1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) STMicroelectronics SA 2017
11 #include <linux/clk.h>
12 #include <linux/component.h>
13 #include <linux/delay.h>
14 #include <linux/interrupt.h>
15 #include <linux/module.h>
16 #include <linux/of_address.h>
17 #include <linux/of_graph.h>
18 #include <linux/pinctrl/consumer.h>
19 #include <linux/platform_device.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/reset.h>
23 #include <drm/drm_atomic.h>
24 #include <drm/drm_atomic_helper.h>
25 #include <drm/drm_bridge.h>
26 #include <drm/drm_device.h>
27 #include <drm/drm_fb_cma_helper.h>
28 #include <drm/drm_fourcc.h>
29 #include <drm/drm_gem_cma_helper.h>
30 #include <drm/drm_gem_framebuffer_helper.h>
31 #include <drm/drm_of.h>
32 #include <drm/drm_plane_helper.h>
33 #include <drm/drm_probe_helper.h>
34 #include <drm/drm_vblank.h>
36 #include <video/videomode.h>
41 #define CRTC_MASK GENMASK(NB_CRTC - 1, 0)
45 #define MAX_ENDPOINTS 2
47 #define HWVER_10200 0x010200
48 #define HWVER_10300 0x010300
49 #define HWVER_20101 0x020101
52 * The address of some registers depends on the HW version: such registers have
53 * an extra offset specified with reg_ofs.
55 #define REG_OFS_NONE 0
56 #define REG_OFS_4 4 /* Insertion of "Layer Conf. 2" reg */
57 #define REG_OFS (ldev->caps.reg_ofs)
58 #define LAY_OFS 0x80 /* Register Offset between 2 layers */
60 /* Global register offsets */
61 #define LTDC_IDR 0x0000 /* IDentification */
62 #define LTDC_LCR 0x0004 /* Layer Count */
63 #define LTDC_SSCR 0x0008 /* Synchronization Size Configuration */
64 #define LTDC_BPCR 0x000C /* Back Porch Configuration */
65 #define LTDC_AWCR 0x0010 /* Active Width Configuration */
66 #define LTDC_TWCR 0x0014 /* Total Width Configuration */
67 #define LTDC_GCR 0x0018 /* Global Control */
68 #define LTDC_GC1R 0x001C /* Global Configuration 1 */
69 #define LTDC_GC2R 0x0020 /* Global Configuration 2 */
70 #define LTDC_SRCR 0x0024 /* Shadow Reload Configuration */
71 #define LTDC_GACR 0x0028 /* GAmma Correction */
72 #define LTDC_BCCR 0x002C /* Background Color Configuration */
73 #define LTDC_IER 0x0034 /* Interrupt Enable */
74 #define LTDC_ISR 0x0038 /* Interrupt Status */
75 #define LTDC_ICR 0x003C /* Interrupt Clear */
76 #define LTDC_LIPCR 0x0040 /* Line Interrupt Position Conf. */
77 #define LTDC_CPSR 0x0044 /* Current Position Status */
78 #define LTDC_CDSR 0x0048 /* Current Display Status */
80 /* Layer register offsets */
81 #define LTDC_L1LC1R (0x80) /* L1 Layer Configuration 1 */
82 #define LTDC_L1LC2R (0x84) /* L1 Layer Configuration 2 */
83 #define LTDC_L1CR (0x84 + REG_OFS)/* L1 Control */
84 #define LTDC_L1WHPCR (0x88 + REG_OFS)/* L1 Window Hor Position Config */
85 #define LTDC_L1WVPCR (0x8C + REG_OFS)/* L1 Window Vert Position Config */
86 #define LTDC_L1CKCR (0x90 + REG_OFS)/* L1 Color Keying Configuration */
87 #define LTDC_L1PFCR (0x94 + REG_OFS)/* L1 Pixel Format Configuration */
88 #define LTDC_L1CACR (0x98 + REG_OFS)/* L1 Constant Alpha Config */
89 #define LTDC_L1DCCR (0x9C + REG_OFS)/* L1 Default Color Configuration */
90 #define LTDC_L1BFCR (0xA0 + REG_OFS)/* L1 Blend Factors Configuration */
91 #define LTDC_L1FBBCR (0xA4 + REG_OFS)/* L1 FrameBuffer Bus Control */
92 #define LTDC_L1AFBCR (0xA8 + REG_OFS)/* L1 AuxFB Control */
93 #define LTDC_L1CFBAR (0xAC + REG_OFS)/* L1 Color FrameBuffer Address */
94 #define LTDC_L1CFBLR (0xB0 + REG_OFS)/* L1 Color FrameBuffer Length */
95 #define LTDC_L1CFBLNR (0xB4 + REG_OFS)/* L1 Color FrameBuffer Line Nb */
96 #define LTDC_L1AFBAR (0xB8 + REG_OFS)/* L1 AuxFB Address */
97 #define LTDC_L1AFBLR (0xBC + REG_OFS)/* L1 AuxFB Length */
98 #define LTDC_L1AFBLNR (0xC0 + REG_OFS)/* L1 AuxFB Line Number */
99 #define LTDC_L1CLUTWR (0xC4 + REG_OFS)/* L1 CLUT Write */
100 #define LTDC_L1YS1R (0xE0 + REG_OFS)/* L1 YCbCr Scale 1 */
101 #define LTDC_L1YS2R (0xE4 + REG_OFS)/* L1 YCbCr Scale 2 */
103 /* Bit definitions */
104 #define SSCR_VSH GENMASK(10, 0) /* Vertical Synchronization Height */
105 #define SSCR_HSW GENMASK(27, 16) /* Horizontal Synchronization Width */
107 #define BPCR_AVBP GENMASK(10, 0) /* Accumulated Vertical Back Porch */
108 #define BPCR_AHBP GENMASK(27, 16) /* Accumulated Horizontal Back Porch */
110 #define AWCR_AAH GENMASK(10, 0) /* Accumulated Active Height */
111 #define AWCR_AAW GENMASK(27, 16) /* Accumulated Active Width */
113 #define TWCR_TOTALH GENMASK(10, 0) /* TOTAL Height */
114 #define TWCR_TOTALW GENMASK(27, 16) /* TOTAL Width */
116 #define GCR_LTDCEN BIT(0) /* LTDC ENable */
117 #define GCR_DEN BIT(16) /* Dither ENable */
118 #define GCR_PCPOL BIT(28) /* Pixel Clock POLarity-Inverted */
