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i915: TV hotplug fixes 

In order to avoid recursive ->detect->interrupt->detect->interrupt->...
we need to disable TV hotplug interrupts in
intel_tv.c:intel_tv_detect_type.  We also need to enable the TV interrupt
detection and hotplug sequence properly in i915_irq.c.
main
Jesse Barnes 2008-05-12 15:47:19 -07:00
parent a51e38548c
commit d32ce7f621
2 changed files with 36 additions and 8 deletions
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19
linux-core/intel_tv.c
View File

@ -1360,11 +1360,21 @@ intel_tv_detect_type (struct drm_crtc *crtc, struct drm_output *output)
struct drm_device *dev = output->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_output *intel_output = output->driver_private;
u32 pipeastat, pipeastat_save;
u32 tv_ctl, save_tv_ctl;
u32 tv_dac, save_tv_dac;
int type = ConnectorUnknown;
tv_dac = I915_READ(TV_DAC);
/* Disable TV interrupts around load detect or we'll recurse */
pipeastat = I915_READ(I915REG_PIPEASTAT);
pipeastat_save = pipeastat;
pipeastat &= ~I915_HOTPLUG_INTERRUPT_ENABLE;
pipeastat &= ~I915_HOTPLUG_TV_INTERRUPT_ENABLE;
I915_WRITE(I915REG_PIPEASTAT, pipeastat | I915_HOTPLUG_TV_CLEAR |
I915_HOTPLUG_CLEAR);
/*
* Detect TV by polling)
*/
@ -1412,6 +1422,10 @@ intel_tv_detect_type (struct drm_crtc *crtc, struct drm_output *output)
type = -1;
}
/* Restore interrupt config */
I915_WRITE(I915REG_PIPEASTAT, pipeastat_save | I915_HOTPLUG_TV_CLEAR |
I915_HOTPLUG_CLEAR);
return type;
}
@ -1434,10 +1448,15 @@ intel_tv_detect(struct drm_output *output)
mode = reported_modes[0];
drm_mode_set_crtcinfo(&mode, CRTC_INTERLACE_HALVE_V);
if (output->crtc) {
type = intel_tv_detect_type(output->crtc, output);
} else {
crtc = intel_get_load_detect_pipe(output, &mode, &dpms_mode);
if (crtc) {
type = intel_tv_detect_type(crtc, output);
intel_release_load_detect_pipe(output, dpms_mode);
} else
type = -1;
}
if (type != tv_priv->type) {

17
shared-core/i915_irq.c
View File

@ -471,7 +471,6 @@ static void i915_hotplug_tv(struct drm_device *dev)
if (iout == 0)
goto unlock;
/* may need to I915_WRITE(TVDAC, 1<<31) to ack the interrupt */
status = output->funcs->detect(output);
drm_hotplug_stage_two(dev, output,
status == output_status_connected ? 1 : 0);
@ -631,7 +630,7 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
struct drm_i915_master_private *master_priv;
struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
u32 iir;
u32 pipea_stats, pipeb_stats;
u32 pipea_stats = 0, pipeb_stats, tvdac;
int hotplug = 0;
int vblank = 0;
@ -672,10 +671,17 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
}
/* This is a global event, and not a pipe A event */
if ((pipea_stats & I915_HOTPLUG_INTERRUPT_STATUS) ||
(pipea_stats & I915_HOTPLUG_TV_INTERRUPT_STATUS))
if (pipea_stats & I915_HOTPLUG_INTERRUPT_STATUS)
hotplug = 1;
if (pipea_stats & I915_HOTPLUG_TV_INTERRUPT_STATUS) {
hotplug = 1;
/* Toggle hotplug detection to clear hotplug status */
tvdac = I915_READ(TV_DAC);
I915_WRITE(TV_DAC, tvdac & ~TVDAC_STATE_CHG_EN);
I915_WRITE(TV_DAC, tvdac | TVDAC_STATE_CHG_EN);
}
I915_WRITE(I915REG_PIPEASTAT, pipea_stats);
}
@ -1001,6 +1007,9 @@ void i915_enable_interrupt (struct drm_device *dev)
I915_WRITE(SDVOB, I915_READ(SDVOB) | SDVO_INTERRUPT_ENABLE);
I915_WRITE(SDVOC, I915_READ(SDVOC) | SDVO_INTERRUPT_ENABLE);
/* TV */
I915_WRITE(TV_DAC, I915_READ(TV_DAC) | TVDAC_STATE_CHG_EN);
} else {
/* DVO ???? */
}