--- /dev/null
+/*
+ * 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 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)
+ * @enabled: CRTC state
+ */
+struct atmel_hlcdc_crtc {
+ struct drm_crtc base;
+ struct atmel_hlcdc_dc *dc;
+ struct drm_pending_vblank_event *event;
+ int id;
+ bool enabled;
+};
+
+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;
+ 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;
+
+ 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,
+ cfg);
+}
+
+static bool atmel_hlcdc_crtc_mode_fixup(struct drm_crtc *crtc,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ return true;
+}
+
+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;
+
+ if (!crtc->enabled)
+ return;
+
+ 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);
+
+ crtc->enabled = false;
+}
+
+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;
+
+ if (crtc->enabled)
+ return;
+
+ 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);
+
+ crtc->enabled = true;
+}
+
+void atmel_hlcdc_crtc_suspend(struct drm_crtc *c)
+{
+ struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+
+ if (crtc->enabled) {
+ atmel_hlcdc_crtc_disable(c);
+ /* save enable state for resume */
+ crtc->enabled = true;
+ }
+}
+
+void atmel_hlcdc_crtc_resume(struct drm_crtc *c)
+{
+ struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+
+ if (crtc->enabled) {
+ crtc->enabled = false;
+ atmel_hlcdc_crtc_enable(c);
+ }
+}
+
+static int atmel_hlcdc_crtc_atomic_check(struct drm_crtc *c,
+ struct drm_crtc_state *s)
+{
+ struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+
+ if (atmel_hlcdc_dc_mode_valid(crtc->dc, &s->adjusted_mode) != MODE_OK)
+ return -EINVAL;
+
+ return atmel_hlcdc_plane_prepare_disc_area(s);
+}
+
+static void atmel_hlcdc_crtc_atomic_begin(struct drm_crtc *c)
+{
+ 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)
+{
+ /* TODO: write common plane control register if available */
+}
+
+static const struct drm_crtc_helper_funcs lcdc_crtc_helper_funcs = {
+ .mode_fixup = atmel_hlcdc_crtc_mode_fixup,
+ .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);
+}
+
+void atmel_hlcdc_crtc_cancel_page_flip(struct drm_crtc *c,
+ struct drm_file *file)
+{
+ struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
+ struct drm_pending_vblank_event *event;
+ struct drm_device *dev = c->dev;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ event = crtc->event;
+ if (event && event->base.file_priv == file) {
+ event->base.destroy(&event->base);
+ drm_vblank_put(dev, crtc->id);
+ crtc->event = NULL;
+ }
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
+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_send_vblank_event(dev, crtc->id, crtc->event);
+ drm_vblank_put(dev, crtc->id);
+ crtc->event = NULL;
+ }
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
+void atmel_hlcdc_crtc_irq(struct drm_crtc *c)
+{
+ drm_handle_vblank(c->dev, 0);
+ atmel_hlcdc_crtc_finish_page_flip(drm_crtc_to_atmel_hlcdc_crtc(c));
+}
+
+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 = drm_atomic_helper_crtc_reset,
+ .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+};
+
+int atmel_hlcdc_crtc_create(struct drm_device *dev)
+{
+ struct atmel_hlcdc_dc *dc = dev->dev_private;
+ struct atmel_hlcdc_planes *planes = dc->planes;
+ struct atmel_hlcdc_crtc *crtc;
+ int ret;
+ int i;
+
+ crtc = kzalloc(sizeof(*crtc), GFP_KERNEL);
+ if (!crtc)
+ return -ENOMEM;
+
+ crtc->dc = dc;
+
+ ret = drm_crtc_init_with_planes(dev, &crtc->base,
+ &planes->primary->base,
+ planes->cursor ? &planes->cursor->base : NULL,
+ &atmel_hlcdc_crtc_funcs);
+ if (ret < 0)
+ goto fail;
+
+ crtc->id = drm_crtc_index(&crtc->base);
+
+ if (planes->cursor)
+ planes->cursor->base.possible_crtcs = 1 << crtc->id;
+
+ for (i = 0; i < planes->noverlays; i++)
+ planes->overlays[i]->base.possible_crtcs = 1 << crtc->id;
+
+ drm_crtc_helper_add(&crtc->base, &lcdc_crtc_helper_funcs);
+
+ dc->crtc = &crtc->base;
+
+ return 0;
+
+fail:
+ atmel_hlcdc_crtc_destroy(&crtc->base);
+ return ret;
+}
+
Code Review / kvmfornfv.git / blobdiff