From: Chris Wilson Date: Fri, 11 May 2012 17:01:32 +0000 (+0100) Subject: drm/i915: Inspect the right status bits for DP/HDMI hotplug on gen4 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=10f76a38166cd51160b3cd7ba2f16339dd381589;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git drm/i915: Inspect the right status bits for DP/HDMI hotplug on gen4 The status bits corresponding to the interrupt enable bits are the "live" hotplug status bits, and reflect the current status of the port (high for a detected connection, low for a disconnect). The actual bits corresponding to the interrupt source are elsewhere. The actual event is then determined by a combination of the interrupt flag and the current live status (if the interrupt is active, but the current status is not, then we have detected a disconnect.) Signed-off-by: Chris Wilson Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 2d49b9507ed0..7e0977b0ff2b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1558,12 +1558,21 @@ #define CRT_HOTPLUG_DETECT_VOLTAGE_475MV (1 << 2) #define PORT_HOTPLUG_STAT 0x61114 -#define HDMIB_HOTPLUG_INT_STATUS (1 << 29) -#define DPB_HOTPLUG_INT_STATUS (1 << 29) -#define HDMIC_HOTPLUG_INT_STATUS (1 << 28) -#define DPC_HOTPLUG_INT_STATUS (1 << 28) -#define HDMID_HOTPLUG_INT_STATUS (1 << 27) -#define DPD_HOTPLUG_INT_STATUS (1 << 27) +/* HDMI/DP bits are gen4+ */ +#define DPB_HOTPLUG_LIVE_STATUS (1 << 29) +#define DPC_HOTPLUG_LIVE_STATUS (1 << 28) +#define DPD_HOTPLUG_LIVE_STATUS (1 << 27) +#define DPD_HOTPLUG_INT_STATUS (3 << 21) +#define DPC_HOTPLUG_INT_STATUS (3 << 19) +#define DPB_HOTPLUG_INT_STATUS (3 << 17) +/* HDMI bits are shared with the DP bits */ +#define HDMIB_HOTPLUG_LIVE_STATUS (1 << 29) +#define HDMIC_HOTPLUG_LIVE_STATUS (1 << 28) +#define HDMID_HOTPLUG_LIVE_STATUS (1 << 27) +#define HDMID_HOTPLUG_INT_STATUS (3 << 21) +#define HDMIC_HOTPLUG_INT_STATUS (3 << 19) +#define HDMIB_HOTPLUG_INT_STATUS (3 << 17) +/* CRT/TV/SDVO common between gen3+ */ #define CRT_HOTPLUG_INT_STATUS (1 << 11) #define TV_HOTPLUG_INT_STATUS (1 << 10) #define CRT_HOTPLUG_MONITOR_MASK (3 << 8) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index a1a5ce71558a..c686393abe6d 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2066,25 +2066,23 @@ g4x_dp_detect(struct intel_dp *intel_dp) { struct drm_device *dev = intel_dp->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t temp, bit; + uint32_t bit; switch (intel_dp->output_reg) { case DP_B: - bit = DPB_HOTPLUG_INT_STATUS; + bit = DPB_HOTPLUG_LIVE_STATUS; break; case DP_C: - bit = DPC_HOTPLUG_INT_STATUS; + bit = DPC_HOTPLUG_LIVE_STATUS; break; case DP_D: - bit = DPD_HOTPLUG_INT_STATUS; + bit = DPD_HOTPLUG_LIVE_STATUS; break; default: return connector_status_unknown; } - temp = I915_READ(PORT_HOTPLUG_STAT); - - if ((temp & bit) == 0) + if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) return connector_status_disconnected; return intel_dp_detect_dpcd(intel_dp);