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_fb_cma_helper.h>
38 #include <drm/drm_rect.h>
39 #include <drm/drm_fb_helper.h>
41 #include "meson_drv.h"
42 #include "meson_plane.h"
43 #include "meson_crtc.h"
44 #include "meson_venc_cvbs.h"
46 #include "meson_vpp.h"
47 #include "meson_viu.h"
48 #include "meson_venc.h"
49 #include "meson_canvas.h"
50 #include "meson_registers.h"
52 #define DRIVER_NAME "meson"
53 #define DRIVER_DESC "Amlogic Meson DRM driver"
56 * DOC: Video Processing Unit
58 * VPU Handles the Global Video Processing, it includes management of the
59 * clocks gates, blocks reset lines and power domains.
63 * - Full reset of entire video processing HW blocks
64 * - Scaling and setup of the VPU clock
66 * - Powering up video processing HW blocks
67 * - Powering Up HDMI controller and PHY
70 static void meson_fb_output_poll_changed(struct drm_device *dev)
72 struct meson_drm *priv = dev->dev_private;
74 drm_fbdev_cma_hotplug_event(priv->fbdev);
77 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
78 .output_poll_changed = meson_fb_output_poll_changed,
79 .atomic_check = drm_atomic_helper_check,
80 .atomic_commit = drm_atomic_helper_commit,
81 .fb_create = drm_fb_cma_create,
84 static irqreturn_t meson_irq(int irq, void *arg)
86 struct drm_device *dev = arg;
87 struct meson_drm *priv = dev->dev_private;
89 (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
96 DEFINE_DRM_GEM_CMA_FOPS(fops);
98 static struct drm_driver meson_driver = {
99 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM |
100 DRIVER_MODESET | DRIVER_PRIME |
104 .irq_handler = meson_irq,
107 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
108 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
109 .gem_prime_import = drm_gem_prime_import,
110 .gem_prime_export = drm_gem_prime_export,
111 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
112 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
113 .gem_prime_vmap = drm_gem_cma_prime_vmap,
114 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
115 .gem_prime_mmap = drm_gem_cma_prime_mmap,
118 .dumb_create = drm_gem_cma_dumb_create,
119 .gem_free_object_unlocked = drm_gem_cma_free_object,
120 .gem_vm_ops = &drm_gem_cma_vm_ops,
131 static bool meson_vpu_has_available_connectors(struct device *dev)
133 struct device_node *ep, *remote;
135 /* Parses each endpoint and check if remote exists */
136 for_each_endpoint_of_node(dev->of_node, ep) {
137 /* If the endpoint node exists, consider it enabled */
138 remote = of_graph_get_remote_port(ep);
146 static struct regmap_config meson_regmap_config = {
150 .max_register = 0x1000,
153 static int meson_drv_bind_master(struct device *dev, bool has_components)
155 struct platform_device *pdev = to_platform_device(dev);
156 struct meson_drm *priv;
157 struct drm_device *drm;
158 struct resource *res;
162 /* Checks if an output connector is available */
163 if (!meson_vpu_has_available_connectors(dev)) {
164 dev_err(dev, "No output connector available\n");
168 drm = drm_dev_alloc(&meson_driver, dev);
172 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
177 drm->dev_private = priv;
181 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
182 regs = devm_ioremap_resource(dev, res);
188 priv->io_base = regs;
190 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
191 /* Simply ioremap since it may be a shared register zone */
192 regs = devm_ioremap(dev, res->start, resource_size(res));
194 ret = -EADDRNOTAVAIL;
198 priv->hhi = devm_regmap_init_mmio(dev, regs,
199 &meson_regmap_config);
200 if (IS_ERR(priv->hhi)) {
201 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
202 ret = PTR_ERR(priv->hhi);
206 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
207 /* Simply ioremap since it may be a shared register zone */
208 regs = devm_ioremap(dev, res->start, resource_size(res));
210 ret = -EADDRNOTAVAIL;
214 priv->dmc = devm_regmap_init_mmio(dev, regs,
215 &meson_regmap_config);
216 if (IS_ERR(priv->dmc)) {
217 dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
218 ret = PTR_ERR(priv->dmc);
222 priv->vsync_irq = platform_get_irq(pdev, 0);
224 ret = drm_vblank_init(drm, 1);
