2015-01-06 03:13:28 -07:00
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/*
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* Copyright (C) 2014 Traphandler
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* Copyright (C) 2014 Free Electrons
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*
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* Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
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* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/clk.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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2015-02-22 10:51:04 -07:00
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#include <linux/pinctrl/consumer.h>
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2015-01-06 03:13:28 -07:00
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drmP.h>
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#include <video/videomode.h>
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#include "atmel_hlcdc_dc.h"
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/**
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* Atmel HLCDC CRTC structure
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*
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* @base: base DRM CRTC structure
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* @hlcdc: pointer to the atmel_hlcdc structure provided by the MFD device
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* @event: pointer to the current page flip event
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* @id: CRTC id (returned by drm_crtc_index)
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2015-02-05 08:32:33 -07:00
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* @enabled: CRTC state
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2015-01-06 03:13:28 -07:00
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*/
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struct atmel_hlcdc_crtc {
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struct drm_crtc base;
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struct atmel_hlcdc_dc *dc;
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struct drm_pending_vblank_event *event;
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int id;
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2015-02-05 08:32:33 -07:00
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bool enabled;
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2015-01-06 03:13:28 -07:00
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};
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static inline struct atmel_hlcdc_crtc *
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drm_crtc_to_atmel_hlcdc_crtc(struct drm_crtc *crtc)
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{
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return container_of(crtc, struct atmel_hlcdc_crtc, base);
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}
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2015-02-05 08:32:33 -07:00
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static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
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2015-01-06 03:13:28 -07:00
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{
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struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
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struct regmap *regmap = crtc->dc->hlcdc->regmap;
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2015-02-05 08:32:33 -07:00
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struct drm_display_mode *adj = &c->state->adjusted_mode;
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2015-01-06 03:13:28 -07:00
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unsigned long mode_rate;
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struct videomode vm;
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unsigned long prate;
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unsigned int cfg;
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int div;
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vm.vfront_porch = adj->crtc_vsync_start - adj->crtc_vdisplay;
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vm.vback_porch = adj->crtc_vtotal - adj->crtc_vsync_end;
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vm.vsync_len = adj->crtc_vsync_end - adj->crtc_vsync_start;
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vm.hfront_porch = adj->crtc_hsync_start - adj->crtc_hdisplay;
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vm.hback_porch = adj->crtc_htotal - adj->crtc_hsync_end;
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vm.hsync_len = adj->crtc_hsync_end - adj->crtc_hsync_start;
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regmap_write(regmap, ATMEL_HLCDC_CFG(1),
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(vm.hsync_len - 1) | ((vm.vsync_len - 1) << 16));
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regmap_write(regmap, ATMEL_HLCDC_CFG(2),
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(vm.vfront_porch - 1) | (vm.vback_porch << 16));
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regmap_write(regmap, ATMEL_HLCDC_CFG(3),
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(vm.hfront_porch - 1) | ((vm.hback_porch - 1) << 16));
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regmap_write(regmap, ATMEL_HLCDC_CFG(4),
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(adj->crtc_hdisplay - 1) |
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((adj->crtc_vdisplay - 1) << 16));
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2015-02-25 10:44:51 -07:00
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cfg = 0;
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2015-01-06 03:13:28 -07:00
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prate = clk_get_rate(crtc->dc->hlcdc->sys_clk);
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2015-02-05 08:32:33 -07:00
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mode_rate = adj->crtc_clock * 1000;
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2015-01-06 03:13:28 -07:00
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if ((prate / 2) < mode_rate) {
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prate *= 2;
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cfg |= ATMEL_HLCDC_CLKSEL;
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}
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div = DIV_ROUND_UP(prate, mode_rate);
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if (div < 2)
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div = 2;
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cfg |= ATMEL_HLCDC_CLKDIV(div);
