2 * SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2018, The Linux Foundation
7 #include <linux/delay.h>
8 #include <linux/interconnect.h>
10 #include <linux/irqchip.h>
11 #include <linux/irqdesc.h>
12 #include <linux/irqchip/chained_irq.h>
13 #include <linux/of_platform.h>
14 #include <linux/platform_device.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/reset.h>
22 #define HW_INTR_STATUS 0x0010
24 #define UBWC_DEC_HW_VERSION 0x58
25 #define UBWC_STATIC 0x144
26 #define UBWC_CTRL_2 0x150
27 #define UBWC_PREDICTION_MODE 0x154
29 #define MIN_IB_BW 400000000UL /* Min ib vote 400MB */
31 struct msm_mdss_data {
33 /* can be read from register 0x58 */
45 struct clk_bulk_data *clocks;
49 unsigned long enabled_mask;
50 struct irq_domain *domain;
52 const struct msm_mdss_data *mdss_data;
53 struct icc_path *path[2];
57 static int msm_mdss_parse_data_bus_icc_path(struct device *dev,
58 struct msm_mdss *msm_mdss)
60 struct icc_path *path0;
61 struct icc_path *path1;
63 path0 = of_icc_get(dev, "mdp0-mem");
64 if (IS_ERR_OR_NULL(path0))
65 return PTR_ERR_OR_ZERO(path0);
67 msm_mdss->path[0] = path0;
68 msm_mdss->num_paths = 1;
70 path1 = of_icc_get(dev, "mdp1-mem");
71 if (!IS_ERR_OR_NULL(path1)) {
72 msm_mdss->path[1] = path1;
73 msm_mdss->num_paths++;
79 static void msm_mdss_put_icc_path(void *data)
81 struct msm_mdss *msm_mdss = data;
84 for (i = 0; i < msm_mdss->num_paths; i++)
85 icc_put(msm_mdss->path[i]);
88 static void msm_mdss_icc_request_bw(struct msm_mdss *msm_mdss, unsigned long bw)
92 for (i = 0; i < msm_mdss->num_paths; i++)
93 icc_set_bw(msm_mdss->path[i], 0, Bps_to_icc(bw));
96 static void msm_mdss_irq(struct irq_desc *desc)
98 struct msm_mdss *msm_mdss = irq_desc_get_handler_data(desc);
99 struct irq_chip *chip = irq_desc_get_chip(desc);
102 chained_irq_enter(chip, desc);
104 interrupts = readl_relaxed(msm_mdss->mmio + HW_INTR_STATUS);
107 irq_hw_number_t hwirq = fls(interrupts) - 1;
110 rc = generic_handle_domain_irq(msm_mdss->irq_controller.domain,
113 dev_err(msm_mdss->dev, "handle irq fail: irq=%lu rc=%d\n",
118 interrupts &= ~(1 << hwirq);
121 chained_irq_exit(chip, desc);
124 static void msm_mdss_irq_mask(struct irq_data *irqd)
126 struct msm_mdss *msm_mdss = irq_data_get_irq_chip_data(irqd);
129 smp_mb__before_atomic();
130 clear_bit(irqd->hwirq, &msm_mdss->irq_controller.enabled_mask);
132 smp_mb__after_atomic();
135 static void msm_mdss_irq_unmask(struct irq_data *irqd)
137 struct msm_mdss *msm_mdss = irq_data_get_irq_chip_data(irqd);
140 smp_mb__before_atomic();
141 set_bit(irqd->hwirq, &msm_mdss->irq_controller.enabled_mask);
143 smp_mb__after_atomic();
146 static struct irq_chip msm_mdss_irq_chip = {
148 .irq_mask = msm_mdss_irq_mask,
149 .irq_unmask = msm_mdss_irq_unmask,
152 static struct lock_class_key msm_mdss_lock_key, msm_mdss_request_key;
154 static int msm_mdss_irqdomain_map(struct irq_domain *domain,
155 unsigned int irq, irq_hw_number_t hwirq)
157 struct msm_mdss *msm_mdss = domain->host_data;
159 irq_set_lockdep_class(irq, &msm_mdss_lock_key, &msm_mdss_request_key);
160 irq_set_chip_and_handler(irq, &msm_mdss_irq_chip, handle_level_irq);
162 return irq_set_chip_data(irq, msm_mdss);
165 static const struct irq_domain_ops msm_mdss_irqdomain_ops = {
166 .map = msm_mdss_irqdomain_map,
167 .xlate = irq_domain_xlate_onecell,
170 static int _msm_mdss_irq_domain_add(struct msm_mdss *msm_mdss)
173 struct irq_domain *domain;
177 domain = irq_domain_add_linear(dev->of_node, 32,
178 &msm_mdss_irqdomain_ops, msm_mdss);
180 dev_err(dev, "failed to add irq_domain\n");
184 msm_mdss->irq_controller.enabled_mask = 0;
185 msm_mdss->irq_controller.domain = domain;
190 #define UBWC_1_0 0x10000000
191 #define UBWC_2_0 0x20000000
192 #define UBWC_3_0 0x30000000
