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2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/gpu/drm/mxsfb/mxsfb_drv.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Copyright (C) 2016 Marek Vasut <marex@denx.de>
34  *
....@@ -5,40 +6,29 @@
56  * Copyright (C) 2010 Juergen Beisert, Pengutronix
67  * Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
78  * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
8
- *
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.
179  */
1810 
19
-#include <linux/module.h>
20
-#include <linux/spinlock.h>
2111 #include <linux/clk.h>
22
-#include <linux/component.h>
23
-#include <linux/list.h>
12
+#include <linux/dma-mapping.h>
13
+#include <linux/io.h>
14
+#include <linux/module.h>
2415 #include <linux/of_device.h>
25
-#include <linux/of_graph.h>
26
-#include <linux/of_reserved_mem.h>
16
+#include <linux/platform_device.h>
2717 #include <linux/pm_runtime.h>
28
-#include <linux/reservation.h>
2918 
30
-#include <drm/drmP.h>
31
-#include <drm/drm_atomic.h>
3219 #include <drm/drm_atomic_helper.h>
33
-#include <drm/drm_crtc.h>
34
-#include <drm/drm_crtc_helper.h>
20
+#include <drm/drm_bridge.h>
21
+#include <drm/drm_connector.h>
22
+#include <drm/drm_drv.h>
3523 #include <drm/drm_fb_helper.h>
36
-#include <drm/drm_fb_cma_helper.h>
24
+#include <drm/drm_fourcc.h>
3725 #include <drm/drm_gem_cma_helper.h>
3826 #include <drm/drm_gem_framebuffer_helper.h>
27
+#include <drm/drm_irq.h>
28
+#include <drm/drm_mode_config.h>
3929 #include <drm/drm_of.h>
40
-#include <drm/drm_panel.h>
41
-#include <drm/drm_simple_kms_helper.h>
30
+#include <drm/drm_probe_helper.h>
31
+#include <drm/drm_vblank.h>
4232 
4333 #include "mxsfb_drv.h"
4434 #include "mxsfb_regs.h"
....@@ -46,6 +36,11 @@
4636 enum mxsfb_devtype {
4737 	MXSFB_V3,
4838 	MXSFB_V4,
39
+	/*
40
+	 * Starting at i.MX6 the hardware version register is gone, use the
41
+	 * i.MX family number as the version.
42
+	 */
43
+	MXSFB_V6,
4944 };
5045 
5146 static const struct mxsfb_devdata mxsfb_devdata[] = {
....@@ -53,32 +48,30 @@
5348 		.transfer_count	= LCDC_V3_TRANSFER_COUNT,
5449 		.cur_buf	= LCDC_V3_CUR_BUF,
5550 		.next_buf	= LCDC_V3_NEXT_BUF,
56
-		.debug0		= LCDC_V3_DEBUG0,
5751 		.hs_wdth_mask	= 0xff,
5852 		.hs_wdth_shift	= 24,
59
-		.ipversion	= 3,
53
+		.has_overlay	= false,
54
+		.has_ctrl2	= false,
6055 	},
6156 	[MXSFB_V4] = {
6257 		.transfer_count	= LCDC_V4_TRANSFER_COUNT,
6358 		.cur_buf	= LCDC_V4_CUR_BUF,
6459 		.next_buf	= LCDC_V4_NEXT_BUF,
65
-		.debug0		= LCDC_V4_DEBUG0,
6660 		.hs_wdth_mask	= 0x3fff,
6761 		.hs_wdth_shift	= 18,
68
-		.ipversion	= 4,
62
+		.has_overlay	= false,
63
+		.has_ctrl2	= true,
64
+	},
65
+	[MXSFB_V6] = {
66
+		.transfer_count	= LCDC_V4_TRANSFER_COUNT,
67
+		.cur_buf	= LCDC_V4_CUR_BUF,
68
+		.next_buf	= LCDC_V4_NEXT_BUF,
69
+		.hs_wdth_mask	= 0x3fff,
70
+		.hs_wdth_shift	= 18,
71
+		.has_overlay	= true,
72
+		.has_ctrl2	= true,
6973 	},
7074 };
71
-
72
-static const uint32_t mxsfb_formats[] = {
73
-	DRM_FORMAT_XRGB8888,
74
-	DRM_FORMAT_RGB565
75
-};
76
-
77
-static struct mxsfb_drm_private *
78
-drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
79
-{
80
-	return container_of(pipe, struct mxsfb_drm_private, pipe);
81
-}
8275 
8376 void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
