1 // SPDX-License-Identifier: GPL-2.0-only
3 * (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
4 * Author: Liviu Dudau <Liviu.Dudau@arm.com>
6 * ARM Mali DP500/DP550/DP650 KMS/DRM driver
9 #include <linux/module.h>
10 #include <linux/clk.h>
11 #include <linux/component.h>
12 #include <linux/of_device.h>
13 #include <linux/of_graph.h>
14 #include <linux/of_reserved_mem.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/debugfs.h>
18 #include <drm/drm_atomic.h>
19 #include <drm/drm_atomic_helper.h>
20 #include <drm/drm_crtc.h>
21 #include <drm/drm_drv.h>
22 #include <drm/drm_fb_cma_helper.h>
23 #include <drm/drm_fb_helper.h>
24 #include <drm/drm_fourcc.h>
25 #include <drm/drm_gem_cma_helper.h>
26 #include <drm/drm_gem_framebuffer_helper.h>
27 #include <drm/drm_modeset_helper.h>
28 #include <drm/drm_of.h>
29 #include <drm/drm_probe_helper.h>
30 #include <drm/drm_vblank.h>
32 #include "malidp_drv.h"
33 #include "malidp_mw.h"
34 #include "malidp_regs.h"
35 #include "malidp_hw.h"
37 #define MALIDP_CONF_VALID_TIMEOUT 250
38 #define AFBC_HEADER_SIZE 16
39 #define AFBC_SUPERBLK_ALIGNMENT 128
41 static void malidp_write_gamma_table(struct malidp_hw_device *hwdev,
42 u32 data[MALIDP_COEFFTAB_NUM_COEFFS])
45 /* Update all channels with a single gamma curve. */
46 const u32 gamma_write_mask = GENMASK(18, 16);
48 * Always write an entire table, so the address field in
49 * DE_COEFFTAB_ADDR is 0 and we can use the gamma_write_mask bitmask
52 malidp_hw_write(hwdev, gamma_write_mask,
53 hwdev->hw->map.coeffs_base + MALIDP_COEF_TABLE_ADDR);
54 for (i = 0; i < MALIDP_COEFFTAB_NUM_COEFFS; ++i)
55 malidp_hw_write(hwdev, data[i],
56 hwdev->hw->map.coeffs_base +
57 MALIDP_COEF_TABLE_DATA);
60 static void malidp_atomic_commit_update_gamma(struct drm_crtc *crtc,
61 struct drm_crtc_state *old_state)
63 struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
64 struct malidp_hw_device *hwdev = malidp->dev;
66 if (!crtc->state->color_mgmt_changed)
69 if (!crtc->state->gamma_lut) {
70 malidp_hw_clearbits(hwdev,
71 MALIDP_DISP_FUNC_GAMMA,
72 MALIDP_DE_DISPLAY_FUNC);
74 struct malidp_crtc_state *mc =
75 to_malidp_crtc_state(crtc->state);
77 if (!old_state->gamma_lut || (crtc->state->gamma_lut->base.id !=
78 old_state->gamma_lut->base.id))
79 malidp_write_gamma_table(hwdev, mc->gamma_coeffs);
81 malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_GAMMA,
82 MALIDP_DE_DISPLAY_FUNC);
87 void malidp_atomic_commit_update_coloradj(struct drm_crtc *crtc,
88 struct drm_crtc_state *old_state)
90 struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
91 struct malidp_hw_device *hwdev = malidp->dev;
94 if (!crtc->state->color_mgmt_changed)
97 if (!crtc->state->ctm) {
98 malidp_hw_clearbits(hwdev, MALIDP_DISP_FUNC_CADJ,
99 MALIDP_DE_DISPLAY_FUNC);
101 struct malidp_crtc_state *mc =
102 to_malidp_crtc_state(crtc->state);
104 if (!old_state->ctm || (crtc->state->ctm->base.id !=
105 old_state->ctm->base.id))
106 for (i = 0; i < MALIDP_COLORADJ_NUM_COEFFS; ++i)
107 malidp_hw_write(hwdev,
108 mc->coloradj_coeffs[i],
109 hwdev->hw->map.coeffs_base +
110 MALIDP_COLOR_ADJ_COEF + 4 * i);
112 malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_CADJ,
113 MALIDP_DE_DISPLAY_FUNC);
117 static void malidp_atomic_commit_se_config(struct drm_crtc *crtc,
118 struct drm_crtc_state *old_state)
120 struct malidp_crtc_state *cs = to_malidp_crtc_state(crtc->state);
121 struct malidp_crtc_state *old_cs = to_malidp_crtc_state(old_state);
122 struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
123 struct malidp_hw_device *hwdev = malidp->dev;
124 struct malidp_se_config *s = &cs->scaler_config;
125 struct malidp_se_config *old_s = &old_cs->scaler_config;
126 u32 se_control = hwdev->hw->map.se_base +
127 ((hwdev->hw->map.features & MALIDP_REGMAP_HAS_CLEARIRQ) ?
