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drm/i915: Sync crt hotplug detection with intel video driver 

This covers:
Use long crt hotplug activation time on GM45.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhao Yakui 2009-03-03 18:07:52 +08:00 committed by Eric Anholt
parent 6bcdcd9e3c
commit 771cb08135
2 changed files with 45 additions and 10 deletions
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16
drivers/gpu/drm/i915/i915_reg.h
View File

@ -633,6 +633,22 @@
#define TV_HOTPLUG_INT_EN (1 << 18)
#define CRT_HOTPLUG_INT_EN (1 << 9)
#define CRT_HOTPLUG_FORCE_DETECT (1 << 3)
#define CRT_HOTPLUG_ACTIVATION_PERIOD_32 (0 << 8)
/* must use period 64 on GM45 according to docs */
#define CRT_HOTPLUG_ACTIVATION_PERIOD_64 (1 << 8)
#define CRT_HOTPLUG_DAC_ON_TIME_2M (0 << 7)
#define CRT_HOTPLUG_DAC_ON_TIME_4M (1 << 7)
#define CRT_HOTPLUG_VOLTAGE_COMPARE_40 (0 << 5)
#define CRT_HOTPLUG_VOLTAGE_COMPARE_50 (1 << 5)
#define CRT_HOTPLUG_VOLTAGE_COMPARE_60 (2 << 5)
#define CRT_HOTPLUG_VOLTAGE_COMPARE_70 (3 << 5)
#define CRT_HOTPLUG_VOLTAGE_COMPARE_MASK (3 << 5)
#define CRT_HOTPLUG_DETECT_DELAY_1G (0 << 4)
#define CRT_HOTPLUG_DETECT_DELAY_2G (1 << 4)
#define CRT_HOTPLUG_DETECT_VOLTAGE_325MV (0 << 2)
#define CRT_HOTPLUG_DETECT_VOLTAGE_475MV (1 << 2)
#define CRT_HOTPLUG_MASK (0x3fc) /* Bits 9-2 */
#define PORT_HOTPLUG_STAT 0x61114
#define HDMIB_HOTPLUG_INT_STATUS (1 << 29)

31
drivers/gpu/drm/i915/intel_crt.c
View File

@ -146,20 +146,39 @@ static bool intel_crt_detect_hotplug(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 temp;
u32 hotplug_en;
int i, tries = 0;
/*
* On 4 series desktop, CRT detect sequence need to be done twice
* to get a reliable result.
*/
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
if (IS_G4X(dev) && !IS_GM45(dev))
tries = 2;
else
tries = 1;
hotplug_en = I915_READ(PORT_HOTPLUG_EN);
hotplug_en &= ~(CRT_HOTPLUG_MASK);
hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
temp = I915_READ(PORT_HOTPLUG_EN);
if (IS_GM45(dev))
hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
I915_WRITE(PORT_HOTPLUG_EN,
temp | CRT_HOTPLUG_FORCE_DETECT | (1 << 5));
hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
for (i = 0; i < tries ; i++) {
unsigned long timeout;
/* turn on the FORCE_DETECT */
I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
timeout = jiffies + msecs_to_jiffies(1000);
/* wait for FORCE_DETECT to go off */
do {
if (!(I915_READ(PORT_HOTPLUG_EN) & CRT_HOTPLUG_FORCE_DETECT))
if (!(I915_READ(PORT_HOTPLUG_EN) &
CRT_HOTPLUG_FORCE_DETECT))
break;
msleep(1);
} while (time_after(timeout, jiffies));
}
if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
CRT_HOTPLUG_MONITOR_COLOR)