8477 {
....@@ -92,74 +85,76 @@
9285 		clk_disable_unprepare(mxsfb->clk_axi);
9386 }
9487 
88
+static struct drm_framebuffer *
89
+mxsfb_fb_create(struct drm_device *dev, struct drm_file *file_priv,
90
+		const struct drm_mode_fb_cmd2 *mode_cmd)
91
+{
92
+	const struct drm_format_info *info;
93
+
94
+	info = drm_get_format_info(dev, mode_cmd);
95
+	if (!info)
96
+		return ERR_PTR(-EINVAL);
97
+
98
+	if (mode_cmd->width * info->cpp[0] != mode_cmd->pitches[0]) {
99
+		dev_dbg(dev->dev, "Invalid pitch: fb width must match pitch\n");
100
+		return ERR_PTR(-EINVAL);
101
+	}
102
+
103
+	return drm_gem_fb_create(dev, file_priv, mode_cmd);
104
+}
105
+
95106 static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
96
-	.fb_create		= drm_gem_fb_create,
107
+	.fb_create		= mxsfb_fb_create,
97108 	.atomic_check		= drm_atomic_helper_check,
98109 	.atomic_commit		= drm_atomic_helper_commit,
99110 };
100111 
101
-static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
102
-			      struct drm_crtc_state *crtc_state,
103
-			      struct drm_plane_state *plane_state)
112
+static const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
113
+	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
114
+};
115
+
116
+static int mxsfb_attach_bridge(struct mxsfb_drm_private *mxsfb)
104117 {
105
-	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
118
+	struct drm_device *drm = mxsfb->drm;
119
+	struct drm_connector_list_iter iter;
120
+	struct drm_panel *panel;
121
+	struct drm_bridge *bridge;
122
+	int ret;
106123 
107
-	drm_panel_prepare(mxsfb->panel);
108
-	mxsfb_crtc_enable(mxsfb);
109
-	drm_panel_enable(mxsfb->panel);
110
-}
124
+	ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel,
125
+					  &bridge);
126
+	if (ret)
127
+		return ret;
111128 
112
-static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
113
-{
114
-	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
129
+	if (panel) {
130
+		bridge = devm_drm_panel_bridge_add_typed(drm->dev, panel,
131
+							 DRM_MODE_CONNECTOR_DPI);
132
+		if (IS_ERR(bridge))
133
+			return PTR_ERR(bridge);
134
+	}
115135 
116
-	drm_panel_disable(mxsfb->panel);
117
-	mxsfb_crtc_disable(mxsfb);
118
-	drm_panel_unprepare(mxsfb->panel);
119
-}
136
+	if (!bridge)
137
+		return -ENODEV;
120138 
121
-static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
122
-			      struct drm_plane_state *plane_state)
123
-{
124
-	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
139
+	ret = drm_bridge_attach(&mxsfb->encoder, bridge, NULL, 0);
140
+	if (ret)
141
+		return dev_err_probe(drm->dev, ret, "Failed to attach bridge\n");
125142 
126
-	mxsfb_plane_atomic_update(mxsfb, plane_state);
127
-}
143
+	mxsfb->bridge = bridge;
128144 
129
-static int mxsfb_pipe_enable_vblank(struct drm_simple_display_pipe *pipe)
130
-{
131
-	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
132
-
133
-	/* Clear and enable VBLANK IRQ */
134
-	mxsfb_enable_axi_clk(mxsfb);
135
-	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
136
-	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
137
-	mxsfb_disable_axi_clk(mxsfb);
145
+	/*
146
+	 * Get hold of the connector. This is a bit of a hack, until the bridge
147
+	 * API gives us bus flags and formats.
