2 * i.MX IPUv3 Graphics driver
4 * Copyright (C) 2011 Sascha Hauer, Pengutronix
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
20 #include <linux/module.h>
21 #include <linux/export.h>
22 #include <linux/device.h>
23 #include <linux/platform_device.h>
25 #include <drm/drm_fb_helper.h>
26 #include <drm/drm_crtc_helper.h>
28 #include <linux/clk.h>
29 #include <drm/drm_gem_cma_helper.h>
30 #include <drm/drm_fb_cma_helper.h>
32 #include "ipu-v3/imx-ipu-v3.h"
35 #define DRIVER_DESC "i.MX IPUv3 Graphics"
37 struct ipu_framebuffer {
38 struct drm_framebuffer base;
45 struct drm_fb_helper fb_helper;
46 struct ipu_framebuffer ifb;
50 struct imx_drm_crtc *imx_crtc;
51 struct ipuv3_channel *ipu_ch;
54 struct dmfc_channel *dmfc;
57 struct ipu_priv *ipu_priv;
58 struct drm_pending_vblank_event *page_flip_event;
59 struct drm_framebuffer *newfb;
61 u32 interface_pix_fmt;
62 unsigned long di_clkflags;
67 #define to_ipu_crtc(x) container_of(x, struct ipu_crtc, base)
69 static int calc_vref(struct drm_display_mode *mode)
71 unsigned long htotal, vtotal;
73 htotal = mode->htotal;
74 vtotal = mode->vtotal;
76 if (!htotal || !vtotal)
79 return mode->clock * 1000 / vtotal / htotal;
82 static int calc_bandwidth(struct drm_display_mode *mode, unsigned int vref)
84 return mode->hdisplay * mode->vdisplay * vref;
87 static void ipu_fb_enable(struct ipu_crtc *ipu_crtc)
89 if (ipu_crtc->enabled)
92 ipu_di_enable(ipu_crtc->di);
93 ipu_dmfc_enable_channel(ipu_crtc->dmfc);
94 ipu_idmac_enable_channel(ipu_crtc->ipu_ch);
95 ipu_dc_enable_channel(ipu_crtc->dc);
97 ipu_dp_enable_channel(ipu_crtc->dp);
99 ipu_crtc->enabled = 1;
102 static void ipu_fb_disable(struct ipu_crtc *ipu_crtc)
104 if (!ipu_crtc->enabled)
108 ipu_dp_disable_channel(ipu_crtc->dp);
109 ipu_dc_disable_channel(ipu_crtc->dc);
110 ipu_idmac_disable_channel(ipu_crtc->ipu_ch);
111 ipu_dmfc_disable_channel(ipu_crtc->dmfc);
112 ipu_di_disable(ipu_crtc->di);
114 ipu_crtc->enabled = 0;
117 static void ipu_crtc_dpms(struct drm_crtc *crtc, int mode)
119 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
121 dev_dbg(ipu_crtc->dev, "%s mode: %d\n", __func__, mode);
124 case DRM_MODE_DPMS_ON:
125 ipu_fb_enable(ipu_crtc);
127 case DRM_MODE_DPMS_STANDBY:
128 case DRM_MODE_DPMS_SUSPEND:
129 case DRM_MODE_DPMS_OFF:
130 ipu_fb_disable(ipu_crtc);
135 static int ipu_page_flip(struct drm_crtc *crtc,
136 struct drm_framebuffer *fb,
137 struct drm_pending_vblank_event *event)
139 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
145 ret = imx_drm_crtc_vblank_get(ipu_crtc->imx_crtc);
147 dev_dbg(ipu_crtc->dev, "failed to acquire vblank counter\n");
148 list_del(&event->base.link);
153 ipu_crtc->newfb = fb;
154 ipu_crtc->page_flip_event = event;
159 static const struct drm_crtc_funcs ipu_crtc_funcs = {
160 .set_config = drm_crtc_helper_set_config,
161 .destroy = drm_crtc_cleanup,
162 .page_flip = ipu_page_flip,
165 static int ipu_drm_set_base(struct drm_crtc *crtc, int x, int y)
167 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