228 drm_mode_config_init(drm);
229 drm->mode_config.max_width = 3840;
230 drm->mode_config.max_height = 2160;
231 drm->mode_config.funcs = &meson_mode_config_funcs;
233 /* Hardware Initialization */
235 meson_venc_init(priv);
236 meson_vpp_init(priv);
237 meson_viu_init(priv);
239 /* Encoder Initialization */
241 ret = meson_venc_cvbs_create(priv);
245 if (has_components) {
246 ret = component_bind_all(drm->dev, drm);
248 dev_err(drm->dev, "Couldn't bind all components\n");
253 ret = meson_plane_create(priv);
257 ret = meson_crtc_create(priv);
261 ret = drm_irq_install(drm, priv->vsync_irq);
265 drm_mode_config_reset(drm);
267 priv->fbdev = drm_fbdev_cma_init(drm, 32,
268 drm->mode_config.num_connector);
269 if (IS_ERR(priv->fbdev)) {
270 ret = PTR_ERR(priv->fbdev);
274 drm_kms_helper_poll_init(drm);
276 platform_set_drvdata(pdev, priv);
278 ret = drm_dev_register(drm, 0);
285 drm_irq_uninstall(drm);
292 static int meson_drv_bind(struct device *dev)
294 return meson_drv_bind_master(dev, true);
297 static void meson_drv_unbind(struct device *dev)
299 struct meson_drm *priv = dev_get_drvdata(dev);
300 struct drm_device *drm = priv->drm;
302 drm_dev_unregister(drm);
303 drm_irq_uninstall(drm);
304 drm_kms_helper_poll_fini(drm);
305 drm_fbdev_cma_fini(priv->fbdev);
306 drm_mode_config_cleanup(drm);
311 static const struct component_master_ops meson_drv_master_ops = {
312 .bind = meson_drv_bind,
313 .unbind = meson_drv_unbind,
316 static int compare_of(struct device *dev, void *data)
318 DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
321 return dev->of_node == data;
324 /* Possible connectors nodes to ignore */
325 static const struct of_device_id connectors_match[] = {
326 { .compatible = "composite-video-connector" },
327 { .compatible = "svideo-connector" },
328 { .compatible = "hdmi-connector" },
329 { .compatible = "dvi-connector" },
333 static int meson_probe_remote(struct platform_device *pdev,
334 struct component_match **match,
335 struct device_node *parent,
336 struct device_node *remote)
338 struct device_node *ep, *remote_node;
341 /* If node is a connector, return and do not add to match table */
342 if (of_match_node(connectors_match, remote))
345 component_match_add(&pdev->dev, match, compare_of, remote);
347 for_each_endpoint_of_node(remote, ep) {
348 remote_node = of_graph_get_remote_port_parent(ep);
350 remote_node == parent || /* Ignore parent endpoint */
351 !of_device_is_available(remote_node)) {
352 of_node_put(remote_node);
356 count += meson_probe_remote(pdev, match, remote, remote_node);
358 of_node_put(remote_node);
364 static void meson_drv_shutdown(struct platform_device *pdev)
366 struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
371 drm_kms_helper_poll_fini(priv->drm);
372 drm_atomic_helper_shutdown(priv->drm);
375 static int meson_drv_probe(struct platform_device *pdev)
377 struct component_match *match = NULL;
378 struct device_node *np = pdev->dev.of_node;
379 struct device_node *ep, *remote;
382 for_each_endpoint_of_node(np, ep) {
383 remote = of_graph_get_remote_port_parent(ep);
384 if (!remote || !of_device_is_available(remote)) {
389 count += meson_probe_remote(pdev, &match, np, remote);
394 return meson_drv_bind_master(&pdev->dev, false);
396 /* If some endpoints were found, initialize the nodes */
398 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
400 return component_master_add_with_match(&pdev->dev,
401 &meson_drv_master_ops,
405 /* If no output endpoints were available, simply bail out */
409 static const struct of_device_id dt_match[] = {
410 { .compatible = "amlogic,meson-gxbb-vpu" },
411 { .compatible = "amlogic,meson-gxl-vpu" },
412 { .compatible = "amlogic,meson-gxm-vpu" },
415 MODULE_DEVICE_TABLE(of, dt_match);
417 static struct platform_driver meson_drm_platform_driver = {
418 .probe = meson_drv_probe,
419 .shutdown = meson_drv_shutdown,
422 .of_match_table = dt_match,
426 module_platform_driver(meson_drm_platform_driver);
428 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
429 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
430 MODULE_DESCRIPTION(DRIVER_DESC);
431 MODULE_LICENSE("GPL");