I like this live status!
On Mon, Jan 02, 2017 at 05:01:02PM +0530, vathsala nagaraju wrote:
> 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)
>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: Jim Bride <jim.bride@xxxxxxxxxxxxxxx>
> Signed-off-by: Vathsala Nagaraju <vathsala.nagaraju@xxxxxxxxx>
> Signed-off-by: Patil Deepti <deepti.patil@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 24 ++++++++++++++++++++++++
> drivers/gpu/drm/i915/i915_reg.h | 2 ++
> 2 files changed, 26 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index 9d7b5a8..8b0e3f9 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -2606,6 +2606,30 @@ 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",
Fs? all others are fully capital
> + "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 <= EDP_PSR2_STATUS_TG_ON)
I like this protection...
> + 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 0cbe564..03a14d9 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -3624,6 +3624,8 @@ enum {
>
> #define EDP_PSR2_STATUS_CTL _MMIO(0x6f940)
> #define EDP_PSR2_STATUS_STATE_MASK (0xf<<28)
> +#define EDP_PSR2_STATUS_STATE_SHIFT 28
> +#define EDP_PSR2_STATUS_TG_ON 0xa
... but I don't like how this TG_ON is defined,
because following the general style
EDP_PSR2_STATUS_TG_ON should be (0xa<<28)
so it might confuse people...
maybe just remove this and use the protection with size of live_status?
>
> /* VGA port control */
> #define ADPA _MMIO(0x61100)
> --
> 1.9.1
>
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