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regmap_update_bits(regmap, ATMEL_HLCDC_CFG(0),
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ATMEL_HLCDC_CLKSEL | ATMEL_HLCDC_CLKDIV_MASK |
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ATMEL_HLCDC_CLKPOL, cfg);
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cfg = 0;
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2015-02-05 08:32:33 -07:00
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if (adj->flags & DRM_MODE_FLAG_NVSYNC)
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2015-01-06 03:13:28 -07:00
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cfg |= ATMEL_HLCDC_VSPOL;
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2015-02-05 08:32:33 -07:00
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if (adj->flags & DRM_MODE_FLAG_NHSYNC)
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2015-01-06 03:13:28 -07:00
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cfg |= ATMEL_HLCDC_HSPOL;
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regmap_update_bits(regmap, ATMEL_HLCDC_CFG(5),
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ATMEL_HLCDC_HSPOL | ATMEL_HLCDC_VSPOL |
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ATMEL_HLCDC_VSPDLYS | ATMEL_HLCDC_VSPDLYE |
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ATMEL_HLCDC_DISPPOL | ATMEL_HLCDC_DISPDLY |
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ATMEL_HLCDC_VSPSU | ATMEL_HLCDC_VSPHO |
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ATMEL_HLCDC_GUARDTIME_MASK,
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cfg);
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}
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2015-02-05 08:32:33 -07:00
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static void atmel_hlcdc_crtc_disable(struct drm_crtc *c)
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2015-01-06 03:13:28 -07:00
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{
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2015-02-05 08:32:33 -07:00
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struct drm_device *dev = c->dev;
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struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
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struct regmap *regmap = crtc->dc->hlcdc->regmap;
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unsigned int status;
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if (!crtc->enabled)
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return;
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drm_crtc_vblank_off(c);
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pm_runtime_get_sync(dev->dev);
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regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_DISP);
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while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
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(status & ATMEL_HLCDC_DISP))
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cpu_relax();
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regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_SYNC);
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while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
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(status & ATMEL_HLCDC_SYNC))
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cpu_relax();
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regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_PIXEL_CLK);
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while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
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(status & ATMEL_HLCDC_PIXEL_CLK))
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cpu_relax();
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clk_disable_unprepare(crtc->dc->hlcdc->sys_clk);
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2015-02-22 10:51:04 -07:00
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pinctrl_pm_select_sleep_state(dev->dev);
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2015-02-05 08:32:33 -07:00
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pm_runtime_allow(dev->dev);
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pm_runtime_put_sync(dev->dev);
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crtc->enabled = false;
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2015-01-06 03:13:28 -07:00
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}
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2015-02-05 08:32:33 -07:00
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static void atmel_hlcdc_crtc_enable(struct drm_crtc *c)
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2015-01-06 03:13:28 -07:00
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{
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2015-02-05 08:32:33 -07:00
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struct drm_device *dev = c->dev;
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struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
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struct regmap *regmap = crtc->dc->hlcdc->regmap;
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unsigned int status;
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if (crtc->enabled)
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return;
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pm_runtime_get_sync(dev->dev);
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pm_runtime_forbid(dev->dev);
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2015-02-22 10:51:04 -07:00
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pinctrl_pm_select_default_state(dev->dev);
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2015-02-05 08:32:33 -07:00
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clk_prepare_enable(crtc->dc->hlcdc->sys_clk);
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regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_PIXEL_CLK);
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while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
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!(status & ATMEL_HLCDC_PIXEL_CLK))
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cpu_relax();
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regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_SYNC);
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while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
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!(status & ATMEL_HLCDC_SYNC))
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cpu_relax();
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regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_DISP);
