2 * Copyright (C) 2016 BayLibre, SAS
3 * Author: Neil Armstrong <narmstrong@baylibre.com>
4 * Copyright (C) 2014 Endless Mobile
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of the
9 * License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 * Jasper St. Pierre <jstpierre@mecheye.net>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/mutex.h>
26 #include <linux/platform_device.h>
27 #include <linux/component.h>
28 #include <linux/of_graph.h>
31 #include <drm/drm_atomic.h>
32 #include <drm/drm_atomic_helper.h>
33 #include <drm/drm_flip_work.h>
34 #include <drm/drm_crtc_helper.h>
35 #include <drm/drm_plane_helper.h>
36 #include <drm/drm_gem_cma_helper.h>
37 #include <drm/drm_gem_framebuffer_helper.h>
38 #include <drm/drm_fb_cma_helper.h>
39 #include <drm/drm_rect.h>
40 #include <drm/drm_fb_helper.h>
42 #include "meson_drv.h"
43 #include "meson_plane.h"
44 #include "meson_crtc.h"
45 #include "meson_venc_cvbs.h"
47 #include "meson_vpp.h"
48 #include "meson_viu.h"
49 #include "meson_venc.h"
50 #include "meson_canvas.h"
51 #include "meson_registers.h"
53 #define DRIVER_NAME "meson"
54 #define DRIVER_DESC "Amlogic Meson DRM driver"
57 * DOC: Video Processing Unit
59 * VPU Handles the Global Video Processing, it includes management of the
60 * clocks gates, blocks reset lines and power domains.
64 * - Full reset of entire video processing HW blocks
65 * - Scaling and setup of the VPU clock
67 * - Powering up video processing HW blocks
68 * - Powering Up HDMI controller and PHY
71 static void meson_fb_output_poll_changed(struct drm_device *dev)
73 struct meson_drm *priv = dev->dev_private;
75 drm_fbdev_cma_hotplug_event(priv->fbdev);
78 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
79 .output_poll_changed = meson_fb_output_poll_changed,
80 .atomic_check = drm_atomic_helper_check,
81 .atomic_commit = drm_atomic_helper_commit,
82 .fb_create = drm_gem_fb_create,
85 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
86 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
89 static irqreturn_t meson_irq(int irq, void *arg)
91 struct drm_device *dev = arg;
92 struct meson_drm *priv = dev->dev_private;
94 (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
101 DEFINE_DRM_GEM_CMA_FOPS(fops);
103 static struct drm_driver meson_driver = {
104 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM |
105 DRIVER_MODESET | DRIVER_PRIME |
109 .irq_handler = meson_irq,
112 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
113 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
114 .gem_prime_import = drm_gem_prime_import,
115 .gem_prime_export = drm_gem_prime_export,
116 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
117 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
118 .gem_prime_vmap = drm_gem_cma_prime_vmap,
119 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
120 .gem_prime_mmap = drm_gem_cma_prime_mmap,
123 .dumb_create = drm_gem_cma_dumb_create,
124 .gem_free_object_unlocked = drm_gem_cma_free_object,
125 .gem_vm_ops = &drm_gem_cma_vm_ops,
136 static bool meson_vpu_has_available_connectors(struct device *dev)
138 struct device_node *ep, *remote;
140 /* Parses each endpoint and check if remote exists */
141 for_each_endpoint_of_node(dev->of_node, ep) {
142 /* If the endpoint node exists, consider it enabled */
143 remote = of_graph_get_remote_port(ep);
154 static struct regmap_config meson_regmap_config = {
158 .max_register = 0x1000,
161 static void meson_vpu_init(struct meson_drm *priv)
163 writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
164 writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
165 writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
166 writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
169 static int meson_drv_bind_master(struct device *dev, bool has_components)
171 struct platform_device *pdev = to_platform_device(dev);
172 struct meson_drm *priv;
173 struct drm_device *drm;
174 struct resource *res;
178 /* Checks if an output connector is available */
179 if (!meson_vpu_has_available_connectors(dev)) {
180 dev_err(dev, "No output connector available\n");
184 drm = drm_dev_alloc(&meson_driver, dev);
188 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
193 drm->dev_private = priv;
197 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
198 regs = devm_ioremap_resource(dev, res);
204 priv->io_base = regs;
206 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
211 /* Simply ioremap since it may be a shared register zone */
212 regs = devm_ioremap(dev, res->start, resource_size(res));
214 ret = -EADDRNOTAVAIL;
218 priv->hhi = devm_regmap_init_mmio(dev, regs,
219 &meson_regmap_config);
220 if (IS_ERR(priv->hhi)) {
221 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
