| /* |
| * Copyright (C) 2014 Traphandler |
| * Copyright (C) 2014 Free Electrons |
| * |
| * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com> |
| * Author: Boris BREZILLON <boris.brezillon@free-electrons.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published by |
| * the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/pm.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/pinctrl/consumer.h> |
| |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drmP.h> |
| |
| #include <video/videomode.h> |
| |
| #include "atmel_hlcdc_dc.h" |
| |
| /** |
| * Atmel HLCDC CRTC state structure |
| * |
| * @base: base CRTC state |
| * @output_mode: RGBXXX output mode |
| */ |
| struct atmel_hlcdc_crtc_state { |
| struct drm_crtc_state base; |
| unsigned int output_mode; |
| }; |
| |
| static inline struct atmel_hlcdc_crtc_state * |
| drm_crtc_state_to_atmel_hlcdc_crtc_state(struct drm_crtc_state *state) |
| { |
| return container_of(state, struct atmel_hlcdc_crtc_state, base); |
| } |
| |
| /** |
| * Atmel HLCDC CRTC structure |
| * |
| * @base: base DRM CRTC structure |
| * @hlcdc: pointer to the atmel_hlcdc structure provided by the MFD device |
| * @event: pointer to the current page flip event |
| * @id: CRTC id (returned by drm_crtc_index) |
| */ |
| struct atmel_hlcdc_crtc { |
| struct drm_crtc base; |
| struct atmel_hlcdc_dc *dc; |
| struct drm_pending_vblank_event *event; |
| int id; |
| }; |
| |
| static inline struct atmel_hlcdc_crtc * |
| drm_crtc_to_atmel_hlcdc_crtc(struct drm_crtc *crtc) |
| { |
| return container_of(crtc, struct atmel_hlcdc_crtc, base); |
| } |
| |
| static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c) |
| { |
| struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c); |
| struct regmap *regmap = crtc->dc->hlcdc->regmap; |
| struct drm_display_mode *adj = &c->state->adjusted_mode; |
| struct atmel_hlcdc_crtc_state *state; |
| unsigned long mode_rate; |
| struct videomode vm; |
| unsigned long prate; |
| unsigned int cfg; |
| int div; |
| |
| vm.vfront_porch = adj->crtc_vsync_start - adj->crtc_vdisplay; |
| vm.vback_porch = adj->crtc_vtotal - adj->crtc_vsync_end; |
| vm.vsync_len = adj->crtc_vsync_end - adj->crtc_vsync_start; |
| vm.hfront_porch = adj->crtc_hsync_start - adj->crtc_hdisplay; |
| vm.hback_porch = adj->crtc_htotal - adj->crtc_hsync_end; |
| vm.hsync_len = adj->crtc_hsync_end - adj->crtc_hsync_start; |
| |
| regmap_write(regmap, ATMEL_HLCDC_CFG(1), |
| (vm.hsync_len - 1) | ((vm.vsync_len - 1) << 16)); |
| |
| regmap_write(regmap, ATMEL_HLCDC_CFG(2), |
| (vm.vfront_porch - 1) | (vm.vback_porch << 16)); |
| |
| regmap_write(regmap, ATMEL_HLCDC_CFG(3), |
| (vm.hfront_porch - 1) | ((vm.hback_porch - 1) << 16)); |
| |
| regmap_write(regmap, ATMEL_HLCDC_CFG(4), |
| (adj->crtc_hdisplay - 1) | |
| ((adj->crtc_vdisplay - 1) << 16)); |
| |
| cfg = 0; |
| |
| prate = clk_get_rate(crtc->dc->hlcdc->sys_clk); |
| mode_rate = adj->crtc_clock * 1000; |
| if ((prate / 2) < mode_rate) { |
| prate *= 2; |
| cfg |= ATMEL_HLCDC_CLKSEL; |
| } |
| |
| div = DIV_ROUND_UP(prate, mode_rate); |
| if (div < 2) |
| div = 2; |
| |
| cfg |= ATMEL_HLCDC_CLKDIV(div); |
| |
| regmap_update_bits(regmap, ATMEL_HLCDC_CFG(0), |
| ATMEL_HLCDC_CLKSEL | ATMEL_HLCDC_CLKDIV_MASK | |
| ATMEL_HLCDC_CLKPOL, cfg); |
| |
| cfg = 0; |
| |
| if (adj->flags & DRM_MODE_FLAG_NVSYNC) |
| cfg |= ATMEL_HLCDC_VSPOL; |
| |
| if (adj->flags & DRM_MODE_FLAG_NHSYNC) |
| cfg |= ATMEL_HLCDC_HSPOL; |
| |
| state = drm_crtc_state_to_atmel_hlcdc_crtc_state(c->state); |