129 u32 layer_control = se_control + MALIDP_SE_LAYER_CONTROL;
130 u32 scr = se_control + MALIDP_SE_SCALING_CONTROL;
134 if (!s->scale_enable) {
135 val = malidp_hw_read(hwdev, se_control);
136 val &= ~MALIDP_SE_SCALING_EN;
137 malidp_hw_write(hwdev, val, se_control);
141 hwdev->hw->se_set_scaling_coeffs(hwdev, s, old_s);
142 val = malidp_hw_read(hwdev, se_control);
143 val |= MALIDP_SE_SCALING_EN | MALIDP_SE_ALPHA_EN;
145 val &= ~MALIDP_SE_ENH(MALIDP_SE_ENH_MASK);
146 val |= s->enhancer_enable ? MALIDP_SE_ENH(3) : 0;
148 val |= MALIDP_SE_RGBO_IF_EN;
149 malidp_hw_write(hwdev, val, se_control);
151 /* Set IN_SIZE & OUT_SIZE. */
152 val = MALIDP_SE_SET_V_SIZE(s->input_h) |
153 MALIDP_SE_SET_H_SIZE(s->input_w);
154 malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_IN_SIZE);
155 val = MALIDP_SE_SET_V_SIZE(s->output_h) |
156 MALIDP_SE_SET_H_SIZE(s->output_w);
157 malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_OUT_SIZE);
159 /* Set phase regs. */
160 malidp_hw_write(hwdev, s->h_init_phase, scr + MALIDP_SE_H_INIT_PH);
161 malidp_hw_write(hwdev, s->h_delta_phase, scr + MALIDP_SE_H_DELTA_PH);
162 malidp_hw_write(hwdev, s->v_init_phase, scr + MALIDP_SE_V_INIT_PH);
163 malidp_hw_write(hwdev, s->v_delta_phase, scr + MALIDP_SE_V_DELTA_PH);
167 * set the "config valid" bit and wait until the hardware acts on it
169 static int malidp_set_and_wait_config_valid(struct drm_device *drm)
171 struct malidp_drm *malidp = drm->dev_private;
172 struct malidp_hw_device *hwdev = malidp->dev;
175 hwdev->hw->set_config_valid(hwdev, 1);
176 /* don't wait for config_valid flag if we are in config mode */
177 if (hwdev->hw->in_config_mode(hwdev)) {
178 atomic_set(&malidp->config_valid, MALIDP_CONFIG_VALID_DONE);
182 ret = wait_event_interruptible_timeout(malidp->wq,
183 atomic_read(&malidp->config_valid) == MALIDP_CONFIG_VALID_DONE,
184 msecs_to_jiffies(MALIDP_CONF_VALID_TIMEOUT));
186 return (ret > 0) ? 0 : -ETIMEDOUT;
189 static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state)
191 struct drm_device *drm = state->dev;
192 struct malidp_drm *malidp = drm->dev_private;
195 malidp->event = malidp->crtc.state->event;
196 malidp->crtc.state->event = NULL;
198 if (malidp->crtc.state->active) {
200 * if we have an event to deliver to userspace, make sure
201 * the vblank is enabled as we are sending it from the IRQ
205 drm_crtc_vblank_get(&malidp->crtc);
207 /* only set config_valid if the CRTC is enabled */
208 if (malidp_set_and_wait_config_valid(drm) < 0) {
210 * make a loop around the second CVAL setting and
211 * try 5 times before giving up.
