mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Sean Paul](/assets/img/avatar_default.png)
A couple more return value fixes which Philippe brought up during our previous review. Suggested-by: Philippe CORNU <philippe.cornu@st.com> Reviewed-by: Philippe Cornu <philippe.cornu@st.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20180117213751.54668-1-seanpaul@chromium.org
328 lines
7.8 KiB
C
328 lines
7.8 KiB
C
/*
|
|
* Copyright (C) 2015 Red Hat
|
|
* Copyright (C) 2015 Sony Mobile Communications Inc.
|
|
* Author: Werner Johansson <werner.johansson@sonymobile.com>
|
|
*
|
|
* Based on AUO panel driver by Rob Clark <robdclark@gmail.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/backlight.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_crtc.h>
|
|
#include <drm/drm_mipi_dsi.h>
|
|
#include <drm/drm_panel.h>
|
|
|
|
#include <video/mipi_display.h>
|
|
|
|
/*
|
|
* When power is turned off to this panel a minimum off time of 500ms has to be
|
|
* observed before powering back on as there's no external reset pin. Keep
|
|
* track of earliest wakeup time and delay subsequent prepare call accordingly
|
|
*/
|
|
#define MIN_POFF_MS (500)
|
|
|
|
struct wuxga_nt_panel {
|
|
struct drm_panel base;
|
|
struct mipi_dsi_device *dsi;
|
|
|
|
struct backlight_device *backlight;
|
|
struct regulator *supply;
|
|
|
|
bool prepared;
|
|
bool enabled;
|
|
|
|
ktime_t earliest_wake;
|
|
|
|
const struct drm_display_mode *mode;
|
|
};
|
|
|
|
static inline struct wuxga_nt_panel *to_wuxga_nt_panel(struct drm_panel *panel)
|
|
{
|
|
return container_of(panel, struct wuxga_nt_panel, base);
|
|
}
|
|
|
|
static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt)
|
|
{
|
|
return mipi_dsi_turn_on_peripheral(wuxga_nt->dsi);
|
|
}
|
|
|
|
static int wuxga_nt_panel_disable(struct drm_panel *panel)
|
|
{
|
|
struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
|
|
int mipi_ret, bl_ret = 0;
|
|
|
|
if (!wuxga_nt->enabled)
|
|
return 0;
|
|
|
|
mipi_ret = mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
|
|
|
|
if (wuxga_nt->backlight) {
|
|
wuxga_nt->backlight->props.power = FB_BLANK_POWERDOWN;
|
|
wuxga_nt->backlight->props.state |= BL_CORE_FBBLANK;
|
|
bl_ret = backlight_update_status(wuxga_nt->backlight);
|
|
}
|
|
|
|
wuxga_nt->enabled = false;
|
|
|
|
return mipi_ret ? mipi_ret : bl_ret;
|
|
}
|
|
|
|
static int wuxga_nt_panel_unprepare(struct drm_panel *panel)
|
|
{
|
|
struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
|
|
|
|
if (!wuxga_nt->prepared)
|
|
return 0;
|
|
|
|
regulator_disable(wuxga_nt->supply);
|
|
wuxga_nt->earliest_wake = ktime_add_ms(ktime_get_real(), MIN_POFF_MS);
|
|
wuxga_nt->prepared = false;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wuxga_nt_panel_prepare(struct drm_panel *panel)
|
|
{
|
|
struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
|
|
int ret;
|
|
s64 enablewait;
|
|
|
|
if (wuxga_nt->prepared)
|
|
return 0;
|
|
|
|
/*
|
|
* If the user re-enabled the panel before the required off-time then
|
|
* we need to wait the remaining period before re-enabling regulator
|
|
*/
|
|
enablewait = ktime_ms_delta(wuxga_nt->earliest_wake, ktime_get_real());
|
|
|
|
/* Sanity check, this should never happen */
|
|
if (enablewait > MIN_POFF_MS)
|
|
enablewait = MIN_POFF_MS;
|
|
|
|
if (enablewait > 0)
|
|
msleep(enablewait);
|
|
|
|
ret = regulator_enable(wuxga_nt->supply);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* A minimum delay of 250ms is required after power-up until commands
|
|
* can be sent
|
|
*/
|
|
msleep(250);
|
|
|
|
ret = wuxga_nt_panel_on(wuxga_nt);
|
|
if (ret < 0) {
|
|
dev_err(panel->dev, "failed to set panel on: %d\n", ret);
|
|
goto poweroff;
|
|
}
|
|
|
|
wuxga_nt->prepared = true;
|
|
|
|
return 0;
|
|
|
|
poweroff:
|
|
regulator_disable(wuxga_nt->supply);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int wuxga_nt_panel_enable(struct drm_panel *panel)
|
|
{
|
|
struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
|
|
|
|
if (wuxga_nt->enabled)
|
|
return 0;
|
|
|
|
if (wuxga_nt->backlight) {
|
|
wuxga_nt->backlight->props.power = FB_BLANK_UNBLANK;
|
|
wuxga_nt->backlight->props.state &= ~BL_CORE_FBBLANK;
|
|
backlight_update_status(wuxga_nt->backlight);
|
|
}
|
|
|
|
wuxga_nt->enabled = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct drm_display_mode default_mode = {
