1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2016 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 * Copyright (C) 2014 Endless Mobile
8 * Jasper St. Pierre <jstpierre@mecheye.net>
11 #include <linux/component.h>
12 #include <linux/module.h>
13 #include <linux/of_graph.h>
14 #include <linux/platform_device.h>
15 #include <linux/soc/amlogic/meson-canvas.h>
17 #include <drm/drm_atomic_helper.h>
18 #include <drm/drm_drv.h>
19 #include <drm/drm_fb_helper.h>
20 #include <drm/drm_gem_cma_helper.h>
21 #include <drm/drm_gem_framebuffer_helper.h>
22 #include <drm/drm_irq.h>
23 #include <drm/drm_modeset_helper_vtables.h>
24 #include <drm/drm_probe_helper.h>
25 #include <drm/drm_vblank.h>
27 #include "meson_crtc.h"
28 #include "meson_drv.h"
29 #include "meson_overlay.h"
30 #include "meson_plane.h"
31 #include "meson_registers.h"
32 #include "meson_venc_cvbs.h"
33 #include "meson_viu.h"
34 #include "meson_vpp.h"
36 #define DRIVER_NAME "meson"
37 #define DRIVER_DESC "Amlogic Meson DRM driver"
40 * DOC: Video Processing Unit
42 * VPU Handles the Global Video Processing, it includes management of the
43 * clocks gates, blocks reset lines and power domains.
47 * - Full reset of entire video processing HW blocks
48 * - Scaling and setup of the VPU clock
50 * - Powering up video processing HW blocks
51 * - Powering Up HDMI controller and PHY
54 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
55 .atomic_check = drm_atomic_helper_check,
56 .atomic_commit = drm_atomic_helper_commit,
57 .fb_create = drm_gem_fb_create,
60 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
61 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
64 static irqreturn_t meson_irq(int irq, void *arg)
66 struct drm_device *dev = arg;
67 struct meson_drm *priv = dev->dev_private;
69 (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
76 static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
77 struct drm_mode_create_dumb *args)
80 * We need 64bytes aligned stride, and PAGE aligned size
82 args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
83 args->size = PAGE_ALIGN(args->pitch * args->height);
85 return drm_gem_cma_dumb_create_internal(file, dev, args);
88 DEFINE_DRM_GEM_CMA_FOPS(fops);
90 static struct drm_driver meson_driver = {
91 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
94 .irq_handler = meson_irq,
97 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
98 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
99 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
100 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
101 .gem_prime_vmap = drm_gem_cma_prime_vmap,
102 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
103 .gem_prime_mmap = drm_gem_cma_prime_mmap,
106 .dumb_create = meson_dumb_create,
107 .gem_free_object_unlocked = drm_gem_cma_free_object,
108 .gem_vm_ops = &drm_gem_cma_vm_ops,
119 static bool meson_vpu_has_available_connectors(struct device *dev)
121 struct device_node *ep, *remote;
123 /* Parses each endpoint and check if remote exists */
124 for_each_endpoint_of_node(dev->of_node, ep) {
125 /* If the endpoint node exists, consider it enabled */
126 remote = of_graph_get_remote_port(ep);
134 static struct regmap_config meson_regmap_config = {
138 .max_register = 0x1000,
141 static void meson_vpu_init(struct meson_drm *priv)
143 writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
144 writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
145 writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
146 writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
149 static void meson_remove_framebuffers(void)
151 struct apertures_struct *ap;
153 ap = alloc_apertures(1);
157 /* The framebuffer can be located anywhere in RAM */
158 ap->ranges[0].base = 0;
159 ap->ranges[0].size = ~0;
161 drm_fb_helper_remove_conflicting_framebuffers(ap, "meson-drm-fb",
166 static int meson_drv_bind_master(struct device *dev, bool has_components)
168 struct platform_device *pdev = to_platform_device(dev);
169 struct meson_drm *priv;
170 struct drm_device *drm;
171 struct resource *res;
175 /* Checks if an output connector is available */
176 if (!meson_vpu_has_available_connectors(dev)) {
177 dev_err(dev, "No output connector available\n");
181 drm = drm_dev_alloc(&meson_driver, dev);
185 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
190 drm->dev_private = priv;
194 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
195 regs = devm_ioremap_resource(dev, res);
201 priv->io_base = regs;
203 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
208 /* Simply ioremap since it may be a shared register zone */
209 regs = devm_ioremap(dev, res->start, resource_size(res));
211 ret = -EADDRNOTAVAIL;
215 priv->hhi = devm_regmap_init_mmio(dev, regs,
216 &meson_regmap_config);
217 if (IS_ERR(priv->hhi)) {
218 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
219 ret = PTR_ERR(priv->hhi);
223 priv->canvas = meson_canvas_get(dev);
