2 * Copyright (C) 2016 Marek Vasut <marex@denx.de>
4 * This code is based on drivers/video/fbdev/mxsfb.c :
5 * Copyright (C) 2010 Juergen Beisert, Pengutronix
6 * Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
7 * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
19 #include <linux/module.h>
20 #include <linux/spinlock.h>
21 #include <linux/clk.h>
22 #include <linux/component.h>
23 #include <linux/list.h>
24 #include <linux/of_device.h>
25 #include <linux/of_graph.h>
26 #include <linux/of_reserved_mem.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/reservation.h>
31 #include <drm/drm_atomic.h>
32 #include <drm/drm_atomic_helper.h>
33 #include <drm/drm_crtc.h>
34 #include <drm/drm_crtc_helper.h>
35 #include <drm/drm_fb_helper.h>
36 #include <drm/drm_fb_cma_helper.h>
37 #include <drm/drm_gem_cma_helper.h>
38 #include <drm/drm_of.h>
39 #include <drm/drm_panel.h>
40 #include <drm/drm_simple_kms_helper.h>
42 #include "mxsfb_drv.h"
43 #include "mxsfb_regs.h"
50 static const struct mxsfb_devdata mxsfb_devdata[] = {
52 .transfer_count = LCDC_V3_TRANSFER_COUNT,
53 .cur_buf = LCDC_V3_CUR_BUF,
54 .next_buf = LCDC_V3_NEXT_BUF,
55 .debug0 = LCDC_V3_DEBUG0,
61 .transfer_count = LCDC_V4_TRANSFER_COUNT,
62 .cur_buf = LCDC_V4_CUR_BUF,
63 .next_buf = LCDC_V4_NEXT_BUF,
64 .debug0 = LCDC_V4_DEBUG0,
65 .hs_wdth_mask = 0x3fff,
71 static const uint32_t mxsfb_formats[] = {
76 static struct mxsfb_drm_private *
77 drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
79 return container_of(pipe, struct mxsfb_drm_private, pipe);
82 void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
85 clk_prepare_enable(mxsfb->clk_axi);
88 void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
91 clk_disable_unprepare(mxsfb->clk_axi);
94 static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
95 .fb_create = drm_fb_cma_create,
96 .atomic_check = drm_atomic_helper_check,
97 .atomic_commit = drm_atomic_helper_commit,
100 static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
101 struct drm_crtc_state *crtc_state)
103 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
105 drm_panel_prepare(mxsfb->panel);
106 mxsfb_crtc_enable(mxsfb);
107 drm_panel_enable(mxsfb->panel);
110 static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
112 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
114 drm_panel_disable(mxsfb->panel);
115 mxsfb_crtc_disable(mxsfb);
116 drm_panel_unprepare(mxsfb->panel);
119 static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
120 struct drm_plane_state *plane_state)
122 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
124 mxsfb_plane_atomic_update(mxsfb, plane_state);
127 static int mxsfb_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
128 struct drm_plane_state *plane_state)
130 return drm_fb_cma_prepare_fb(&pipe->plane, plane_state);
133 static struct drm_simple_display_pipe_funcs mxsfb_funcs = {
134 .enable = mxsfb_pipe_enable,
135 .disable = mxsfb_pipe_disable,
136 .update = mxsfb_pipe_update,
137 .prepare_fb = mxsfb_pipe_prepare_fb,
140 static int mxsfb_load(struct drm_device *drm, unsigned long flags)
142 struct platform_device *pdev = to_platform_device(drm->dev);
143 struct mxsfb_drm_private *mxsfb;
144 struct resource *res;
147 mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
151 drm->dev_private = mxsfb;
152 mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];
154 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
155 mxsfb->base = devm_ioremap_resource(drm->dev, res);
156 if (IS_ERR(mxsfb->base))
157 return PTR_ERR(mxsfb->base);
159 mxsfb->clk = devm_clk_get(drm->dev, NULL);
160 if (IS_ERR(mxsfb->clk))
161 return PTR_ERR(mxsfb->clk);
163 mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
164 if (IS_ERR(mxsfb->clk_axi))
165 mxsfb->clk_axi = NULL;
167 mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
168 if (IS_ERR(mxsfb->clk_disp_axi))
169 mxsfb->clk_disp_axi = NULL;
171 ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
175 pm_runtime_enable(drm->dev);
177 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
179 dev_err(drm->dev, "Failed to initialise vblank\n");
184 drm_mode_config_init(drm);
186 ret = mxsfb_create_output(drm);
188 dev_err(drm->dev, "Failed to create outputs\n");
192 ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
193 mxsfb_formats, ARRAY_SIZE(mxsfb_formats),
196 dev_err(drm->dev, "Cannot setup simple display pipe\n");
200 ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
202 dev_err(drm->dev, "Cannot connect panel\n");
206 drm->mode_config.min_width = MXSFB_MIN_XRES;
207 drm->mode_config.min_height = MXSFB_MIN_YRES;
208 drm->mode_config.max_width = MXSFB_MAX_XRES;
209 drm->mode_config.max_height = MXSFB_MAX_YRES;
210 drm->mode_config.funcs = &mxsfb_mode_config_funcs;
212 drm_mode_config_reset(drm);
214 pm_runtime_get_sync(drm->dev);
215 ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