214 if (!malidp_set_and_wait_config_valid(drm))
217 DRM_DEBUG_DRIVER("timed out waiting for updated configuration\n");
220 } else if (malidp->event) {
221 /* CRTC inactive means vblank IRQ is disabled, send event directly */
222 spin_lock_irq(&drm->event_lock);
223 drm_crtc_send_vblank_event(&malidp->crtc, malidp->event);
224 malidp->event = NULL;
225 spin_unlock_irq(&drm->event_lock);
227 drm_atomic_helper_commit_hw_done(state);
230 static void malidp_atomic_commit_tail(struct drm_atomic_state *state)
232 struct drm_device *drm = state->dev;
233 struct malidp_drm *malidp = drm->dev_private;
234 struct drm_crtc *crtc;
235 struct drm_crtc_state *old_crtc_state;
238 pm_runtime_get_sync(drm->dev);
241 * set config_valid to a special value to let IRQ handlers
242 * know that we are updating registers
244 atomic_set(&malidp->config_valid, MALIDP_CONFIG_START);
245 malidp->dev->hw->set_config_valid(malidp->dev, 0);
247 drm_atomic_helper_commit_modeset_disables(drm, state);
249 for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
250 malidp_atomic_commit_update_gamma(crtc, old_crtc_state);
251 malidp_atomic_commit_update_coloradj(crtc, old_crtc_state);
252 malidp_atomic_commit_se_config(crtc, old_crtc_state);
255 drm_atomic_helper_commit_planes(drm, state, DRM_PLANE_COMMIT_ACTIVE_ONLY);
257 malidp_mw_atomic_commit(drm, state);
259 drm_atomic_helper_commit_modeset_enables(drm, state);
261 malidp_atomic_commit_hw_done(state);
263 pm_runtime_put(drm->dev);
265 drm_atomic_helper_cleanup_planes(drm, state);
268 static const struct drm_mode_config_helper_funcs malidp_mode_config_helpers = {
269 .atomic_commit_tail = malidp_atomic_commit_tail,
273 malidp_verify_afbc_framebuffer_caps(struct drm_device *dev,
274 const struct drm_mode_fb_cmd2 *mode_cmd)
276 if (malidp_format_mod_supported(dev, mode_cmd->pixel_format,
277 mode_cmd->modifier[0]) == false)
280 if (mode_cmd->offsets[0] != 0) {
281 DRM_DEBUG_KMS("AFBC buffers' plane offset should be 0\n");
285 switch (mode_cmd->modifier[0] & AFBC_SIZE_MASK) {
286 case AFBC_SIZE_16X16:
287 if ((mode_cmd->width % 16) || (mode_cmd->height % 16)) {
288 DRM_DEBUG_KMS("AFBC buffers must be aligned to 16 pixels\n");
293 DRM_DEBUG_KMS("Unsupported AFBC block size\n");
301 malidp_verify_afbc_framebuffer_size(struct drm_device *dev,
302 struct drm_file *file,
303 const struct drm_mode_fb_cmd2 *mode_cmd)
305 int n_superblocks = 0;
306 const struct drm_format_info *info;
307 struct drm_gem_object *objs = NULL;
308 u32 afbc_superblock_size = 0, afbc_superblock_height = 0;
309 u32 afbc_superblock_width = 0, afbc_size = 0;
312 switch (mode_cmd->modifier[0] & AFBC_SIZE_MASK) {
313 case AFBC_SIZE_16X16:
314 afbc_superblock_height = 16;
315 afbc_superblock_width = 16;
318 DRM_DEBUG_KMS("AFBC superblock size is not supported\n");
322 info = drm_get_format_info(dev, mode_cmd);
324 n_superblocks = (mode_cmd->width / afbc_superblock_width) *
325 (mode_cmd->height / afbc_superblock_height);
327 bpp = malidp_format_get_bpp(info->format);
329 afbc_superblock_size = (bpp * afbc_superblock_width * afbc_superblock_height)
332 afbc_size = ALIGN(n_superblocks * AFBC_HEADER_SIZE, AFBC_SUPERBLK_ALIGNMENT);
333 afbc_size += n_superblocks * ALIGN(afbc_superblock_size, AFBC_SUPERBLK_ALIGNMENT);
335 if ((mode_cmd->width * bpp) != (mode_cmd->pitches[0] * BITS_PER_BYTE)) {
336 DRM_DEBUG_KMS("Invalid value of (pitch * BITS_PER_BYTE) (=%u) "