193 #define UBWC_4_0 0x40000000
195 static void msm_mdss_setup_ubwc_dec_20(struct msm_mdss *msm_mdss)
197 const struct msm_mdss_data *data = msm_mdss->mdss_data;
199 writel_relaxed(data->ubwc_static, msm_mdss->mmio + UBWC_STATIC);
202 static void msm_mdss_setup_ubwc_dec_30(struct msm_mdss *msm_mdss)
204 const struct msm_mdss_data *data = msm_mdss->mdss_data;
205 u32 value = (data->ubwc_swizzle & 0x1) |
206 (data->highest_bank_bit & 0x3) << 4 |
207 (data->macrotile_mode & 0x1) << 12;
209 if (data->ubwc_version == UBWC_3_0)
212 if (data->ubwc_version == UBWC_1_0)
215 writel_relaxed(value, msm_mdss->mmio + UBWC_STATIC);
218 static void msm_mdss_setup_ubwc_dec_40(struct msm_mdss *msm_mdss)
220 const struct msm_mdss_data *data = msm_mdss->mdss_data;
221 u32 value = (data->ubwc_swizzle & 0x7) |
222 (data->ubwc_static & 0x1) << 3 |
223 (data->highest_bank_bit & 0x7) << 4 |
224 (data->macrotile_mode & 0x1) << 12;
226 writel_relaxed(value, msm_mdss->mmio + UBWC_STATIC);
228 if (data->ubwc_version == UBWC_3_0) {
229 writel_relaxed(1, msm_mdss->mmio + UBWC_CTRL_2);
230 writel_relaxed(0, msm_mdss->mmio + UBWC_PREDICTION_MODE);
232 writel_relaxed(2, msm_mdss->mmio + UBWC_CTRL_2);
233 writel_relaxed(1, msm_mdss->mmio + UBWC_PREDICTION_MODE);
237 static int msm_mdss_enable(struct msm_mdss *msm_mdss)
242 * Several components have AXI clocks that can only be turned on if
243 * the interconnect is enabled (non-zero bandwidth). Let's make sure
244 * that the interconnects are at least at a minimum amount.
246 msm_mdss_icc_request_bw(msm_mdss, MIN_IB_BW);
248 ret = clk_bulk_prepare_enable(msm_mdss->num_clocks, msm_mdss->clocks);
250 dev_err(msm_mdss->dev, "clock enable failed, ret:%d\n", ret);
255 * Register access requires MDSS_MDP_CLK, which is not enabled by the
256 * mdss on mdp5 hardware. Skip it for now.
258 if (msm_mdss->is_mdp5 || !msm_mdss->mdss_data)
262 * ubwc config is part of the "mdss" region which is not accessible
263 * from the rest of the driver. hardcode known configurations here
265 * Decoder version can be read from the UBWC_DEC_HW_VERSION reg,
266 * UBWC_n and the rest of params comes from hw data.
268 switch (msm_mdss->mdss_data->ubwc_dec_version) {
270 msm_mdss_setup_ubwc_dec_20(msm_mdss);
273 msm_mdss_setup_ubwc_dec_30(msm_mdss);
276 msm_mdss_setup_ubwc_dec_40(msm_mdss);
279 dev_err(msm_mdss->dev, "Unsupported UBWC decoder version %x\n",
280 msm_mdss->mdss_data->ubwc_dec_version);
281 dev_err(msm_mdss->dev, "HW_REV: 0x%x\n",
282 readl_relaxed(msm_mdss->mmio + HW_REV));
283 dev_err(msm_mdss->dev, "UBWC_DEC_HW_VERSION: 0x%x\n",
284 readl_relaxed(msm_mdss->mmio + UBWC_DEC_HW_VERSION));
291 static int msm_mdss_disable(struct msm_mdss *msm_mdss)
293 clk_bulk_disable_unprepare(msm_mdss->num_clocks, msm_mdss->clocks);
294 msm_mdss_icc_request_bw(msm_mdss, 0);
299 static void msm_mdss_destroy(struct msm_mdss *msm_mdss)
301 struct platform_device *pdev = to_platform_device(msm_mdss->dev);
304 pm_runtime_suspend(msm_mdss->dev);
305 pm_runtime_disable(msm_mdss->dev);
306 irq_domain_remove(msm_mdss->irq_controller.domain);
307 msm_mdss->irq_controller.domain = NULL;
308 irq = platform_get_irq(pdev, 0);
309 irq_set_chained_handler_and_data(irq, NULL, NULL);
312 static int msm_mdss_reset(struct device *dev)
314 struct reset_control *reset;
316 reset = reset_control_get_optional_exclusive(dev, NULL);
318 /* Optional reset not specified */
320 } else if (IS_ERR(reset)) {
321 return dev_err_probe(dev, PTR_ERR(reset),
322 "failed to acquire mdss reset\n");
325 reset_control_assert(reset);
327 * Tests indicate that reset has to be held for some period of time,
328 * make it one frame in a typical system
331 reset_control_deassert(reset);
333 reset_control_put(reset);
339 * MDP5 MDSS uses at most three specified clocks.
