Intel-GFX Archive on lore.kernel.org
 help / color / mirror / Atom feed
From: "José Roberto de Souza" <jose.souza@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>
Subject: [PATCH v4 2/4] drm/i915/psr: Always wait for idle state when disabling PSR
Date: Tue,  6 Nov 2018 11:08:41 -0800	[thread overview]
Message-ID: <20181106190843.18009-2-jose.souza@intel.com> (raw)
In-Reply-To: <20181106190843.18009-1-jose.souza@intel.com>

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>
---
 drivers/gpu/drm/i915/intel_psr.c | 41 ++++++++++++++------------------
 1 file 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)
-- 
2.19.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

  reply	other threads:[~2018-11-06 19:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-06 19:08 [PATCH v4 1/4] drm/i915/psr: Use intel_psr_exit() in intel_psr_disable_source() José Roberto de Souza
2018-11-06 19:08 ` José Roberto de Souza [this message]
2018-11-06 19:08 ` [PATCH v4 3/4] drm/i915/icl: Reset PSR interruptions José Roberto de Souza
2018-11-06 19:08 ` [PATCH v4 4/4] drm/i915/psr: Move intel_psr_disable_source() code to intel_psr_disable_locked() José Roberto de Souza
2018-11-07 13:00 ` ✓ Fi.CI.BAT: success for series starting with [v4,1/4] drm/i915/psr: Use intel_psr_exit() in intel_psr_disable_source() Patchwork
2018-11-08  1:13 ` ✗ Fi.CI.BAT: failure " Patchwork
2018-11-08  2:13 ` ✓ Fi.CI.BAT: success " Patchwork
2018-11-08 21:02 ` Patchwork
2018-11-09  6:36 ` ✓ Fi.CI.IGT: " Patchwork
2018-11-09 18:53   ` Souza, Jose

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20181106190843.18009-2-jose.souza@intel.com \
    --to=jose.souza@intel.com \
    --cc=dhinakaran.pandiyan@intel.com \
    --cc=intel-gfx@lists.freedesktop.org \
    --cc=rodrigo.vivi@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox