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authorDave Airlie <airlied@redhat.com>2008-06-02 11:12:28 +1000
committerDave Airlie <airlied@redhat.com>2008-06-02 11:12:28 +1000
commit0dd000b578adec6ff101c957bce7dc9a32b76713 (patch)
treebda17b4db262f90c65a99f0a203fc892461cf880 /linux-core/drm_crtc_helper.c
parentdba95ec34315d62934ff0e493e085aa6a03cde7c (diff)
drm/modesetting: move some connector functions to helper.
Migrated the output mode collection into the helper.
Diffstat (limited to 'linux-core/drm_crtc_helper.c')
-rw-r--r--linux-core/drm_crtc_helper.c140
1 files changed, 135 insertions, 5 deletions
diff --git a/linux-core/drm_crtc_helper.c b/linux-core/drm_crtc_helper.c
index 82862b55..f1a72707 100644
--- a/linux-core/drm_crtc_helper.c
+++ b/linux-core/drm_crtc_helper.c
@@ -34,6 +34,136 @@
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
+/*
+ * Detailed mode info for a standard 640x480@60Hz monitor
+ */
+static struct drm_display_mode std_mode[] = {
+ { DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 25200, 640, 656,
+ 752, 800, 0, 480, 490, 492, 525, 0,
+ V_NHSYNC | V_NVSYNC) }, /* 640x480@60Hz */
+};
+
+/**
+ * drm_helper_probe_connector_modes - get complete set of display modes
+ * @dev: DRM device
+ * @maxX: max width for modes
+ * @maxY: max height for modes
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Based on @dev's mode_config layout, scan all the connectors and try to detect
+ * modes on them. Modes will first be added to the connector's probed_modes
+ * list, then culled (based on validity and the @maxX, @maxY parameters) and
+ * put into the normal modes list.
+ *
+ * Intended to be used either at bootup time or when major configuration
+ * changes have occurred.
+ *
+ * FIXME: take into account monitor limits
+ */
+void drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY)
+{
+ struct drm_device *dev = connector->dev;
+ struct drm_display_mode *mode, *t;
+ struct drm_connector_helper_funcs *connector_funcs = connector->helper_private;
+ int ret;
+
+ /* set all modes to the unverified state */
+ list_for_each_entry_safe(mode, t, &connector->modes, head)
+ mode->status = MODE_UNVERIFIED;
+
+ connector->status = (*connector->funcs->detect)(connector);
+
+ if (connector->status == connector_status_disconnected) {
+ DRM_DEBUG("%s is disconnected\n", drm_get_connector_name(connector));
+ /* TODO set EDID to NULL */
+ return;
+ }
+
+ ret = (*connector_funcs->get_modes)(connector);
+
+ if (ret) {
+ drm_mode_connector_list_update(connector);
+ }
+
+ if (maxX && maxY)
+ drm_mode_validate_size(dev, &connector->modes, maxX,
+ maxY, 0);
+ list_for_each_entry_safe(mode, t, &connector->modes, head) {
+ if (mode->status == MODE_OK)
+ mode->status = (*connector_funcs->mode_valid)(connector,mode);
+ }
+
+
+ drm_mode_prune_invalid(dev, &connector->modes, TRUE);
+
+ if (list_empty(&connector->modes)) {
+ struct drm_display_mode *stdmode;
+
+ DRM_DEBUG("No valid modes on %s\n", drm_get_connector_name(connector));
+
+ /* Should we do this here ???
+ * When no valid EDID modes are available we end up
+ * here and bailed in the past, now we add a standard
+ * 640x480@60Hz mode and carry on.
+ */
+ stdmode = drm_mode_duplicate(dev, &std_mode[0]);
+ drm_mode_probed_add(connector, stdmode);
+ drm_mode_list_concat(&connector->probed_modes,
+ &connector->modes);
+
+ DRM_DEBUG("Adding standard 640x480 @ 60Hz to %s\n",
+ drm_get_connector_name(connector));
+ }
+
+ drm_mode_sort(&connector->modes);
+
+ DRM_DEBUG("Probed modes for %s\n", drm_get_connector_name(connector));
+ list_for_each_entry_safe(mode, t, &connector->modes, head) {
+ mode->vrefresh = drm_mode_vrefresh(mode);
+
+ drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
+ drm_mode_debug_printmodeline(mode);
+ }
+}
+EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
+
+void drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX, uint32_t maxY)
+{
+ struct drm_connector *connector;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ drm_helper_probe_single_connector_modes(connector, maxX, maxY);
+ }
+}
+EXPORT_SYMBOL(drm_helper_probe_connector_modes);
+
+
+/**
+ * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
+ * @crtc: CRTC to check
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Walk @crtc's DRM device's mode_config and see if it's in use.
+ *
+ * RETURNS:
+ * True if @crtc is part of the mode_config, false otherwise.
+ */
+bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
+{
+ struct drm_encoder *encoder;
+ struct drm_device *dev = crtc->dev;
+ /* FIXME: Locking around list access? */
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
+ if (encoder->crtc == crtc)
+ return true;
+ return false;
+}
+EXPORT_SYMBOL(drm_helper_crtc_in_use);
+
/**
* drm_disable_unused_functions - disable unused objects
* @dev: DRM device
@@ -81,8 +211,8 @@ static void drm_pick_crtcs (struct drm_device *dev)
int found;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
- connector->encoder->crtc = NULL;
-
+ connector->encoder->crtc = NULL;
+
/* Don't hook up connectors that are disconnected ??
*
* This is debateable. Do we want fixed /dev/fbX or
@@ -211,7 +341,7 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mo
adjusted_mode = drm_mode_duplicate(dev, mode);
- crtc->enabled = drm_crtc_in_use(crtc);
+ crtc->enabled = drm_helper_crtc_in_use(crtc);
if (!crtc->enabled)
return true;
@@ -456,7 +586,7 @@ bool drm_helper_initial_config(struct drm_device *dev, bool can_grow)
mutex_lock(&dev->mode_config.mutex);
- drm_crtc_probe_connector_modes(dev, 2048, 2048);
+ drm_helper_probe_connector_modes(dev, 2048, 2048);
drm_pick_crtcs(dev);
@@ -518,7 +648,7 @@ int drm_helper_hotplug_stage_two(struct drm_device *dev, struct drm_connector *c
has_config = 1;
}
- drm_crtc_probe_connector_modes(dev, 2048, 2048);
+ drm_helper_probe_connector_modes(dev, 2048, 2048);
if (!has_config)
drm_pick_crtcs(dev);