341 #define MDP5_MDSS_NUM_CLOCKS 3
342 static int mdp5_mdss_parse_clock(struct platform_device *pdev, struct clk_bulk_data **clocks)
344 struct clk_bulk_data *bulk;
351 bulk = devm_kcalloc(&pdev->dev, MDP5_MDSS_NUM_CLOCKS, sizeof(struct clk_bulk_data), GFP_KERNEL);
355 bulk[num_clocks++].id = "iface";
356 bulk[num_clocks++].id = "bus";
357 bulk[num_clocks++].id = "vsync";
359 ret = devm_clk_bulk_get_optional(&pdev->dev, num_clocks, bulk);
368 static struct msm_mdss *msm_mdss_init(struct platform_device *pdev, bool is_mdp5)
370 struct msm_mdss *msm_mdss;
374 ret = msm_mdss_reset(&pdev->dev);
378 msm_mdss = devm_kzalloc(&pdev->dev, sizeof(*msm_mdss), GFP_KERNEL);
380 return ERR_PTR(-ENOMEM);
382 msm_mdss->mmio = devm_platform_ioremap_resource_byname(pdev, is_mdp5 ? "mdss_phys" : "mdss");
383 if (IS_ERR(msm_mdss->mmio))
384 return ERR_CAST(msm_mdss->mmio);
386 dev_dbg(&pdev->dev, "mapped mdss address space @%pK\n", msm_mdss->mmio);
388 ret = msm_mdss_parse_data_bus_icc_path(&pdev->dev, msm_mdss);
391 ret = devm_add_action_or_reset(&pdev->dev, msm_mdss_put_icc_path, msm_mdss);
396 ret = mdp5_mdss_parse_clock(pdev, &msm_mdss->clocks);
398 ret = devm_clk_bulk_get_all(&pdev->dev, &msm_mdss->clocks);
400 dev_err(&pdev->dev, "failed to parse clocks, ret=%d\n", ret);
403 msm_mdss->num_clocks = ret;
404 msm_mdss->is_mdp5 = is_mdp5;
406 msm_mdss->dev = &pdev->dev;
408 irq = platform_get_irq(pdev, 0);
412 ret = _msm_mdss_irq_domain_add(msm_mdss);
416 irq_set_chained_handler_and_data(irq, msm_mdss_irq,
419 pm_runtime_enable(&pdev->dev);
424 static int __maybe_unused mdss_runtime_suspend(struct device *dev)
426 struct msm_mdss *mdss = dev_get_drvdata(dev);
430 return msm_mdss_disable(mdss);
433 static int __maybe_unused mdss_runtime_resume(struct device *dev)
435 struct msm_mdss *mdss = dev_get_drvdata(dev);
439 return msm_mdss_enable(mdss);
442 static int __maybe_unused mdss_pm_suspend(struct device *dev)
445 if (pm_runtime_suspended(dev))
448 return mdss_runtime_suspend(dev);
451 static int __maybe_unused mdss_pm_resume(struct device *dev)
453 if (pm_runtime_suspended(dev))
456 return mdss_runtime_resume(dev);
459 static const struct dev_pm_ops mdss_pm_ops = {
460 SET_SYSTEM_SLEEP_PM_OPS(mdss_pm_suspend, mdss_pm_resume)
461 SET_RUNTIME_PM_OPS(mdss_runtime_suspend, mdss_runtime_resume, NULL)
464 static int mdss_probe(struct platform_device *pdev)
466 struct msm_mdss *mdss;
467 bool is_mdp5 = of_device_is_compatible(pdev->dev.of_node, "qcom,mdss");
468 struct device *dev = &pdev->dev;
471 mdss = msm_mdss_init(pdev, is_mdp5);
473 return PTR_ERR(mdss);
475 mdss->mdss_data = of_device_get_match_data(&pdev->dev);
477 platform_set_drvdata(pdev, mdss);
480 * MDP5/DPU based devices don't have a flat hierarchy. There is a top
481 * level parent: MDSS, and children: MDP5/DPU, DSI, HDMI, eDP etc.
