2012-12-18 16:34:16 -07:00
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/*
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* Copyright (C) 2012 Texas Instruments
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* Author: Rob Clark <robdclark@gmail.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/pinctrl/pinmux.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/backlight.h>
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2014-09-02 06:51:22 -06:00
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#include <linux/gpio/consumer.h>
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2012-12-18 16:34:16 -07:00
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#include <video/display_timing.h>
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#include <video/of_display_timing.h>
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#include <video/videomode.h>
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#include "tilcdc_drv.h"
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struct panel_module {
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struct tilcdc_module base;
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struct tilcdc_panel_info *info;
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struct display_timings *timings;
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struct backlight_device *backlight;
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2014-09-02 06:51:22 -06:00
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struct gpio_desc *enable_gpio;
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2012-12-18 16:34:16 -07:00
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};
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#define to_panel_module(x) container_of(x, struct panel_module, base)
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/*
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* Encoder:
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*/
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struct panel_encoder {
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struct drm_encoder base;
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struct panel_module *mod;
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};
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#define to_panel_encoder(x) container_of(x, struct panel_encoder, base)
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static void panel_encoder_dpms(struct drm_encoder *encoder, int mode)
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{
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struct panel_encoder *panel_encoder = to_panel_encoder(encoder);
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struct backlight_device *backlight = panel_encoder->mod->backlight;
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2014-09-02 06:51:22 -06:00
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struct gpio_desc *gpio = panel_encoder->mod->enable_gpio;
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2012-12-18 16:34:16 -07:00
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2014-09-02 06:51:22 -06:00
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if (backlight) {
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backlight->props.power = mode == DRM_MODE_DPMS_ON ?
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FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
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backlight_update_status(backlight);
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}
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2012-12-18 16:34:16 -07:00
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2014-09-02 06:51:22 -06:00
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if (gpio)
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gpiod_set_value_cansleep(gpio,
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mode == DRM_MODE_DPMS_ON ? 1 : 0);
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2012-12-18 16:34:16 -07:00
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}
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static void panel_encoder_prepare(struct drm_encoder *encoder)
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{
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struct panel_encoder *panel_encoder = to_panel_encoder(encoder);
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panel_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
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tilcdc_crtc_set_panel_info(encoder->crtc, panel_encoder->mod->info);
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}
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static void panel_encoder_commit(struct drm_encoder *encoder)
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{
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panel_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
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}
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static void panel_encoder_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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/* nothing needed */
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}
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static const struct drm_encoder_funcs panel_encoder_funcs = {
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2016-02-23 03:44:27 -07:00
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.destroy = drm_encoder_cleanup,
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2012-12-18 16:34:16 -07:00
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};
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static const struct drm_encoder_helper_funcs panel_encoder_helper_funcs = {
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.dpms = panel_encoder_dpms,
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.prepare = panel_encoder_prepare,
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.commit = panel_encoder_commit,
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.mode_set = panel_encoder_mode_set,
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};
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static struct drm_encoder *panel_encoder_create(struct drm_device *dev,
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struct panel_module *mod)
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{
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struct panel_encoder *panel_encoder;
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struct drm_encoder *encoder;
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int ret;
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2016-02-23 03:44:27 -07:00
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panel_encoder = devm_kzalloc(dev->dev, sizeof(*panel_encoder),
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GFP_KERNEL);
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2012-12-18 16:34:16 -07:00
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if (!panel_encoder) {
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dev_err(dev->dev, "allocation failed\n");
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return NULL;
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}
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panel_encoder->mod = mod;
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encoder = &panel_encoder->base;
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encoder->possible_crtcs = 1;
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ret = drm_encoder_init(dev, encoder, &panel_encoder_funcs,
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drm: Pass 'name' to drm_encoder_init()
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.
