
221
222 #define to_comp(__c)    (((__c) == NULL) ? NULL : &((__c)->base))
223 #define to_cpos(__c)    ((struct komeda_component **)&(__c))
224
225 struct komeda_layer {
226         struct komeda_component base;
227         /* accepted h/v input range before rotation */
228         struct malidp_range hsize_in, vsize_in;
229         u32 layer_type; /* RICH, SIMPLE or WB */
230         u32 supported_rots;
231 };
232
233 struct komeda_layer_state {
234         struct komeda_component_state base;
235         /* layer specific configuration state */
236         u16 hsize, vsize;
237         u32 rot;
238         u16 afbc_crop_l;
239         u16 afbc_crop_r;
240         u16 afbc_crop_t;
241         u16 afbc_crop_b;
242         dma_addr_t addr[3];
243 };
244
245 struct komeda_scaler {
246         struct komeda_component base;
247         struct malidp_range hsize, vsize;
248         u32 max_upscaling;
249         u32 max_downscaling;
250 };
251
252 struct komeda_scaler_state {
253         struct komeda_component_state base;
254         u16 hsize_in, vsize_in;
255         u16 hsize_out, vsize_out;
256         u8 en_scaling : 1,
257            en_alpha : 1, /* enable alpha processing */
258            en_img_enhancement : 1;
259 };
260
261 struct komeda_compiz {
262         struct komeda_component base;
263         struct malidp_range hsize, vsize;
264 };
265
266 struct komeda_compiz_input_cfg {
267         u16 hsize, vsize;
268         u16 hoffset, voffset;
269         u8 pixel_blend_mode, layer_alpha;
270 };
271
272 struct komeda_compiz_state {
273         struct komeda_component_state base;
274         /* composition size */
275         u16 hsize, vsize;
276         struct komeda_compiz_input_cfg cins[KOMEDA_COMPONENT_N_INPUTS];
277 };
278
279 struct komeda_improc {
280         struct komeda_component base;
281         u32 supported_color_formats;  /* DRM_RGB/YUV444/YUV420*/
282         u32 supported_color_depths; /* BIT(8) | BIT(10)*/
283         u8 supports_degamma : 1;
284         u8 supports_csc : 1;
285         u8 supports_gamma : 1;
286 };
287
288 struct komeda_improc_state {
289         struct komeda_component_state base;
290         u16 hsize, vsize;
291 };
292
293 /* display timing controller */
294 struct komeda_timing_ctrlr {
295         struct komeda_component base;
296         u8 supports_dual_link : 1;
297 };
298
299 struct komeda_timing_ctrlr_state {
300         struct komeda_component_state base;
301 };
302
303 /* Why define A separated structure but not use plane_state directly ?
304  * 1. Komeda supports layer_split which means a plane_state can be split and
305  *    handled by two layers, one layer only handle half of plane image.
306  * 2. Fix up the user properties according to HW's capabilities, like user
307  *    set rotation to R180, but HW only supports REFLECT_X+Y. the rot here is
308  *    after drm_rotation_simplify()
309  */
310 struct komeda_data_flow_cfg {
311         struct komeda_component_output input;
312         u16 in_x, in_y, in_w, in_h;
313         u32 out_x, out_y, out_w, out_h;
314         u32 rot;
315         int blending_zorder;
316         u8 pixel_blend_mode, layer_alpha;
317         u8 en_scaling : 1,
318            en_img_enhancement : 1;
319 };
320
321 struct komeda_pipeline_funcs {
322         /* check if the aclk (main engine clock) can satisfy the clock
323          * requirements of the downscaling that specified by dflow
324          */
325         int (*downscaling_clk_check)(struct komeda_pipeline *pipe,
326                                      struct drm_display_mode *mode,
327                                      unsigned long aclk_rate,
328                                      struct komeda_data_flow_cfg *dflow);
329         /* dump_register: Optional, dump registers to seq_file */
330         void (*dump_register)(struct komeda_pipeline *pipe,
331                               struct seq_file *sf);
332 };
333
334 /**
335  * struct komeda_pipeline
336  *
337  * Represent a complete display pipeline and hold all functional components.
338  */
339 struct komeda_pipeline {
340         /** @obj: link pipeline as private obj of drm_atomic_state */
341         struct drm_private_obj obj;
342         /** @mdev: the parent komeda_dev */
343         struct komeda_dev *mdev;
344         /** @pxlclk: pixel clock */
345         struct clk *pxlclk;
346         /** @id: pipeline id */
347         int id;
348         /** @avail_comps: available components mask of pipeline */
349         u32 avail_comps;
350         /** @n_layers: the number of layer on @layers */
351         int n_layers;
352         /** @layers: the pipeline layers */
353         struct komeda_layer *layers[KOMEDA_PIPELINE_MAX_LAYERS];
354         /** @n_scalers: the number of scaler on @scalers */
355         int n_scalers;
356         /** @scalers: the pipeline scalers */
357         struct komeda_scaler *scalers[KOMEDA_PIPELINE_MAX_SCALERS];
358         /** @compiz: compositor */
359         struct komeda_compiz *compiz;
360         /** @wb_layer: writeback layer */
361         struct komeda_layer  *wb_layer;
362         /** @improc: post image processor */
363         struct komeda_improc *improc;
364         /** @ctrlr: timing controller */
365         struct komeda_timing_ctrlr *ctrlr;
366         /** @funcs: chip private pipeline functions */
367         const struct komeda_pipeline_funcs *funcs;
368
369         /** @of_node: pipeline dt node */
370         struct device_node *of_node;
371         /** @of_output_port: pipeline output port */
372         struct device_node *of_output_port;
373         /** @of_output_dev: output connector device node */
374         struct device_node *of_output_dev;
375 };
376
377 /**
378  * struct komeda_pipeline_state
379  *
380  * NOTE:
381  * Unlike the pipeline, pipeline_state doesn’t gather any component_state
382  * into it. It because all component will be managed by drm_atomic_state.