119 #define GCR_DEPOL BIT(29) /* Data Enable POLarity-High */
120 #define GCR_VSPOL BIT(30) /* Vertical Synchro POLarity-High */
121 #define GCR_HSPOL BIT(31) /* Horizontal Synchro POLarity-High */
123 #define GC1R_WBCH GENMASK(3, 0) /* Width of Blue CHannel output */
124 #define GC1R_WGCH GENMASK(7, 4) /* Width of Green Channel output */
125 #define GC1R_WRCH GENMASK(11, 8) /* Width of Red Channel output */
126 #define GC1R_PBEN BIT(12) /* Precise Blending ENable */
127 #define GC1R_DT GENMASK(15, 14) /* Dithering Technique */
128 #define GC1R_GCT GENMASK(19, 17) /* Gamma Correction Technique */
129 #define GC1R_SHREN BIT(21) /* SHadow Registers ENabled */
130 #define GC1R_BCP BIT(22) /* Background Colour Programmable */
131 #define GC1R_BBEN BIT(23) /* Background Blending ENabled */
132 #define GC1R_LNIP BIT(24) /* Line Number IRQ Position */
133 #define GC1R_TP BIT(25) /* Timing Programmable */
134 #define GC1R_IPP BIT(26) /* IRQ Polarity Programmable */
135 #define GC1R_SPP BIT(27) /* Sync Polarity Programmable */
136 #define GC1R_DWP BIT(28) /* Dither Width Programmable */
137 #define GC1R_STREN BIT(29) /* STatus Registers ENabled */
138 #define GC1R_BMEN BIT(31) /* Blind Mode ENabled */
140 #define GC2R_EDCA BIT(0) /* External Display Control Ability */
141 #define GC2R_STSAEN BIT(1) /* Slave Timing Sync Ability ENabled */
142 #define GC2R_DVAEN BIT(2) /* Dual-View Ability ENabled */
143 #define GC2R_DPAEN BIT(3) /* Dual-Port Ability ENabled */
144 #define GC2R_BW GENMASK(6, 4) /* Bus Width (log2 of nb of bytes) */
145 #define GC2R_EDCEN BIT(7) /* External Display Control ENabled */
147 #define SRCR_IMR BIT(0) /* IMmediate Reload */
148 #define SRCR_VBR BIT(1) /* Vertical Blanking Reload */
150 #define BCCR_BCBLACK 0x00 /* Background Color BLACK */
151 #define BCCR_BCBLUE GENMASK(7, 0) /* Background Color BLUE */
152 #define BCCR_BCGREEN GENMASK(15, 8) /* Background Color GREEN */
153 #define BCCR_BCRED GENMASK(23, 16) /* Background Color RED */
154 #define BCCR_BCWHITE GENMASK(23, 0) /* Background Color WHITE */
156 #define IER_LIE BIT(0) /* Line Interrupt Enable */
157 #define IER_FUIE BIT(1) /* Fifo Underrun Interrupt Enable */
158 #define IER_TERRIE BIT(2) /* Transfer ERRor Interrupt Enable */
159 #define IER_RRIE BIT(3) /* Register Reload Interrupt enable */
161 #define CPSR_CYPOS GENMASK(15, 0) /* Current Y position */
163 #define ISR_LIF BIT(0) /* Line Interrupt Flag */
164 #define ISR_FUIF BIT(1) /* Fifo Underrun Interrupt Flag */
165 #define ISR_TERRIF BIT(2) /* Transfer ERRor Interrupt Flag */
166 #define ISR_RRIF BIT(3) /* Register Reload Interrupt Flag */
168 #define LXCR_LEN BIT(0) /* Layer ENable */
169 #define LXCR_COLKEN BIT(1) /* Color Keying Enable */
170 #define LXCR_CLUTEN BIT(4) /* Color Look-Up Table ENable */
172 #define LXWHPCR_WHSTPOS GENMASK(11, 0) /* Window Horizontal StarT POSition */
173 #define LXWHPCR_WHSPPOS GENMASK(27, 16) /* Window Horizontal StoP POSition */
175 #define LXWVPCR_WVSTPOS GENMASK(10, 0) /* Window Vertical StarT POSition */
176 #define LXWVPCR_WVSPPOS GENMASK(26, 16) /* Window Vertical StoP POSition */
178 #define LXPFCR_PF GENMASK(2, 0) /* Pixel Format */
180 #define LXCACR_CONSTA GENMASK(7, 0) /* CONSTant Alpha */
182 #define LXBFCR_BF2 GENMASK(2, 0) /* Blending Factor 2 */
183 #define LXBFCR_BF1 GENMASK(10, 8) /* Blending Factor 1 */
185 #define LXCFBLR_CFBLL GENMASK(12, 0) /* Color Frame Buffer Line Length */
186 #define LXCFBLR_CFBP GENMASK(28, 16) /* Color Frame Buffer Pitch in bytes */
188 #define LXCFBLNR_CFBLN GENMASK(10, 0) /* Color Frame Buffer Line Number */
190 #define CLUT_SIZE 256
192 #define CONSTA_MAX 0xFF /* CONSTant Alpha MAX= 1.0 */
193 #define BF1_PAXCA 0x600 /* Pixel Alpha x Constant Alpha */
194 #define BF1_CA 0x400 /* Constant Alpha */
195 #define BF2_1PAXCA 0x007 /* 1 - (Pixel Alpha x Constant Alpha) */
196 #define BF2_1CA 0x005 /* 1 - Constant Alpha */
198 #define NB_PF 8 /* Max nb of HW pixel format */
203 PF_ARGB8888, /* ARGB [32 bits] */
204 PF_RGBA8888, /* RGBA [32 bits] */
205 PF_RGB888, /* RGB [24 bits] */
206 PF_RGB565, /* RGB [16 bits] */
207 PF_ARGB1555, /* ARGB A:1 bit RGB:15 bits [16 bits] */
208 PF_ARGB4444, /* ARGB A:4 bits R/G/B: 4 bits each [16 bits] */
209 /* Indexed formats */
210 PF_L8, /* Indexed 8 bits [8 bits] */
211 PF_AL44, /* Alpha:4 bits + indexed 4 bits [8 bits] */
212 PF_AL88 /* Alpha:8 bits + indexed 8 bits [16 bits] */
215 /* The index gives the encoding of the pixel format for an HW version */
216 static const enum ltdc_pix_fmt ltdc_pix_fmt_a0[NB_PF] = {
217 PF_ARGB8888, /* 0x00 */
218 PF_RGB888, /* 0x01 */
219 PF_RGB565, /* 0x02 */
220 PF_ARGB1555, /* 0x03 */
221 PF_ARGB4444, /* 0x04 */
227 static const enum ltdc_pix_fmt ltdc_pix_fmt_a1[NB_PF] = {
228 PF_ARGB8888, /* 0x00 */
229 PF_RGB888, /* 0x01 */
230 PF_RGB565, /* 0x02 */
231 PF_RGBA8888, /* 0x03 */
234 PF_ARGB1555, /* 0x06 */
235 PF_ARGB4444 /* 0x07 */
238 static const u64 ltdc_format_modifiers[] = {
239 DRM_FORMAT_MOD_LINEAR,
240 DRM_FORMAT_MOD_INVALID
243 static inline u32 reg_read(void __iomem *base, u32 reg)
245 return readl_relaxed(base + reg);
248 static inline void reg_write(void __iomem *base, u32 reg, u32 val)
250 writel_relaxed(val, base + reg);
253 static inline void reg_set(void __iomem *base, u32 reg, u32 mask)
255 reg_write(base, reg, reg_read(base, reg) | mask);
258 static inline void reg_clear(void __iomem *base, u32 reg, u32 mask)
260 reg_write(base, reg, reg_read(base, reg) & ~mask);
263 static inline void reg_update_bits(void __iomem *base, u32 reg, u32 mask,
266 reg_write(base, reg, (reg_read(base, reg) & ~mask) | val);
269 static inline struct ltdc_device *crtc_to_ltdc(struct drm_crtc *crtc)
271 return (struct ltdc_device *)crtc->dev->dev_private;
274 static inline struct ltdc_device *plane_to_ltdc(struct drm_plane *plane)
276 return (struct ltdc_device *)plane->dev->dev_private;
279 static inline struct ltdc_device *encoder_to_ltdc(struct drm_encoder *enc)
281 return (struct ltdc_device *)enc->dev->dev_private;
284 static inline enum ltdc_pix_fmt to_ltdc_pixelformat(u32 drm_fmt)
286 enum ltdc_pix_fmt pf;
289 case DRM_FORMAT_ARGB8888:
290 case DRM_FORMAT_XRGB8888:
293 case DRM_FORMAT_RGBA8888:
294 case DRM_FORMAT_RGBX8888:
297 case DRM_FORMAT_RGB888:
300 case DRM_FORMAT_RGB565:
303 case DRM_FORMAT_ARGB1555:
304 case DRM_FORMAT_XRGB1555:
307 case DRM_FORMAT_ARGB4444:
308 case DRM_FORMAT_XRGB4444:
317 /* Note: There are no DRM_FORMAT for AL44 and AL88 */
323 static inline u32 to_drm_pixelformat(enum ltdc_pix_fmt pf)
327 return DRM_FORMAT_ARGB8888;
329 return DRM_FORMAT_RGBA8888;
331 return DRM_FORMAT_RGB888;
333 return DRM_FORMAT_RGB565;
335 return DRM_FORMAT_ARGB1555;
337 return DRM_FORMAT_ARGB4444;
339 return DRM_FORMAT_C8;
340 case PF_AL44: /* No DRM support */
341 case PF_AL88: /* No DRM support */
348 static inline u32 get_pixelformat_without_alpha(u32 drm)
351 case DRM_FORMAT_ARGB4444:
352 return DRM_FORMAT_XRGB4444;
353 case DRM_FORMAT_RGBA4444:
354 return DRM_FORMAT_RGBX4444;
355 case DRM_FORMAT_ARGB1555:
356 return DRM_FORMAT_XRGB1555;
357 case DRM_FORMAT_RGBA5551:
358 return DRM_FORMAT_RGBX5551;
359 case DRM_FORMAT_ARGB8888:
360 return DRM_FORMAT_XRGB8888;
361 case DRM_FORMAT_RGBA8888:
362 return DRM_FORMAT_RGBX8888;
368 static irqreturn_t ltdc_irq_thread(int irq, void *arg)
370 struct drm_device *ddev = arg;
371 struct ltdc_device *ldev = ddev->dev_private;
372 struct drm_crtc *crtc = drm_crtc_from_index(ddev, 0);
374 /* Line IRQ : trigger the vblank event */
375 if (ldev->irq_status & ISR_LIF)
376 drm_crtc_handle_vblank(crtc);
378 /* Save FIFO Underrun & Transfer Error status */
379 mutex_lock(&ldev->err_lock);
380 if (ldev->irq_status & ISR_FUIF)
381 ldev->error_status |= ISR_FUIF;
382 if (ldev->irq_status & ISR_TERRIF)
383 ldev->error_status |= ISR_TERRIF;
384 mutex_unlock(&ldev->err_lock);
389 static irqreturn_t ltdc_irq(int irq, void *arg)
391 struct drm_device *ddev = arg;
392 struct ltdc_device *ldev = ddev->dev_private;
394 /* Read & Clear the interrupt status */
395 ldev->irq_status = reg_read(ldev->regs, LTDC_ISR);
396 reg_write(ldev->regs, LTDC_ICR, ldev->irq_status);
398 return IRQ_WAKE_THREAD;
405 static void ltdc_crtc_update_clut(struct drm_crtc *crtc)
407 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
408 struct drm_color_lut *lut;
412 if (!crtc->state->color_mgmt_changed || !crtc->state->gamma_lut)
415 lut = (struct drm_color_lut *)crtc->state->gamma_lut->data;
417 for (i = 0; i < CLUT_SIZE; i++, lut++) {
418 val = ((lut->red << 8) & 0xff0000) | (lut->green & 0xff00) |
419 (lut->blue >> 8) | (i << 24);
420 reg_write(ldev->regs, LTDC_L1CLUTWR, val);
424 static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
425 struct drm_crtc_state *old_state)
427 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
429 DRM_DEBUG_DRIVER("\n");
431 /* Sets the background color value */
432 reg_write(ldev->regs, LTDC_BCCR, BCCR_BCBLACK);
435 reg_set(ldev->regs, LTDC_IER, IER_RRIE | IER_FUIE | IER_TERRIE);
437 /* Commit shadow registers = update planes at next vblank */
438 reg_set(ldev->regs, LTDC_SRCR, SRCR_VBR);
441 reg_set(ldev->regs, LTDC_GCR, GCR_LTDCEN);
443 drm_crtc_vblank_on(crtc);
446 static void ltdc_crtc_atomic_disable(struct drm_crtc *crtc,
447 struct drm_crtc_state *old_state)
449 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
450 struct drm_device *ddev = crtc->dev;
452 DRM_DEBUG_DRIVER("\n");
454 drm_crtc_vblank_off(crtc);
457 reg_clear(ldev->regs, LTDC_GCR, GCR_LTDCEN);
460 reg_clear(ldev->regs, LTDC_IER, IER_RRIE | IER_FUIE | IER_TERRIE);
462 /* immediately commit disable of layers before switching off LTDC */
463 reg_set(ldev->regs, LTDC_SRCR, SRCR_IMR);
465 pm_runtime_put_sync(ddev->dev);
468 #define CLK_TOLERANCE_HZ 50
470 static enum drm_mode_status
471 ltdc_crtc_mode_valid(struct drm_crtc *crtc,
472 const struct drm_display_mode *mode)
474 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
475 int target = mode->clock * 1000;
476 int target_min = target - CLK_TOLERANCE_HZ;
477 int target_max = target + CLK_TOLERANCE_HZ;
480 result = clk_round_rate(ldev->pixel_clk, target);
482 DRM_DEBUG_DRIVER("clk rate target %d, available %d\n", target, result);
484 /* Filter modes according to the max frequency supported by the pads */
485 if (result > ldev->caps.pad_max_freq_hz)
486 return MODE_CLOCK_HIGH;
489 * Accept all "preferred" modes:
490 * - this is important for panels because panel clock tolerances are
491 * bigger than hdmi ones and there is no reason to not accept them
492 * (the fps may vary a little but it is not a problem).
493 * - the hdmi preferred mode will be accepted too, but userland will
494 * be able to use others hdmi "valid" modes if necessary.
496 if (mode->type & DRM_MODE_TYPE_PREFERRED)
500 * Filter modes according to the clock value, particularly useful for
501 * hdmi modes that require precise pixel clocks.
503 if (result < target_min || result > target_max)
504 return MODE_CLOCK_RANGE;
509 static bool ltdc_crtc_mode_fixup(struct drm_crtc *crtc,
510 const struct drm_display_mode *mode,
511 struct drm_display_mode *adjusted_mode)
513 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
514 struct drm_device *ddev = crtc->dev;
515 int rate = mode->clock * 1000;
519 runtime_active = pm_runtime_active(ddev->dev);
522 pm_runtime_put_sync(ddev->dev);
524 if (clk_set_rate(ldev->pixel_clk, rate) < 0) {
525 DRM_ERROR("Cannot set rate (%dHz) for pixel clk\n", rate);
529 adjusted_mode->clock = clk_get_rate(ldev->pixel_clk) / 1000;
531 if (runtime_active) {
532 ret = pm_runtime_get_sync(ddev->dev);
534 DRM_ERROR("Failed to fixup mode, cannot get sync\n");
539 DRM_DEBUG_DRIVER("requested clock %dkHz, adjusted clock %dkHz\n",
540 mode->clock, adjusted_mode->clock);
545 static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc)
547 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
548 struct drm_device *ddev = crtc->dev;
549 struct drm_display_mode *mode = &crtc->state->adjusted_mode;
551 u32 hsync, vsync, accum_hbp, accum_vbp, accum_act_w, accum_act_h;
552 u32 total_width, total_height;
556 if (!pm_runtime_active(ddev->dev)) {
557 ret = pm_runtime_get_sync(ddev->dev);
559 DRM_ERROR("Failed to set mode, cannot get sync\n");
564 drm_display_mode_to_videomode(mode, &vm);
566 DRM_DEBUG_DRIVER("CRTC:%d mode:%s\n", crtc->base.id, mode->name);
567 DRM_DEBUG_DRIVER("Video mode: %dx%d", vm.hactive, vm.vactive);
568 DRM_DEBUG_DRIVER(" hfp %d hbp %d hsl %d vfp %d vbp %d vsl %d\n",
569 vm.hfront_porch, vm.hback_porch, vm.hsync_len,
570 vm.vfront_porch, vm.vback_porch, vm.vsync_len);
572 /* Convert video timings to ltdc timings */
573 hsync = vm.hsync_len - 1;
574 vsync = vm.vsync_len - 1;
575 accum_hbp = hsync + vm.hback_porch;
576 accum_vbp = vsync + vm.vback_porch;
577 accum_act_w = accum_hbp + vm.hactive;
578 accum_act_h = accum_vbp + vm.vactive;
579 total_width = accum_act_w + vm.hfront_porch;
580 total_height = accum_act_h + vm.vfront_porch;
582 /* Configures the HS, VS, DE and PC polarities. Default Active Low */
585 if (vm.flags & DISPLAY_FLAGS_HSYNC_HIGH)
588 if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH)
591 if (vm.flags & DISPLAY_FLAGS_DE_LOW)
594 if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
597 reg_update_bits(ldev->regs, LTDC_GCR,
598 GCR_HSPOL | GCR_VSPOL | GCR_DEPOL | GCR_PCPOL, val);
600 /* Set Synchronization size */
601 val = (hsync << 16) | vsync;
602 reg_update_bits(ldev->regs, LTDC_SSCR, SSCR_VSH | SSCR_HSW, val);
604 /* Set Accumulated Back porch */
605 val = (accum_hbp << 16) | accum_vbp;
606 reg_update_bits(ldev->regs, LTDC_BPCR, BPCR_AVBP | BPCR_AHBP, val);
608 /* Set Accumulated Active Width */
609 val = (accum_act_w << 16) | accum_act_h;
610 reg_update_bits(ldev->regs, LTDC_AWCR, AWCR_AAW | AWCR_AAH, val);
612 /* Set total width & height */
613 val = (total_width << 16) | total_height;
614 reg_update_bits(ldev->regs, LTDC_TWCR, TWCR_TOTALH | TWCR_TOTALW, val);
616 reg_write(ldev->regs, LTDC_LIPCR, (accum_act_h + 1));
619 static void ltdc_crtc_atomic_flush(struct drm_crtc *crtc,
620 struct drm_crtc_state *old_crtc_state)
622 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
623 struct drm_device *ddev = crtc->dev;
624 struct drm_pending_vblank_event *event = crtc->state->event;
626 DRM_DEBUG_ATOMIC("\n");
628 ltdc_crtc_update_clut(crtc);
630 /* Commit shadow registers = update planes at next vblank */
631 reg_set(ldev->regs, LTDC_SRCR, SRCR_VBR);
634 crtc->state->event = NULL;
636 spin_lock_irq(&ddev->event_lock);
637 if (drm_crtc_vblank_get(crtc) == 0)
638 drm_crtc_arm_vblank_event(crtc, event);
640 drm_crtc_send_vblank_event(crtc, event);
641 spin_unlock_irq(&ddev->event_lock);
645 static const struct drm_crtc_helper_funcs ltdc_crtc_helper_funcs = {
646 .mode_valid = ltdc_crtc_mode_valid,
647 .mode_fixup = ltdc_crtc_mode_fixup,
648 .mode_set_nofb = ltdc_crtc_mode_set_nofb,
649 .atomic_flush = ltdc_crtc_atomic_flush,
650 .atomic_enable = ltdc_crtc_atomic_enable,
651 .atomic_disable = ltdc_crtc_atomic_disable,
654 static int ltdc_crtc_enable_vblank(struct drm_crtc *crtc)
656 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
658 DRM_DEBUG_DRIVER("\n");
659 reg_set(ldev->regs, LTDC_IER, IER_LIE);
664 static void ltdc_crtc_disable_vblank(struct drm_crtc *crtc)
666 struct ltdc_device *ldev = crtc_to_ltdc(crtc);
668 DRM_DEBUG_DRIVER("\n");
669 reg_clear(ldev->regs, LTDC_IER, IER_LIE);
672 bool ltdc_crtc_scanoutpos(struct drm_device *ddev, unsigned int pipe,
673 bool in_vblank_irq, int *vpos, int *hpos,
674 ktime_t *stime, ktime_t *etime,
675 const struct drm_display_mode *mode)
677 struct ltdc_device *ldev = ddev->dev_private;
678 int line, vactive_start, vactive_end, vtotal;
681 *stime = ktime_get();
683 /* The active area starts after vsync + front porch and ends
684 * at vsync + front porc + display size.
685 * The total height also include back porch.
686 * We have 3 possible cases to handle:
687 * - line < vactive_start: vpos = line - vactive_start and will be
689 * - vactive_start < line < vactive_end: vpos = line - vactive_start
690 * and will be positive
691 * - line > vactive_end: vpos = line - vtotal - vactive_start
694 * Computation for the two first cases are identical so we can
695 * simplify the code and only test if line > vactive_end
697 if (pm_runtime_active(ddev->dev)) {
698 line = reg_read(ldev->regs, LTDC_CPSR) & CPSR_CYPOS;
699 vactive_start = reg_read(ldev->regs, LTDC_BPCR) & BPCR_AVBP;
700 vactive_end = reg_read(ldev->regs, LTDC_AWCR) & AWCR_AAH;
701 vtotal = reg_read(ldev->regs, LTDC_TWCR) & TWCR_TOTALH;
703 if (line > vactive_end)
704 *vpos = line - vtotal - vactive_start;
706 *vpos = line - vactive_start;
714 *etime = ktime_get();
719 static const struct drm_crtc_funcs ltdc_crtc_funcs = {
720 .destroy = drm_crtc_cleanup,
721 .set_config = drm_atomic_helper_set_config,
722 .page_flip = drm_atomic_helper_page_flip,
723 .reset = drm_atomic_helper_crtc_reset,
724 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
725 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
726 .enable_vblank = ltdc_crtc_enable_vblank,
727 .disable_vblank = ltdc_crtc_disable_vblank,
728 .gamma_set = drm_atomic_helper_legacy_gamma_set,
735 static int ltdc_plane_atomic_check(struct drm_plane *plane,
736 struct drm_plane_state *state)
738 struct drm_framebuffer *fb = state->fb;
741 DRM_DEBUG_DRIVER("\n");
746 /* convert src_ from 16:16 format */
747 src_w = state->src_w >> 16;
748 src_h = state->src_h >> 16;
751 if (src_w != state->crtc_w || src_h != state->crtc_h) {
752 DRM_ERROR("Scaling is not supported");
759 static void ltdc_plane_atomic_update(struct drm_plane *plane,
760 struct drm_plane_state *oldstate)
762 struct ltdc_device *ldev = plane_to_ltdc(plane);
763 struct drm_plane_state *state = plane->state;
764 struct drm_framebuffer *fb = state->fb;
765 u32 lofs = plane->index * LAY_OFS;
766 u32 x0 = state->crtc_x;
767 u32 x1 = state->crtc_x + state->crtc_w - 1;
768 u32 y0 = state->crtc_y;
769 u32 y1 = state->crtc_y + state->crtc_h - 1;
770 u32 src_x, src_y, src_w, src_h;
771 u32 val, pitch_in_bytes, line_length, paddr, ahbp, avbp, bpcr;
772 enum ltdc_pix_fmt pf;
774 if (!state->crtc || !fb) {
775 DRM_DEBUG_DRIVER("fb or crtc NULL");
779 /* convert src_ from 16:16 format */
780 src_x = state->src_x >> 16;
781 src_y = state->src_y >> 16;
782 src_w = state->src_w >> 16;
783 src_h = state->src_h >> 16;
785 DRM_DEBUG_DRIVER("plane:%d fb:%d (%dx%d)@(%d,%d) -> (%dx%d)@(%d,%d)\n",
786 plane->base.id, fb->base.id,
787 src_w, src_h, src_x, src_y,
