diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c index 9f40a44b456b..3459b9ec56c9 100644 --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c @@ -12,6 +12,7 @@ #include <drm/drm_crtc_helper.h> #include "sun8i_dw_hdmi.h" +#include "sun8i_tcon_top.h" static void sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, @@ -41,6 +42,48 @@ sun8i_dw_hdmi_mode_valid(struct drm_connector *connector, return MODE_OK; } +static bool sun8i_dw_hdmi_node_is_tcon_top(struct device_node *node) +{ + return !!of_match_node(sun8i_tcon_top_of_table, node); +} + +static u32 sun8i_dw_hdmi_find_possible_crtcs(struct drm_device *drm, + struct device_node *node) +{ + struct device_node *port, *ep, *remote, *remote_port; + u32 crtcs = 0; + + port = of_graph_get_port_by_id(node, 0); + if (!port) + return 0; + + ep = of_get_next_available_child(port, NULL); + if (!ep) + return 0; + + remote = of_graph_get_remote_port_parent(ep); + if (!remote) + return 0; + + if (sun8i_dw_hdmi_node_is_tcon_top(remote)) { + port = of_graph_get_port_by_id(remote, 4); + if (!port) + return 0; + + for_each_child_of_node(port, ep) { + remote_port = of_graph_get_remote_port(ep); + if (remote_port) { + crtcs |= drm_of_crtc_port_mask(drm, remote_port); + of_node_put(remote_port); + } + } + } else { + crtcs = drm_of_find_possible_crtcs(drm, node); + } + + return crtcs; +} + static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, void *data) { @@ -63,7 +106,8 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, hdmi->dev = &pdev->dev; encoder = &hdmi->encoder; - encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); + encoder->possible_crtcs = + sun8i_dw_hdmi_find_possible_crtcs(drm, dev->of_node); /* * If we failed to find the CRTC(s) which this encoder is * supposed to be connected to, it's because the CRTC has |