[PATCH v3 2/5] drm/msm/mdp5: move iommu_domain_alloc() call close to its usage

From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Stephen Boyd <swboyd@chromium.org>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org
Subject: [PATCH v3 2/5] drm/msm/mdp5: move iommu_domain_alloc() call close to its usage
Date: Thu, 16 Jun 2022 11:11:03 +0300	[thread overview]
Message-ID: <20220616081106.350262-3-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20220616081106.350262-1-dmitry.baryshkov@linaro.org>

Move iommu_domain_alloc() in front of adress space/IOMMU initialization.
This allows us to drop final bits of struct mdp5_cfg_platform which
remained from the pre-DT days.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c | 16 ----------------
 drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.h |  6 ------
 drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c |  6 ++++--
 3 files changed, 4 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c
index 1bf9ff5dbabc..714effb967ff 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c
@@ -1248,8 +1248,6 @@ static const struct mdp5_cfg_handler cfg_handlers_v3[] = {
 	{ .revision = 3, .config = { .hw = &sdm630_config } },
 };
 
-static struct mdp5_cfg_platform *mdp5_get_config(struct platform_device *dev);
-
 const struct mdp5_cfg_hw *mdp5_cfg_get_hw_config(struct mdp5_cfg_handler *cfg_handler)
 {
 	return cfg_handler->config.hw;
@@ -1274,10 +1272,8 @@ struct mdp5_cfg_handler *mdp5_cfg_init(struct mdp5_kms *mdp5_kms,
 		uint32_t major, uint32_t minor)
 {
 	struct drm_device *dev = mdp5_kms->dev;
-	struct platform_device *pdev = to_platform_device(dev->dev);
 	struct mdp5_cfg_handler *cfg_handler;
 	const struct mdp5_cfg_handler *cfg_handlers;
-	struct mdp5_cfg_platform *pconfig;
 	int i, ret = 0, num_handlers;
 
 	cfg_handler = kzalloc(sizeof(*cfg_handler), GFP_KERNEL);
@@ -1320,9 +1316,6 @@ struct mdp5_cfg_handler *mdp5_cfg_init(struct mdp5_kms *mdp5_kms,
 	cfg_handler->revision = minor;
 	cfg_handler->config.hw = mdp5_cfg;
 
-	pconfig = mdp5_get_config(pdev);
-	memcpy(&cfg_handler->config.platform, pconfig, sizeof(*pconfig));
-
 	DBG("MDP5: %s hw config selected", mdp5_cfg->name);
 
 	return cfg_handler;
@@ -1333,12 +1326,3 @@ struct mdp5_cfg_handler *mdp5_cfg_init(struct mdp5_kms *mdp5_kms,
 
 	return ERR_PTR(ret);
 }
-
-static struct mdp5_cfg_platform *mdp5_get_config(struct platform_device *dev)
-{
-	static struct mdp5_cfg_platform config = {};
-
-	config.iommu = iommu_domain_alloc(&platform_bus_type);
-
-	return &config;
-}
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.h b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.h
index 6b03d7899309..c2502cc33864 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.h
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.h
@@ -104,14 +104,8 @@ struct mdp5_cfg_hw {
 	uint32_t max_clk;
 };
 
-/* platform config data (ie. from DT, or pdata) */
-struct mdp5_cfg_platform {
-	struct iommu_domain *iommu;
-};
-
 struct mdp5_cfg {
 	const struct mdp5_cfg_hw *hw;
-	struct mdp5_cfg_platform platform;
 };
 
 struct mdp5_kms;
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 3d5621a68f85..a69e23f10d91 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -558,6 +558,7 @@ static int mdp5_kms_init(struct drm_device *dev)
 	struct msm_gem_address_space *aspace;
 	int irq, i, ret;
 	struct device *iommu_dev;
+	struct iommu_domain *iommu;
 
 	ret = mdp5_init(to_platform_device(dev->dev), dev);
 
@@ -601,14 +602,15 @@ static int mdp5_kms_init(struct drm_device *dev)
 	}
 	mdelay(16);
 
-	if (config->platform.iommu) {
+	iommu = iommu_domain_alloc(&platform_bus_type);
+	if (iommu) {
 		struct msm_mmu *mmu;
 
 		iommu_dev = &pdev->dev;
 		if (!dev_iommu_fwspec_get(iommu_dev))
 			iommu_dev = iommu_dev->parent;
 
-		mmu = msm_iommu_new(iommu_dev, config->platform.iommu);
+		mmu = msm_iommu_new(iommu_dev, iommu);
 
 		aspace = msm_gem_address_space_create(mmu, "mdp5",
 			0x1000, 0x100000000 - 0x1000);
-- 
2.35.1