168 struct drm_gem_cma_object *cma_obj;
169 struct drm_framebuffer *fb = crtc->fb;
172 cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
174 DRM_LOG_KMS("entry is null.\n");
178 phys = cma_obj->paddr;
179 phys += x * (fb->bits_per_pixel >> 3);
180 phys += y * fb->pitches[0];
182 dev_dbg(ipu_crtc->dev, "%s: phys: 0x%lx\n", __func__, phys);
183 dev_dbg(ipu_crtc->dev, "%s: xy: %dx%d\n", __func__, x, y);
185 ipu_cpmem_set_stride(ipu_get_cpmem(ipu_crtc->ipu_ch), fb->pitches[0]);
186 ipu_cpmem_set_buffer(ipu_get_cpmem(ipu_crtc->ipu_ch),
192 static int ipu_crtc_mode_set(struct drm_crtc *crtc,
193 struct drm_display_mode *orig_mode,
194 struct drm_display_mode *mode,
196 struct drm_framebuffer *old_fb)
198 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
199 struct drm_framebuffer *fb = ipu_crtc->base.fb;
201 struct ipu_di_signal_cfg sig_cfg = {};
203 struct ipu_ch_param __iomem *cpmem = ipu_get_cpmem(ipu_crtc->ipu_ch);
207 dev_dbg(ipu_crtc->dev, "%s: mode->hdisplay: %d\n", __func__,
209 dev_dbg(ipu_crtc->dev, "%s: mode->vdisplay: %d\n", __func__,
212 ipu_ch_param_zero(cpmem);
214 switch (fb->pixel_format) {
215 case DRM_FORMAT_XRGB8888:
216 case DRM_FORMAT_ARGB8888:
217 v4l2_fmt = V4L2_PIX_FMT_RGB32;
220 case DRM_FORMAT_RGB565:
221 v4l2_fmt = V4L2_PIX_FMT_RGB565;
224 case DRM_FORMAT_RGB888:
225 v4l2_fmt = V4L2_PIX_FMT_RGB24;
229 dev_err(ipu_crtc->dev, "unsupported pixel format 0x%08x\n",
234 out_pixel_fmt = ipu_crtc->interface_pix_fmt;
236 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
237 sig_cfg.interlaced = 1;
238 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
239 sig_cfg.Hsync_pol = 1;
240 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
241 sig_cfg.Vsync_pol = 1;
243 sig_cfg.enable_pol = 1;
245 sig_cfg.width = mode->hdisplay;
246 sig_cfg.height = mode->vdisplay;
247 sig_cfg.pixel_fmt = out_pixel_fmt;
248 sig_cfg.h_start_width = mode->htotal - mode->hsync_end;
249 sig_cfg.h_sync_width = mode->hsync_end - mode->hsync_start;
250 sig_cfg.h_end_width = mode->hsync_start - mode->hdisplay;
252 sig_cfg.v_start_width = mode->vtotal - mode->vsync_end;
253 sig_cfg.v_sync_width = mode->vsync_end - mode->vsync_start;
254 sig_cfg.v_end_width = mode->vsync_start - mode->vdisplay;
255 sig_cfg.pixelclock = mode->clock * 1000;
256 sig_cfg.clkflags = ipu_crtc->di_clkflags;
258 sig_cfg.v_to_h_sync = 0;
260 sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
261 sig_cfg.vsync_pin = ipu_crtc->di_vsync_pin;
264 ret = ipu_dp_setup_channel(ipu_crtc->dp, IPUV3_COLORSPACE_RGB,
265 IPUV3_COLORSPACE_RGB);
267 dev_err(ipu_crtc->dev,
268 "initializing display processor failed with %d\n",
272 ipu_dp_set_global_alpha(ipu_crtc->dp, 1, 0, 1);
275 ret = ipu_dc_init_sync(ipu_crtc->dc, ipu_crtc->di, sig_cfg.interlaced,
276 out_pixel_fmt, mode->hdisplay);
278 dev_err(ipu_crtc->dev,
279 "initializing display controller failed with %d\n",
284 ret = ipu_di_init_sync_panel(ipu_crtc->di, &sig_cfg);
286 dev_err(ipu_crtc->dev,
287 "initializing panel failed with %d\n", ret);