482 * Populate the children devices, find the MDP5/DPU node, and then add
483 * the interfaces to our components list.
485 ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
487 DRM_DEV_ERROR(dev, "failed to populate children devices\n");
488 msm_mdss_destroy(mdss);
495 static void mdss_remove(struct platform_device *pdev)
497 struct msm_mdss *mdss = platform_get_drvdata(pdev);
499 of_platform_depopulate(&pdev->dev);
501 msm_mdss_destroy(mdss);
504 static const struct msm_mdss_data sc7180_data = {
505 .ubwc_version = UBWC_2_0,
506 .ubwc_dec_version = UBWC_2_0,
510 static const struct msm_mdss_data sc7280_data = {
511 .ubwc_version = UBWC_3_0,
512 .ubwc_dec_version = UBWC_4_0,
515 .highest_bank_bit = 1,
519 static const struct msm_mdss_data sc8180x_data = {
520 .ubwc_version = UBWC_3_0,
521 .ubwc_dec_version = UBWC_3_0,
522 .highest_bank_bit = 3,
526 static const struct msm_mdss_data sc8280xp_data = {
527 .ubwc_version = UBWC_4_0,
528 .ubwc_dec_version = UBWC_4_0,
531 .highest_bank_bit = 2,
535 static const struct msm_mdss_data sdm845_data = {
536 .ubwc_version = UBWC_2_0,
537 .ubwc_dec_version = UBWC_2_0,
538 .highest_bank_bit = 2,
541 static const struct msm_mdss_data sm6350_data = {
542 .ubwc_version = UBWC_2_0,
543 .ubwc_dec_version = UBWC_2_0,
546 .highest_bank_bit = 1,
549 static const struct msm_mdss_data sm8150_data = {
550 .ubwc_version = UBWC_3_0,
551 .ubwc_dec_version = UBWC_3_0,
552 .highest_bank_bit = 2,
555 static const struct msm_mdss_data sm6115_data = {
556 .ubwc_version = UBWC_1_0,
557 .ubwc_dec_version = UBWC_2_0,
559 .ubwc_static = 0x11f,
562 static const struct msm_mdss_data sm8250_data = {
563 .ubwc_version = UBWC_4_0,
564 .ubwc_dec_version = UBWC_4_0,
567 /* TODO: highest_bank_bit = 2 for LP_DDR4 */
568 .highest_bank_bit = 3,
572 static const struct of_device_id mdss_dt_match[] = {
573 { .compatible = "qcom,mdss" },
574 { .compatible = "qcom,msm8998-mdss" },
575 { .compatible = "qcom,qcm2290-mdss" },
576 { .compatible = "qcom,sdm845-mdss", .data = &sdm845_data },
577 { .compatible = "qcom,sc7180-mdss", .data = &sc7180_data },
578 { .compatible = "qcom,sc7280-mdss", .data = &sc7280_data },
579 { .compatible = "qcom,sc8180x-mdss", .data = &sc8180x_data },
580 { .compatible = "qcom,sc8280xp-mdss", .data = &sc8280xp_data },
581 { .compatible = "qcom,sm6115-mdss", .data = &sm6115_data },
582 { .compatible = "qcom,sm6350-mdss", .data = &sm6350_data },
583 { .compatible = "qcom,sm6375-mdss", .data = &sm6350_data },
584 { .compatible = "qcom,sm8150-mdss", .data = &sm8150_data },
585 { .compatible = "qcom,sm8250-mdss", .data = &sm8250_data },
586 { .compatible = "qcom,sm8350-mdss", .data = &sm8250_data },
587 { .compatible = "qcom,sm8450-mdss", .data = &sm8250_data },
588 { .compatible = "qcom,sm8550-mdss", .data = &sm8250_data },
591 MODULE_DEVICE_TABLE(of, mdss_dt_match);
593 static struct platform_driver mdss_platform_driver = {
595 .remove_new = mdss_remove,
598 .of_match_table = mdss_dt_match,
603 void __init msm_mdss_register(void)
605 platform_driver_register(&mdss_platform_driver);
608 void __exit msm_mdss_unregister(void)
610 platform_driver_unregister(&mdss_platform_driver);