|
|
.clock = 164402,
|
|
.hdisplay = 1920,
|
|
.hsync_start = 1920 + 152,
|
|
.hsync_end = 1920 + 152 + 52,
|
|
.htotal = 1920 + 152 + 52 + 20,
|
|
.vdisplay = 1200,
|
|
.vsync_start = 1200 + 24,
|
|
.vsync_end = 1200 + 24 + 6,
|
|
.vtotal = 1200 + 24 + 6 + 48,
|
|
.vrefresh = 60,
|
|
};
|
|
|
|
static int wuxga_nt_panel_get_modes(struct drm_panel *panel)
|
|
{
|
|
struct drm_display_mode *mode;
|
|
|
|
mode = drm_mode_duplicate(panel->drm, &default_mode);
|
|
if (!mode) {
|
|
dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
|
|
default_mode.hdisplay, default_mode.vdisplay,
|
|
default_mode.vrefresh);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
drm_mode_set_name(mode);
|
|
|
|
drm_mode_probed_add(panel->connector, mode);
|
|
|
|
panel->connector->display_info.width_mm = 217;
|
|
panel->connector->display_info.height_mm = 136;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static const struct drm_panel_funcs wuxga_nt_panel_funcs = {
|
|
.disable = wuxga_nt_panel_disable,
|
|
.unprepare = wuxga_nt_panel_unprepare,
|
|
.prepare = wuxga_nt_panel_prepare,
|
|
.enable = wuxga_nt_panel_enable,
|
|
.get_modes = wuxga_nt_panel_get_modes,
|
|
};
|
|
|
|
static const struct of_device_id wuxga_nt_of_match[] = {
|
|
{ .compatible = "panasonic,vvx10f034n00", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, wuxga_nt_of_match);
|
|
|
|
static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt)
|
|
{
|
|
struct device *dev = &wuxga_nt->dsi->dev;
|
|
struct device_node *np;
|
|
int ret;
|
|
|
|
wuxga_nt->mode = &default_mode;
|
|
|
|
wuxga_nt->supply = devm_regulator_get(dev, "power");
|
|
if (IS_ERR(wuxga_nt->supply))
|
|
return PTR_ERR(wuxga_nt->supply);
|
|
|
|
np = of_parse_phandle(dev->of_node, "backlight", 0);
|
|
if (np) {
|
|
wuxga_nt->backlight = of_find_backlight_by_node(np);
|
|
of_node_put(np);
|
|
|
|
if (!wuxga_nt->backlight)
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
drm_panel_init(&wuxga_nt->base);
|
|
wuxga_nt->base.funcs = &wuxga_nt_panel_funcs;
|
|
wuxga_nt->base.dev = &wuxga_nt->dsi->dev;
|
|
|
|
ret = drm_panel_add(&wuxga_nt->base);
|
|
if (ret < 0)
|
|
goto put_backlight;
|
|
|
|
return 0;
|
|
|
|
put_backlight:
|
|
if (wuxga_nt->backlight)
|
|
put_device(&wuxga_nt->backlight->dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt)
|
|
{
|
|
if (wuxga_nt->base.dev)
|
|
drm_panel_remove(&wuxga_nt->base);
|
|
|
|
if (wuxga_nt->backlight)
|
|
put_device(&wuxga_nt->backlight->dev);
|
|
}
|
|
|
|
static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)
|
|
{
|
|
struct wuxga_nt_panel *wuxga_nt;
|
|
int ret;
|
|
|
|
dsi->lanes = 4;
|
|
dsi->format = MIPI_DSI_FMT_RGB888;
|
|
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
|
|
MIPI_DSI_MODE_VIDEO_HSE |
|
|
MIPI_DSI_CLOCK_NON_CONTINUOUS |
|
|
MIPI_DSI_MODE_LPM;
|
|
|
|
wuxga_nt = devm_kzalloc(&dsi->dev, sizeof(*wuxga_nt), GFP_KERNEL);
|
|
if (!wuxga_nt)
|
|
return -ENOMEM;
|
|
|
|
mipi_dsi_set_drvdata(dsi, wuxga_nt);
|
|
|
|
wuxga_nt->dsi = dsi;
|
|
|
|
ret = wuxga_nt_panel_add(wuxga_nt);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return mipi_dsi_attach(dsi);
|
|
}
|
|
|
|
static int wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)
|
|
{
|
|
struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
|
|
int ret;
|
|
|
|
ret = wuxga_nt_panel_disable(&wuxga_nt->base);
|
|
if (ret < 0)
|
|
dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
|
|
|
|
ret = mipi_dsi_detach(dsi);
|
|
if (ret < 0)
|
|
dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
|
|
|
|
drm_panel_detach(&wuxga_nt->base);
|
|
wuxga_nt_panel_del(wuxga_nt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void wuxga_nt_panel_shutdown(struct mipi_dsi_device *dsi)
|
|
{
|
|
struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
|
|
|
|
wuxga_nt_panel_disable(&wuxga_nt->base);
|
|
}
|
|
|
|
static struct mipi_dsi_driver wuxga_nt_panel_driver = {
|
|
.driver = {
|
|
.name = "panel-panasonic-vvx10f034n00",
|
|
.of_match_table = wuxga_nt_of_match,
|
|
},
|
|
.probe = wuxga_nt_panel_probe,
|
|
.remove = wuxga_nt_panel_remove,
|
|
.shutdown = wuxga_nt_panel_shutdown,
|
|
};
|
|
module_mipi_dsi_driver(wuxga_nt_panel_driver);
|
|
|
|
MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
|
|
MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver");
|
|
MODULE_LICENSE("GPL v2");
|