291 ipu_cpmem_set_resolution(cpmem, mode->hdisplay, mode->vdisplay);
292 ipu_cpmem_set_fmt(cpmem, v4l2_fmt);
293 ipu_cpmem_set_high_priority(ipu_crtc->ipu_ch);
295 ret = ipu_dmfc_init_channel(ipu_crtc->dmfc, mode->hdisplay);
297 dev_err(ipu_crtc->dev,
298 "initializing dmfc channel failed with %d\n",
303 ret = ipu_dmfc_alloc_bandwidth(ipu_crtc->dmfc,
304 calc_bandwidth(mode, calc_vref(mode)), 64);
306 dev_err(ipu_crtc->dev,
307 "allocating dmfc bandwidth failed with %d\n",
312 ipu_drm_set_base(crtc, x, y);
317 static void ipu_crtc_handle_pageflip(struct ipu_crtc *ipu_crtc)
320 struct drm_device *drm = ipu_crtc->base.dev;
322 spin_lock_irqsave(&drm->event_lock, flags);
323 if (ipu_crtc->page_flip_event)
324 drm_send_vblank_event(drm, -1, ipu_crtc->page_flip_event);
325 ipu_crtc->page_flip_event = NULL;
326 imx_drm_crtc_vblank_put(ipu_crtc->imx_crtc);
327 spin_unlock_irqrestore(&drm->event_lock, flags);
330 static irqreturn_t ipu_irq_handler(int irq, void *dev_id)
332 struct ipu_crtc *ipu_crtc = dev_id;
334 imx_drm_handle_vblank(ipu_crtc->imx_crtc);
336 if (ipu_crtc->newfb) {
337 ipu_crtc->base.fb = ipu_crtc->newfb;
338 ipu_crtc->newfb = NULL;
339 ipu_drm_set_base(&ipu_crtc->base, 0, 0);
340 ipu_crtc_handle_pageflip(ipu_crtc);
346 static bool ipu_crtc_mode_fixup(struct drm_crtc *crtc,
347 const struct drm_display_mode *mode,
348 struct drm_display_mode *adjusted_mode)
353 static void ipu_crtc_prepare(struct drm_crtc *crtc)
355 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
357 ipu_fb_disable(ipu_crtc);
360 static void ipu_crtc_commit(struct drm_crtc *crtc)
362 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
364 ipu_fb_enable(ipu_crtc);
367 static void ipu_crtc_load_lut(struct drm_crtc *crtc)
371 static struct drm_crtc_helper_funcs ipu_helper_funcs = {
372 .dpms = ipu_crtc_dpms,
373 .mode_fixup = ipu_crtc_mode_fixup,
374 .mode_set = ipu_crtc_mode_set,
375 .prepare = ipu_crtc_prepare,
376 .commit = ipu_crtc_commit,
377 .load_lut = ipu_crtc_load_lut,
380 static int ipu_enable_vblank(struct drm_crtc *crtc)
382 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
384 enable_irq(ipu_crtc->irq);
389 static void ipu_disable_vblank(struct drm_crtc *crtc)
391 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
393 disable_irq(ipu_crtc->irq);
396 static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type,
397 u32 pixfmt, int hsync_pin, int vsync_pin)
399 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
401 ipu_crtc->interface_pix_fmt = pixfmt;
402 ipu_crtc->di_hsync_pin = hsync_pin;
403 ipu_crtc->di_vsync_pin = vsync_pin;
405 switch (encoder_type) {
406 case DRM_MODE_ENCODER_DAC:
407 case DRM_MODE_ENCODER_TVDAC:
408 case DRM_MODE_ENCODER_LVDS:
409 ipu_crtc->di_clkflags = IPU_DI_CLKMODE_SYNC |
412 case DRM_MODE_ENCODER_NONE:
413 ipu_crtc->di_clkflags = 0;
420 static const struct imx_drm_crtc_helper_funcs ipu_crtc_helper_funcs = {
421 .enable_vblank = ipu_enable_vblank,
422 .disable_vblank = ipu_disable_vblank,
423 .set_interface_pix_fmt = ipu_set_interface_pix_fmt,
