diff options
Diffstat (limited to 'drivers/gpu/drm/msm/disp/mdp4/mdp4_lvds_connector.c')
-rw-r--r-- | drivers/gpu/drm/msm/disp/mdp4/mdp4_lvds_connector.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_lvds_connector.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_lvds_connector.c new file mode 100644 index 000000000000..e3b1c86b7aae --- /dev/null +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_lvds_connector.c @@ -0,0 +1,135 @@ +/* + * Copyright (C) 2014 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + * Author: Vinay Simha <vinaysimha@inforcecomputing.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/gpio.h> + +#include "mdp4_kms.h" + +struct mdp4_lvds_connector { + struct drm_connector base; + struct drm_encoder *encoder; + struct device_node *panel_node; + struct drm_panel *panel; +}; +#define to_mdp4_lvds_connector(x) container_of(x, struct mdp4_lvds_connector, base) + +static enum drm_connector_status mdp4_lvds_connector_detect( + struct drm_connector *connector, bool force) +{ + struct mdp4_lvds_connector *mdp4_lvds_connector = + to_mdp4_lvds_connector(connector); + + if (!mdp4_lvds_connector->panel) + mdp4_lvds_connector->panel = + of_drm_find_panel(mdp4_lvds_connector->panel_node); + + return mdp4_lvds_connector->panel ? + connector_status_connected : + connector_status_disconnected; +} + +static void mdp4_lvds_connector_destroy(struct drm_connector *connector) +{ + struct mdp4_lvds_connector *mdp4_lvds_connector = + to_mdp4_lvds_connector(connector); + + drm_connector_cleanup(connector); + + kfree(mdp4_lvds_connector); +} + +static int mdp4_lvds_connector_get_modes(struct drm_connector *connector) +{ + struct mdp4_lvds_connector *mdp4_lvds_connector = + to_mdp4_lvds_connector(connector); + struct drm_panel *panel = mdp4_lvds_connector->panel; + int ret = 0; + + if (panel) { + drm_panel_attach(panel, connector); + + ret = panel->funcs->get_modes(panel); + + drm_panel_detach(panel); + } + + return ret; +} + +static int mdp4_lvds_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct mdp4_lvds_connector *mdp4_lvds_connector = + to_mdp4_lvds_connector(connector); + struct drm_encoder *encoder = mdp4_lvds_connector->encoder; + long actual, requested; + + requested = 1000 * mode->clock; + actual = mdp4_lcdc_round_pixclk(encoder, requested); + + DBG("requested=%ld, actual=%ld", requested, actual); + + if (actual != requested) + return MODE_CLOCK_RANGE; + + return MODE_OK; +} + +static const struct drm_connector_funcs mdp4_lvds_connector_funcs = { + .detect = mdp4_lvds_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = mdp4_lvds_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static const struct drm_connector_helper_funcs mdp4_lvds_connector_helper_funcs = { + .get_modes = mdp4_lvds_connector_get_modes, + .mode_valid = mdp4_lvds_connector_mode_valid, +}; + +/* initialize connector */ +struct drm_connector *mdp4_lvds_connector_init(struct drm_device *dev, + struct device_node *panel_node, struct drm_encoder *encoder) +{ + struct drm_connector *connector = NULL; + struct mdp4_lvds_connector *mdp4_lvds_connector; + + mdp4_lvds_connector = kzalloc(sizeof(*mdp4_lvds_connector), GFP_KERNEL); + if (!mdp4_lvds_connector) + return ERR_PTR(-ENOMEM); + + mdp4_lvds_connector->encoder = encoder; + mdp4_lvds_connector->panel_node = panel_node; + + connector = &mdp4_lvds_connector->base; + + drm_connector_init(dev, connector, &mdp4_lvds_connector_funcs, + DRM_MODE_CONNECTOR_LVDS); + drm_connector_helper_add(connector, &mdp4_lvds_connector_helper_funcs); + + connector->polled = 0; + + connector->interlace_allowed = 0; + connector->doublescan_allowed = 0; + + drm_mode_connector_attach_encoder(connector, encoder); + + return connector; +} |