337 "should be same as width (=%u) * bpp (=%u)\n",
338 (mode_cmd->pitches[0] * BITS_PER_BYTE),
339 mode_cmd->width, bpp);
343 objs = drm_gem_object_lookup(file, mode_cmd->handles[0]);
345 DRM_DEBUG_KMS("Failed to lookup GEM object\n");
349 if (objs->size < afbc_size) {
350 DRM_DEBUG_KMS("buffer size (%zu) too small for AFBC buffer size = %u\n",
351 objs->size, afbc_size);
352 drm_gem_object_put(objs);
356 drm_gem_object_put(objs);
362 malidp_verify_afbc_framebuffer(struct drm_device *dev, struct drm_file *file,
363 const struct drm_mode_fb_cmd2 *mode_cmd)
365 if (malidp_verify_afbc_framebuffer_caps(dev, mode_cmd))
366 return malidp_verify_afbc_framebuffer_size(dev, file, mode_cmd);
371 static struct drm_framebuffer *
372 malidp_fb_create(struct drm_device *dev, struct drm_file *file,
373 const struct drm_mode_fb_cmd2 *mode_cmd)
375 if (mode_cmd->modifier[0]) {
376 if (!malidp_verify_afbc_framebuffer(dev, file, mode_cmd))
377 return ERR_PTR(-EINVAL);
380 return drm_gem_fb_create(dev, file, mode_cmd);
383 static const struct drm_mode_config_funcs malidp_mode_config_funcs = {
384 .fb_create = malidp_fb_create,
385 .atomic_check = drm_atomic_helper_check,
386 .atomic_commit = drm_atomic_helper_commit,
389 static int malidp_init(struct drm_device *drm)
392 struct malidp_drm *malidp = drm->dev_private;
393 struct malidp_hw_device *hwdev = malidp->dev;
395 drm_mode_config_init(drm);
397 drm->mode_config.min_width = hwdev->min_line_size;
398 drm->mode_config.min_height = hwdev->min_line_size;
399 drm->mode_config.max_width = hwdev->max_line_size;
400 drm->mode_config.max_height = hwdev->max_line_size;
401 drm->mode_config.funcs = &malidp_mode_config_funcs;
402 drm->mode_config.helper_private = &malidp_mode_config_helpers;
403 drm->mode_config.allow_fb_modifiers = true;
405 ret = malidp_crtc_init(drm);
409 ret = malidp_mw_connector_init(drm);
416 drm_mode_config_cleanup(drm);
420 static void malidp_fini(struct drm_device *drm)
422 drm_mode_config_cleanup(drm);
425 static int malidp_irq_init(struct platform_device *pdev)
427 int irq_de, irq_se, ret = 0;
428 struct drm_device *drm = dev_get_drvdata(&pdev->dev);
429 struct malidp_drm *malidp = drm->dev_private;
430 struct malidp_hw_device *hwdev = malidp->dev;
432 /* fetch the interrupts from DT */
433 irq_de = platform_get_irq_byname(pdev, "DE");
435 DRM_ERROR("no 'DE' IRQ specified!\n");
438 irq_se = platform_get_irq_byname(pdev, "SE");
440 DRM_ERROR("no 'SE' IRQ specified!\n");
444 ret = malidp_de_irq_init(drm, irq_de);
448 ret = malidp_se_irq_init(drm, irq_se);
450 malidp_de_irq_fini(hwdev);
457 DEFINE_DRM_GEM_CMA_FOPS(fops);
459 static int malidp_dumb_create(struct drm_file *file_priv,
460 struct drm_device *drm,
461 struct drm_mode_create_dumb *args)
463 struct malidp_drm *malidp = drm->dev_private;
464 /* allocate for the worst case scenario, i.e. rotated buffers */
465 u8 alignment = malidp_hw_get_pitch_align(malidp->dev, 1);
467 args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), alignment);
469 return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
472 #ifdef CONFIG_DEBUG_FS
474 static void malidp_error_stats_init(struct malidp_error_stats *error_stats)
476 error_stats->num_errors = 0;
477 error_stats->last_error_status = 0;
478 error_stats->last_error_vblank = -1;
481 void malidp_error(struct malidp_drm *malidp,
482 struct malidp_error_stats *error_stats, u32 status,
