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 #include <linux/component.h>
16 #include <linux/module.h>
17 #include <linux/export.h>
18 #include <linux/device.h>
19 #include <linux/platform_device.h>
21 #include <drm/drm_atomic.h>
22 #include <drm/drm_atomic_helper.h>
23 #include <drm/drm_crtc_helper.h>
25 #include <linux/clk.h>
26 #include <linux/errno.h>
27 #include <drm/drm_gem_cma_helper.h>
28 #include <drm/drm_fb_cma_helper.h>
30 #include <video/imx-ipu-v3.h>
32 #include "ipuv3-plane.h"
34 #define DRIVER_DESC "i.MX IPUv3 Graphics"
39 struct imx_drm_crtc
*imx_crtc
;
41 /* plane[0] is the full plane, plane[1] is the partial plane */
42 struct ipu_plane
*plane
[2];
49 static inline struct ipu_crtc
*to_ipu_crtc(struct drm_crtc
*crtc
)
51 return container_of(crtc
, struct ipu_crtc
, base
);
54 static void ipu_crtc_enable(struct drm_crtc
*crtc
)
56 struct ipu_crtc
*ipu_crtc
= to_ipu_crtc(crtc
);
57 struct ipu_soc
*ipu
= dev_get_drvdata(ipu_crtc
->dev
->parent
);
60 ipu_dc_enable_channel(ipu_crtc
->dc
);
61 ipu_di_enable(ipu_crtc
->di
);
64 static void ipu_crtc_disable(struct drm_crtc
*crtc
)
66 struct ipu_crtc
*ipu_crtc
= to_ipu_crtc(crtc
);
67 struct ipu_soc
*ipu
= dev_get_drvdata(ipu_crtc
->dev
->parent
);
69 ipu_dc_disable_channel(ipu_crtc
->dc
);
70 ipu_di_disable(ipu_crtc
->di
);
73 spin_lock_irq(&crtc
->dev
->event_lock
);
74 if (crtc
->state
->event
) {
75 drm_crtc_send_vblank_event(crtc
, crtc
->state
->event
);
76 crtc
->state
->event
= NULL
;
78 spin_unlock_irq(&crtc
->dev
->event_lock
);
81 static void imx_drm_crtc_reset(struct drm_crtc
*crtc
)
83 struct imx_crtc_state
*state
;
86 if (crtc
->state
->mode_blob
)
87 drm_property_unreference_blob(crtc
->state
->mode_blob
);
89 state
= to_imx_crtc_state(crtc
->state
);
90 memset(state
, 0, sizeof(*state
));
92 state
= kzalloc(sizeof(*state
), GFP_KERNEL
);
95 crtc
->state
= &state
->base
;
98 state
->base
.crtc
= crtc
;
101 static struct drm_crtc_state
*imx_drm_crtc_duplicate_state(struct drm_crtc
*crtc
)
103 struct imx_crtc_state
*state
;
105 state
= kzalloc(sizeof(*state
), GFP_KERNEL
);
109 __drm_atomic_helper_crtc_duplicate_state(crtc
, &state
->base
);
111 WARN_ON(state
->base
.crtc
!= crtc
);
112 state
->base
.crtc
= crtc
;
117 static void imx_drm_crtc_destroy_state(struct drm_crtc
*crtc
,
118 struct drm_crtc_state
*state
)
120 __drm_atomic_helper_crtc_destroy_state(state
);
121 kfree(to_imx_crtc_state(state
));
124 static const struct drm_crtc_funcs ipu_crtc_funcs
= {
125 .set_config
= drm_atomic_helper_set_config
,
126 .destroy
= drm_crtc_cleanup
,
127 .page_flip
= drm_atomic_helper_page_flip
,
128 .reset
= imx_drm_crtc_reset
,
129 .atomic_duplicate_state
= imx_drm_crtc_duplicate_state
,
130 .atomic_destroy_state
= imx_drm_crtc_destroy_state
,
133 static irqreturn_t
ipu_irq_handler(int irq
, void *dev_id
)
135 struct ipu_crtc
*ipu_crtc
= dev_id
;
137 imx_drm_handle_vblank(ipu_crtc
->imx_crtc
);
142 static bool ipu_crtc_mode_fixup(struct drm_crtc
*crtc
,
143 const struct drm_display_mode
*mode
,
144 struct drm_display_mode
*adjusted_mode
)
146 struct ipu_crtc
*ipu_crtc
= to_ipu_crtc(crtc
);
150 drm_display_mode_to_videomode(adjusted_mode
, &vm
);
152 ret
= ipu_di_adjust_videomode(ipu_crtc
->di
, &vm
);
156 if ((vm
.vsync_len
== 0) || (vm
.hsync_len
== 0))
159 drm_display_mode_from_videomode(&vm
, adjusted_mode
);
164 static int ipu_crtc_atomic_check(struct drm_crtc
*crtc
,
165 struct drm_crtc_state
*state
)
167 u32 primary_plane_mask
= 1 << drm_plane_index(crtc
->primary
);
169 if (state
->active
&& (primary_plane_mask
& state
->plane_mask
) == 0)
175 static void ipu_crtc_atomic_begin(struct drm_crtc
*crtc
,
176 struct drm_crtc_state
*old_crtc_state
)
178 spin_lock_irq(&crtc
->dev
->event_lock
);
179 if (crtc
->state
->event
) {
180 WARN_ON(drm_crtc_vblank_get(crtc
));
181 drm_crtc_arm_vblank_event(crtc
, crtc
->state
->event
);
182 crtc
->state
->event
= NULL
;
184 spin_unlock_irq(&crtc
->dev
->event_lock
);
187 static void ipu_crtc_mode_set_nofb(struct drm_crtc
*crtc
)
189 struct drm_device
*dev
= crtc
->dev
;
190 struct drm_encoder
*encoder
;
191 struct ipu_crtc
*ipu_crtc
= to_ipu_crtc(crtc
);
192 struct drm_display_mode
*mode
= &crtc
->state
->adjusted_mode
;
193 struct imx_crtc_state
*imx_crtc_state
= to_imx_crtc_state(crtc
->state
);
194 struct ipu_di_signal_cfg sig_cfg
= {};
195 unsigned long encoder_types
= 0;
197 dev_dbg(ipu_crtc
->dev
, "%s: mode->hdisplay: %d\n", __func__
,
199 dev_dbg(ipu_crtc
->dev
, "%s: mode->vdisplay: %d\n", __func__
,
202 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
203 if (encoder
->crtc
== crtc
)
204 encoder_types
|= BIT(encoder
->encoder_type
);
207 dev_dbg(ipu_crtc
->dev
, "%s: attached to encoder types 0x%lx\n",
208 __func__
, encoder_types
);
211 * If we have DAC or LDB, then we need the IPU DI clock to be
212 * the same as the LDB DI clock. For TVDAC, derive the IPU DI
213 * clock from 27 MHz TVE_DI clock, but allow to divide it.
215 if (encoder_types
& (BIT(DRM_MODE_ENCODER_DAC
) |
216 BIT(DRM_MODE_ENCODER_LVDS
)))
217 sig_cfg
.clkflags
= IPU_DI_CLKMODE_SYNC
| IPU_DI_CLKMODE_EXT
;
218 else if (encoder_types
& BIT(DRM_MODE_ENCODER_TVDAC
))
219 sig_cfg
.clkflags
= IPU_DI_CLKMODE_EXT
;
221 sig_cfg
.clkflags
= 0;
223 sig_cfg
.enable_pol
= !(imx_crtc_state
->bus_flags
& DRM_BUS_FLAG_DE_LOW
);
224 /* Default to driving pixel data on negative clock edges */
225 sig_cfg
.clk_pol
= !!(imx_crtc_state
->bus_flags
&
226 DRM_BUS_FLAG_PIXDATA_POSEDGE
);
227 sig_cfg
.bus_format
= imx_crtc_state
->bus_format
;
228 sig_cfg
.v_to_h_sync
= 0;
229 sig_cfg
.hsync_pin
= imx_crtc_state
->di_hsync_pin
;
230 sig_cfg
.vsync_pin
= imx_crtc_state
->di_vsync_pin
;
232 drm_display_mode_to_videomode(mode
, &sig_cfg
.mode
);
234 ipu_dc_init_sync(ipu_crtc
->dc
, ipu_crtc
->di
,
235 mode
->flags
& DRM_MODE_FLAG_INTERLACE
,
236 imx_crtc_state
->bus_format
, mode
->hdisplay
);
237 ipu_di_init_sync_panel(ipu_crtc
->di
, &sig_cfg
);
240 static const struct drm_crtc_helper_funcs ipu_helper_funcs
= {
241 .mode_fixup
= ipu_crtc_mode_fixup
,
242 .mode_set_nofb
= ipu_crtc_mode_set_nofb
,
243 .atomic_check
= ipu_crtc_atomic_check
,
244 .atomic_begin
= ipu_crtc_atomic_begin
,
245 .disable
= ipu_crtc_disable
,
246 .enable
= ipu_crtc_enable
,
249 static int ipu_enable_vblank(struct drm_crtc
*crtc
)
251 struct ipu_crtc
*ipu_crtc
= to_ipu_crtc(crtc
);
253 enable_irq(ipu_crtc
->irq
);
258 static void ipu_disable_vblank(struct drm_crtc
*crtc
)
260 struct ipu_crtc
*ipu_crtc
= to_ipu_crtc(crtc
);
262 disable_irq_nosync(ipu_crtc
->irq
);
265 static const struct imx_drm_crtc_helper_funcs ipu_crtc_helper_funcs
= {
266 .enable_vblank
= ipu_enable_vblank
,
267 .disable_vblank
= ipu_disable_vblank
,
268 .crtc_funcs
= &ipu_crtc_funcs
,
269 .crtc_helper_funcs
= &ipu_helper_funcs
,
272 static void ipu_put_resources(struct ipu_crtc
*ipu_crtc
)
274 if (!IS_ERR_OR_NULL(ipu_crtc
->dc
))
275 ipu_dc_put(ipu_crtc
->dc
);
276 if (!IS_ERR_OR_NULL(ipu_crtc
->di
))
277 ipu_di_put(ipu_crtc
->di
);
280 static int ipu_get_resources(struct ipu_crtc
*ipu_crtc
,
281 struct ipu_client_platformdata
*pdata
)
283 struct ipu_soc
*ipu
= dev_get_drvdata(ipu_crtc
->dev
->parent
);
286 ipu_crtc
->dc
= ipu_dc_get(ipu
, pdata
->dc
);
287 if (IS_ERR(ipu_crtc
->dc
)) {
288 ret
= PTR_ERR(ipu_crtc
->dc
);
292 ipu_crtc
->di
= ipu_di_get(ipu
, pdata
->di
);
293 if (IS_ERR(ipu_crtc
->di
)) {
294 ret
= PTR_ERR(ipu_crtc
->di
);
300 ipu_put_resources(ipu_crtc
);
305 static int ipu_crtc_init(struct ipu_crtc
*ipu_crtc
,
306 struct ipu_client_platformdata
*pdata
, struct drm_device
*drm
)
308 struct ipu_soc
*ipu
= dev_get_drvdata(ipu_crtc
->dev
->parent
);
312 ret
= ipu_get_resources(ipu_crtc
, pdata
);
314 dev_err(ipu_crtc
->dev
, "getting resources failed with %d.\n",
320 dp
= IPU_DP_FLOW_SYNC_BG
;
321 ipu_crtc
->plane
[0] = ipu_plane_init(drm
, ipu
, pdata
->dma
[0], dp
, 0,
322 DRM_PLANE_TYPE_PRIMARY
);
323 if (IS_ERR(ipu_crtc
->plane
[0])) {
324 ret
= PTR_ERR(ipu_crtc
->plane
[0]);
325 goto err_put_resources
;
328 ret
= imx_drm_add_crtc(drm
, &ipu_crtc
->base
, &ipu_crtc
->imx_crtc
,
329 &ipu_crtc
->plane
[0]->base
, &ipu_crtc_helper_funcs
,
332 dev_err(ipu_crtc
->dev
, "adding crtc failed with %d.\n", ret
);
333 goto err_put_resources
;
336 ret
= ipu_plane_get_resources(ipu_crtc