788 state->crtc_w, state->crtc_h,
789 state->crtc_x, state->crtc_y);
791 bpcr = reg_read(ldev->regs, LTDC_BPCR);
792 ahbp = (bpcr & BPCR_AHBP) >> 16;
793 avbp = bpcr & BPCR_AVBP;
795 /* Configures the horizontal start and stop position */
796 val = ((x1 + 1 + ahbp) << 16) + (x0 + 1 + ahbp);
797 reg_update_bits(ldev->regs, LTDC_L1WHPCR + lofs,
798 LXWHPCR_WHSTPOS | LXWHPCR_WHSPPOS, val);
800 /* Configures the vertical start and stop position */
801 val = ((y1 + 1 + avbp) << 16) + (y0 + 1 + avbp);
802 reg_update_bits(ldev->regs, LTDC_L1WVPCR + lofs,
803 LXWVPCR_WVSTPOS | LXWVPCR_WVSPPOS, val);
805 /* Specifies the pixel format */
806 pf = to_ltdc_pixelformat(fb->format->format);
807 for (val = 0; val < NB_PF; val++)
808 if (ldev->caps.pix_fmt_hw[val] == pf)
812 DRM_ERROR("Pixel format %.4s not supported\n",
813 (char *)&fb->format->format);
814 val = 0; /* set by default ARGB 32 bits */
816 reg_update_bits(ldev->regs, LTDC_L1PFCR + lofs, LXPFCR_PF, val);
818 /* Configures the color frame buffer pitch in bytes & line length */
819 pitch_in_bytes = fb->pitches[0];
820 line_length = fb->format->cpp[0] *
821 (x1 - x0 + 1) + (ldev->caps.bus_width >> 3) - 1;
822 val = ((pitch_in_bytes << 16) | line_length);
823 reg_update_bits(ldev->regs, LTDC_L1CFBLR + lofs,
824 LXCFBLR_CFBLL | LXCFBLR_CFBP, val);
826 /* Specifies the constant alpha value */
828 reg_update_bits(ldev->regs, LTDC_L1CACR + lofs, LXCACR_CONSTA, val);
830 /* Specifies the blending factors */
831 val = BF1_PAXCA | BF2_1PAXCA;
832 if (!fb->format->has_alpha)
833 val = BF1_CA | BF2_1CA;
835 /* Manage hw-specific capabilities */
836 if (ldev->caps.non_alpha_only_l1 &&
837 plane->type != DRM_PLANE_TYPE_PRIMARY)
838 val = BF1_PAXCA | BF2_1PAXCA;
840 reg_update_bits(ldev->regs, LTDC_L1BFCR + lofs,
841 LXBFCR_BF2 | LXBFCR_BF1, val);
843 /* Configures the frame buffer line number */
845 reg_update_bits(ldev->regs, LTDC_L1CFBLNR + lofs, LXCFBLNR_CFBLN, val);
847 /* Sets the FB address */
848 paddr = (u32)drm_fb_cma_get_gem_addr(fb, state, 0);
850 DRM_DEBUG_DRIVER("fb: phys 0x%08x", paddr);
851 reg_write(ldev->regs, LTDC_L1CFBAR + lofs, paddr);
853 /* Enable layer and CLUT if needed */
854 val = fb->format->format == DRM_FORMAT_C8 ? LXCR_CLUTEN : 0;
856 reg_update_bits(ldev->regs, LTDC_L1CR + lofs,
857 LXCR_LEN | LXCR_CLUTEN, val);
859 ldev->plane_fpsi[plane->index].counter++;
861 mutex_lock(&ldev->err_lock);
862 if (ldev->error_status & ISR_FUIF) {
863 DRM_WARN("ltdc fifo underrun: please verify display mode\n");
864 ldev->error_status &= ~ISR_FUIF;
866 if (ldev->error_status & ISR_TERRIF) {
867 DRM_WARN("ltdc transfer error\n");
868 ldev->error_status &= ~ISR_TERRIF;
870 mutex_unlock(&ldev->err_lock);
873 static void ltdc_plane_atomic_disable(struct drm_plane *plane,
874 struct drm_plane_state *oldstate)
876 struct ltdc_device *ldev = plane_to_ltdc(plane);
877 u32 lofs = plane->index * LAY_OFS;
880 reg_clear(ldev->regs, LTDC_L1CR + lofs, LXCR_LEN);
882 DRM_DEBUG_DRIVER("CRTC:%d plane:%d\n",
883 oldstate->crtc->base.id, plane->base.id);
886 static void ltdc_plane_atomic_print_state(struct drm_printer *p,
887 const struct drm_plane_state *state)
889 struct drm_plane *plane = state->plane;
890 struct ltdc_device *ldev = plane_to_ltdc(plane);
891 struct fps_info *fpsi = &ldev->plane_fpsi[plane->index];
896 ms_since_last = ktime_to_ms(ktime_sub(now, fpsi->last_timestamp));
898 drm_printf(p, "\tuser_updates=%dfps\n",
899 DIV_ROUND_CLOSEST(fpsi->counter * 1000, ms_since_last));
901 fpsi->last_timestamp = now;
905 static bool ltdc_plane_format_mod_supported(struct drm_plane *plane,
909 if (modifier == DRM_FORMAT_MOD_LINEAR)
915 static const struct drm_plane_funcs ltdc_plane_funcs = {
916 .update_plane = drm_atomic_helper_update_plane,
917 .disable_plane = drm_atomic_helper_disable_plane,
918 .destroy = drm_plane_cleanup,
919 .reset = drm_atomic_helper_plane_reset,
920 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
921 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
922 .atomic_print_state = ltdc_plane_atomic_print_state,
923 .format_mod_supported = ltdc_plane_format_mod_supported,
926 static const struct drm_plane_helper_funcs ltdc_plane_helper_funcs = {
927 .prepare_fb = drm_gem_fb_prepare_fb,
928 .atomic_check = ltdc_plane_atomic_check,
929 .atomic_update = ltdc_plane_atomic_update,
930 .atomic_disable = ltdc_plane_atomic_disable,
933 static struct drm_plane *ltdc_plane_create(struct drm_device *ddev,
934 enum drm_plane_type type)
936 unsigned long possible_crtcs = CRTC_MASK;
937 struct ltdc_device *ldev = ddev->dev_private;
938 struct device *dev = ddev->dev;
939 struct drm_plane *plane;
940 unsigned int i, nb_fmt = 0;
941 u32 formats[NB_PF * 2];
942 u32 drm_fmt, drm_fmt_no_alpha;
943 const u64 *modifiers = ltdc_format_modifiers;
946 /* Get supported pixel formats */
947 for (i = 0; i < NB_PF; i++) {
948 drm_fmt = to_drm_pixelformat(ldev->caps.pix_fmt_hw[i]);
951 formats[nb_fmt++] = drm_fmt;
953 /* Add the no-alpha related format if any & supported */
954 drm_fmt_no_alpha = get_pixelformat_without_alpha(drm_fmt);
955 if (!drm_fmt_no_alpha)
958 /* Manage hw-specific capabilities */
959 if (ldev->caps.non_alpha_only_l1 &&
960 type != DRM_PLANE_TYPE_PRIMARY)
963 formats[nb_fmt++] = drm_fmt_no_alpha;
966 plane = devm_kzalloc(dev, sizeof(*plane), GFP_KERNEL);
970 ret = drm_universal_plane_init(ddev, plane, possible_crtcs,
971 <dc_plane_funcs, formats, nb_fmt,
972 modifiers, type, NULL);
976 drm_plane_helper_add(plane, <dc_plane_helper_funcs);
978 DRM_DEBUG_DRIVER("plane:%d created\n", plane->base.id);
983 static void ltdc_plane_destroy_all(struct drm_device *ddev)
985 struct drm_plane *plane, *plane_temp;
987 list_for_each_entry_safe(plane, plane_temp,
988 &ddev->mode_config.plane_list, head)
989 drm_plane_cleanup(plane);
992 static int ltdc_crtc_init(struct drm_device *ddev, struct drm_crtc *crtc)
994 struct ltdc_device *ldev = ddev->dev_private;
995 struct drm_plane *primary, *overlay;
999 primary = ltdc_plane_create(ddev, DRM_PLANE_TYPE_PRIMARY);
1001 DRM_ERROR("Can not create primary plane\n");
1005 ret = drm_crtc_init_with_planes(ddev, crtc, primary, NULL,
1006 <dc_crtc_funcs, NULL);
1008 DRM_ERROR("Can not initialize CRTC\n");
1012 drm_crtc_helper_add(crtc, <dc_crtc_helper_funcs);
1014 drm_mode_crtc_set_gamma_size(crtc, CLUT_SIZE);
1015 drm_crtc_enable_color_mgmt(crtc, 0, false, CLUT_SIZE);
1017 DRM_DEBUG_DRIVER("CRTC:%d created\n", crtc->base.id);
1019 /* Add planes. Note : the first layer is used by primary plane */
1020 for (i = 1; i < ldev->caps.nb_layers; i++) {
1021 overlay = ltdc_plane_create(ddev, DRM_PLANE_TYPE_OVERLAY);
1024 DRM_ERROR("Can not create overlay plane %d\n", i);
1032 ltdc_plane_destroy_all(ddev);
1040 static const struct drm_encoder_funcs ltdc_encoder_funcs = {
1041 .destroy = drm_encoder_cleanup,
1044 static void ltdc_encoder_disable(struct drm_encoder *encoder)
1046 struct drm_device *ddev = encoder->dev;
1048 DRM_DEBUG_DRIVER("\n");
1050 /* Set to sleep state the pinctrl whatever type of encoder */
1051 pinctrl_pm_select_sleep_state(ddev->dev);
1054 static void ltdc_encoder_enable(struct drm_encoder *encoder)
1056 struct drm_device *ddev = encoder->dev;
1058 DRM_DEBUG_DRIVER("\n");
1061 * Set to default state the pinctrl only with DPI type.
1062 * Others types like DSI, don't need pinctrl due to
1063 * internal bridge (the signals do not come out of the chipset).
1065 if (encoder->encoder_type == DRM_MODE_ENCODER_DPI)
1066 pinctrl_pm_select_default_state(ddev->dev);
1069 static const struct drm_encoder_helper_funcs ltdc_encoder_helper_funcs = {
1070 .disable = ltdc_encoder_disable,
1071 .enable = ltdc_encoder_enable,
1074 static int ltdc_encoder_init(struct drm_device *ddev, struct drm_bridge *bridge)
1076 struct drm_encoder *encoder;
1079 encoder = devm_kzalloc(ddev->dev, sizeof(*encoder), GFP_KERNEL);
1083 encoder->possible_crtcs = CRTC_MASK;
1084 encoder->possible_clones = 0; /* No cloning support */
1086 drm_encoder_init(ddev, encoder, <dc_encoder_funcs,
1087 DRM_MODE_ENCODER_DPI, NULL);
1089 drm_encoder_helper_add(encoder, <dc_encoder_helper_funcs);
1091 ret = drm_bridge_attach(encoder, bridge, NULL);
1093 drm_encoder_cleanup(encoder);
1097 DRM_DEBUG_DRIVER("Bridge encoder:%d created\n", encoder->base.id);
1102 static int ltdc_get_caps(struct drm_device *ddev)
1104 struct ltdc_device *ldev = ddev->dev_private;
1105 u32 bus_width_log2, lcr, gc2r;
1108 * at least 1 layer must be managed & the number of layers
1109 * must not exceed LTDC_MAX_LAYER
1111 lcr = reg_read(ldev->regs, LTDC_LCR);
1113 ldev->caps.nb_layers = clamp((int)lcr, 1, LTDC_MAX_LAYER);
1115 /* set data bus width */
1116 gc2r = reg_read(ldev->regs, LTDC_GC2R);
1117 bus_width_log2 = (gc2r & GC2R_BW) >> 4;
1118 ldev->caps.bus_width = 8 << bus_width_log2;
1119 ldev->caps.hw_version = reg_read(ldev->regs, LTDC_IDR);
1121 switch (ldev->caps.hw_version) {
1124 ldev->caps.reg_ofs = REG_OFS_NONE;
1125 ldev->caps.pix_fmt_hw = ltdc_pix_fmt_a0;
1127 * Hw older versions support non-alpha color formats derived
1128 * from native alpha color formats only on the primary layer.
1129 * For instance, RG16 native format without alpha works fine
1130 * on 2nd layer but XR24 (derived color format from AR24)
1131 * does not work on 2nd layer.