485 unsigned long irqflags;
487 spin_lock_irqsave(&malidp->errors_lock, irqflags);
488 error_stats->last_error_status = status;
489 error_stats->last_error_vblank = vblank;
490 error_stats->num_errors++;
491 spin_unlock_irqrestore(&malidp->errors_lock, irqflags);
494 static void malidp_error_stats_dump(const char *prefix,
495 struct malidp_error_stats error_stats,
498 seq_printf(m, "[%s] num_errors : %d\n", prefix,
499 error_stats.num_errors);
500 seq_printf(m, "[%s] last_error_status : 0x%08x\n", prefix,
501 error_stats.last_error_status);
502 seq_printf(m, "[%s] last_error_vblank : %lld\n", prefix,
503 error_stats.last_error_vblank);
506 static int malidp_show_stats(struct seq_file *m, void *arg)
508 struct drm_device *drm = m->private;
509 struct malidp_drm *malidp = drm->dev_private;
510 unsigned long irqflags;
511 struct malidp_error_stats de_errors, se_errors;
513 spin_lock_irqsave(&malidp->errors_lock, irqflags);
514 de_errors = malidp->de_errors;
515 se_errors = malidp->se_errors;
516 spin_unlock_irqrestore(&malidp->errors_lock, irqflags);
517 malidp_error_stats_dump("DE", de_errors, m);
518 malidp_error_stats_dump("SE", se_errors, m);
522 static int malidp_debugfs_open(struct inode *inode, struct file *file)
524 return single_open(file, malidp_show_stats, inode->i_private);
527 static ssize_t malidp_debugfs_write(struct file *file, const char __user *ubuf,
528 size_t len, loff_t *offp)
530 struct seq_file *m = file->private_data;
531 struct drm_device *drm = m->private;
532 struct malidp_drm *malidp = drm->dev_private;
533 unsigned long irqflags;
535 spin_lock_irqsave(&malidp->errors_lock, irqflags);
536 malidp_error_stats_init(&malidp->de_errors);
537 malidp_error_stats_init(&malidp->se_errors);
538 spin_unlock_irqrestore(&malidp->errors_lock, irqflags);
542 static const struct file_operations malidp_debugfs_fops = {
543 .owner = THIS_MODULE,
544 .open = malidp_debugfs_open,
546 .write = malidp_debugfs_write,
548 .release = single_release,
551 static void malidp_debugfs_init(struct drm_minor *minor)
553 struct malidp_drm *malidp = minor->dev->dev_private;
555 malidp_error_stats_init(&malidp->de_errors);
556 malidp_error_stats_init(&malidp->se_errors);
557 spin_lock_init(&malidp->errors_lock);
558 debugfs_create_file("debug", S_IRUGO | S_IWUSR, minor->debugfs_root,
559 minor->dev, &malidp_debugfs_fops);
562 #endif //CONFIG_DEBUG_FS
564 static const struct drm_driver malidp_driver = {
565 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
566 DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(malidp_dumb_create),
567 #ifdef CONFIG_DEBUG_FS
568 .debugfs_init = malidp_debugfs_init,
572 .desc = "ARM Mali Display Processor driver",
578 static const struct of_device_id malidp_drm_of_match[] = {
580 .compatible = "arm,mali-dp500",
581 .data = &malidp_device[MALIDP_500]
584 .compatible = "arm,mali-dp550",
585 .data = &malidp_device[MALIDP_550]
588 .compatible = "arm,mali-dp650",
589 .data = &malidp_device[MALIDP_650]
593 MODULE_DEVICE_TABLE(of, malidp_drm_of_match);
595 static bool malidp_is_compatible_hw_id(struct malidp_hw_device *hwdev,
596 const struct of_device_id *dev_id)
599 const char *compatstr_dp500 = "arm,mali-dp500";
604 * The DP500 CORE_ID register is in a different location, so check it
605 * first. If the product id field matches, then this is DP500, otherwise
606 * check the DP550/650 CORE_ID register.
