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d="scan'208";a="549279891" Received: from ideak-desk.fi.intel.com ([10.237.68.141]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Nov 2020 14:07:20 -0800 Date: Tue, 1 Dec 2020 00:07:16 +0200 From: Imre Deak To: Chris Wilson Message-ID: <20201130220716.GC2480925@ideak-desk.fi.intel.com> References: <20201130212200.2811939-1-imre.deak@intel.com> <20201130212200.2811939-5-imre.deak@intel.com> <160677363371.12351.7483170084025008582@build.alporthouse.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <160677363371.12351.7483170084025008582@build.alporthouse.com> Subject: Re: [Intel-gfx] [PATCH 4/9] drm/i915/ddi: Track power reference taken for encoder DDI IO use X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: imre.deak@intel.com Cc: intel-gfx@lists.freedesktop.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Mon, Nov 30, 2020 at 10:00:33PM +0000, Chris Wilson wrote: > Quoting Imre Deak (2020-11-30 21:21:55) > > Add wakeref tracking for the DDI encoders' DDI_IO display power domain > > references. > > > > Cc: Chris Wilson > > Signed-off-by: Imre Deak > > --- > > drivers/gpu/drm/i915/display/intel_ddi.c | 38 ++++++++++++------- > > .../drm/i915/display/intel_display_types.h | 1 + > > 2 files changed, 25 insertions(+), 14 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c > > index 92940a0c5ef8..9518d298b0f7 100644 > > --- a/drivers/gpu/drm/i915/display/intel_ddi.c > > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c > > @@ -2285,9 +2285,11 @@ static void intel_ddi_get_power_domains(struct intel_encoder *encoder, > > dig_port = enc_to_dig_port(encoder); > > > > if (!intel_phy_is_tc(dev_priv, phy) || > > - dig_port->tc_mode != TC_PORT_TBT_ALT) > > - intel_display_power_get(dev_priv, > > - dig_port->ddi_io_power_domain); > > + dig_port->tc_mode != TC_PORT_TBT_ALT) { > > + drm_WARN_ON(&dev_priv->drm, dig_port->ddi_io_wakeref); > > + dig_port->ddi_io_wakeref = intel_display_power_get(dev_priv, > > + dig_port->ddi_io_power_domain); > > + } > > > @@ -3958,8 +3967,9 @@ static void intel_ddi_post_disable_hdmi(struct intel_atomic_state *state, > > > > intel_disable_ddi_buf(encoder, old_crtc_state); > > > > - intel_display_power_put_unchecked(dev_priv, > > - dig_port->ddi_io_power_domain); > > + intel_display_power_put(dev_priv, > > + dig_port->ddi_io_power_domain, > > + fetch_and_zero(&dig_port->ddi_io_wakeref)); > > I remember that once we had trouble with this being a macro and not > evaluating the fetch_and_zero() when used as an argument. > > Looks like we still have the same trouble with > > #if !IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM) > static inline void > intel_display_power_put(struct drm_i915_private *i915, > enum intel_display_power_domain domain, > intel_wakeref_t wakeref) > { > intel_display_power_put_unchecked(i915, domain); > } > #endif > > will cause the ddi_io_wakeref to not be cleared, and the warn on to be > hit in non-debug builds. Arg, screwed it again. > -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx