2 * Copyright 2015 Freescale Semiconductor, Inc.
4 * Freescale DCU drm device driver
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/clk.h>
13 #include <linux/regmap.h>
16 #include <drm/drm_atomic.h>
17 #include <drm/drm_atomic_helper.h>
18 #include <drm/drm_crtc.h>
19 #include <drm/drm_probe_helper.h>
20 #include <video/videomode.h>
22 #include "fsl_dcu_drm_crtc.h"
23 #include "fsl_dcu_drm_drv.h"
24 #include "fsl_dcu_drm_plane.h"
26 static void fsl_dcu_drm_crtc_atomic_flush(struct drm_crtc *crtc,
27 struct drm_crtc_state *old_crtc_state)
29 struct drm_device *dev = crtc->dev;
30 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
31 struct drm_pending_vblank_event *event = crtc->state->event;
33 regmap_write(fsl_dev->regmap,
34 DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG);
37 crtc->state->event = NULL;
39 spin_lock_irq(&crtc->dev->event_lock);
40 if (drm_crtc_vblank_get(crtc) == 0)
41 drm_crtc_arm_vblank_event(crtc, event);
43 drm_crtc_send_vblank_event(crtc, event);
44 spin_unlock_irq(&crtc->dev->event_lock);
48 static void fsl_dcu_drm_crtc_atomic_disable(struct drm_crtc *crtc,
49 struct drm_crtc_state *old_crtc_state)
51 struct drm_device *dev = crtc->dev;
52 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
54 /* always disable planes on the CRTC */
55 drm_atomic_helper_disable_planes_on_crtc(old_crtc_state, true);
57 drm_crtc_vblank_off(crtc);
59 regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE,
60 DCU_MODE_DCU_MODE_MASK,
61 DCU_MODE_DCU_MODE(DCU_MODE_OFF));
62 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
63 DCU_UPDATE_MODE_READREG);
64 clk_disable_unprepare(fsl_dev->pix_clk);
67 static void fsl_dcu_drm_crtc_atomic_enable(struct drm_crtc *crtc,
68 struct drm_crtc_state *old_state)
70 struct drm_device *dev = crtc->dev;
71 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
73 clk_prepare_enable(fsl_dev->pix_clk);
74 regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE,
75 DCU_MODE_DCU_MODE_MASK,
76 DCU_MODE_DCU_MODE(DCU_MODE_NORMAL));
77 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
78 DCU_UPDATE_MODE_READREG);
80 drm_crtc_vblank_on(crtc);
83 static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
85 struct drm_device *dev = crtc->dev;
86 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
87 struct drm_connector *con = &fsl_dev->connector.base;
88 struct drm_display_mode *mode = &crtc->state->mode;
92 clk_set_rate(fsl_dev->pix_clk, mode->clock * 1000);
94 drm_display_mode_to_videomode(mode, &vm);
96 /* INV_PXCK as default (most display sample data on rising edge) */
97 if (!(con->display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE))
98 pol |= DCU_SYN_POL_INV_PXCK;
100 if (vm.flags & DISPLAY_FLAGS_HSYNC_LOW)
101 pol |= DCU_SYN_POL_INV_HS_LOW;
103 if (vm.flags & DISPLAY_FLAGS_VSYNC_LOW)
104 pol |= DCU_SYN_POL_INV_VS_LOW;
106 regmap_write(fsl_dev->regmap, DCU_HSYN_PARA,
107 DCU_HSYN_PARA_BP(vm.hback_porch) |
108 DCU_HSYN_PARA_PW(vm.hsync_len) |
109 DCU_HSYN_PARA_FP(vm.hfront_porch));
110 regmap_write(fsl_dev->regmap, DCU_VSYN_PARA,
111 DCU_VSYN_PARA_BP(vm.vback_porch) |
112 DCU_VSYN_PARA_PW(vm.vsync_len) |
113 DCU_VSYN_PARA_FP(vm.vfront_porch));
114 regmap_write(fsl_dev->regmap, DCU_DISP_SIZE,
115 DCU_DISP_SIZE_DELTA_Y(vm.vactive) |
116 DCU_DISP_SIZE_DELTA_X(vm.hactive));
117 regmap_write(fsl_dev->regmap, DCU_SYN_POL, pol);
118 regmap_write(fsl_dev->regmap, DCU_BGND, DCU_BGND_R(0) |
119 DCU_BGND_G(0) | DCU_BGND_B(0));
120 regmap_write(fsl_dev->regmap, DCU_DCU_MODE,
121 DCU_MODE_BLEND_ITER(1) | DCU_MODE_RASTER_EN);
122 regmap_write(fsl_dev->regmap, DCU_THRESHOLD,
123 DCU_THRESHOLD_LS_BF_VS(BF_VS_VAL) |
124 DCU_THRESHOLD_OUT_BUF_HIGH(BUF_MAX_VAL) |
125 DCU_THRESHOLD_OUT_BUF_LOW(BUF_MIN_VAL));
129 static const struct drm_crtc_helper_funcs fsl_dcu_drm_crtc_helper_funcs = {
130 .atomic_disable = fsl_dcu_drm_crtc_atomic_disable,
131 .atomic_flush = fsl_dcu_drm_crtc_atomic_flush,
132 .atomic_enable = fsl_dcu_drm_crtc_atomic_enable,
133 .mode_set_nofb = fsl_dcu_drm_crtc_mode_set_nofb,
136 static int fsl_dcu_drm_crtc_enable_vblank(struct drm_crtc *crtc)
138 struct drm_device *dev = crtc->dev;
139 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
142 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
143 value &= ~DCU_INT_MASK_VBLANK;
144 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
149 static void fsl_dcu_drm_crtc_disable_vblank(struct drm_crtc *crtc)
151 struct drm_device *dev = crtc->dev;
152 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
155 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
156 value |= DCU_INT_MASK_VBLANK;
157 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
160 static const struct drm_crtc_funcs fsl_dcu_drm_crtc_funcs = {
161 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
162 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
163 .destroy = drm_crtc_cleanup,
164 .page_flip = drm_atomic_helper_page_flip,
165 .reset = drm_atomic_helper_crtc_reset,
166 .set_config = drm_atomic_helper_set_config,
167 .enable_vblank = fsl_dcu_drm_crtc_enable_vblank,
168 .disable_vblank = fsl_dcu_drm_crtc_disable_vblank,
171 int fsl_dcu_drm_crtc_create(struct fsl_dcu_drm_device *fsl_dev)
173 struct drm_plane *primary;
174 struct drm_crtc *crtc = &fsl_dev->crtc;
177 fsl_dcu_drm_init_planes(fsl_dev->drm);
179 primary = fsl_dcu_drm_primary_create_plane(fsl_dev->drm);
183 ret = drm_crtc_init_with_planes(fsl_dev->drm, crtc, primary, NULL,
184 &fsl_dcu_drm_crtc_funcs, NULL);
186 primary->funcs->destroy(primary);
190 drm_crtc_helper_add(crtc, &fsl_dcu_drm_crtc_helper_funcs);