608 core_id = malidp_hw_read(hwdev, MALIDP500_DC_BASE + MALIDP_DE_CORE_ID);
609 /* Offset 0x18 will never read 0x500 on products other than DP500. */
610 is_dp500 = (MALIDP_PRODUCT_ID(core_id) == 0x500);
611 dt_is_dp500 = strnstr(dev_id->compatible, compatstr_dp500,
612 sizeof(dev_id->compatible)) != NULL;
613 if (is_dp500 != dt_is_dp500) {
614 DRM_ERROR("Device-tree expects %s, but hardware %s DP500.\n",
615 dev_id->compatible, is_dp500 ? "is" : "is not");
617 } else if (!dt_is_dp500) {
621 core_id = malidp_hw_read(hwdev,
622 MALIDP550_DC_BASE + MALIDP_DE_CORE_ID);
623 product_id = MALIDP_PRODUCT_ID(core_id);
624 snprintf(buf, sizeof(buf), "arm,mali-dp%X", product_id);
625 if (!strnstr(dev_id->compatible, buf,
626 sizeof(dev_id->compatible))) {
627 DRM_ERROR("Device-tree expects %s, but hardware is DP%03X.\n",
628 dev_id->compatible, product_id);
635 static bool malidp_has_sufficient_address_space(const struct resource *res,
636 const struct of_device_id *dev_id)
638 resource_size_t res_size = resource_size(res);
639 const char *compatstr_dp500 = "arm,mali-dp500";
641 if (!strnstr(dev_id->compatible, compatstr_dp500,
642 sizeof(dev_id->compatible)))
643 return res_size >= MALIDP550_ADDR_SPACE_SIZE;
644 else if (res_size < MALIDP500_ADDR_SPACE_SIZE)
649 static ssize_t core_id_show(struct device *dev, struct device_attribute *attr,
652 struct drm_device *drm = dev_get_drvdata(dev);
653 struct malidp_drm *malidp = drm->dev_private;
655 return snprintf(buf, PAGE_SIZE, "%08x\n", malidp->core_id);
658 static DEVICE_ATTR_RO(core_id);
660 static struct attribute *mali_dp_attrs[] = {
661 &dev_attr_core_id.attr,
664 ATTRIBUTE_GROUPS(mali_dp);
666 #define MAX_OUTPUT_CHANNELS 3
668 static int malidp_runtime_pm_suspend(struct device *dev)
670 struct drm_device *drm = dev_get_drvdata(dev);
671 struct malidp_drm *malidp = drm->dev_private;
672 struct malidp_hw_device *hwdev = malidp->dev;
674 /* we can only suspend if the hardware is in config mode */
675 WARN_ON(!hwdev->hw->in_config_mode(hwdev));
677 malidp_se_irq_fini(hwdev);
678 malidp_de_irq_fini(hwdev);
679 hwdev->pm_suspended = true;
680 clk_disable_unprepare(hwdev->mclk);
681 clk_disable_unprepare(hwdev->aclk);
682 clk_disable_unprepare(hwdev->pclk);
687 static int malidp_runtime_pm_resume(struct device *dev)
689 struct drm_device *drm = dev_get_drvdata(dev);
690 struct malidp_drm *malidp = drm->dev_private;
691 struct malidp_hw_device *hwdev = malidp->dev;
693 clk_prepare_enable(hwdev->pclk);
694 clk_prepare_enable(hwdev->aclk);
695 clk_prepare_enable(hwdev->mclk);
696 hwdev->pm_suspended = false;
697 malidp_de_irq_hw_init(hwdev);
698 malidp_se_irq_hw_init(hwdev);
703 static int malidp_bind(struct device *dev)
705 struct resource *res;
706 struct drm_device *drm;
707 struct malidp_drm *malidp;
708 struct malidp_hw_device *hwdev;
709 struct platform_device *pdev = to_platform_device(dev);
710 struct of_device_id const *dev_id;
711 struct drm_encoder *encoder;
712 /* number of lines for the R, G and B output */
713 u8 output_width[MAX_OUTPUT_CHANNELS];
715 u32 version, out_depth = 0;
717 malidp = devm_kzalloc(dev, sizeof(*malidp), GFP_KERNEL);
721 hwdev = devm_kzalloc(dev, sizeof(*hwdev), GFP_KERNEL);
725 hwdev->hw = (struct malidp_hw *)of_device_get_match_data(dev);