@@
identifier dev, encoder, funcs;
@@
int drm_encoder_init(struct drm_device *dev,
struct drm_encoder *encoder,
const struct drm_encoder_funcs *funcs,
int encoder_type
+ ,const char *name, int DOTDOTDOT
)
{ ... }
@@
identifier dev, encoder, funcs;
@@
int drm_encoder_init(struct drm_device *dev,
struct drm_encoder *encoder,
const struct drm_encoder_funcs *funcs,
int encoder_type
+ ,const char *name, int DOTDOTDOT
);
@@
expression E1, E2, E3, E4;
@@
drm_encoder_init(E1, E2, E3, E4
+ ,NULL
)
v2: 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/1449670818-2966-1-git-send-email-ville.syrjala@linux.intel.com
2015-12-09 07:20:18 -07:00
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DRM_MODE_ENCODER_LVDS, NULL);
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2012-12-18 16:34:16 -07:00
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if (ret < 0)
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goto fail;
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drm_encoder_helper_add(encoder, &panel_encoder_helper_funcs);
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return encoder;
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fail:
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2016-02-23 03:44:27 -07:00
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drm_encoder_cleanup(encoder);
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2012-12-18 16:34:16 -07:00
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return NULL;
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}
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/*
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* Connector:
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*/
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struct panel_connector {
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struct drm_connector base;
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struct drm_encoder *encoder; /* our connected encoder */
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struct panel_module *mod;
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};
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#define to_panel_connector(x) container_of(x, struct panel_connector, base)
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static void panel_connector_destroy(struct drm_connector *connector)
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{
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2014-07-09 05:42:57 -06:00
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drm_connector_unregister(connector);
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2012-12-18 16:34:16 -07:00
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drm_connector_cleanup(connector);
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}
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static enum drm_connector_status panel_connector_detect(
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struct drm_connector *connector,
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bool force)
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{
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return connector_status_connected;
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}
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static int panel_connector_get_modes(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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struct panel_connector *panel_connector = to_panel_connector(connector);
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struct display_timings *timings = panel_connector->mod->timings;
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int i;
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for (i = 0; i < timings->num_timings; i++) {
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struct drm_display_mode *mode = drm_mode_create(dev);
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struct videomode vm;
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2013-03-21 06:20:12 -06:00
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if (videomode_from_timings(timings, &vm, i))
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2012-12-18 16:34:16 -07:00
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break;
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drm_display_mode_from_videomode(&vm, mode);
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mode->type = DRM_MODE_TYPE_DRIVER;
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if (timings->native_mode == i)
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mode->type |= DRM_MODE_TYPE_PREFERRED;
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drm_mode_set_name(mode);
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drm_mode_probed_add(connector, mode);
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}
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return i;
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}
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static int panel_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct tilcdc_drm_private *priv = connector->dev->dev_private;
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/* our only constraints are what the crtc can generate: */
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return tilcdc_crtc_mode_valid(priv->crtc, mode);
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}
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static struct drm_encoder *panel_connector_best_encoder(
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struct drm_connector *connector)
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{
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struct panel_connector *panel_connector = to_panel_connector(connector);
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return panel_connector->encoder;
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}
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static const struct drm_connector_funcs panel_connector_funcs = {
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.destroy = panel_connector_destroy,
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.dpms = drm_helper_connector_dpms,
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.detect = panel_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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};
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static const struct drm_connector_helper_funcs panel_connector_helper_funcs = {
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.get_modes = panel_connector_get_modes,
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.mode_valid = panel_connector_mode_valid,
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.best_encoder = panel_connector_best_encoder,