->plane
[0]);
338 dev_err(ipu_crtc
->dev
, "getting plane 0 resources failed with %d.\n",
340 goto err_remove_crtc
;
343 /* If this crtc is using the DP, add an overlay plane */
344 if (pdata
->dp
>= 0 && pdata
->dma
[1] > 0) {
345 ipu_crtc
->plane
[1] = ipu_plane_init(drm
, ipu
, pdata
->dma
[1],
347 drm_crtc_mask(&ipu_crtc
->base
),
348 DRM_PLANE_TYPE_OVERLAY
);
349 if (IS_ERR(ipu_crtc
->plane
[1])) {
350 ipu_crtc
->plane
[1] = NULL
;
352 ret
= ipu_plane_get_resources(ipu_crtc
->plane
[1]);
354 dev_err(ipu_crtc
->dev
, "getting plane 1 "
355 "resources failed with %d.\n", ret
);
356 goto err_put_plane0_res
;
361 ipu_crtc
->irq
= ipu_plane_irq(ipu_crtc
->plane
[0]);
362 ret
= devm_request_irq(ipu_crtc
->dev
, ipu_crtc
->irq
, ipu_irq_handler
, 0,
363 "imx_drm", ipu_crtc
);
365 dev_err(ipu_crtc
->dev
, "irq request failed with %d.\n", ret
);
366 goto err_put_plane1_res
;
368 /* Only enable IRQ when we actually need it to trigger work. */
369 disable_irq(ipu_crtc
->irq
);
374 if (ipu_crtc
->plane
[1])
375 ipu_plane_put_resources(ipu_crtc
->plane
[1]);
377 ipu_plane_put_resources(ipu_crtc
->plane
[0]);
379 imx_drm_remove_crtc(ipu_crtc
->imx_crtc
);
381 ipu_put_resources(ipu_crtc
);
386 static int ipu_drm_bind(struct device
*dev
, struct device
*master
, void *data
)
388 struct ipu_client_platformdata
*pdata
= dev
->platform_data
;
389 struct drm_device
*drm
= data
;
390 struct ipu_crtc
*ipu_crtc
;
393 ipu_crtc
= devm_kzalloc(dev
, sizeof(*ipu_crtc
), GFP_KERNEL
);
399 ret
= ipu_crtc_init(ipu_crtc
, pdata
, drm
);
403 dev_set_drvdata(dev
, ipu_crtc
);
408 static void ipu_drm_unbind(struct device
*dev
, struct device
*master
,
411 struct ipu_crtc
*ipu_crtc
= dev_get_drvdata(dev
);
413 imx_drm_remove_crtc(ipu_crtc
->imx_crtc
);
415 ipu_put_resources(ipu_crtc
);
416 if (ipu_crtc
->plane
[1])
417 ipu_plane_put_resources(ipu_crtc
->plane
[1]);
418 ipu_plane_put_resources(ipu_crtc
->plane
[0]);
421 static const struct component_ops ipu_crtc_ops
= {
422 .bind
= ipu_drm_bind
,
423 .unbind
= ipu_drm_unbind
,
426 static int ipu_drm_probe(struct platform_device
*pdev
)
428 struct device
*dev
= &pdev
->dev
;
431 if (!dev
->platform_data
)
434 ret
= dma_set_coherent_mask(dev
, DMA_BIT_MASK(32));
438 return component_add(dev
, &ipu_crtc_ops
);
441 static int ipu_drm_remove(struct platform_device
*pdev
)
443 component_del(&pdev
->dev
, &ipu_crtc_ops
);
447 static struct platform_driver ipu_drm_driver
= {
449 .name
= "imx-ipuv3-crtc",
451 .probe
= ipu_drm_probe
,
452 .remove
= ipu_drm_remove
,
454 module_platform_driver(ipu_drm_driver
);
456 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
457 MODULE_DESCRIPTION(DRIVER_DESC
);
458 MODULE_LICENSE("GPL");
459 MODULE_ALIAS("platform:imx-ipuv3-crtc");