728 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
729 hwdev->regs = devm_ioremap_resource(dev, res);
730 if (IS_ERR(hwdev->regs))
731 return PTR_ERR(hwdev->regs);
733 hwdev->pclk = devm_clk_get(dev, "pclk");
734 if (IS_ERR(hwdev->pclk))
735 return PTR_ERR(hwdev->pclk);
737 hwdev->aclk = devm_clk_get(dev, "aclk");
738 if (IS_ERR(hwdev->aclk))
739 return PTR_ERR(hwdev->aclk);
741 hwdev->mclk = devm_clk_get(dev, "mclk");
742 if (IS_ERR(hwdev->mclk))
743 return PTR_ERR(hwdev->mclk);
745 hwdev->pxlclk = devm_clk_get(dev, "pxlclk");
746 if (IS_ERR(hwdev->pxlclk))
747 return PTR_ERR(hwdev->pxlclk);
749 /* Get the optional framebuffer memory resource */
750 ret = of_reserved_mem_device_init(dev);
751 if (ret && ret != -ENODEV)
754 drm = drm_dev_alloc(&malidp_driver, dev);
760 drm->dev_private = malidp;
761 dev_set_drvdata(dev, drm);
763 /* Enable power management */
764 pm_runtime_enable(dev);
766 /* Resume device to enable the clocks */
767 if (pm_runtime_enabled(dev))
768 pm_runtime_get_sync(dev);
770 malidp_runtime_pm_resume(dev);
772 dev_id = of_match_device(malidp_drm_of_match, dev);
778 if (!malidp_has_sufficient_address_space(res, dev_id)) {
779 DRM_ERROR("Insufficient address space in device-tree.\n");
784 if (!malidp_is_compatible_hw_id(hwdev, dev_id)) {
789 ret = hwdev->hw->query_hw(hwdev);
791 DRM_ERROR("Invalid HW configuration\n");
795 version = malidp_hw_read(hwdev, hwdev->hw->map.dc_base + MALIDP_DE_CORE_ID);
796 DRM_INFO("found ARM Mali-DP%3x version r%dp%d\n", version >> 16,
797 (version >> 12) & 0xf, (version >> 8) & 0xf);
799 malidp->core_id = version;
801 ret = of_property_read_u32(dev->of_node,
802 "arm,malidp-arqos-value",
803 &hwdev->arqos_value);
805 hwdev->arqos_value = 0x0;
807 /* set the number of lines used for output of RGB data */
808 ret = of_property_read_u8_array(dev->of_node,
809 "arm,malidp-output-port-lines",
810 output_width, MAX_OUTPUT_CHANNELS);
814 for (i = 0; i < MAX_OUTPUT_CHANNELS; i++)
815 out_depth = (out_depth << 8) | (output_width[i] & 0xf);
816 malidp_hw_write(hwdev, out_depth, hwdev->hw->map.out_depth_base);
817 hwdev->output_color_depth = out_depth;
819 atomic_set(&malidp->config_valid, MALIDP_CONFIG_VALID_INIT);
820 init_waitqueue_head(&malidp->wq);
822 ret = malidp_init(drm);
826 /* Set the CRTC's port so that the encoder component can find it */
827 malidp->crtc.port = of_graph_get_port_by_id(dev->of_node, 0);
829 ret = component_bind_all(dev, drm);
831 DRM_ERROR("Failed to bind all components\n");
835 /* We expect to have a maximum of two encoders one for the actual
836 * display and a virtual one for the writeback connector
838 WARN_ON(drm->mode_config.num_encoder > 2);
839 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) {
840 encoder->possible_clones =
841 (1 << drm->mode_config.num_encoder) - 1;
844 ret = malidp_irq_init(pdev);
848 drm->irq_enabled = true;
850 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
852 DRM_ERROR("failed to initialise vblank\n");
857 drm_mode_config_reset(drm);
859 drm_kms_helper_poll_init(drm);
861 ret = drm_dev_register(drm, 0);
865 drm_fbdev_generic_setup(drm, 32);
870 drm_kms_helper_poll_fini(drm);
871 pm_runtime_get_sync(dev);
873 malidp_se_irq_fini(hwdev);
874 malidp_de_irq_fini(hwdev);
875 drm->irq_enabled = false;