| cfg |= state->output_mode << 8; |
| |
| regmap_update_bits(regmap, ATMEL_HLCDC_CFG(5), |
| ATMEL_HLCDC_HSPOL | ATMEL_HLCDC_VSPOL | |
| ATMEL_HLCDC_VSPDLYS | ATMEL_HLCDC_VSPDLYE | |
| ATMEL_HLCDC_DISPPOL | ATMEL_HLCDC_DISPDLY | |
| ATMEL_HLCDC_VSPSU | ATMEL_HLCDC_VSPHO | |
| ATMEL_HLCDC_GUARDTIME_MASK | ATMEL_HLCDC_MODE_MASK, |
| cfg); |
| } |
| |
| static enum drm_mode_status |
| atmel_hlcdc_crtc_mode_valid(struct drm_crtc *c, |
| const struct drm_display_mode *mode) |
| { |
| struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c); |
| |
| return atmel_hlcdc_dc_mode_valid(crtc->dc, mode); |
| } |
| |
| static void atmel_hlcdc_crtc_disable(struct drm_crtc *c) |
| { |
| struct drm_device *dev = c->dev; |
| struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c); |
| struct regmap *regmap = crtc->dc->hlcdc->regmap; |
| unsigned int status; |
| |
| drm_crtc_vblank_off(c); |
| |
| pm_runtime_get_sync(dev->dev); |
| |
| regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_DISP); |
| while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) && |
| (status & ATMEL_HLCDC_DISP)) |
| cpu_relax(); |
| |
| regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_SYNC); |
| while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) && |
| (status & ATMEL_HLCDC_SYNC)) |
| cpu_relax(); |
| |
| regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_PIXEL_CLK); |
| while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) && |
| (status & ATMEL_HLCDC_PIXEL_CLK)) |
| cpu_relax(); |
| |
| clk_disable_unprepare(crtc->dc->hlcdc->sys_clk); |
| pinctrl_pm_select_sleep_state(dev->dev); |
| |
| pm_runtime_allow(dev->dev); |
| |
| pm_runtime_put_sync(dev->dev); |
| } |
| |
| static void atmel_hlcdc_crtc_enable(struct drm_crtc *c) |
| { |
| struct drm_device *dev = c->dev; |
| struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c); |
| struct regmap *regmap = crtc->dc->hlcdc->regmap; |
| unsigned int status; |
| |
| pm_runtime_get_sync(dev->dev); |
| |
| pm_runtime_forbid(dev->dev); |
| |
| pinctrl_pm_select_default_state(dev->dev); |
| clk_prepare_enable(crtc->dc->hlcdc->sys_clk); |
| |
| regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_PIXEL_CLK); |
| while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) && |
| !(status & ATMEL_HLCDC_PIXEL_CLK)) |
| cpu_relax(); |
| |
| |
| regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_SYNC); |
| while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) && |
| !(status & ATMEL_HLCDC_SYNC)) |
| cpu_relax(); |
| |
| regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_DISP); |
| while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) && |
| !(status & ATMEL_HLCDC_DISP)) |
| cpu_relax(); |
| |
| pm_runtime_put_sync(dev->dev); |
| |
| drm_crtc_vblank_on(c); |
| } |
| |
| #define ATMEL_HLCDC_RGB444_OUTPUT BIT(0) |
| #define ATMEL_HLCDC_RGB565_OUTPUT BIT(1) |
| #define ATMEL_HLCDC_RGB666_OUTPUT BIT(2) |
| #define ATMEL_HLCDC_RGB888_OUTPUT BIT(3) |
| #define ATMEL_HLCDC_OUTPUT_MODE_MASK GENMASK(3, 0) |
| |
| static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state) |
| { |
| unsigned int output_fmts = ATMEL_HLCDC_OUTPUT_MODE_MASK; |
| struct atmel_hlcdc_crtc_state *hstate; |
| struct drm_connector_state *cstate; |
| struct drm_connector *connector; |
| struct atmel_hlcdc_crtc *crtc; |
| int i; |
| |
| crtc = drm_crtc_to_atmel_hlcdc_crtc(state->crtc); |
| |
| for_each_connector_in_state(state->state, connector, cstate, i) { |