383  */
384 struct komeda_pipeline_state {
385         /** @obj: tracking pipeline_state by drm_atomic_state */
386         struct drm_private_state obj;
387         /** @pipe: backpointer to the pipeline */
388         struct komeda_pipeline *pipe;
389         /** @crtc: currently bound crtc */
390         struct drm_crtc *crtc;
391         /**
392          * @active_comps:
393          *
394          * bitmask - BIT(component->id) of active components
395          */
396         u32 active_comps;
397 };
398
399 #define to_layer(c)     container_of(c, struct komeda_layer, base)
400 #define to_compiz(c)    container_of(c, struct komeda_compiz, base)
401 #define to_scaler(c)    container_of(c, struct komeda_scaler, base)
402 #define to_improc(c)    container_of(c, struct komeda_improc, base)
403 #define to_ctrlr(c)     container_of(c, struct komeda_timing_ctrlr, base)
404
405 #define to_layer_st(c)  container_of(c, struct komeda_layer_state, base)
406 #define to_compiz_st(c) container_of(c, struct komeda_compiz_state, base)
407 #define to_scaler_st(c) container_of(c, struct komeda_scaler_state, base)
408 #define to_improc_st(c) container_of(c, struct komeda_improc_state, base)
409 #define to_ctrlr_st(c)  container_of(c, struct komeda_timing_ctrlr_state, base)
410
411 #define priv_to_comp_st(o) container_of(o, struct komeda_component_state, obj)
412 #define priv_to_pipe_st(o)  container_of(o, struct komeda_pipeline_state, obj)
413
414 /* pipeline APIs */
415 struct komeda_pipeline *
416 komeda_pipeline_add(struct komeda_dev *mdev, size_t size,
417                     const struct komeda_pipeline_funcs *funcs);
418 void komeda_pipeline_destroy(struct komeda_dev *mdev,
419                              struct komeda_pipeline *pipe);
420 int komeda_assemble_pipelines(struct komeda_dev *mdev);
421 struct komeda_component *
422 komeda_pipeline_get_component(struct komeda_pipeline *pipe, int id);
423 struct komeda_component *
424 komeda_pipeline_get_first_component(struct komeda_pipeline *pipe,
425                                     u32 comp_mask);
426
427 void komeda_pipeline_dump_register(struct komeda_pipeline *pipe,
428                                    struct seq_file *sf);
429
430 /* component APIs */
431 struct komeda_component *
432 komeda_component_add(struct komeda_pipeline *pipe,
433                      size_t comp_sz, u32 id, u32 hw_id,
434                      const struct komeda_component_funcs *funcs,
435                      u8 max_active_inputs, u32 supported_inputs,
436                      u8 max_active_outputs, u32 __iomem *reg,
437                      const char *name_fmt, ...);
438
439 void komeda_component_destroy(struct komeda_dev *mdev,
440                               struct komeda_component *c);
441
442 static inline struct komeda_component *
443 komeda_component_pickup_output(struct komeda_component *c, u32 avail_comps)
444 {
445         u32 avail_inputs = c->supported_outputs & (avail_comps);
446
447         return komeda_pipeline_get_first_component(c->pipeline, avail_inputs);
448 }
449
450 struct komeda_plane_state;
451 struct komeda_crtc_state;
452 struct komeda_crtc;
453
454 void pipeline_composition_size(struct komeda_crtc_state *kcrtc_st,
455                                u16 *hsize, u16 *vsize);
456
457 int komeda_build_layer_data_flow(struct komeda_layer *layer,
458                                  struct komeda_plane_state *kplane_st,
459                                  struct komeda_crtc_state *kcrtc_st,
460                                  struct komeda_data_flow_cfg *dflow);
461 int komeda_build_wb_data_flow(struct komeda_layer *wb_layer,
462                               struct drm_connector_state *conn_st,
463                               struct komeda_crtc_state *kcrtc_st,
464                               struct komeda_data_flow_cfg *dflow);
465 int komeda_build_display_data_flow(struct komeda_crtc *kcrtc,
466                                    struct komeda_crtc_state *kcrtc_st);
467
468 int komeda_release_unclaimed_resources(struct komeda_pipeline *pipe,
469                                        struct komeda_crtc_state *kcrtc_st);
470
471 struct komeda_pipeline_state *
472 komeda_pipeline_get_old_state(struct komeda_pipeline *pipe,
473                               struct drm_atomic_state *state);
474 void komeda_pipeline_disable(struct komeda_pipeline *pipe,
475                              struct drm_atomic_state *old_state);
476 void komeda_pipeline_update(struct komeda_pipeline *pipe,
477                             struct drm_atomic_state *old_state);
478
479 void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow);
480
481 #endif /* _KOMEDA_PIPELINE_H_*/