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_fb_cma_helper.h>
34 #include <drm/drm_fb_helper.h>
35 #include <drm/drm_flip_work.h>
36 #include <drm/drm_gem_cma_helper.h>
37 #include <drm/drm_gem_framebuffer_helper.h>
38 #include <drm/drm_plane_helper.h>
39 #include <drm/drm_probe_helper.h>
40 #include <drm/drm_rect.h>
42 #include "meson_drv.h"
43 #include "meson_plane.h"
44 #include "meson_overlay.h"
45 #include "meson_crtc.h"
46 #include "meson_venc_cvbs.h"
48 #include "meson_vpp.h"
49 #include "meson_viu.h"
50 #include "meson_venc.h"
51 #include "meson_canvas.h"
52 #include "meson_registers.h"
54 #define DRIVER_NAME "meson"
55 #define DRIVER_DESC "Amlogic Meson DRM driver"
58 * DOC: Video Processing Unit
60 * VPU Handles the Global Video Processing, it includes management of the
61 * clocks gates, blocks reset lines and power domains.
65 * - Full reset of entire video processing HW blocks
66 * - Scaling and setup of the VPU clock
68 * - Powering up video processing HW blocks
69 * - Powering Up HDMI controller and PHY
72 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
73 .atomic_check = drm_atomic_helper_check,
74 .atomic_commit = drm_atomic_helper_commit,
75 .fb_create = drm_gem_fb_create,
78 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
79 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
82 static irqreturn_t meson_irq(int irq, void *arg)
84 struct drm_device *dev = arg;
85 struct meson_drm *priv = dev->dev_private;
87 (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
94 DEFINE_DRM_GEM_CMA_FOPS(fops);
96 static struct drm_driver meson_driver = {
97 .driver_features = DRIVER_GEM |
98 DRIVER_MODESET | DRIVER_PRIME |
102 .irq_handler = meson_irq,
105 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
106 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
107 .gem_prime_import = drm_gem_prime_import,
108 .gem_prime_export = drm_gem_prime_export,
109 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
110 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
111 .gem_prime_vmap = drm_gem_cma_prime_vmap,
112 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
113 .gem_prime_mmap = drm_gem_cma_prime_mmap,
116 .dumb_create = drm_gem_cma_dumb_create,
117 .gem_free_object_unlocked = drm_gem_cma_free_object,
118 .gem_vm_ops = &drm_gem_cma_vm_ops,
129 static bool meson_vpu_has_available_connectors(struct device *dev)
131 struct device_node *ep, *remote;
133 /* Parses each endpoint and check if remote exists */
134 for_each_endpoint_of_node(dev->of_node, ep) {
135 /* If the endpoint node exists, consider it enabled */
136 remote = of_graph_get_remote_port(ep);
144 static struct regmap_config meson_regmap_config = {
148 .max_register = 0x1000,
151 static void meson_vpu_init(struct meson_drm *priv)
153 writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
154 writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
155 writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
156 writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
159 static void meson_remove_framebuffers(void)
161 struct apertures_struct *ap;
163 ap = alloc_apertures(1);
167 /* The framebuffer can be located anywhere in RAM */
168 ap->ranges[0].base = 0;
169 ap->ranges[0].size = ~0;
171 drm_fb_helper_remove_conflicting_framebuffers(ap, "meson-drm-fb",
176 static int meson_drv_bind_master(struct device *dev, bool has_components)
178 struct platform_device *pdev = to_platform_device(dev);
179 struct meson_drm *priv;
180 struct drm_device *drm;
181 struct resource *res;
185 /* Checks if an output connector is available */
186 if (!meson_vpu_has_available_connectors(dev)) {
187 dev_err(dev, "No output connector available\n");
191 drm = drm_dev_alloc(&meson_driver, dev);
195 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
200 drm->dev_private = priv;
204 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
205 regs = devm_ioremap_resource(dev, res);
211 priv->io_base = regs;
213 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
218 /* Simply ioremap since it may be a shared register zone */
219 regs = devm_ioremap(dev, res->start, resource_size(res));
221 ret = -EADDRNOTAVAIL;
225 priv->hhi = devm_regmap_init_mmio(dev, regs,
226 &meson_regmap_config);
227 if (IS_ERR(priv->hhi)) {
228 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
229 ret = PTR_ERR(priv->hhi);
233 priv->canvas = meson_canvas_get(dev);
234 if (!IS_ERR(priv->canvas)) {
235 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
238 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
240 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
243 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
245 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
246 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
249 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