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};
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static struct drm_connector *panel_connector_create(struct drm_device *dev,
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struct panel_module *mod, struct drm_encoder *encoder)
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{
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struct panel_connector *panel_connector;
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struct drm_connector *connector;
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int ret;
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2016-02-23 03:44:27 -07:00
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panel_connector = devm_kzalloc(dev->dev, sizeof(*panel_connector),
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GFP_KERNEL);
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2012-12-18 16:34:16 -07:00
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if (!panel_connector) {
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dev_err(dev->dev, "allocation failed\n");
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return NULL;
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}
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panel_connector->encoder = encoder;
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panel_connector->mod = mod;
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connector = &panel_connector->base;
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drm_connector_init(dev, connector, &panel_connector_funcs,
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DRM_MODE_CONNECTOR_LVDS);
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drm_connector_helper_add(connector, &panel_connector_helper_funcs);
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connector->interlace_allowed = 0;
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connector->doublescan_allowed = 0;
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ret = drm_mode_connector_attach_encoder(connector, encoder);
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if (ret)
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goto fail;
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2014-05-29 09:57:41 -06:00
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drm_connector_register(connector);
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2012-12-18 16:34:16 -07:00
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return connector;
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fail:
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panel_connector_destroy(connector);
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return NULL;
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}
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/*
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* Module:
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*/
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static int panel_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
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{
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struct panel_module *panel_mod = to_panel_module(mod);
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struct tilcdc_drm_private *priv = dev->dev_private;
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struct drm_encoder *encoder;
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struct drm_connector *connector;
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encoder = panel_encoder_create(dev, panel_mod);
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if (!encoder)
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return -ENOMEM;
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connector = panel_connector_create(dev, panel_mod, encoder);
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if (!connector)
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return -ENOMEM;
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priv->encoders[priv->num_encoders++] = encoder;
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priv->connectors[priv->num_connectors++] = connector;
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return 0;
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}
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static const struct tilcdc_module_ops panel_module_ops = {
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.modeset_init = panel_modeset_init,
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};
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/*
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* Device:
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*/
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/* maybe move this somewhere common if it is needed by other outputs? */
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2013-03-02 03:23:09 -07:00
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static struct tilcdc_panel_info *of_get_panel_info(struct device_node *np)
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2012-12-18 16:34:16 -07:00
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{
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struct device_node *info_np;
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struct tilcdc_panel_info *info;
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int ret = 0;
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if (!np) {
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pr_err("%s: no devicenode given\n", __func__);
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return NULL;
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}
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info_np = of_get_child_by_name(np, "panel-info");
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if (!info_np) {
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pr_err("%s: could not find panel-info node\n", __func__);
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return NULL;
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}
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info = kzalloc(sizeof(*info), GFP_KERNEL);
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if (!info) {
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pr_err("%s: allocation failed\n", __func__);
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2014-09-02 06:51:16 -06:00
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of_node_put(info_np);
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2012-12-18 16:34:16 -07:00
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return NULL;
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}