1133 ldev->caps.non_alpha_only_l1 = true;
1134 ldev->caps.pad_max_freq_hz = 90000000;
1135 if (ldev->caps.hw_version == HWVER_10200)
1136 ldev->caps.pad_max_freq_hz = 65000000;
1139 ldev->caps.reg_ofs = REG_OFS_4;
1140 ldev->caps.pix_fmt_hw = ltdc_pix_fmt_a1;
1141 ldev->caps.non_alpha_only_l1 = false;
1142 ldev->caps.pad_max_freq_hz = 150000000;
1151 void ltdc_suspend(struct drm_device *ddev)
1153 struct ltdc_device *ldev = ddev->dev_private;
1155 DRM_DEBUG_DRIVER("\n");
1156 clk_disable_unprepare(ldev->pixel_clk);
1159 int ltdc_resume(struct drm_device *ddev)
1161 struct ltdc_device *ldev = ddev->dev_private;
1164 DRM_DEBUG_DRIVER("\n");
1166 ret = clk_prepare_enable(ldev->pixel_clk);
1168 DRM_ERROR("failed to enable pixel clock (%d)\n", ret);
1175 int ltdc_load(struct drm_device *ddev)
1177 struct platform_device *pdev = to_platform_device(ddev->dev);
1178 struct ltdc_device *ldev = ddev->dev_private;
1179 struct device *dev = ddev->dev;
1180 struct device_node *np = dev->of_node;
1181 struct drm_bridge *bridge[MAX_ENDPOINTS] = {NULL};
1182 struct drm_panel *panel[MAX_ENDPOINTS] = {NULL};
1183 struct drm_crtc *crtc;
1184 struct reset_control *rstc;
1185 struct resource *res;
1186 int irq, ret, i, endpoint_not_ready = -ENODEV;
1188 DRM_DEBUG_DRIVER("\n");
1190 /* Get endpoints if any */
1191 for (i = 0; i < MAX_ENDPOINTS; i++) {
1192 ret = drm_of_find_panel_or_bridge(np, 0, i, &panel[i],
1196 * If at least one endpoint is -EPROBE_DEFER, defer probing,
1197 * else if at least one endpoint is ready, continue probing.
1199 if (ret == -EPROBE_DEFER)
1202 endpoint_not_ready = 0;
1205 if (endpoint_not_ready)
1206 return endpoint_not_ready;
1208 rstc = devm_reset_control_get_exclusive(dev, NULL);
1210 mutex_init(&ldev->err_lock);
1212 ldev->pixel_clk = devm_clk_get(dev, "lcd");
1213 if (IS_ERR(ldev->pixel_clk)) {
1214 if (PTR_ERR(ldev->pixel_clk) != -EPROBE_DEFER)
1215 DRM_ERROR("Unable to get lcd clock\n");
1216 return PTR_ERR(ldev->pixel_clk);
1219 if (clk_prepare_enable(ldev->pixel_clk)) {
1220 DRM_ERROR("Unable to prepare pixel clock\n");
1224 if (!IS_ERR(rstc)) {
1225 reset_control_assert(rstc);
1226 usleep_range(10, 20);
1227 reset_control_deassert(rstc);
1230 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1231 ldev->regs = devm_ioremap_resource(dev, res);
1232 if (IS_ERR(ldev->regs)) {
1233 DRM_ERROR("Unable to get ltdc registers\n");
1234 ret = PTR_ERR(ldev->regs);
1238 /* Disable interrupts */
1239 reg_clear(ldev->regs, LTDC_IER,
1240 IER_LIE | IER_RRIE | IER_FUIE | IER_TERRIE);
1242 for (i = 0; i < MAX_IRQ; i++) {
1243 irq = platform_get_irq(pdev, i);
1244 if (irq == -EPROBE_DEFER)
1250 ret = devm_request_threaded_irq(dev, irq, ltdc_irq,
1251 ltdc_irq_thread, IRQF_ONESHOT,
1252 dev_name(dev), ddev);
1254 DRM_ERROR("Failed to register LTDC interrupt\n");
1260 ret = ltdc_get_caps(ddev);
1262 DRM_ERROR("hardware identifier (0x%08x) not supported!\n",
1263 ldev->caps.hw_version);
1267 DRM_DEBUG_DRIVER("ltdc hw version 0x%08x\n", ldev->caps.hw_version);
1269 /* Add endpoints panels or bridges if any */
1270 for (i = 0; i < MAX_ENDPOINTS; i++) {
1272 bridge[i] = drm_panel_bridge_add_typed(panel[i],
1273 DRM_MODE_CONNECTOR_DPI);
1274 if (IS_ERR(bridge[i])) {
1275 DRM_ERROR("panel-bridge endpoint %d\n", i);
1276 ret = PTR_ERR(bridge[i]);
1282 ret = ltdc_encoder_init(ddev, bridge[i]);
1284 DRM_ERROR("init encoder endpoint %d\n", i);
1290 crtc = devm_kzalloc(dev, sizeof(*crtc), GFP_KERNEL);
1292 DRM_ERROR("Failed to allocate crtc\n");
1297 ddev->mode_config.allow_fb_modifiers = true;
1299 ret = ltdc_crtc_init(ddev, crtc);
1301 DRM_ERROR("Failed to init crtc\n");
1305 ret = drm_vblank_init(ddev, NB_CRTC);
1307 DRM_ERROR("Failed calling drm_vblank_init()\n");
1311 /* Allow usage of vblank without having to call drm_irq_install */
1312 ddev->irq_enabled = 1;
1314 clk_disable_unprepare(ldev->pixel_clk);
1316 pinctrl_pm_select_sleep_state(ddev->dev);
1318 pm_runtime_enable(ddev->dev);
1322 for (i = 0; i < MAX_ENDPOINTS; i++)
1323 drm_panel_bridge_remove(bridge[i]);
1325 clk_disable_unprepare(ldev->pixel_clk);
1330 void ltdc_unload(struct drm_device *ddev)
1334 DRM_DEBUG_DRIVER("\n");
1336 for (i = 0; i < MAX_ENDPOINTS; i++)
1337 drm_of_panel_bridge_remove(ddev->dev->of_node, 0, i);
1339 pm_runtime_disable(ddev->dev);
1346 MODULE_DESCRIPTION("STMicroelectronics ST DRM LTDC driver");
1347 MODULE_LICENSE("GPL v2");