222 ret = PTR_ERR(priv->hhi);
226 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
231 /* Simply ioremap since it may be a shared register zone */
232 regs = devm_ioremap(dev, res->start, resource_size(res));
234 ret = -EADDRNOTAVAIL;
238 priv->dmc = devm_regmap_init_mmio(dev, regs,
239 &meson_regmap_config);
240 if (IS_ERR(priv->dmc)) {
241 dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
242 ret = PTR_ERR(priv->dmc);
246 priv->vsync_irq = platform_get_irq(pdev, 0);
248 ret = drm_vblank_init(drm, 1);
252 drm_mode_config_init(drm);
253 drm->mode_config.max_width = 3840;
254 drm->mode_config.max_height = 2160;
255 drm->mode_config.funcs = &meson_mode_config_funcs;
256 drm->mode_config.helper_private = &meson_mode_config_helpers;
258 /* Hardware Initialization */
260 meson_vpu_init(priv);
261 meson_venc_init(priv);
262 meson_vpp_init(priv);
263 meson_viu_init(priv);
265 /* Encoder Initialization */
267 ret = meson_venc_cvbs_create(priv);
271 if (has_components) {
272 ret = component_bind_all(drm->dev, drm);
274 dev_err(drm->dev, "Couldn't bind all components\n");
279 ret = meson_plane_create(priv);
283 ret = meson_crtc_create(priv);
287 ret = drm_irq_install(drm, priv->vsync_irq);
291 drm_mode_config_reset(drm);
293 priv->fbdev = drm_fbdev_cma_init(drm, 32,
294 drm->mode_config.num_connector);
295 if (IS_ERR(priv->fbdev)) {
296 ret = PTR_ERR(priv->fbdev);
300 drm_kms_helper_poll_init(drm);
302 platform_set_drvdata(pdev, priv);
304 ret = drm_dev_register(drm, 0);
311 drm_irq_uninstall(drm);
318 static int meson_drv_bind(struct device *dev)
320 return meson_drv_bind_master(dev, true);
323 static void meson_drv_unbind(struct device *dev)
325 struct meson_drm *priv = dev_get_drvdata(dev);
326 struct drm_device *drm = priv->drm;
328 drm_dev_unregister(drm);
329 drm_irq_uninstall(drm);
330 drm_kms_helper_poll_fini(drm);
331 drm_fbdev_cma_fini(priv->fbdev);
332 drm_mode_config_cleanup(drm);
337 static const struct component_master_ops meson_drv_master_ops = {
338 .bind = meson_drv_bind,
339 .unbind = meson_drv_unbind,
342 static int compare_of(struct device *dev, void *data)
344 DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
347 return dev->of_node == data;
350 /* Possible connectors nodes to ignore */
351 static const struct of_device_id connectors_match[] = {
352 { .compatible = "composite-video-connector" },
353 { .compatible = "svideo-connector" },
354 { .compatible = "hdmi-connector" },
355 { .compatible = "dvi-connector" },
359 static int meson_probe_remote(struct platform_device *pdev,
360 struct component_match **match,
361 struct device_node *parent,
362 struct device_node *remote)
364 struct device_node *ep, *remote_node;
367 /* If node is a connector, return and do not add to match table */
368 if (of_match_node(connectors_match, remote))
371 component_match_add(&pdev->dev, match, compare_of, remote);
373 for_each_endpoint_of_node(remote, ep) {
374 remote_node = of_graph_get_remote_port_parent(ep);
376 remote_node == parent || /* Ignore parent endpoint */
377 !of_device_is_available(remote_node)) {
378 of_node_put(remote_node);
382 count += meson_probe_remote(pdev, match, remote, remote_node);
384 of_node_put(remote_node);
390 static void meson_drv_shutdown(struct platform_device *pdev)
392 struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
397 drm_kms_helper_poll_fini(priv->drm);
398 drm_atomic_helper_shutdown(priv->drm);
401 static int meson_drv_probe(struct platform_device *pdev)
403 struct component_match *match = NULL;
404 struct device_node *np = pdev->dev.of_node;
405 struct device_node *ep, *remote;
408 for_each_endpoint_of_node(np, ep) {
409 remote = of_graph_get_remote_port_parent(ep);
410 if (!remote || !of_device_is_available(remote)) {
415 count += meson_probe_remote(pdev, &match, np, remote);
420 return meson_drv_bind_master(&pdev->dev, false);
422 /* If some endpoints were found, initialize the nodes */
424 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
426 return component_master_add_with_match(&pdev->dev,
427 &meson_drv_master_ops,
431 /* If no output endpoints were available, simply bail out */
435 static const struct of_device_id dt_match[] = {
436 { .compatible = "amlogic,meson-gxbb-vpu" },
437 { .compatible = "amlogic,meson-gxl-vpu" },
438 { .compatible = "amlogic,meson-gxm-vpu" },
441 MODULE_DEVICE_TABLE(of, dt_match);
443 static struct platform_driver meson_drm_platform_driver = {
444 .probe = meson_drv_probe,
445 .shutdown = meson_drv_shutdown,
448 .of_match_table = dt_match,
452 module_platform_driver(meson_drm_platform_driver);
454 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
455 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
456 MODULE_DESCRIPTION(DRIVER_DESC);
457 MODULE_LICENSE("GPL");