diff options
Diffstat (limited to 'drivers/gpu/drm/arc/arcpgu_sim.c')
-rw-r--r-- | drivers/gpu/drm/arc/arcpgu_sim.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/gpu/drm/arc/arcpgu_sim.c b/drivers/gpu/drm/arc/arcpgu_sim.c new file mode 100644 index 0000000..2bf06d7 --- /dev/null +++ b/drivers/gpu/drm/arc/arcpgu_sim.c @@ -0,0 +1,128 @@ +/* + * ARC PGU DRM driver. + * + * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.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. + * + */ + +#include <drm/drm_crtc_helper.h> +#include <drm/drm_encoder_slave.h> +#include <drm/drm_atomic_helper.h> + +#include "arcpgu.h" + +#define XRES_DEF 640 +#define YRES_DEF 480 + +#define XRES_MAX 8192 +#define YRES_MAX 8192 + + +struct arcpgu_drm_connector { + struct drm_connector connector; + struct drm_encoder_slave *encoder_slave; +}; + +static int arcpgu_drm_connector_get_modes(struct drm_connector *connector) +{ + int count; + + count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); + drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); + return count; +} + +static enum drm_connector_status +arcpgu_drm_connector_detect(struct drm_connector *connector, bool force) +{ + return connector_status_connected; +} + +static void arcpgu_drm_connector_destroy(struct drm_connector *connector) +{ + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static const struct drm_connector_helper_funcs +arcpgu_drm_connector_helper_funcs = { + .get_modes = arcpgu_drm_connector_get_modes, +}; + +static const struct drm_connector_funcs arcpgu_drm_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .reset = drm_atomic_helper_connector_reset, + .detect = arcpgu_drm_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = arcpgu_drm_connector_destroy, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np) +{ + struct arcpgu_drm_connector *arcpgu_connector; + struct drm_encoder_slave *encoder; + struct drm_connector *connector; + int ret; + + encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL); + if (encoder == NULL) + return -ENOMEM; + + encoder->base.possible_crtcs = 1; + encoder->base.possible_clones = 0; + + ret = drm_encoder_init(drm, &encoder->base, &arcpgu_drm_encoder_funcs, + DRM_MODE_ENCODER_VIRTUAL, NULL); + if (ret) + return ret; + + arcpgu_connector = devm_kzalloc(drm->dev, sizeof(*arcpgu_connector), + GFP_KERNEL); + if (!arcpgu_connector) { + ret = -ENOMEM; + goto error_encoder_cleanup; + } + + connector = &arcpgu_connector->connector; + drm_connector_helper_add(connector, &arcpgu_drm_connector_helper_funcs); + + ret = drm_connector_init(drm, connector, &arcpgu_drm_connector_funcs, + DRM_MODE_CONNECTOR_VIRTUAL); + if (ret < 0) { + dev_err(drm->dev, "failed to initialize drm connector\n"); + goto error_encoder_cleanup; + } + + ret = drm_mode_connector_attach_encoder(connector, &encoder->base); + if (ret < 0) { + dev_err(drm->dev, "could not attach connector to encoder\n"); + drm_connector_unregister(connector); + goto error_connector_cleanup; + } + + arcpgu_connector->encoder_slave = encoder; + + return 0; + +error_connector_cleanup: + drm_connector_cleanup(connector); + +error_encoder_cleanup: + drm_encoder_cleanup(&encoder->base); + return ret; +} |