| struct drm_display_info *info = &connector->display_info; |
| unsigned int supported_fmts = 0; |
| int j; |
| |
| if (!cstate->crtc) |
| continue; |
| |
| for (j = 0; j < info->num_bus_formats; j++) { |
| switch (info->bus_formats[j]) { |
| case MEDIA_BUS_FMT_RGB444_1X12: |
| supported_fmts |= ATMEL_HLCDC_RGB444_OUTPUT; |
| break; |
| case MEDIA_BUS_FMT_RGB565_1X16: |
| supported_fmts |= ATMEL_HLCDC_RGB565_OUTPUT; |
| break; |
| case MEDIA_BUS_FMT_RGB666_1X18: |
| supported_fmts |= ATMEL_HLCDC_RGB666_OUTPUT; |
| break; |
| case MEDIA_BUS_FMT_RGB888_1X24: |
| supported_fmts |= ATMEL_HLCDC_RGB888_OUTPUT; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (crtc->dc->desc->conflicting_output_formats) |
| output_fmts &= supported_fmts; |
| else |
| output_fmts |= supported_fmts; |
| } |
| |
| if (!output_fmts) |
| return -EINVAL; |
| |
| hstate = drm_crtc_state_to_atmel_hlcdc_crtc_state(state); |
| hstate->output_mode = fls(output_fmts) - 1; |
| |
| return 0; |
| } |
| |
| static int atmel_hlcdc_crtc_atomic_check(struct drm_crtc *c, |
| struct drm_crtc_state *s) |
| { |
| int ret; |
| |
| ret = atmel_hlcdc_crtc_select_output_mode(s); |
| if (ret) |
| return ret; |
| |
| ret = atmel_hlcdc_plane_prepare_disc_area(s); |
| if (ret) |
| return ret; |
| |
| return atmel_hlcdc_plane_prepare_ahb_routing(s); |
| } |
| |
| static void atmel_hlcdc_crtc_atomic_begin(struct drm_crtc *c, |
| struct drm_crtc_state *old_s) |
| { |
| struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c); |
| |
| if (c->state->event) { |
| c->state->event->pipe = drm_crtc_index(c); |
| |
| WARN_ON(drm_crtc_vblank_get(c) != 0); |
| |
| crtc->event = c->state->event; |
| c->state->event = NULL; |
| } |
| } |
| |
| static void atmel_hlcdc_crtc_atomic_flush(struct drm_crtc *crtc, |
| struct drm_crtc_state *old_s) |
| { |
| /* TODO: write common plane control register if available */ |
| } |
| |
| static const struct drm_crtc_helper_funcs lcdc_crtc_helper_funcs = { |
| .mode_valid = atmel_hlcdc_crtc_mode_valid, |
| .mode_set = drm_helper_crtc_mode_set, |
| .mode_set_nofb = atmel_hlcdc_crtc_mode_set_nofb, |
| .mode_set_base = drm_helper_crtc_mode_set_base, |
| .disable = atmel_hlcdc_crtc_disable, |
| .enable = atmel_hlcdc_crtc_enable, |
| .atomic_check = atmel_hlcdc_crtc_atomic_check, |
| .atomic_begin = atmel_hlcdc_crtc_atomic_begin, |
| .atomic_flush = atmel_hlcdc_crtc_atomic_flush, |
| }; |
| |
| static void atmel_hlcdc_crtc_destroy(struct drm_crtc *c) |
| { |
| struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c); |
| |
| drm_crtc_cleanup(c); |
| kfree(crtc); |
| } |
| |
| static void atmel_hlcdc_crtc_finish_page_flip(struct atmel_hlcdc_crtc *crtc) |
| { |
| struct drm_device *dev = crtc->base.dev; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev->event_lock, flags); |
| if (crtc->event) { |
| drm_crtc_send_vblank_event(&crtc->base, crtc->event); |
| drm_crtc_vblank_put(&crtc->base); |
| crtc->event = NULL; |
| } |
| spin_unlock_irqrestore(&dev->event_lock, flags); |
| } |
| |
| void atmel_hlcdc_crtc_irq(struct drm_crtc *c) |
| { |
| drm_crtc_handle_vblank(c); |
| atmel_hlcdc_crtc_finish_page_flip(drm_crtc_to_atmel_hlcdc_crtc(c)); |
| } |
| |
| static void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc) |
| { |
| struct atmel_hlcdc_crtc_state *state; |
| |
| if (crtc->state) { |
| __drm_atomic_helper_crtc_destroy_state(crtc->state); |
| state = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state); |
| kfree(state); |
| crtc->state = NULL; |
| } |
| |
