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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright 2015 Freescale Semiconductor, Inc.4 *5 * Freescale DCU drm device driver6 */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 else40 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