From 6ba1f9e1772f3ff9dc18e81fc01fa97c059b1d06 Mon Sep 17 00:00:00 2001 From: "Nagaraju, Vathsala" Date: Fri, 6 Jan 2017 22:02:32 +0530 Subject: [PATCH] drm/i915/psr: report live PSR2 State Reports live state of PSR2 form PSR2_STATUS register. bit field 31:28 gives the live state of PSR2. It can be used to check if system is in deep sleep, selective update or selective update standby. During video play back, we can use this to check if system is entering SU mode or not. when system is in idle state, DEEP_SLEEP(8) must be entered. When video playback is happening, system must be in SLEEP(3 / selective update) or SU_STANDBY( 6 / selective update standby) v2: (Rodrigo) - Remove EDP_PSR2_STATUS_TG_ON=a ,instead use ARRAY_SIZE Cc: Rodrigo Vivi Cc: Jim Bride Signed-off-by: Vathsala Nagaraju Signed-off-by: Patil Deepti Reviewed-by: Rodrigo Vivi Signed-off-by: Rodrigo Vivi Link: http://patchwork.freedesktop.org/patch/msgid/1483720352-24761-1-git-send-email-vathsala.nagaraju@intel.com --- drivers/gpu/drm/i915/i915_debugfs.c | 24 ++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 25 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index e367f06f5883..32ede342ab94 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2633,6 +2633,30 @@ static int i915_edp_psr_status(struct seq_file *m, void *data) seq_printf(m, "Performance_Counter: %u\n", psrperf); } + if (dev_priv->psr.psr2_support) { + static const char * const live_status[] = { + "IDLE", + "CAPTURE", + "CAPTURE_FS", + "SLEEP", + "BUFON_FW", + "ML_UP", + "SU_STANDBY", + "FAST_SLEEP", + "DEEP_SLEEP", + "BUF_ON", + "TG_ON" }; + u8 pos = (I915_READ(EDP_PSR2_STATUS_CTL) & + EDP_PSR2_STATUS_STATE_MASK) >> + EDP_PSR2_STATUS_STATE_SHIFT; + + seq_printf(m, "PSR2_STATUS_EDP: %x\n", + I915_READ(EDP_PSR2_STATUS_CTL)); + + if (pos < ARRAY_SIZE(live_status)) + seq_printf(m, "PSR2 live state %s\n", + live_status[pos]); + } mutex_unlock(&dev_priv->psr.lock); intel_runtime_pm_put(dev_priv); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index ca76887120ee..72f9f36ae5ce 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3621,6 +3621,7 @@ enum { #define EDP_PSR2_STATUS_CTL _MMIO(0x6f940) #define EDP_PSR2_STATUS_STATE_MASK (0xf<<28) +#define EDP_PSR2_STATUS_STATE_SHIFT 28 /* VGA port control */ #define ADPA _MMIO(0x61100) -- 2.20.1