1 /* 2 * Copyright 2015 Freescale Semiconductor, Inc. 3 * 4 * Freescale DCU drm device driver 5 * 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. 10 */ 11 12 #include <linux/clk.h> 13 #include <linux/regmap.h> 14 15 #include <drm/drmP.h> 16 #include <drm/drm_atomic.h> 17 #include <drm/drm_atomic_helper.h> 18 #include <drm/drm_crtc.h> 19 #include <drm/drm_crtc_helper.h> 20 21 #include "fsl_dcu_drm_crtc.h" 22 #include "fsl_dcu_drm_drv.h" 23 #include "fsl_dcu_drm_plane.h" 24 25 static void fsl_dcu_drm_crtc_atomic_flush(struct drm_crtc *crtc, 26 struct drm_crtc_state *old_crtc_state) 27 { 28 struct drm_device *dev = crtc->dev; 29 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 30 struct drm_pending_vblank_event *event = crtc->state->event; 31 32 regmap_write(fsl_dev->regmap, 33 DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG); 34 35 if (event) { 36 crtc->state->event = NULL; 37 38 spin_lock_irq(&crtc->dev->event_lock); 39 if (drm_crtc_vblank_get(crtc) == 0) 40 drm_crtc_arm_vblank_event(crtc, event); 41 else 42 drm_crtc_send_vblank_event(crtc, event); 43 spin_unlock_irq(&crtc->dev->event_lock); 44 } 45 } 46 47 static void fsl_dcu_drm_crtc_atomic_disable(struct drm_crtc *crtc, 48 struct drm_crtc_state *old_crtc_state) 49 { 50 struct drm_device *dev = crtc->dev; 51 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 52 53 /* always disable planes on the CRTC */ 54 drm_atomic_helper_disable_planes_on_crtc(old_crtc_state, true); 55 56 drm_crtc_vblank_off(crtc); 57 58 regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, 59 DCU_MODE_DCU_MODE_MASK, 60 DCU_MODE_DCU_MODE(DCU_MODE_OFF)); 61 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, 62 DCU_UPDATE_MODE_READREG); 63 clk_disable_unprepare(fsl_dev->pix_clk); 64 } 65 66 static void fsl_dcu_drm_crtc_atomic_enable(struct drm_crtc *crtc, 67 struct drm_crtc_state *old_state) 68 { 69 struct drm_device *dev = crtc->dev; 70 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 71 72 clk_prepare_enable(fsl_dev->pix_clk); 73 regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, 74 DCU_MODE_DCU_MODE_MASK, 75 DCU_MODE_DCU_MODE(DCU_MODE_NORMAL)); 76 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, 77 DCU_UPDATE_MODE_READREG); 78 79 drm_crtc_vblank_on(crtc); 80 } 81 82 static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc) 83 { 84 struct drm_device *dev = crtc->dev; 85 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 86 struct drm_connector *con = &fsl_dev->connector.base; 87 struct drm_display_mode *mode = &crtc->state->mode; 88 unsigned int hbp, hfp, hsw, vbp, vfp, vsw, index, pol = 0; 89 90 index = drm_crtc_index(crtc); 91 clk_set_rate(fsl_dev->pix_clk, mode->clock * 1000); 92 93 /* Configure timings: */ 94 hbp = mode->htotal - mode->hsync_end; 95 hfp = mode->hsync_start - mode->hdisplay; 96 hsw = mode->hsync_end - mode->hsync_start; 97 vbp = mode->vtotal - mode->vsync_end; 98 vfp = mode->vsync_start - mode->vdisplay; 99 vsw = mode->vsync_end - mode->vsync_start; 100 101 /* INV_PXCK as default (most display sample data on rising edge) */ 102 if (!