diff options
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_encoder.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_encoder.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c new file mode 100644 index 000000000..fcdf4b0a8 --- /dev/null +++ b/drivers/gpu/drm/omapdrm/omap_encoder.c @@ -0,0 +1,193 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Rob Clark <rob@ti.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/list.h> + +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_edid.h> + +#include "omap_drv.h" + +/* + * encoder funcs + */ + +#define to_omap_encoder(x) container_of(x, struct omap_encoder, base) + +/* The encoder and connector both map to same dssdev.. the encoder + * handles the 'active' parts, ie. anything the modifies the state + * of the hw, and the connector handles the 'read-only' parts, like + * detecting connection and reading edid. + */ +struct omap_encoder { + struct drm_encoder base; + struct omap_dss_device *dssdev; +}; + +struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder) +{ + struct omap_encoder *omap_encoder = to_omap_encoder(encoder); + + return omap_encoder->dssdev; +} + +static void omap_encoder_destroy(struct drm_encoder *encoder) +{ + struct omap_encoder *omap_encoder = to_omap_encoder(encoder); + + drm_encoder_cleanup(encoder); + kfree(omap_encoder); +} + +static const struct drm_encoder_funcs omap_encoder_funcs = { + .destroy = omap_encoder_destroy, +}; + +static void omap_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct drm_device *dev = encoder->dev; + struct omap_encoder *omap_encoder = to_omap_encoder(encoder); + struct omap_dss_device *dssdev = omap_encoder->dssdev; + struct drm_connector *connector; + bool hdmi_mode; + int r; + + hdmi_mode = false; + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + if (connector->encoder == encoder) { + hdmi_mode = omap_connector_get_hdmi_mode(connector); + break; + } + } + + if (dssdev->driver->set_hdmi_mode) + dssdev->driver->set_hdmi_mode(dssdev, hdmi_mode); + + if (hdmi_mode && dssdev->driver->set_hdmi_infoframe) { + struct hdmi_avi_infoframe avi; + + r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode, + false); + if (r == 0) + dssdev->driver->set_hdmi_infoframe(dssdev, &avi); + } +} + +static void omap_encoder_disable(struct drm_encoder *encoder) +{ + struct omap_encoder *omap_encoder = to_omap_encoder(encoder); + struct omap_dss_device *dssdev = omap_encoder->dssdev; + struct omap_dss_driver *dssdrv = dssdev->driver; + + dssdrv->disable(dssdev); +} + +static int omap_encoder_update(struct drm_encoder *encoder, + enum omap_channel channel, + struct videomode *vm) +{ + struct drm_device *dev = encoder->dev; + struct omap_encoder *omap_encoder = to_omap_encoder(encoder); + struct omap_dss_device *dssdev = omap_encoder->dssdev; + struct omap_dss_driver *dssdrv = dssdev->driver; + int ret; + + if (dssdrv->check_timings) { + ret = dssdrv->check_timings(dssdev, vm); + } else { + struct videomode t = {0}; + + dssdrv->get_timings(dssdev, &t); + + if (memcmp(vm, &t, sizeof(*vm))) + ret = -EINVAL; + else + ret = 0; + } + + if (ret) { + dev_err(dev->dev, "could not set timings: %d\n", ret); + return ret; + } + + if (dssdrv->set_timings) + dssdrv->set_timings(dssdev, vm); + + return 0; +} + +static void omap_encoder_enable(struct drm_encoder *encoder) +{ + struct omap_encoder *omap_encoder = to_omap_encoder(encoder); + struct omap_dss_device *dssdev = omap_encoder->dssdev; + struct omap_dss_driver *dssdrv = dssdev->driver; + int r; + + omap_encoder_update(encoder, omap_crtc_channel(encoder->crtc), + omap_crtc_timings(encoder->crtc)); + + r = dssdrv->enable(dssdev); + if (r) + dev_err(encoder->dev->dev, + "Failed to enable display '%s': %d\n", + dssdev->name, r); +} + +static int omap_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + return 0; +} + +static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = { + .mode_set = omap_encoder_mode_set, + .disable = omap_encoder_disable, + .enable = omap_encoder_enable, + .atomic_check = omap_encoder_atomic_check, +}; + +/* initialize encoder */ +struct drm_encoder *omap_encoder_init(struct drm_device *dev, + struct omap_dss_device *dssdev) +{ + struct drm_encoder *encoder = NULL; + struct omap_encoder *omap_encoder; + + omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL); + if (!omap_encoder) + goto fail; + + omap_encoder->dssdev = dssdev; + + encoder = &omap_encoder->base; + + drm_encoder_init(dev, encoder, &omap_encoder_funcs, + DRM_MODE_ENCODER_TMDS, NULL); + drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs); + + return encoder; + +fail: + if (encoder) + omap_encoder_destroy(encoder); + + return NULL; +} |