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 25static void fsl_dcu_drm_crtc_atomic_begin(struct drm_crtc *crtc, 26 struct drm_crtc_state *old_crtc_state) 27{ 28} 29 30static int fsl_dcu_drm_crtc_atomic_check(struct drm_crtc *crtc, 31 struct drm_crtc_state *state) 32{ 33 return 0; 34} 35 36static void fsl_dcu_drm_crtc_atomic_flush(struct drm_crtc *crtc, 37 struct drm_crtc_state *old_crtc_state) 38{ 39} 40 41static void fsl_dcu_drm_disable_crtc(struct drm_crtc *crtc) 42{ 43 struct drm_device *dev = crtc->dev; 44 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 45 int ret; 46 47 ret = regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, 48 DCU_MODE_DCU_MODE_MASK, 49 DCU_MODE_DCU_MODE(DCU_MODE_OFF)); 50 if (ret) 51 dev_err(fsl_dev->dev, "Disable CRTC failed\n"); 52 ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, 53 DCU_UPDATE_MODE_READREG); 54 if (ret) 55 dev_err(fsl_dev->dev, "Enable CRTC failed\n"); 56} 57 58static void fsl_dcu_drm_crtc_enable(struct drm_crtc *crtc) 59{ 60 struct drm_device *dev = crtc->dev; 61 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 62 int ret; 63 64 ret = regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, 65 DCU_MODE_DCU_MODE_MASK, 66 DCU_MODE_DCU_MODE(DCU_MODE_NORMAL)); 67 if (ret) 68 dev_err(fsl_dev->dev, "Enable CRTC failed\n"); 69 ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, 70 DCU_UPDATE_MODE_READREG); 71 if (ret) 72 dev_err(fsl_dev->dev, "Enable CRTC failed\n"); 73} 74 75static bool fsl_dcu_drm_crtc_mode_fixup(struct drm_crtc *crtc, 76 const struct drm_display_mode *mode, 77 struct drm_display_mode *adjusted_mode) 78{ 79 return true; 80} 81 82static 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_display_mode *mode = &crtc->state->mode; 87 unsigned int hbp, hfp, hsw, vbp, vfp, vsw, div, index; 88 unsigned long dcuclk; 89 int ret; 90 91 index = drm_crtc_index(crtc); 92 dcuclk = clk_get_rate(fsl_dev->clk); 93 div = dcuclk / mode->clock / 1000; 94 95 /* Configure timings: */ 96 hbp = mode->htotal - mode->hsync_end; 97 hfp = mode->hsync_start - mode->hdisplay; 98 hsw = mode->hsync_end - mode->hsync_start; 99 vbp = mode->vtotal - mode->vsync_end; 100 vfp = mode->vsync_start - mode->vdisplay; 101 vsw = mode->vsync_end - mode->vsync_start; 102 103 ret = regmap_write(fsl_dev->regmap, DCU_HSYN_PARA, 104 DCU_HSYN_PARA_BP(hbp) | 105 DCU_HSYN_PARA_PW(hsw) | 106 DCU_HSYN_PARA_FP(hfp)); 107 if (ret) 108 goto set_failed; 109 ret = regmap_write(fsl_dev->regmap, DCU_VSYN_PARA, 110 DCU_VSYN_PARA_BP(vbp) | 111 DCU_VSYN_PARA_PW(vsw) | 112 DCU_VSYN_PARA_FP(vfp)); 113 if (ret) 114 goto set_failed; 115 ret = regmap_write(fsl_dev->regmap, DCU_DISP_SIZE, 116 DCU_DISP_SIZE_DELTA_Y(mode->vdisplay) | 117 DCU_DISP_SIZE_DELTA_X(mode->hdisplay)); 118 if (ret) 119 goto set_failed; 120 ret = regmap_write(fsl_dev->regmap, DCU_DIV_RATIO, div); 121 if (ret) 122 goto set_failed; 123 ret = regmap_write(fsl_dev->regmap, DCU_SYN_POL, 124 DCU_SYN_POL_INV_VS_LOW | DCU_SYN_POL_INV_HS_LOW); 125 if (ret) 126 goto set_failed; 127 ret = regmap_write(fsl_dev->regmap, DCU_BGND, DCU_BGND_R(0) | 128 DCU_BGND_G(0) | DCU_BGND_B(0)); 129 if (ret) 130 goto set_failed; 131 ret = regmap_write(fsl_dev->regmap, DCU_DCU_MODE, 132 DCU_MODE_BLEND_ITER(1) | DCU_MODE_RASTER_EN); 133 if (ret) 134 goto set_failed; 135 ret = regmap_write(fsl_dev->regmap, DCU_THRESHOLD, 136 DCU_THRESHOLD_LS_BF_VS(BF_VS_VAL) | 137 DCU_THRESHOLD_OUT_BUF_HIGH(BUF_MAX_VAL) | 138 DCU_THRESHOLD_OUT_BUF_LOW(BUF_MIN_VAL)); 139 if (ret) 140 goto set_failed; 141 ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, 142 DCU_UPDATE_MODE_READREG); 143 if (ret) 144 goto set_failed; 145 return; 146set_failed: 147 dev_err(dev->dev, "set DCU register failed\n"); 148} 149 150static const struct drm_crtc_helper_funcs fsl_dcu_drm_crtc_helper_funcs = { 151 .atomic_begin = fsl_dcu_drm_crtc_atomic_begin, 152 .atomic_check = fsl_dcu_drm_crtc_atomic_check, 153 .atomic_flush = fsl_dcu_drm_crtc_atomic_flush, 154 .disable = fsl_dcu_drm_disable_crtc, 155 .enable = fsl_dcu_drm_crtc_enable, 156 .mode_fixup = fsl_dcu_drm_crtc_mode_fixup, 157 .mode_set_nofb = fsl_dcu_drm_crtc_mode_set_nofb, 158}; 159 160static 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}; 168 169int fsl_dcu_drm_crtc_create(struct fsl_dcu_drm_device *fsl_dev) 170{ 171 struct drm_plane *primary; 172 struct drm_crtc *crtc = &fsl_dev->crtc; 173 unsigned int i, j, reg_num; 174 int ret; 175 176 primary = fsl_dcu_drm_primary_create_plane(fsl_dev->drm); 177 ret = drm_crtc_init_with_planes(fsl_dev->drm, crtc, primary, NULL, 178 &fsl_dcu_drm_crtc_funcs); 179 if (ret < 0) 180 return ret; 181 182 drm_crtc_helper_add(crtc, &fsl_dcu_drm_crtc_helper_funcs); 183 184 if (!strcmp(fsl_dev->soc->name, "ls1021a")) 185 reg_num = LS1021A_LAYER_REG_NUM; 186 else 187 reg_num = VF610_LAYER_REG_NUM; 188 for (i = 0; i <= fsl_dev->soc->total_layer; i++) { 189 for (j = 0; j < reg_num; j++) { 190 ret = regmap_write(fsl_dev->regmap, 191 DCU_CTRLDESCLN(i, j), 0); 192 if (ret) 193 goto init_failed; 194 } 195 } 196 ret = regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, 197 DCU_MODE_DCU_MODE_MASK, 198 DCU_MODE_DCU_MODE(DCU_MODE_OFF)); 199 if (ret) 200 goto init_failed; 201 ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, 202 DCU_UPDATE_MODE_READREG); 203 if (ret) 204 goto init_failed; 205 206 return 0; 207init_failed: 208 dev_err(fsl_dev->dev, "init DCU register failed\n"); 209 return ret; 210} 211