| state = kzalloc(sizeof(*state), GFP_KERNEL); |
| if (state) { |
| crtc->state = &state->base; |
| crtc->state->crtc = crtc; |
| } |
| } |
| |
| static struct drm_crtc_state * |
| atmel_hlcdc_crtc_duplicate_state(struct drm_crtc *crtc) |
| { |
| struct atmel_hlcdc_crtc_state *state, *cur; |
| |
| if (WARN_ON(!crtc->state)) |
| return NULL; |
| |
| state = kmalloc(sizeof(*state), GFP_KERNEL); |
| if (!state) |
| return NULL; |
| __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base); |
| |
| cur = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state); |
| state->output_mode = cur->output_mode; |
| |
| return &state->base; |
| } |
| |
| static void atmel_hlcdc_crtc_destroy_state(struct drm_crtc *crtc, |
| struct drm_crtc_state *s) |
| { |
| struct atmel_hlcdc_crtc_state *state; |
| |
| state = drm_crtc_state_to_atmel_hlcdc_crtc_state(s); |
| __drm_atomic_helper_crtc_destroy_state(s); |
| kfree(state); |
| } |
| |
| static int atmel_hlcdc_crtc_enable_vblank(struct drm_crtc *c) |
| { |
| struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c); |
| struct regmap *regmap = crtc->dc->hlcdc->regmap; |
| |
| /* Enable SOF (Start Of Frame) interrupt for vblank counting */ |
| regmap_write(regmap, ATMEL_HLCDC_IER, ATMEL_HLCDC_SOF); |
| |
| return 0; |
| } |
| |
| static void atmel_hlcdc_crtc_disable_vblank(struct drm_crtc *c) |
| { |
| struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c); |
| struct regmap *regmap = crtc->dc->hlcdc->regmap; |
| |
| regmap_write(regmap, ATMEL_HLCDC_IDR, ATMEL_HLCDC_SOF); |
| } |
| |
| static const struct drm_crtc_funcs atmel_hlcdc_crtc_funcs = { |
| .page_flip = drm_atomic_helper_page_flip, |
| .set_config = drm_atomic_helper_set_config, |
| .destroy = atmel_hlcdc_crtc_destroy, |
| .reset = atmel_hlcdc_crtc_reset, |
| .atomic_duplicate_state = atmel_hlcdc_crtc_duplicate_state, |
| .atomic_destroy_state = atmel_hlcdc_crtc_destroy_state, |
| .enable_vblank = atmel_hlcdc_crtc_enable_vblank, |
| .disable_vblank = atmel_hlcdc_crtc_disable_vblank, |
| }; |
| |
| int atmel_hlcdc_crtc_create(struct drm_device *dev) |
| { |
| struct atmel_hlcdc_plane *primary = NULL, *cursor = NULL; |
| struct atmel_hlcdc_dc *dc = dev->dev_private; |
| struct atmel_hlcdc_crtc *crtc; |
| int ret; |
| int i; |
| |
| crtc = kzalloc(sizeof(*crtc), GFP_KERNEL); |
| if (!crtc) |
| return -ENOMEM; |
| |
| crtc->dc = dc; |
| |
| for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) { |
| if (!dc->layers[i]) |
| continue; |
| |
| switch (dc->layers[i]->desc->type) { |
| case ATMEL_HLCDC_BASE_LAYER: |
| primary = atmel_hlcdc_layer_to_plane(dc->layers[i]); |
| break; |
| |
| case ATMEL_HLCDC_CURSOR_LAYER: |
| cursor = atmel_hlcdc_layer_to_plane(dc->layers[i]); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| ret = drm_crtc_init_with_planes(dev, &crtc->base, &primary->base, |
| &cursor->base, &atmel_hlcdc_crtc_funcs, |
| NULL); |
| if (ret < 0) |
| goto fail; |
| |
| crtc->id = drm_crtc_index(&crtc->base); |
| |
| for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) { |
| struct atmel_hlcdc_plane *overlay; |
| |
| if (dc->layers[i] && |
| dc->layers[i]->desc->type == ATMEL_HLCDC_OVERLAY_LAYER) { |
| overlay = atmel_hlcdc_layer_to_plane(dc->layers[i]); |
| overlay->base.possible_crtcs = 1 << crtc->id; |
| } |
| } |
| |
| drm_crtc_helper_add(&crtc->base, &lcdc_crtc_helper_funcs); |
| drm_crtc_vblank_reset(&crtc->base); |
| |
| dc->crtc = &crtc->base; |
| |
| return 0; |
| |
| fail: |
| atmel_hlcdc_crtc_destroy(&crtc->base); |
| return ret; |
| } |