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while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
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!(status & ATMEL_HLCDC_DISP))
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cpu_relax();
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pm_runtime_put_sync(dev->dev);
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drm_crtc_vblank_on(c);
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crtc->enabled = true;
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2015-01-06 03:13:28 -07:00
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}
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2015-03-12 12:47:19 -06:00
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void atmel_hlcdc_crtc_suspend(struct drm_crtc *c)
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{
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struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
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if (crtc->enabled) {
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atmel_hlcdc_crtc_disable(c);
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/* save enable state for resume */
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crtc->enabled = true;
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}
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}
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void atmel_hlcdc_crtc_resume(struct drm_crtc *c)
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{
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struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
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if (crtc->enabled) {
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crtc->enabled = false;
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atmel_hlcdc_crtc_enable(c);
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}
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}
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2015-02-05 08:32:33 -07:00
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static int atmel_hlcdc_crtc_atomic_check(struct drm_crtc *c,
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struct drm_crtc_state *s)
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2015-01-06 03:13:28 -07:00
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{
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2015-02-05 08:32:33 -07:00
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struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
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if (atmel_hlcdc_dc_mode_valid(crtc->dc, &s->adjusted_mode) != MODE_OK)
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return -EINVAL;
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2015-02-06 08:25:06 -07:00
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return atmel_hlcdc_plane_prepare_disc_area(s);
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2015-01-06 03:13:28 -07:00
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}
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2015-07-21 05:28:58 -06:00
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static void atmel_hlcdc_crtc_atomic_begin(struct drm_crtc *c,
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struct drm_crtc_state *old_s)
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2015-01-06 03:13:28 -07:00
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{
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2015-02-05 08:32:33 -07:00
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struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
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2015-01-06 03:13:28 -07:00
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2015-02-05 08:32:33 -07:00
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if (c->state->event) {
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c->state->event->pipe = drm_crtc_index(c);
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2015-01-06 03:13:28 -07:00
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2015-02-05 08:32:33 -07:00
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WARN_ON(drm_crtc_vblank_get(c) != 0);
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2015-01-06 03:13:28 -07:00
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2015-02-05 08:32:33 -07:00
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crtc->event = c->state->event;
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c->state->event = NULL;
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2015-01-06 03:13:28 -07:00
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}
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}
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2015-07-21 05:28:58 -06:00
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static void atmel_hlcdc_crtc_atomic_flush(struct drm_crtc *crtc,
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struct drm_crtc_state *old_s)
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2015-02-05 08:32:33 -07:00
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{
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/* TODO: write common plane control register if available */
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}
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2015-01-06 03:13:28 -07:00
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static const struct drm_crtc_helper_funcs lcdc_crtc_helper_funcs = {
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2015-02-05 08:32:33 -07:00
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.mode_set = drm_helper_crtc_mode_set,
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.mode_set_nofb = atmel_hlcdc_crtc_mode_set_nofb,
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.mode_set_base = drm_helper_crtc_mode_set_base,
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2015-01-06 03:13:28 -07:00
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.disable = atmel_hlcdc_crtc_disable,
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2015-02-05 08:32:33 -07:00
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.enable = atmel_hlcdc_crtc_enable,
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.atomic_check = atmel_hlcdc_crtc_atomic_check,
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.atomic_begin = atmel_hlcdc_crtc_atomic_begin,
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.atomic_flush = atmel_hlcdc_crtc_atomic_flush,
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2015-01-06 03:13:28 -07:00
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};
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static void atmel_hlcdc_crtc_destroy(struct drm_crtc *c)