251 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
252 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
253 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
259 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
264 /* Simply ioremap since it may be a shared register zone */
265 regs = devm_ioremap(dev, res->start, resource_size(res));
267 ret = -EADDRNOTAVAIL;
271 priv->dmc = devm_regmap_init_mmio(dev, regs,
272 &meson_regmap_config);
273 if (IS_ERR(priv->dmc)) {
274 dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
275 ret = PTR_ERR(priv->dmc);
280 priv->vsync_irq = platform_get_irq(pdev, 0);
282 ret = drm_vblank_init(drm, 1);
286 /* Remove early framebuffers (ie. simplefb) */
287 meson_remove_framebuffers();
289 drm_mode_config_init(drm);
290 drm->mode_config.max_width = 3840;
291 drm->mode_config.max_height = 2160;
292 drm->mode_config.funcs = &meson_mode_config_funcs;
293 drm->mode_config.helper_private = &meson_mode_config_helpers;
295 /* Hardware Initialization */
297 meson_vpu_init(priv);
298 meson_venc_init(priv);
299 meson_vpp_init(priv);
300 meson_viu_init(priv);
302 /* Encoder Initialization */
304 ret = meson_venc_cvbs_create(priv);
308 if (has_components) {
309 ret = component_bind_all(drm->dev, drm);
311 dev_err(drm->dev, "Couldn't bind all components\n");
316 ret = meson_plane_create(priv);
320 ret = meson_overlay_create(priv);
324 ret = meson_crtc_create(priv);
328 ret = drm_irq_install(drm, priv->vsync_irq);
332 drm_mode_config_reset(drm);
334 drm_kms_helper_poll_init(drm);
336 platform_set_drvdata(pdev, priv);
338 ret = drm_dev_register(drm, 0);
342 drm_fbdev_generic_setup(drm, 32);
352 static int meson_drv_bind(struct device *dev)
354 return meson_drv_bind_master(dev, true);
357 static void meson_drv_unbind(struct device *dev)
359 struct drm_device *drm = dev_get_drvdata(dev);
360 struct meson_drm *priv = drm->dev_private;
363 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
364 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
365 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
366 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
369 drm_dev_unregister(drm);
370 drm_kms_helper_poll_fini(drm);
371 drm_mode_config_cleanup(drm);
376 static const struct component_master_ops meson_drv_master_ops = {
377 .bind = meson_drv_bind,
378 .unbind = meson_drv_unbind,
381 static int compare_of(struct device *dev, void *data)
383 DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
386 return dev->of_node == data;
389 /* Possible connectors nodes to ignore */
390 static const struct of_device_id connectors_match[] = {
391 { .compatible = "composite-video-connector" },
392 { .compatible = "svideo-connector" },
393 { .compatible = "hdmi-connector" },
394 { .compatible = "dvi-connector" },
398 static int meson_probe_remote(struct platform_device *pdev,
399 struct component_match **match,
400 struct device_node *parent,
401 struct device_node *remote)
403 struct device_node *ep, *remote_node;
406 /* If node is a connector, return and do not add to match table */
407 if (of_match_node(connectors_match, remote))
410 component_match_add(&pdev->dev, match, compare_of, remote);
412 for_each_endpoint_of_node(remote, ep) {
413 remote_node = of_graph_get_remote_port_parent(ep);
415 remote_node == parent || /* Ignore parent endpoint */
416 !of_device_is_available(remote_node)) {
417 of_node_put(remote_node);
421 count += meson_probe_remote(pdev, match, remote, remote_node);
423 of_node_put(remote_node);
429 static int meson_drv_probe(struct platform_device *pdev)
431 struct component_match *match = NULL;
432 struct device_node *np = pdev->dev.of_node;
433 struct device_node *ep, *remote;
436 for_each_endpoint_of_node(np, ep) {
437 remote = of_graph_get_remote_port_parent(ep);
438 if (!remote || !of_device_is_available(remote)) {
443 count += meson_probe_remote(pdev, &match, np, remote);
448 return meson_drv_bind_master(&pdev->dev, false);
450 /* If some endpoints were found, initialize the nodes */
452 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
454 return component_master_add_with_match(&pdev->dev,
455 &meson_drv_master_ops,
459 /* If no output endpoints were available, simply bail out */
463 static const struct of_device_id dt_match[] = {
464 { .compatible = "amlogic,meson-gxbb-vpu" },
465 { .compatible = "amlogic,meson-gxl-vpu" },
466 { .compatible = "amlogic,meson-gxm-vpu" },
469 MODULE_DEVICE_TABLE(of, dt_match);
471 static struct platform_driver meson_drm_platform_driver = {
472 .probe = meson_drv_probe,
475 .of_match_table = dt_match,
479 module_platform_driver(meson_drm_platform_driver);
481 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
482 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
483 MODULE_DESCRIPTION(DRIVER_DESC);
484 MODULE_LICENSE("GPL");