148
+	 */
149
+	drm_connector_list_iter_begin(drm, &iter);
150
+	mxsfb->connector = drm_connector_list_iter_next(&iter);
151
+	drm_connector_list_iter_end(&iter);
138152 
139153 	return 0;
140154 }
141155 
142
-static void mxsfb_pipe_disable_vblank(struct drm_simple_display_pipe *pipe)
143
-{
144
-	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
145
-
146
-	/* Disable and clear VBLANK IRQ */
147
-	mxsfb_enable_axi_clk(mxsfb);
148
-	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
149
-	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
150
-	mxsfb_disable_axi_clk(mxsfb);
151
-}
152
-
153
-static struct drm_simple_display_pipe_funcs mxsfb_funcs = {
154
-	.enable		= mxsfb_pipe_enable,
155
-	.disable	= mxsfb_pipe_disable,
156
-	.update		= mxsfb_pipe_update,
157
-	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
158
-	.enable_vblank	= mxsfb_pipe_enable_vblank,
159
-	.disable_vblank	= mxsfb_pipe_disable_vblank,
160
-};
161
-
162
-static int mxsfb_load(struct drm_device *drm, unsigned long flags)
156
+static int mxsfb_load(struct drm_device *drm,
157
+		      const struct mxsfb_devdata *devdata)
163158 {
164159 	struct platform_device *pdev = to_platform_device(drm->dev);
165160 	struct mxsfb_drm_private *mxsfb;
....@@ -170,8 +165,9 @@
170165 	if (!mxsfb)
171166 		return -ENOMEM;
172167 
168
+	mxsfb->drm = drm;
173169 	drm->dev_private = mxsfb;
174
-	mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];
170
+	mxsfb->devdata = devdata;
175171 
176172 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
177173 	mxsfb->base = devm_ioremap_resource(drm->dev, res);
....@@ -196,32 +192,28 @@
196192 
197193 	pm_runtime_enable(drm->dev);
198194 
195
+	/* Modeset init */
196
+	drm_mode_config_init(drm);
197
+
198
+	ret = mxsfb_kms_init(mxsfb);
199
+	if (ret < 0) {
200
+		dev_err(drm->dev, "Failed to initialize KMS pipeline\n");
201
+		goto err_vblank;
202
+	}
203
+
199204 	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
200205 	if (ret < 0) {
201206 		dev_err(drm->dev, "Failed to initialise vblank\n");
202207 		goto err_vblank;
203208 	}
204209 
205
-	/* Modeset init */
206
-	drm_mode_config_init(drm);
210
+	/* Start with vertical blanking interrupt reporting disabled. */
211
+	drm_crtc_vblank_off(&mxsfb->crtc);
207212 
208
-	ret = mxsfb_create_output(drm);
209
-	if (ret < 0) {
210
-		dev_err(drm->dev, "Failed to create outputs\n");
211
-		goto err_vblank;
212
-	}
213
-
214
-	ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
215
-			mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL,
216
-			&mxsfb->connector);
217
-	if (ret < 0) {
218
-		dev_err(drm->dev, "Cannot setup simple display pipe\n");
219
-		goto err_vblank;
220
-	}
221
-
222
-	ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
213
+	ret = mxsfb_attach_bridge(mxsfb);
223214 	if (ret) {
224
-		dev_err(drm->dev, "Cannot connect panel\n");
215
+		if (ret != -EPROBE_DEFER)
216
+			dev_err(drm->dev, "Cannot connect bridge: %d\n", ret);
225217 		goto err_vblank;
226218 	}
227219 
....@@ -230,6 +222,7 @@
230222 	drm->mode_config.max_width	= MXSFB_MAX_XRES;
231223 	drm->mode_config.max_height	= MXSFB_MAX_YRES;
232224 	drm->mode_config.funcs		= &mxsfb_mode_config_funcs;
225
+	drm->mode_config.helper_private	= &mxsfb_mode_config_helpers;
233226 
234227 	drm_mode_config_reset(drm);
235228 
....@@ -239,19 +232,10 @@
239232 
240233 	if (ret < 0) {
241234 		dev_err(drm->dev, "Failed to install IRQ handler\n");
242
-		goto err_irq;
235
+		goto err_vblank;
243236 	}
244237 
245238 	drm_kms_helper_poll_init(drm);
246
-
247
-	mxsfb->fbdev = drm_fbdev_cma_init(drm, 32,
248
-					  drm->mode_config.num_connector);
249
-	if (IS_ERR(mxsfb->fbdev)) {
250
-		ret = PTR_ERR(mxsfb->fbdev);
251
-		mxsfb->fbdev = NULL;
252
-		dev_err(drm->dev, "Failed to init FB CMA area\n");
253
-		goto err_cma;
254
-	}
255239 
256240 	platform_set_drvdata(pdev, drm);
257241 
....@@ -259,10 +243,6 @@
259243 
260244 	return 0;
261245 
262
-err_cma:
263
-	drm_irq_uninstall(drm);
264
-err_irq:
265
-	drm_panel_detach(mxsfb->panel);
266246 err_vblank:
267247 	pm_runtime_disable(drm->dev);
268248 
....@@ -271,11 +251,6 @@
271251 
272252 static void mxsfb_unload(struct drm_device *drm)
273253 {
274
-	struct mxsfb_drm_private *mxsfb = drm->dev_private;
275
-
276
-	if (mxsfb->fbdev)
277
-		drm_fbdev_cma_fini(mxsfb->fbdev);
278
-
279254 	drm_kms_helper_poll_fini(drm);
280255 	drm_mode_config_cleanup(drm);
281256 
....@@ -288,18 +263,17 @@
288263 	pm_runtime_disable(drm->dev);
289264 }
290265 
291
-static void mxsfb_lastclose(struct drm_device *drm)
266
+static void mxsfb_irq_disable(struct drm_device *drm)
292267 {
293268 	struct mxsfb_drm_private *mxsfb = drm->dev_private;
294269 
295
-	drm_fbdev_cma_restore_mode(mxsfb->fbdev);
296
-}
270
+	mxsfb_enable_axi_clk(mxsfb);
297271 
298
-static void mxsfb_irq_preinstall(struct drm_device *drm)
299
-{
300
-	struct mxsfb_drm_private *mxsfb = drm->dev_private;
272
+	/* Disable and clear VBLANK IRQ */
273
+	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
274
+	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
301275 
302
-	mxsfb_pipe_disable_vblank(&mxsfb->pipe);
276
+	mxsfb_disable_axi_clk(mxsfb);
303277 }
304278 
305279 static irqreturn_t mxsfb_irq_handler(int irq, void *data)
....@@ -308,16 +282,12 @@
308282 	struct mxsfb_drm_private *mxsfb = drm->dev_private;
309283 	u32 reg;
310284 
311
-	mxsfb_enable_axi_clk(mxsfb);
312
-
313285 	reg = readl(mxsfb->base + LCDC_CTRL1);
314286 
315287 	if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
316
-		drm_crtc_handle_vblank(&mxsfb->pipe.crtc);
288
+		drm_crtc_handle_vblank(&mxsfb->crtc);
317289 
318290 	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
319
-
320
-	mxsfb_disable_axi_clk(mxsfb);
321291 
322292 	return IRQ_HANDLED;
323293 }
....@@ -325,25 +295,11 @@
325295 DEFINE_DRM_GEM_CMA_FOPS(fops);
326296 
327297 static struct drm_driver mxsfb_driver = {
328
-	.driver_features	= DRIVER_GEM | DRIVER_MODESET |
329
-				  DRIVER_PRIME | DRIVER_ATOMIC |
330
-				  DRIVER_HAVE_IRQ,
331
-	.lastclose		= mxsfb_lastclose,
298
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
332299 	.irq_handler		= mxsfb_irq_handler,
333
-	.irq_preinstall		= mxsfb_irq_preinstall,
334
-	.irq_uninstall		= mxsfb_irq_preinstall,
335
-	.gem_free_object_unlocked = drm_gem_cma_free_object,
336
-	.gem_vm_ops		= &drm_gem_cma_vm_ops,
337
-	.dumb_create		= drm_gem_cma_dumb_create,
338
-	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
339
-	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
340
-	.gem_prime_export	= drm_gem_prime_export,
341
-	.gem_prime_import	= drm_gem_prime_import,
342
-	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
343
-	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
344
-	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
345
-	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
346
-	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
300
+	.irq_preinstall		= mxsfb_irq_disable,
301
+	.irq_uninstall		= mxsfb_irq_disable,
302
+	DRM_GEM_CMA_DRIVER_OPS,
347303 	.fops	= &fops,
348304 	.name	= "mxsfb-drm",
349305 	.desc	= "MXSFB Controller DRM",
....@@ -352,18 +308,10 @@
352308 	.minor	= 0,
353309 };
354310 
355
-static const struct platform_device_id mxsfb_devtype[] = {
356
-	{ .name = "imx23-fb", .driver_data = MXSFB_V3, },
357
-	{ .name = "imx28-fb", .driver_data = MXSFB_V4, },
358
-	{ .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
359
-	{ /* sentinel */ }
360
-};
361
-MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
362
-
363311 static const struct of_device_id mxsfb_dt_ids[] = {
364
-	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
365
-	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
366
-	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
312
+	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devdata[MXSFB_V3], },
313
+	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devdata[MXSFB_V4], },
314
+	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devdata[MXSFB_V6], },
367315 	{ /* sentinel */ }
368316 };
369317 MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
....@@ -378,14 +326,11 @@
378326 	if (!pdev->dev.of_node)
379327 		return -ENODEV;
380328 
381
-	if (of_id)
382
-		pdev->id_entry = of_id->data;
383
-
384329 	drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
385330 	if (IS_ERR(drm))
386331 		return PTR_ERR(drm);
387332 
388
-	ret = mxsfb_load(drm, 0);
333
+	ret = mxsfb_load(drm, of_id->data);
389334 	if (ret)
390335 		goto err_free;
391336 
....@@ -393,12 +338,14 @@
393338 	if (ret)
394339 		goto err_unload;
395340 
341
+	drm_fbdev_generic_setup(drm, 32);
342
+
396343 	return 0;
397344 
398345 err_unload:
399346 	mxsfb_unload(drm);
400347 err_free:
401
-	drm_dev_unref(drm);
348
+	drm_dev_put(drm);
402349 
403350 	return ret;
404351 }
....@@ -409,18 +356,38 @@
409356 
410357 	drm_dev_unregister(drm);
411358 	mxsfb_unload(drm);
412
-	drm_dev_unref(drm);
359
+	drm_dev_put(drm);
413360 
414361 	return 0;
415362 }
416363 
364
+#ifdef CONFIG_PM_SLEEP
365
+static int mxsfb_suspend(struct device *dev)
366
+{
367
+	struct drm_device *drm = dev_get_drvdata(dev);
368
+
369
+	return drm_mode_config_helper_suspend(drm);
370
+}
371
+
372
+static int mxsfb_resume(struct device *dev)
373
+{
374
+	struct drm_device *drm = dev_get_drvdata(dev);
375
+
376
+	return drm_mode_config_helper_resume(drm);
377
+}
378
+#endif
379
+
380
+static const struct dev_pm_ops mxsfb_pm_ops = {
381
+	SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
382
+};
383
+
417384 static struct platform_driver mxsfb_platform_driver = {
418385 	.probe		= mxsfb_probe,
419386 	.remove		= mxsfb_remove,
420
-	.id_table	= mxsfb_devtype,
421387 	.driver	= {
422388 		.name		= "mxsfb",
423389 		.of_match_table	= mxsfb_dt_ids,
390
+		.pm		= &mxsfb_pm_ops,
424391 	},
425392 };
426393