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authorAlan Cox <alan@linux.intel.com>2012-04-25 14:38:32 +0100
committerDave Airlie <airlied@redhat.com>2012-04-27 09:24:21 +0100
commitae0a246aef0d185db2947912fe9cf7dae1d91b7a (patch)
tree05c7256420a977a3dc3d1792de34d5be47a51060 /drivers/gpu/drm/gma500/cdv_device.c
parent68cb638f9219eeb4967adf08587f4aba64923c3a (diff)
gma500: Add the base elements of CDV hotplug support
Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/gma500/cdv_device.c')
-rw-r--r--drivers/gpu/drm/gma500/cdv_device.c41
1 files changed, 39 insertions, 2 deletions
diff --git a/drivers/gpu/drm/gma500/cdv_device.c b/drivers/gpu/drm/gma500/cdv_device.c
index 5cc06a8fcb7a..62f9b735459b 100644
--- a/drivers/gpu/drm/gma500/cdv_device.c
+++ b/drivers/gpu/drm/gma500/cdv_device.c
@@ -462,13 +462,48 @@ static void cdv_get_core_freq(struct drm_device *dev)
}
}
+static void cdv_hotplug_work_func(struct work_struct *work)
+{
+ struct drm_psb_private *dev_priv = container_of(work, struct drm_psb_private,
+ hotplug_work);
+ struct drm_device *dev = dev_priv->dev;
+
+ /* Just fire off a uevent and let userspace tell us what to do */
+ drm_helper_hpd_irq_event(dev);
+}
+
+/* The core driver has received a hotplug IRQ. We are in IRQ context
+ so extract the needed information and kick off queued processing */
+
+static int cdv_hotplug_event(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ schedule_work(&dev_priv->hotplug_work);
+ REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
+ return 1;
+}
+
+static void cdv_hotplug_enable(struct drm_device *dev, bool on)
+{
+ if (on) {
+ u32 hotplug = REG_READ(PORT_HOTPLUG_EN);
+ hotplug |= HDMIB_HOTPLUG_INT_EN | HDMIC_HOTPLUG_INT_EN |
+ HDMID_HOTPLUG_INT_EN | CRT_HOTPLUG_INT_EN;
+ REG_WRITE(PORT_HOTPLUG_EN, hotplug);
+ } else {
+ REG_WRITE(PORT_HOTPLUG_EN, 0);
+ REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
+ }
+}
+
static int cdv_chip_setup(struct drm_device *dev)
{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ INIT_WORK(&dev_priv->hotplug_work, cdv_hotplug_work_func);
cdv_get_core_freq(dev);
gma_intel_opregion_init(dev);
psb_intel_init_bios(dev);
- REG_WRITE(PORT_HOTPLUG_EN, 0);
- REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
+ cdv_hotplug_enable(dev, false);
return 0;
}
@@ -489,6 +524,8 @@ const struct psb_ops cdv_chip_ops = {
.crtc_funcs = &cdv_intel_crtc_funcs,
.output_init = cdv_output_init,
+ .hotplug = cdv_hotplug_event,
+ .hotplug_enable = cdv_hotplug_enable,
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
.backlight_init = cdv_backlight_init,