224 if (IS_ERR(priv->canvas)) {
225 ret = PTR_ERR(priv->canvas);
229 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
232 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
234 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
237 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
239 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
240 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
243 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
245 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
246 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
247 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
251 priv->vsync_irq = platform_get_irq(pdev, 0);
253 ret = drm_vblank_init(drm, 1);
257 /* Remove early framebuffers (ie. simplefb) */
258 meson_remove_framebuffers();
260 drm_mode_config_init(drm);
261 drm->mode_config.max_width = 3840;
262 drm->mode_config.max_height = 2160;
263 drm->mode_config.funcs = &meson_mode_config_funcs;
264 drm->mode_config.helper_private = &meson_mode_config_helpers;
266 /* Hardware Initialization */
268 meson_vpu_init(priv);
269 meson_venc_init(priv);
270 meson_vpp_init(priv);
271 meson_viu_init(priv);
273 /* Encoder Initialization */
275 ret = meson_venc_cvbs_create(priv);
279 if (has_components) {
280 ret = component_bind_all(drm->dev, drm);
282 dev_err(drm->dev, "Couldn't bind all components\n");
287 ret = meson_plane_create(priv);
291 ret = meson_overlay_create(priv);
295 ret = meson_crtc_create(priv);
299 ret = drm_irq_install(drm, priv->vsync_irq);
303 drm_mode_config_reset(drm);
305 drm_kms_helper_poll_init(drm);
307 platform_set_drvdata(pdev, priv);
309 ret = drm_dev_register(drm, 0);
313 drm_fbdev_generic_setup(drm, 32);
318 drm_irq_uninstall(drm);
325 static int meson_drv_bind(struct device *dev)
327 return meson_drv_bind_master(dev, true);
330 static void meson_drv_unbind(struct device *dev)
332 struct meson_drm *priv = dev_get_drvdata(dev);
333 struct drm_device *drm = priv->drm;
336 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
337 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
338 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
339 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
342 drm_dev_unregister(drm);
343 drm_irq_uninstall(drm);
344 drm_kms_helper_poll_fini(drm);
345 drm_mode_config_cleanup(drm);
350 static const struct component_master_ops meson_drv_master_ops = {
351 .bind = meson_drv_bind,
352 .unbind = meson_drv_unbind,
355 static int compare_of(struct device *dev, void *data)
357 DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
360 return dev->of_node == data;
363 /* Possible connectors nodes to ignore */
364 static const struct of_device_id connectors_match[] = {
365 { .compatible = "composite-video-connector" },
366 { .compatible = "svideo-connector" },
367 { .compatible = "hdmi-connector" },
368 { .compatible = "dvi-connector" },
372 static int meson_probe_remote(struct platform_device *pdev,
373 struct component_match **match,
374 struct device_node *parent,
375 struct device_node *remote)
377 struct device_node *ep, *remote_node;
380 /* If node is a connector, return and do not add to match table */
381 if (of_match_node(connectors_match, remote))
384 component_match_add(&pdev->dev, match, compare_of, remote);
386 for_each_endpoint_of_node(remote, ep) {
387 remote_node = of_graph_get_remote_port_parent(ep);
389 remote_node == parent || /* Ignore parent endpoint */
390 !of_device_is_available(remote_node)) {
391 of_node_put(remote_node);
395 count += meson_probe_remote(pdev, match, remote, remote_node);
397 of_node_put(remote_node);
403 static int meson_drv_probe(struct platform_device *pdev)
405 struct component_match *match = NULL;
406 struct device_node *np = pdev->dev.of_node;
407 struct device_node *ep, *remote;
410 for_each_endpoint_of_node(np, ep) {
411 remote = of_graph_get_remote_port_parent(ep);
412 if (!remote || !of_device_is_available(remote)) {
417 count += meson_probe_remote(pdev, &match, np, remote);
422 return meson_drv_bind_master(&pdev->dev, false);
424 /* If some endpoints were found, initialize the nodes */
426 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
428 return component_master_add_with_match(&pdev->dev,
429 &meson_drv_master_ops,
433 /* If no output endpoints were available, simply bail out */
437 static const struct of_device_id dt_match[] = {
438 { .compatible = "amlogic,meson-gxbb-vpu" },
439 { .compatible = "amlogic,meson-gxl-vpu" },
440 { .compatible = "amlogic,meson-gxm-vpu" },
441 { .compatible = "amlogic,meson-g12a-vpu" },
444 MODULE_DEVICE_TABLE(of, dt_match);
446 static struct platform_driver meson_drm_platform_driver = {
447 .probe = meson_drv_probe,
450 .of_match_table = dt_match,
454 module_platform_driver(meson_drm_platform_driver);
456 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
457 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
458 MODULE_DESCRIPTION(DRIVER_DESC);
459 MODULE_LICENSE("GPL");