From c780bee65d7bb5aa637147ca64f4a5d51716dc1d Mon Sep 17 00:00:00 2001 From: Zhao Yakui Date: Mon, 6 Apr 2009 19:40:19 -0700 Subject: [PATCH] drm/i915: Sync crt hotplug detection with intel video driver upstream commit: 771cb081354161eea21534ba58e5cc1a2db94a25 This covers: Use long crt hotplug activation time on GM45. Signed-off-by: Zhao Yakui Signed-off-by: Eric Anholt Signed-off-by: Chris Wright --- drivers/gpu/drm/i915/i915_reg.h | 16 ++++++++++++ drivers/gpu/drm/i915/intel_crt.c | 45 +++++++++++++++++++++++--------- 2 files changed, 48 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 90600d899413..cc2938d94a97 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -629,6 +629,22 @@ #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) diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index dcaed3466e83..61c108eef13f 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -133,20 +133,39 @@ 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; - - unsigned long timeout = jiffies + msecs_to_jiffies(1000); - - temp = I915_READ(PORT_HOTPLUG_EN); - - I915_WRITE(PORT_HOTPLUG_EN, - temp | CRT_HOTPLUG_FORCE_DETECT | (1 << 5)); + u32 hotplug_en; + int i, tries = 0; + /* + * On 4 series desktop, CRT detect sequence need to be done twice + * to get a reliable result. + */ - do { - if (!(I915_READ(PORT_HOTPLUG_EN) & CRT_HOTPLUG_FORCE_DETECT)) - break; - msleep(1); - } while (time_after(timeout, jiffies)); + 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; + + if (IS_GM45(dev)) + hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; + + 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)) + break; + msleep(1); + } while (time_after(timeout, jiffies)); + } if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) == CRT_HOTPLUG_MONITOR_COLOR) -- 2.39.5