877 drm_atomic_helper_shutdown(drm);
878 component_unbind_all(dev, drm);
880 of_node_put(malidp->crtc.port);
881 malidp->crtc.port = NULL;
885 if (pm_runtime_enabled(dev))
886 pm_runtime_disable(dev);
888 malidp_runtime_pm_suspend(dev);
889 drm->dev_private = NULL;
890 dev_set_drvdata(dev, NULL);
893 of_reserved_mem_device_release(dev);
898 static void malidp_unbind(struct device *dev)
900 struct drm_device *drm = dev_get_drvdata(dev);
901 struct malidp_drm *malidp = drm->dev_private;
902 struct malidp_hw_device *hwdev = malidp->dev;
904 drm_dev_unregister(drm);
905 drm_kms_helper_poll_fini(drm);
906 pm_runtime_get_sync(dev);
907 drm_atomic_helper_shutdown(drm);
908 malidp_se_irq_fini(hwdev);
909 malidp_de_irq_fini(hwdev);
910 drm->irq_enabled = false;
911 component_unbind_all(dev, drm);
912 of_node_put(malidp->crtc.port);
913 malidp->crtc.port = NULL;
916 if (pm_runtime_enabled(dev))
917 pm_runtime_disable(dev);
919 malidp_runtime_pm_suspend(dev);
920 drm->dev_private = NULL;
921 dev_set_drvdata(dev, NULL);
923 of_reserved_mem_device_release(dev);
926 static const struct component_master_ops malidp_master_ops = {
928 .unbind = malidp_unbind,
931 static int malidp_compare_dev(struct device *dev, void *data)
933 struct device_node *np = data;
935 return dev->of_node == np;
938 static int malidp_platform_probe(struct platform_device *pdev)
940 struct device_node *port;
941 struct component_match *match = NULL;
943 if (!pdev->dev.of_node)
946 /* there is only one output port inside each device, find it */
947 port = of_graph_get_remote_node(pdev->dev.of_node, 0, 0);
951 drm_of_component_match_add(&pdev->dev, &match, malidp_compare_dev,
954 return component_master_add_with_match(&pdev->dev, &malidp_master_ops,
958 static int malidp_platform_remove(struct platform_device *pdev)
960 component_master_del(&pdev->dev, &malidp_master_ops);
964 static int __maybe_unused malidp_pm_suspend(struct device *dev)
966 struct drm_device *drm = dev_get_drvdata(dev);
968 return drm_mode_config_helper_suspend(drm);
971 static int __maybe_unused malidp_pm_resume(struct device *dev)
973 struct drm_device *drm = dev_get_drvdata(dev);
975 drm_mode_config_helper_resume(drm);
980 static int __maybe_unused malidp_pm_suspend_late(struct device *dev)
982 if (!pm_runtime_status_suspended(dev)) {
983 malidp_runtime_pm_suspend(dev);
984 pm_runtime_set_suspended(dev);
989 static int __maybe_unused malidp_pm_resume_early(struct device *dev)
991 malidp_runtime_pm_resume(dev);
992 pm_runtime_set_active(dev);
996 static const struct dev_pm_ops malidp_pm_ops = {
997 SET_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend, malidp_pm_resume) \
998 SET_LATE_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend_late, malidp_pm_resume_early) \
999 SET_RUNTIME_PM_OPS(malidp_runtime_pm_suspend, malidp_runtime_pm_resume, NULL)
1002 static struct platform_driver malidp_platform_driver = {
1003 .probe = malidp_platform_probe,
1004 .remove = malidp_platform_remove,
1007 .pm = &malidp_pm_ops,
1008 .of_match_table = malidp_drm_of_match,
1009 .dev_groups = mali_dp_groups,
1013 module_platform_driver(malidp_platform_driver);
1015 MODULE_AUTHOR("Liviu Dudau <Liviu.Dudau@arm.com>");
1016 MODULE_DESCRIPTION("ARM Mali DP DRM driver");
1017 MODULE_LICENSE("GPL v2");