diff options
| author | José Roberto de Souza <jose.souza@intel.com> | 2018-11-06 22:08:41 +0300 |
|---|---|---|
| committer | José Roberto de Souza <jose.souza@intel.com> | 2018-11-09 21:49:38 +0300 |
| commit | b2fc2252ce41d004a23be7dd90ab3b88394df4d6 (patch) | |
| tree | 0b719c7bca96ee27b2f63bc1818171cba547e140 /drivers/gpu/drm/i915/intel_psr.c | |
| parent | 26f9ec9a9a4a2d97a86f6bd0084dcda4d88b89ef (diff) | |
| download | linux-b2fc2252ce41d004a23be7dd90ab3b88394df4d6.tar.xz | |
drm/i915/psr: Always wait for idle state when disabling PSR
It should always wait for idle state when disabling PSR because PSR
could be inactive due a call to intel_psr_exit() and while PSR is
still being disabled asynchronously userspace could change the
modeset causing a call to psr_disable() that will not wait for PSR
idle and then PSR will be enabled again while PSR is still not idle.
v2: rebased on top of the patch reusing psr_exit()
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181106190843.18009-2-jose.souza@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_psr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_psr.c | 41 |
1 files changed, 18 insertions, 23 deletions
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 2ecc2db67395..81ec31784766 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -661,8 +661,12 @@ static void intel_psr_exit(struct drm_i915_private *dev_priv) { u32 val; - if (!dev_priv->psr.active) + if (!dev_priv->psr.active) { + if (INTEL_GEN(dev_priv) >= 9) + WARN_ON(I915_READ(EDP_PSR2_CTL) & EDP_PSR2_ENABLE); + WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE); return; + } if (dev_priv->psr.psr2_enabled) { val = I915_READ(EDP_PSR2_CTL); @@ -680,32 +684,23 @@ static void intel_psr_disable_source(struct intel_dp *intel_dp) { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); + i915_reg_t psr_status; + u32 psr_status_mask; - if (dev_priv->psr.active) { - i915_reg_t psr_status; - u32 psr_status_mask; - - intel_psr_exit(dev_priv); + intel_psr_exit(dev_priv); - if (dev_priv->psr.psr2_enabled) { - psr_status = EDP_PSR2_STATUS; - psr_status_mask = EDP_PSR2_STATUS_STATE_MASK; - } else { - psr_status = EDP_PSR_STATUS; - psr_status_mask = EDP_PSR_STATUS_STATE_MASK; - } - - /* Wait till PSR is idle */ - if (intel_wait_for_register(dev_priv, - psr_status, psr_status_mask, 0, - 2000)) - DRM_ERROR("Timed out waiting for PSR Idle State\n"); + if (dev_priv->psr.psr2_enabled) { + psr_status = EDP_PSR2_STATUS; + psr_status_mask = EDP_PSR2_STATUS_STATE_MASK; } else { - if (dev_priv->psr.psr2_enabled) - WARN_ON(I915_READ(EDP_PSR2_CTL) & EDP_PSR2_ENABLE); - else - WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE); + psr_status = EDP_PSR_STATUS; + psr_status_mask = EDP_PSR_STATUS_STATE_MASK; } + + /* Wait till PSR is idle */ + if (intel_wait_for_register(dev_priv, psr_status, psr_status_mask, 0, + 2000)) + DRM_ERROR("Timed out waiting PSR idle state\n"); } static void intel_psr_disable_locked(struct intel_dp *intel_dp) |