blob: 0409b907de5d5cc771543d17cc50ed20bad3e3ba [file] [log] [blame]
/*
* 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 <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)
* @dpms: DPMS mode
*/
struct atmel_hlcdc_crtc {
struct drm_crtc base;
struct atmel_hlcdc_dc *dc;
struct drm_pending_vblank_event *event;
int id;
int dpms;
};
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_dpms(struct drm_crtc *c, int mode)
{
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 (mode != DRM_MODE_DPMS_ON)
mode = DRM_MODE_DPMS_OFF;
if (crtc->dpms == mode)
return;
pm_runtime_get_sync(dev->dev);
if (mode != DRM_MODE_DPMS_ON) {
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);
pm_runtime_allow(dev->dev);
} else {
pm_runtime_forbid(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);
crtc->dpms = mode;
}
static int atmel_hlcdc_crtc_mode_set(struct drm_crtc *c,
struct drm_display_mode *mode,
struct drm_display_mode *adj,
int x, int y,
struct drm_framebuffer *old_fb)
{
struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
struct regmap *regmap = crtc->dc->hlcdc->regmap;
struct drm_plane *plane = c->primary;
struct drm_framebuffer *fb;
unsigned long mode_rate;
struct videomode vm;
unsigned long prate;
unsigned int cfg;
int div;
if (atmel_hlcdc_dc_mode_valid(crtc->dc, adj) != MODE_OK)
return -EINVAL;
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 = ATMEL_HLCDC_CLKPOL;
prate = clk_get_rate(crtc->dc->hlcdc->sys_clk);
mode_rate = mode->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 (mode->flags & DRM_MODE_FLAG_NVSYNC)
cfg |= ATMEL_HLCDC_VSPOL;
if (mode->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);
fb = plane->fb;
plane->fb = old_fb;
return atmel_hlcdc_plane_update_with_mode(plane, c, fb, 0, 0,
adj->hdisplay, adj->vdisplay,
x << 16, y << 16,
adj->hdisplay << 16,
adj->vdisplay << 16,
adj);
}
int atmel_hlcdc_crtc_mode_set_base(struct drm_crtc *c, int x, int y,
struct drm_framebuffer *old_fb)
{
struct drm_plane *plane = c->primary;
struct drm_framebuffer *fb = plane->fb;
struct drm_display_mode *mode = &c->hwmode;
plane->fb = old_fb;
return plane->funcs->update_plane(plane, c, fb,
0, 0,
mode->hdisplay,
mode->vdisplay,
x << 16, y << 16,
mode->hdisplay << 16,
mode->vdisplay << 16);
}
static void atmel_hlcdc_crtc_prepare(struct drm_crtc *crtc)
{
atmel_hlcdc_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
}
static void atmel_hlcdc_crtc_commit(struct drm_crtc *crtc)
{
atmel_hlcdc_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
}
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 *crtc)
{
struct drm_plane *plane;
atmel_hlcdc_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
crtc->primary->funcs->disable_plane(crtc->primary);
drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) {
if (plane->crtc != crtc)
continue;
plane->funcs->disable_plane(crtc->primary);
plane->crtc = NULL;
}
}
static const struct drm_crtc_helper_funcs lcdc_crtc_helper_funcs = {
.mode_fixup = atmel_hlcdc_crtc_mode_fixup,
.dpms = atmel_hlcdc_crtc_dpms,
.mode_set = atmel_hlcdc_crtc_mode_set,
.mode_set_base = atmel_hlcdc_crtc_mode_set_base,
.prepare = atmel_hlcdc_crtc_prepare,
.commit = atmel_hlcdc_crtc_commit,
.disable = atmel_hlcdc_crtc_disable,
};
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 int atmel_hlcdc_crtc_page_flip(struct drm_crtc *c,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t page_flip_flags)
{
struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
struct atmel_hlcdc_plane_update_req req;
struct drm_plane *plane = c->primary;
struct drm_device *dev = c->dev;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&dev->event_lock, flags);
if (crtc->event)
ret = -EBUSY;
spin_unlock_irqrestore(&dev->event_lock, flags);
if (ret)
return ret;
memset(&req, 0, sizeof(req));
req.crtc_x = 0;
req.crtc_y = 0;
req.crtc_h = c->mode.crtc_vdisplay;
req.crtc_w = c->mode.crtc_hdisplay;
req.src_x = c->x << 16;
req.src_y = c->y << 16;
req.src_w = req.crtc_w << 16;
req.src_h = req.crtc_h << 16;
req.fb = fb;
ret = atmel_hlcdc_plane_prepare_update_req(plane, &req, &c->hwmode);
if (ret)
return ret;
if (event) {
drm_vblank_get(c->dev, crtc->id);
spin_lock_irqsave(&dev->event_lock, flags);
crtc->event = event;
spin_unlock_irqrestore(&dev->event_lock, flags);
}
ret = atmel_hlcdc_plane_apply_update_req(plane, &req);
if (ret)
crtc->event = NULL;
else
plane->fb = fb;
return ret;
}
static const struct drm_crtc_funcs atmel_hlcdc_crtc_funcs = {
.page_flip = atmel_hlcdc_crtc_page_flip,
.set_config = drm_crtc_helper_set_config,
.destroy = atmel_hlcdc_crtc_destroy,
};
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->dpms = DRM_MODE_DPMS_OFF;
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;
}