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ret |= of_property_read_u32(info_np, "ac-bias", &info->ac_bias);
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ret |= of_property_read_u32(info_np, "ac-bias-intrpt", &info->ac_bias_intrpt);
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ret |= of_property_read_u32(info_np, "dma-burst-sz", &info->dma_burst_sz);
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ret |= of_property_read_u32(info_np, "bpp", &info->bpp);
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ret |= of_property_read_u32(info_np, "fdd", &info->fdd);
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ret |= of_property_read_u32(info_np, "sync-edge", &info->sync_edge);
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ret |= of_property_read_u32(info_np, "sync-ctrl", &info->sync_ctrl);
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ret |= of_property_read_u32(info_np, "raster-order", &info->raster_order);
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ret |= of_property_read_u32(info_np, "fifo-th", &info->fifo_th);
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/* optional: */
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info->tft_alt_mode = of_property_read_bool(info_np, "tft-alt-mode");
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info->invert_pxl_clk = of_property_read_bool(info_np, "invert-pxl-clk");
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if (ret) {
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pr_err("%s: error reading panel-info properties\n", __func__);
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kfree(info);
|
2014-09-02 06:51:16 -06:00
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of_node_put(info_np);
|
2012-12-18 16:34:16 -07:00
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return NULL;
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}
|
2014-09-02 06:51:16 -06:00
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of_node_put(info_np);
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2012-12-18 16:34:16 -07:00
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return info;
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}
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static int panel_probe(struct platform_device *pdev)
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{
|
2014-09-02 06:51:20 -06:00
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struct device_node *bl_node, *node = pdev->dev.of_node;
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2012-12-18 16:34:16 -07:00
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struct panel_module *panel_mod;
|
|
|
|
struct tilcdc_module *mod;
|
|
|
|
struct pinctrl *pinctrl;
|
2014-09-02 06:51:21 -06:00
|
|
|
int ret;
|
2012-12-18 16:34:16 -07:00
|
|
|
|
|
|
|
/* bail out early if no DT data: */
|
|
|
|
if (!node) {
|
|
|
|
dev_err(&pdev->dev, "device-tree data is missing\n");
|
|
|
|
return -ENXIO;
|
|
|
|
}
|
|
|
|
|
2014-09-02 06:51:19 -06:00
|
|
|
panel_mod = devm_kzalloc(&pdev->dev, sizeof(*panel_mod), GFP_KERNEL);
|
2012-12-18 16:34:16 -07:00
|
|
|
if (!panel_mod)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2014-09-02 06:51:20 -06:00
|
|
|
bl_node = of_parse_phandle(node, "backlight", 0);
|
|
|
|
if (bl_node) {
|
|
|
|
panel_mod->backlight = of_find_backlight_by_node(bl_node);
|
|
|
|
of_node_put(bl_node);
|
|
|
|
|
|
|
|
if (!panel_mod->backlight)
|
|
|
|
return -EPROBE_DEFER;
|
|
|
|
|
|
|
|
dev_info(&pdev->dev, "found backlight\n");
|
|
|
|
}
|
|
|
|
|
2015-02-11 09:32:53 -07:00
|
|
|
panel_mod->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
|
|
|
|
GPIOD_OUT_LOW);
|
2014-09-02 06:51:22 -06:00
|
|
|
if (IS_ERR(panel_mod->enable_gpio)) {
|
|
|
|
ret = PTR_ERR(panel_mod->enable_gpio);
|
2015-02-11 09:32:53 -07:00
|
|
|
dev_err(&pdev->dev, "failed to request enable GPIO\n");
|
|
|
|
goto fail_backlight;
|
2014-09-02 06:51:22 -06:00
|
|
|
}
|
|
|
|
|
2015-02-11 09:32:53 -07:00
|
|
|
if (panel_mod->enable_gpio)
|
|
|
|
dev_info(&pdev->dev, "found enable GPIO\n");
|
|
|
|
|
2012-12-18 16:34:16 -07:00
|
|
|
mod = &panel_mod->base;
|
2014-06-17 08:17:10 -06:00
|
|
|
pdev->dev.platform_data = mod;
|
2012-12-18 16:34:16 -07:00
|
|
|
|
|
|
|
tilcdc_module_init(mod, "panel", &panel_module_ops);
|
|
|
|
|
|
|
|
pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
|
|
|
|
if (IS_ERR(pinctrl))
|
|
|
|
dev_warn(&pdev->dev, "pins are not configured\n");
|
|
|
|
|
|
|
|
panel_mod->timings = of_get_display_timings(node);
|
|
|
|
if (!panel_mod->timings) {
|
|
|
|
dev_err(&pdev->dev, "could not get panel timings\n");
|
2014-09-02 06:51:21 -06:00
|
|
|
ret = -EINVAL;
|
2014-06-17 08:17:10 -06:00
|
|
|
goto fail_free;
|
2012-12-18 16:34:16 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
panel_mod->info = of_get_panel_info(node);
|
|
|
|
if (!panel_mod->info) {
|
|
|
|
dev_err(&pdev->dev, "could not get panel info\n");
|
2014-09-02 06:51:21 -06:00
|
|
|
ret = -EINVAL;
|
2014-06-17 08:17:10 -06:00
|
|
|
goto fail_timings;
|
2012-12-18 16:34:16 -07:00
|
|
|
}
|
|
|
|
|
2013-06-18 16:18:31 -06:00
|
|
|
mod->preferred_bpp = panel_mod->info->bpp;
|
|
|
|
|
2012-12-18 16:34:16 -07:00
|
|
|
return 0;
|
|
|
|
|
2014-06-17 08:17:10 -06:00
|
|
|
fail_timings:
|
|
|
|
display_timings_release(panel_mod->timings);
|
|
|
|
|
|
|
|
fail_free:
|
|
|
|
tilcdc_module_cleanup(mod);
|
2014-09-02 06:51:22 -06:00
|
|
|
|
|
|
|
fail_backlight:
|
2014-09-02 06:51:20 -06:00
|
|
|
if (panel_mod->backlight)
|
|
|
|
put_device(&panel_mod->backlight->dev);
|
2012-12-18 16:34:16 -07:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int panel_remove(struct platform_device *pdev)
|
|
|
|
{
|
2014-06-17 08:17:10 -06:00
|
|
|
struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
|
|
|
|
struct panel_module *panel_mod = to_panel_module(mod);
|
2014-09-02 06:51:20 -06:00
|
|
|
struct backlight_device *backlight = panel_mod->backlight;
|
|
|
|
|
|
|
|
if (backlight)
|
|
|
|
put_device(&backlight->dev);
|
2014-06-17 08:17:10 -06:00
|
|
|
|
|
|
|
display_timings_release(panel_mod->timings);
|
|
|
|
|
|
|
|
tilcdc_module_cleanup(mod);
|
|
|
|
kfree(panel_mod->info);
|
|
|
|
|
2012-12-18 16:34:16 -07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct of_device_id panel_of_match[] = {
|
|
|
|
{ .compatible = "ti,tilcdc,panel", },
|
|
|
|
{ },
|
|
|
|
};
|
|
|
|
|
|
|
|
struct platform_driver panel_driver = {
|
|
|
|
.probe = panel_probe,
|
|
|
|
.remove = panel_remove,
|
|
|
|
.driver = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.name = "panel",
|
|
|
|
.of_match_table = panel_of_match,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
int __init tilcdc_panel_init(void)
|
|
|
|
{
|
|
|
|
return platform_driver_register(&panel_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
void __exit tilcdc_panel_fini(void)
|
|
|
|
{
|
|
|
|
platform_driver_unregister(&panel_driver);
|
|
|
|
}
|