424 .crtc_funcs = &ipu_crtc_funcs,
425 .crtc_helper_funcs = &ipu_helper_funcs,
428 static void ipu_put_resources(struct ipu_crtc *ipu_crtc)
430 if (!IS_ERR_OR_NULL(ipu_crtc->ipu_ch))
431 ipu_idmac_put(ipu_crtc->ipu_ch);
432 if (!IS_ERR_OR_NULL(ipu_crtc->dmfc))
433 ipu_dmfc_put(ipu_crtc->dmfc);
434 if (!IS_ERR_OR_NULL(ipu_crtc->dp))
435 ipu_dp_put(ipu_crtc->dp);
436 if (!IS_ERR_OR_NULL(ipu_crtc->di))
437 ipu_di_put(ipu_crtc->di);
440 static int ipu_get_resources(struct ipu_crtc *ipu_crtc,
441 struct ipu_client_platformdata *pdata)
443 struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
446 ipu_crtc->ipu_ch = ipu_idmac_get(ipu, pdata->dma[0]);
447 if (IS_ERR(ipu_crtc->ipu_ch)) {
448 ret = PTR_ERR(ipu_crtc->ipu_ch);
452 ipu_crtc->dc = ipu_dc_get(ipu, pdata->dc);
453 if (IS_ERR(ipu_crtc->dc)) {
454 ret = PTR_ERR(ipu_crtc->dc);
458 ipu_crtc->dmfc = ipu_dmfc_get(ipu, pdata->dma[0]);
459 if (IS_ERR(ipu_crtc->dmfc)) {
460 ret = PTR_ERR(ipu_crtc->dmfc);
464 if (pdata->dp >= 0) {
465 ipu_crtc->dp = ipu_dp_get(ipu, pdata->dp);
466 if (IS_ERR(ipu_crtc->dp)) {
467 ret = PTR_ERR(ipu_crtc->dp);
472 ipu_crtc->di = ipu_di_get(ipu, pdata->di);
473 if (IS_ERR(ipu_crtc->di)) {
474 ret = PTR_ERR(ipu_crtc->di);
480 ipu_put_resources(ipu_crtc);
485 static int ipu_crtc_init(struct ipu_crtc *ipu_crtc,
486 struct ipu_client_platformdata *pdata)
488 struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
491 ret = ipu_get_resources(ipu_crtc, pdata);
493 dev_err(ipu_crtc->dev, "getting resources failed with %d.\n",
498 ret = imx_drm_add_crtc(&ipu_crtc->base,
500 &ipu_crtc_helper_funcs, THIS_MODULE,
501 ipu_crtc->dev->parent->of_node, pdata->di);
503 dev_err(ipu_crtc->dev, "adding crtc failed with %d.\n", ret);
504 goto err_put_resources;
507 ipu_crtc->irq = ipu_idmac_channel_irq(ipu, ipu_crtc->ipu_ch,
509 ret = devm_request_irq(ipu_crtc->dev, ipu_crtc->irq, ipu_irq_handler, 0,
510 "imx_drm", ipu_crtc);
512 dev_err(ipu_crtc->dev, "irq request failed with %d.\n", ret);
513 goto err_put_resources;
516 disable_irq(ipu_crtc->irq);
521 ipu_put_resources(ipu_crtc);
526 static int ipu_drm_probe(struct platform_device *pdev)
528 struct ipu_client_platformdata *pdata = pdev->dev.platform_data;
529 struct ipu_crtc *ipu_crtc;
535 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
537 ipu_crtc = devm_kzalloc(&pdev->dev, sizeof(*ipu_crtc), GFP_KERNEL);
541 ipu_crtc->dev = &pdev->dev;
543 ret = ipu_crtc_init(ipu_crtc, pdata);
547 platform_set_drvdata(pdev, ipu_crtc);
552 static int ipu_drm_remove(struct platform_device *pdev)
554 struct ipu_crtc *ipu_crtc = platform_get_drvdata(pdev);
556 imx_drm_remove_crtc(ipu_crtc->imx_crtc);
558 ipu_put_resources(ipu_crtc);
563 static struct platform_driver ipu_drm_driver = {
565 .name = "imx-ipuv3-crtc",
567 .probe = ipu_drm_probe,
568 .remove = ipu_drm_remove,
570 module_platform_driver(ipu_drm_driver);
572 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
573 MODULE_DESCRIPTION(DRIVER_DESC);
574 MODULE_LICENSE("GPL");