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[73.241.2.21]) by smtp.googlemail.com with ESMTPSA id wp4sm39906381pab.15.2016.07.31.12.42.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 31 Jul 2016 12:42:46 -0700 (PDT) From: Steve Longerbeam X-Google-Original-From: Steve Longerbeam To: p.zabel@pengutronix.de, plagnioj@jcrosoft.com, tomi.valkeinen@ti.com Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, Steve Longerbeam Subject: [PATCH v3 07/12] gpu: ipu-v3: Fix IRT usage Date: Sun, 31 Jul 2016 12:42:22 -0700 Message-Id: <1469994147-17549-8-git-send-email-steve_longerbeam@mentor.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1469994147-17549-1-git-send-email-steve_longerbeam@mentor.com> References: <1469994147-17549-1-git-send-email-steve_longerbeam@mentor.com> Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There can be multiple IC tasks using the IRT, so the IRT needs a separate use counter. Create a private ipu_irt_enable() to enable the IRT module when any IC task requires rotation, and ipu_irt_disable() when a task no longer needs the IRT. Signed-off-by: Steve Longerbeam --- v3: no changes v2: - cleaned up irt_use_count decrement in ipu_irt_disable() --- drivers/gpu/ipu-v3/ipu-ic.c | 40 +++++++++++++++++++++++++++++++--------- 1 file changed, 31 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/ipu-v3/ipu-ic.c b/drivers/gpu/ipu-v3/ipu-ic.c index 1dcb96c..1a37afc 100644 --- a/drivers/gpu/ipu-v3/ipu-ic.c +++ b/drivers/gpu/ipu-v3/ipu-ic.c @@ -160,6 +160,7 @@ struct ipu_ic_priv { spinlock_t lock; struct ipu_soc *ipu; int use_count; + int irt_use_count; struct ipu_ic task[IC_NUM_TASKS]; }; @@ -379,8 +380,6 @@ void ipu_ic_task_disable(struct ipu_ic *ic) ipu_ic_write(ic, ic_conf, IC_CONF); - ic->rotation = ic->graphics = false; - spin_unlock_irqrestore(&priv->lock, flags); } EXPORT_SYMBOL_GPL(ipu_ic_task_disable); @@ -629,22 +628,41 @@ unlock: } EXPORT_SYMBOL_GPL(ipu_ic_task_idma_init); +static void ipu_irt_enable(struct ipu_ic *ic) +{ + struct ipu_ic_priv *priv = ic->priv; + + if (!priv->irt_use_count) + ipu_module_enable(priv->ipu, IPU_CONF_ROT_EN); + + priv->irt_use_count++; +} + +static void ipu_irt_disable(struct ipu_ic *ic) +{ + struct ipu_ic_priv *priv = ic->priv; + + if (priv->irt_use_count) { + if (!--priv->irt_use_count) + ipu_module_disable(priv->ipu, IPU_CONF_ROT_EN); + } +} + int ipu_ic_enable(struct ipu_ic *ic) { struct ipu_ic_priv *priv = ic->priv; unsigned long flags; - u32 module = IPU_CONF_IC_EN; spin_lock_irqsave(&priv->lock, flags); - if (ic->rotation) - module |= IPU_CONF_ROT_EN; - if (!priv->use_count) - ipu_module_enable(priv->ipu, module); + ipu_module_enable(priv->ipu, IPU_CONF_IC_EN); priv->use_count++; + if (ic->rotation) + ipu_irt_enable(ic); + spin_unlock_irqrestore(&priv->lock, flags); return 0; @@ -655,18 +673,22 @@ int ipu_ic_disable(struct ipu_ic *ic) { struct ipu_ic_priv *priv = ic->priv; unsigned long flags; - u32 module = IPU_CONF_IC_EN | IPU_CONF_ROT_EN; spin_lock_irqsave(&priv->lock, flags); priv->use_count--; if (!priv->use_count) - ipu_module_disable(priv->ipu, module); + ipu_module_disable(priv->ipu, IPU_CONF_IC_EN); if (priv->use_count < 0) priv->use_count = 0; + if (ic->rotation) + ipu_irt_disable(ic); + + ic->rotation = ic->graphics = false; + spin_unlock_irqrestore(&priv->lock, flags); return 0;