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{
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struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
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drm_crtc_cleanup(c);
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kfree(crtc);
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}
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static void atmel_hlcdc_crtc_finish_page_flip(struct atmel_hlcdc_crtc *crtc)
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{
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struct drm_device *dev = crtc->base.dev;
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unsigned long flags;
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spin_lock_irqsave(&dev->event_lock, flags);
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if (crtc->event) {
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drm_send_vblank_event(dev, crtc->id, crtc->event);
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drm_vblank_put(dev, crtc->id);
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crtc->event = NULL;
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}
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spin_unlock_irqrestore(&dev->event_lock, flags);
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}
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void atmel_hlcdc_crtc_irq(struct drm_crtc *c)
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{
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drm_handle_vblank(c->dev, 0);
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atmel_hlcdc_crtc_finish_page_flip(drm_crtc_to_atmel_hlcdc_crtc(c));
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}
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static const struct drm_crtc_funcs atmel_hlcdc_crtc_funcs = {
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2015-02-05 08:32:33 -07:00
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.page_flip = drm_atomic_helper_page_flip,
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.set_config = drm_atomic_helper_set_config,
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2015-01-06 03:13:28 -07:00
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.destroy = atmel_hlcdc_crtc_destroy,
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2015-02-05 08:32:33 -07:00
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.reset = drm_atomic_helper_crtc_reset,
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.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
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2015-01-06 03:13:28 -07:00
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};
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int atmel_hlcdc_crtc_create(struct drm_device *dev)
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{
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struct atmel_hlcdc_dc *dc = dev->dev_private;
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struct atmel_hlcdc_planes *planes = dc->planes;
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struct atmel_hlcdc_crtc *crtc;
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int ret;
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int i;
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crtc = kzalloc(sizeof(*crtc), GFP_KERNEL);
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if (!crtc)
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return -ENOMEM;
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crtc->dc = dc;
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ret = drm_crtc_init_with_planes(dev, &crtc->base,
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&planes->primary->base,
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planes->cursor ? &planes->cursor->base : NULL,
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drm: Pass 'name' to drm_crtc_init_with_planes()
Done with coccinelle for the most part. However, it thinks '...' is
part of the semantic patch, so I put an 'int DOTDOTDOT' placeholder
in its place and got rid of it with sed afterwards.
I didn't convert drm_crtc_init() since passing the varargs through
would mean either cpp macros or va_list, and I figured we don't
care about these legacy functions enough to warrant the extra pain.
@@
identifier dev, crtc, primary, cursor, funcs;
@@
int drm_crtc_init_with_planes(struct drm_device *dev,
struct drm_crtc *crtc,
struct drm_plane *primary, struct drm_plane *cursor,
const struct drm_crtc_funcs *funcs
+ ,const char *name, int DOTDOTDOT
)
{ ... }
@@
identifier dev, crtc, primary, cursor, funcs;
@@
int drm_crtc_init_with_planes(struct drm_device *dev,
struct drm_crtc *crtc,
struct drm_plane *primary, struct drm_plane *cursor,
const struct drm_crtc_funcs *funcs
+ ,const char *name, int DOTDOTDOT
);
@@
expression E1, E2, E3, E4, E5;
@@
drm_crtc_init_with_planes(E1, E2, E3, E4, E5
+ ,NULL
)
v2: Split crtc and plane changes apart
Pass NULL for no-name instead of ""
Leave drm_crtc_init() alone
v3: Add ', or NULL...' to @name kernel doc (Jani)
Annotate the function with __printf() attribute (Jani)
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1449670771-2751-1-git-send-email-ville.syrjala@linux.intel.com
2015-12-09 07:19:31 -07:00
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&atmel_hlcdc_crtc_funcs, NULL);
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2015-01-06 03:13:28 -07:00
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if (ret < 0)
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goto fail;
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crtc->id = drm_crtc_index(&crtc->base);
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if (planes->cursor)
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planes->cursor->base.possible_crtcs = 1 << crtc->id;
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for (i = 0; i < planes->noverlays; i++)
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planes->overlays[i]->base.possible_crtcs = 1 << crtc->id;
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drm_crtc_helper_add(&crtc->base, &lcdc_crtc_helper_funcs);
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2015-07-16 12:55:34 -06:00
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drm_crtc_vblank_reset(&crtc->base);
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2015-01-06 03:13:28 -07:00
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dc->crtc = &crtc->base;
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return 0;
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fail:
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atmel_hlcdc_crtc_destroy(&crtc->base);
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return ret;
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}
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