1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright 2015 Freescale Semiconductor, Inc. 4 * 5 * Freescale DCU drm device driver 6 */ 7 8#include <linux/clk.h> 9#include <linux/regmap.h> 10 11#include <video/videomode.h> 12 13#include <drm/drm_atomic.h> 14#include <drm/drm_atomic_helper.h> 15#include <drm/drm_crtc.h> 16#include <drm/drm_probe_helper.h> 17#include <drm/drm_vblank.h> 18 19#include "fsl_dcu_drm_crtc.h" 20#include "fsl_dcu_drm_drv.h" 21#include "fsl_dcu_drm_plane.h" 22 23static void fsl_dcu_drm_crtc_atomic_flush(struct drm_crtc *crtc, 24 struct drm_atomic_state *state) 25{ 26 struct drm_device *dev = crtc->dev; 27 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 28 struct drm_pending_vblank_event *event = crtc->state->event; 29 30 regmap_write(fsl_dev->regmap, 31 DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG); 32 33 if (event) { 34 crtc->state->event = NULL; 35 36 spin_lock_irq(&crtc->dev->event_lock); 37 if (drm_crtc_vblank_get(crtc) == 0) 38 drm_crtc_arm_vblank_event(crtc, event); 39 else 40 drm_crtc_send_vblank_event(crtc, event); 41 spin_unlock_irq(&crtc->dev->event_lock); 42 } 43} 44 45static void fsl_dcu_drm_crtc_atomic_disable(struct drm_crtc *crtc, 46 struct drm_atomic_state *state) 47{ 48 struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, 49 crtc); 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 66static void fsl_dcu_drm_crtc_atomic_enable(struct drm_crtc *crtc, 67 struct drm_atomic_state *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 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_connector *con = &fsl_dev->connector.base; 87 struct drm_display_mode *mode = &crtc->state->mode; 88 unsigned int pol = 0; 89 struct videomode vm; 90 91 clk_set_rate(fsl_dev->pix_clk, mode->clock * 1000); 92 93 drm_display_mode_to_videomode(mode, &vm); 94 95 /* INV_PXCK as default (most display sample data on rising edge) */ 96 if (!(con->display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)) 97 pol |= DCU_SYN_POL_INV_PXCK; 98 99 if (vm.flags & DISPLAY_FLAGS_HSYNC_LOW) 100 pol |= DCU_SYN_POL_INV_HS_LOW; 101 102 if (vm.flags & DISPLAY_FLAGS_VSYNC_LOW) 103 pol |= DCU_SYN_POL_INV_VS_LOW; 104 105 regmap_write(fsl_dev->regmap, DCU_HSYN_PARA, 106 DCU_HSYN_PARA_BP(vm.hback_porch) | 107 DCU_HSYN_PARA_PW(vm.hsync_len) | 108 DCU_HSYN_PARA_FP(vm.hfront_porch)); 109 regmap_write(fsl_dev->regmap, DCU_VSYN_PARA, 110 DCU_VSYN_PARA_BP(vm.vback_porch) | 111 DCU_VSYN_PARA_PW(vm.vsync_len) | 112 DCU_VSYN_PARA_FP(vm.vfront_porch)); 113 regmap_write(fsl_dev->regmap, DCU_DISP_SIZE, 114 DCU_DISP_SIZE_DELTA_Y(vm.vactive) | 115 DCU_DISP_SIZE_DELTA_X(vm.hactive)); 116 regmap_write(fsl_dev->regmap, DCU_SYN_POL, pol); 117 regmap_write(fsl_dev->regmap, DCU_BGND, DCU_BGND_R(0) | 118 DCU_BGND_G(0) | DCU_BGND_B(0)); 119 regmap_write(fsl_dev->regmap, DCU_DCU_MODE, 120 DCU_MODE_BLEND_ITER(1) | DCU_MODE_RASTER_EN); 121 regmap_write(fsl_dev->regmap, DCU_THRESHOLD, 122 DCU_THRESHOLD_LS_BF_VS(BF_VS_VAL) | 123 DCU_THRESHOLD_OUT_BUF_HIGH(BUF_MAX_VAL) | 124 DCU_THRESHOLD_OUT_BUF_LOW(BUF_MIN_VAL)); 125 return; 126} 127 128static const struct drm_crtc_helper_funcs fsl_dcu_drm_crtc_helper_funcs = { 129 .atomic_disable = fsl_dcu_drm_crtc_atomic_disable, 130 .atomic_flush = fsl_dcu_drm_crtc_atomic_flush, 131 .atomic_enable = fsl_dcu_drm_crtc_atomic_enable, 132 .mode_set_nofb = fsl_dcu_drm_crtc_mode_set_nofb, 133}; 134 135static int fsl_dcu_drm_crtc_enable_vblank(struct drm_crtc *crtc) 136{ 137 struct drm_device *dev = crtc->dev; 138 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 139 unsigned int value; 140 141 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); 142 value &= ~DCU_INT_MASK_VBLANK; 143 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); 144 145 return 0; 146} 147 148static void fsl_dcu_drm_crtc_disable_vblank(struct drm_crtc *crtc) 149{ 150 struct drm_device *dev = crtc->dev; 151 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 152 unsigned int value; 153 154 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); 155 value |= DCU_INT_MASK_VBLANK; 156 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); 157} 158 159static const struct drm_crtc_funcs fsl_dcu_drm_crtc_funcs = { 160 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 161 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 162 .destroy = drm_crtc_cleanup, 163 .page_flip = drm_atomic_helper_page_flip, 164 .reset = drm_atomic_helper_crtc_reset, 165 .set_config = drm_atomic_helper_set_config, 166 .enable_vblank = fsl_dcu_drm_crtc_enable_vblank, 167 .disable_vblank = fsl_dcu_drm_crtc_disable_vblank, 168}; 169 170int fsl_dcu_drm_crtc_create(struct fsl_dcu_drm_device *fsl_dev) 171{ 172 struct drm_plane *primary; 173 struct drm_crtc *crtc = &fsl_dev->crtc; 174 int ret; 175 176 fsl_dcu_drm_init_planes(fsl_dev->drm); 177 178 primary = fsl_dcu_drm_primary_create_plane(fsl_dev->drm); 179 if (!primary) 180 return -ENOMEM; 181 182 ret = drm_crtc_init_with_planes(fsl_dev->drm, crtc, primary, NULL, 183 &fsl_dcu_drm_crtc_funcs, NULL); 184 if (ret) { 185 primary->funcs->destroy(primary); 186 return ret; 187 } 188 189 drm_crtc_helper_add(crtc, &fsl_dcu_drm_crtc_helper_funcs); 190 191 return 0; 192} 193