216 pm_runtime_put_sync(drm->dev);
219 dev_err(drm->dev, "Failed to install IRQ handler\n");
223 drm_kms_helper_poll_init(drm);
225 mxsfb->fbdev = drm_fbdev_cma_init(drm, 32,
226 drm->mode_config.num_connector);
227 if (IS_ERR(mxsfb->fbdev)) {
228 ret = PTR_ERR(mxsfb->fbdev);
230 dev_err(drm->dev, "Failed to init FB CMA area\n");
234 platform_set_drvdata(pdev, drm);
236 drm_helper_hpd_irq_event(drm);
241 drm_irq_uninstall(drm);
243 drm_panel_detach(mxsfb->panel);
245 pm_runtime_disable(drm->dev);
250 static void mxsfb_unload(struct drm_device *drm)
252 struct mxsfb_drm_private *mxsfb = drm->dev_private;
255 drm_fbdev_cma_fini(mxsfb->fbdev);
257 drm_kms_helper_poll_fini(drm);
258 drm_mode_config_cleanup(drm);
260 pm_runtime_get_sync(drm->dev);
261 drm_irq_uninstall(drm);
262 pm_runtime_put_sync(drm->dev);
264 drm->dev_private = NULL;
266 pm_runtime_disable(drm->dev);
269 static void mxsfb_lastclose(struct drm_device *drm)
271 struct mxsfb_drm_private *mxsfb = drm->dev_private;
273 drm_fbdev_cma_restore_mode(mxsfb->fbdev);
276 static int mxsfb_enable_vblank(struct drm_device *drm, unsigned int crtc)
278 struct mxsfb_drm_private *mxsfb = drm->dev_private;
280 /* Clear and enable VBLANK IRQ */
281 mxsfb_enable_axi_clk(mxsfb);
282 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
283 writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
284 mxsfb_disable_axi_clk(mxsfb);
289 static void mxsfb_disable_vblank(struct drm_device *drm, unsigned int crtc)
291 struct mxsfb_drm_private *mxsfb = drm->dev_private;
293 /* Disable and clear VBLANK IRQ */
294 mxsfb_enable_axi_clk(mxsfb);
295 writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
296 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
297 mxsfb_disable_axi_clk(mxsfb);
300 static void mxsfb_irq_preinstall(struct drm_device *drm)
302 mxsfb_disable_vblank(drm, 0);
305 static irqreturn_t mxsfb_irq_handler(int irq, void *data)
307 struct drm_device *drm = data;
308 struct mxsfb_drm_private *mxsfb = drm->dev_private;
311 mxsfb_enable_axi_clk(mxsfb);
313 reg = readl(mxsfb->base + LCDC_CTRL1);
315 if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
316 drm_crtc_handle_vblank(&mxsfb->pipe.crtc);
318 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
320 mxsfb_disable_axi_clk(mxsfb);
325 DEFINE_DRM_GEM_CMA_FOPS(fops);
327 static struct drm_driver mxsfb_driver = {
328 .driver_features = DRIVER_GEM | DRIVER_MODESET |
329 DRIVER_PRIME | DRIVER_ATOMIC |
331 .lastclose = mxsfb_lastclose,
332 .irq_handler = mxsfb_irq_handler,
333 .irq_preinstall = mxsfb_irq_preinstall,
334 .irq_uninstall = mxsfb_irq_preinstall,
335 .enable_vblank = mxsfb_enable_vblank,
336 .disable_vblank = mxsfb_disable_vblank,
337 .gem_free_object_unlocked = drm_gem_cma_free_object,
338 .gem_vm_ops = &drm_gem_cma_vm_ops,
339 .dumb_create = drm_gem_cma_dumb_create,
340 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
341 .dumb_destroy = drm_gem_dumb_destroy,
342 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
343 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
344 .gem_prime_export = drm_gem_prime_export,
345 .gem_prime_import = drm_gem_prime_import,
346 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
347 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
348 .gem_prime_vmap = drm_gem_cma_prime_vmap,
349 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
350 .gem_prime_mmap = drm_gem_cma_prime_mmap,
353 .desc = "MXSFB Controller DRM",
359 static const struct platform_device_id mxsfb_devtype[] = {
360 { .name = "imx23-fb", .driver_data = MXSFB_V3, },
361 { .name = "imx28-fb", .driver_data = MXSFB_V4, },
362 { .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
365 MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
367 static const struct of_device_id mxsfb_dt_ids[] = {
368 { .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
369 { .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
370 { .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
373 MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
375 static int mxsfb_probe(struct platform_device *pdev)
377 struct drm_device *drm;
378 const struct of_device_id *of_id =
379 of_match_device(mxsfb_dt_ids, &pdev->dev);
382 if (!pdev->dev.of_node)
386 pdev->id_entry = of_id->data;
388 drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
392 ret = mxsfb_load(drm, 0);
396 ret = drm_dev_register(drm, 0);
410 static int mxsfb_remove(struct platform_device *pdev)
412 struct drm_device *drm = platform_get_drvdata(pdev);
414 drm_dev_unregister(drm);
421 static struct platform_driver mxsfb_platform_driver = {
422 .probe = mxsfb_probe,
423 .remove = mxsfb_remove,
424 .id_table = mxsfb_devtype,
427 .of_match_table = mxsfb_dt_ids,
431 module_platform_driver(mxsfb_platform_driver);
433 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
434 MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
435 MODULE_LICENSE("GPL");