diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_bmc.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_bmc.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_bmc.c b/drivers/gpu/drm/mgag200/mgag200_bmc.c index 2ba2e3c5086a..23ef85aa7e37 100644 --- a/drivers/gpu/drm/mgag200/mgag200_bmc.c +++ b/drivers/gpu/drm/mgag200/mgag200_bmc.c @@ -2,8 +2,18 @@ #include <linux/delay.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_edid.h> +#include <drm/drm_managed.h> +#include <drm/drm_probe_helper.h> + #include "mgag200_drv.h" +static struct mgag200_bmc_connector *to_mgag200_bmc_connector(struct drm_connector *connector) +{ + return container_of(connector, struct mgag200_bmc_connector, base); +} + void mgag200_bmc_disable_vidrst(struct mga_device *mdev) { u8 tmp; @@ -97,3 +107,100 @@ void mgag200_bmc_enable_vidrst(struct mga_device *mdev) tmp &= ~0x10; WREG_DAC(MGA1064_GEN_IO_DATA, tmp); } + +static const struct drm_encoder_funcs mgag200_bmc_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +static int mgag200_bmc_connector_helper_detect_ctx(struct drm_connector *connector, + struct drm_modeset_acquire_ctx *ctx, + bool force) +{ + struct mgag200_bmc_connector *bmc_connector = to_mgag200_bmc_connector(connector); + struct drm_connector *physical_connector = bmc_connector->physical_connector; + + /* + * Most user-space compositors cannot handle more than one connected + * connector per CRTC. Hence, we only mark the BMC as connected if the + * physical connector is disconnected. If the physical connector's status + * is connected or unknown, the BMC remains disconnected. This has no + * effect on the output of the BMC. + * + * FIXME: Remove this logic once user-space compositors can handle more + * than one connector per CRTC. The BMC should always be connected. + */ + + if (physical_connector && physical_connector->status == connector_status_disconnected) + return connector_status_connected; + + return connector_status_disconnected; +} + +static int mgag200_bmc_connector_helper_get_modes(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct mga_device *mdev = to_mga_device(dev); + const struct mgag200_device_info *minfo = mdev->info; + + return drm_add_modes_noedid(connector, minfo->max_hdisplay, minfo->max_vdisplay); +} + +static const struct drm_connector_helper_funcs mgag200_bmc_connector_helper_funcs = { + .get_modes = mgag200_bmc_connector_helper_get_modes, + .detect_ctx = mgag200_bmc_connector_helper_detect_ctx, +}; + +static const struct drm_connector_funcs mgag200_bmc_connector_funcs = { + .reset = drm_atomic_helper_connector_reset, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int mgag200_bmc_connector_init(struct drm_device *dev, + struct mgag200_bmc_connector *bmc_connector, + struct drm_connector *physical_connector) +{ + struct drm_connector *connector = &bmc_connector->base; + int ret; + + ret = drm_connector_init(dev, connector, &mgag200_bmc_connector_funcs, + DRM_MODE_CONNECTOR_VIRTUAL); + if (ret) + return ret; + drm_connector_helper_add(connector, &mgag200_bmc_connector_helper_funcs); + + bmc_connector->physical_connector = physical_connector; + + return 0; +} + +int mgag200_bmc_output_init(struct mga_device *mdev, struct drm_connector *physical_connector) +{ + struct drm_device *dev = &mdev->base; + struct drm_crtc *crtc = &mdev->crtc; + struct drm_encoder *encoder; + struct mgag200_bmc_connector *bmc_connector; + struct drm_connector *connector; + int ret; + + encoder = &mdev->output.bmc.encoder; + ret = drm_encoder_init(dev, encoder, &mgag200_bmc_encoder_funcs, + DRM_MODE_ENCODER_VIRTUAL, NULL); + if (ret) + return ret; + encoder->possible_crtcs = drm_crtc_mask(crtc); + + bmc_connector = &mdev->output.bmc.bmc_connector; + ret = mgag200_bmc_connector_init(dev, bmc_connector, physical_connector); + if (ret) + return ret; + connector = &bmc_connector->base; + + ret = drm_connector_attach_encoder(connector, encoder); + if (ret) + return ret; + + return 0; +} |