(con->display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE)) 103 pol |= DCU_SYN_POL_INV_PXCK; 104 105 if (mode->flags & DRM_MODE_FLAG_NHSYNC) 106 pol |= DCU_SYN_POL_INV_HS_LOW; 107 108 if (mode->flags & DRM_MODE_FLAG_NVSYNC) 109 pol |= DCU_SYN_POL_INV_VS_LOW; 110 111 regmap_write(fsl_dev->regmap, DCU_HSYN_PARA, 112 DCU_HSYN_PARA_BP(hbp) | 113 DCU_HSYN_PARA_PW(hsw) | 114 DCU_HSYN_PARA_FP(hfp)); 115 regmap_write(fsl_dev->regmap, DCU_VSYN_PARA, 116 DCU_VSYN_PARA_BP(vbp) | 117 DCU_VSYN_PARA_PW(vsw) | 118 DCU_VSYN_PARA_FP(vfp)); 119 regmap_write(fsl_dev->regmap, DCU_DISP_SIZE, 120 DCU_DISP_SIZE_DELTA_Y(mode->vdisplay) | 121 DCU_DISP_SIZE_DELTA_X(mode->hdisplay)); 122 regmap_write(fsl_dev->regmap, DCU_SYN_POL, pol); 123 regmap_write(fsl_dev->regmap, DCU_BGND, DCU_BGND_R(0) | 124 DCU_BGND_G(0) | DCU_BGND_B(0)); 125 regmap_write(fsl_dev->regmap, DCU_DCU_MODE, 126 DCU_MODE_BLEND_ITER(1) | DCU_MODE_RASTER_EN); 127 regmap_write(fsl_dev->regmap, DCU_THRESHOLD, 128 DCU_THRESHOLD_LS_BF_VS(BF_VS_VAL) | 129 DCU_THRESHOLD_OUT_BUF_HIGH(BUF_MAX_VAL) | 130 DCU_THRESHOLD_OUT_BUF_LOW(BUF_MIN_VAL)); 131 return; 132 } 133 134 static const struct drm_crtc_helper_funcs fsl_dcu_drm_crtc_helper_funcs = { 135 .atomic_disable = fsl_dcu_drm_crtc_atomic_disable, 136 .atomic_flush = fsl_dcu_drm_crtc_atomic_flush, 137 .atomic_enable = fsl_dcu_drm_crtc_atomic_enable, 138 .mode_set_nofb = fsl_dcu_drm_crtc_mode_set_nofb, 139 }; 140 141 static int fsl_dcu_drm_crtc_enable_vblank(struct drm_crtc *crtc) 142 { 143 struct drm_device *dev = crtc->dev; 144 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 145 unsigned int value; 146 147 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); 148 value &= ~DCU_INT_MASK_VBLANK; 149 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); 150 151 return 0; 152 } 153 154 static void fsl_dcu_drm_crtc_disable_vblank(struct drm_crtc *crtc) 155 { 156 struct drm_device *dev = crtc->dev; 157 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 158 unsigned int value; 159 160 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); 161 value |= DCU_INT_MASK_VBLANK; 162 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); 163 } 164 165 static const struct drm_crtc_funcs fsl_dcu_drm_crtc_funcs = { 166 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 167 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 168 .destroy = drm_crtc_cleanup, 169 .page_flip = drm_atomic_helper_page_flip, 170 .reset = drm_atomic_helper_crtc_reset, 171 .set_config = drm_atomic_helper_set_config, 172 .enable_vblank = fsl_dcu_drm_crtc_enable_vblank, 173 .disable_vblank = fsl_dcu_drm_crtc_disable_vblank, 174 }; 175 176 int fsl_dcu_drm_crtc_create(struct fsl_dcu_drm_device *fsl_dev) 177 { 178 struct drm_plane *primary; 179 struct drm_crtc *crtc = &fsl_dev->crtc; 180 int ret; 181 182 fsl_dcu_drm_init_planes(fsl_dev->drm); 183 184 primary = fsl_dcu_drm_primary_create_plane(fsl_dev->drm); 185 if (!primary) 186 return -ENOMEM; 187 188 ret = drm_crtc_init_with_planes(fsl_dev->drm, crtc, primary, NULL, 189 &fsl_dcu_drm_crtc_funcs, NULL); 190 if (ret) { 191 primary->funcs->destroy(primary); 192 return ret; 193 } 194 195 drm_crtc_helper_add(crtc, &fsl_dcu_drm_crtc_helper_funcs); 196 197 return 0; 198 } 199