// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2015 Freescale Semiconductor, Inc. * * Freescale DCU drm device driver */ #include <linux/clk.h> #include <linux/regmap.h> #include <video/videomode.h> #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> #include <drm/drm_probe_helper.h> #include <drm/drm_vblank.h> #include "fsl_dcu_drm_crtc.h" #include "fsl_dcu_drm_drv.h" #include "fsl_dcu_drm_plane.h" static void fsl_dcu_drm_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_crtc_state *old_crtc_state) { struct drm_device *dev = crtc->dev; struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; struct drm_pending_vblank_event *event = crtc->state->event; regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG); if (event) { crtc->state->event = NULL; spin_lock_irq(&crtc->dev->event_lock); if (drm_crtc_vblank_get(crtc) == 0) drm_crtc_arm_vblank_event(crtc, event); else drm_crtc_send_vblank_event(crtc, event); spin_unlock_irq(&crtc->dev->event_lock); } } static void fsl_dcu_drm_crtc_atomic_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_crtc_state) { struct drm_device *dev = crtc->dev; struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; /* always disable planes on the CRTC */ drm_atomic_helper_disable_planes_on_crtc(old_crtc_state, true); drm_crtc_vblank_off(crtc); regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, DCU_MODE_DCU_MODE_MASK, DCU_MODE_DCU_MODE(DCU_MODE_OFF)); regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG); clk_disable_unprepare(fsl_dev->pix_clk); } static void fsl_dcu_drm_crtc_atomic_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state) { struct drm_device *dev = crtc->dev; struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; clk_prepare_enable(fsl_dev->pix_clk); regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, DCU_MODE_DCU_MODE_MASK, DCU_MODE_DCU_MODE(DCU_MODE_NORMAL)); regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG); drm_crtc_vblank_on(crtc); } static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; struct drm_connector *con = &fsl_dev->connector.base; struct drm_display_mode *mode = &crtc->state->mode; unsigned int pol = 0; struct videomode vm; clk_set_rate(fsl_dev->pix_clk, mode->clock * 1000); drm_display_mode_to_videomode(mode, &vm); /* INV_PXCK as default (most display sample data on rising edge) */ if (!(con->display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)) pol |= DCU_SYN_POL_INV_PXCK; if (vm.flags & DISPLAY_FLAGS_HSYNC_LOW) pol |= DCU_SYN_POL_INV_HS_LOW; if (vm.flags & DISPLAY_FLAGS_VSYNC_LOW) pol |= DCU_SYN_POL_INV_VS_LOW; regmap_write(fsl_dev->regmap, DCU_HSYN_PARA, DCU_HSYN_PARA_BP(vm.hback_porch) | DCU_HSYN_PARA_PW(vm.hsync_len) | DCU_HSYN_PARA_FP(vm.hfront_porch)); regmap_write(fsl_dev->regmap, DCU_VSYN_PARA, DCU_VSYN_PARA_BP(vm.vback_porch) | DCU_VSYN_PARA_PW(vm.vsync_len) | DCU_VSYN_PARA_FP(vm.vfront_porch)); regmap_write(fsl_dev->regmap, DCU_DISP_SIZE, DCU_DISP_SIZE_DELTA_Y(vm.vactive) | DCU_DISP_SIZE_DELTA_X(vm.hactive)); regmap_write(fsl_dev->regmap, DCU_SYN_POL, pol); regmap_write(fsl_dev->regmap, DCU_BGND, DCU_BGND_R(0) | DCU_BGND_G(0) | DCU_BGND_B(0)); regmap_write(fsl_dev->regmap, DCU_DCU_MODE, DCU_MODE_BLEND_ITER(1) | DCU_MODE_RASTER_EN); regmap_write(fsl_dev->regmap, DCU_THRESHOLD, DCU_THRESHOLD_LS_BF_VS(BF_VS_VAL) | DCU_THRESHOLD_OUT_BUF_HIGH(BUF_MAX_VAL) | DCU_THRESHOLD_OUT_BUF_LOW(BUF_MIN_VAL)); return; } static const struct drm_crtc_helper_funcs fsl_dcu_drm_crtc_helper_funcs = { .atomic_disable = fsl_dcu_drm_crtc_atomic_disable, .atomic_flush = fsl_dcu_drm_crtc_atomic_flush, .atomic_enable = fsl_dcu_drm_crtc_atomic_enable, .mode_set_nofb = fsl_dcu_drm_crtc_mode_set_nofb, }; static int fsl_dcu_drm_crtc_enable_vblank(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; unsigned int value; regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); value &= ~DCU_INT_MASK_VBLANK; regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); return 0; } static void fsl_dcu_drm_crtc_disable_vblank(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; unsigned int value; regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); value |= DCU_INT_MASK_VBLANK; regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); } static const struct drm_crtc_funcs fsl_dcu_drm_crtc_funcs = { .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, .destroy = drm_crtc_cleanup, .page_flip = drm_atomic_helper_page_flip, .reset = drm_atomic_helper_crtc_reset, .set_config = drm_atomic_helper_set_config, .enable_vblank = fsl_dcu_drm_crtc_enable_vblank, .disable_vblank = fsl_dcu_drm_crtc_disable_vblank, }; int fsl_dcu_drm_crtc_create(struct fsl_dcu_drm_device *fsl_dev) { struct drm_plane *primary; struct drm_crtc *crtc = &fsl_dev->crtc; int ret; fsl_dcu_drm_init_planes(fsl_dev->drm); primary = fsl_dcu_drm_primary_create_plane(fsl_dev->drm); if (!primary) return -ENOMEM; ret = drm_crtc_init_with_planes(fsl_dev->drm, crtc, primary, NULL, &fsl_dcu_drm_crtc_funcs, NULL); if (ret) { primary->funcs->destroy(primary); return ret; } drm_crtc_helper_add(crtc, &fsl_dcu_drm_crtc_helper_funcs); return 0; }