drm/msm/mdp4: add lcdc-align-lsb flag to control lane alignment

index 9e08c2efa..c9e34501a 100644
@@ -377,20 +377,25 @@ static void mdp4_lcdc_encoder_enable(struct drm_encoder *encoder)
 	unsigned long pc = mdp4_lcdc_encoder->pixclock;
 	struct mdp4_kms *mdp4_kms = get_kms(encoder);
 	struct drm_panel *panel;
+	uint32_t config;
 	int i, ret;
 
 	if (WARN_ON(mdp4_lcdc_encoder->enabled))
 		return;
 
 	/* TODO: hard-coded for 18bpp: */
-	mdp4_crtc_set_config(encoder->crtc,
-			MDP4_DMA_CONFIG_R_BPC(BPC6) |
-			MDP4_DMA_CONFIG_G_BPC(BPC6) |
-			MDP4_DMA_CONFIG_B_BPC(BPC6) |
-			MDP4_DMA_CONFIG_PACK_ALIGN_MSB |
-			MDP4_DMA_CONFIG_PACK(0x21) |
-			MDP4_DMA_CONFIG_DEFLKR_EN |
-			MDP4_DMA_CONFIG_DITHER_EN);
+	config =
+		MDP4_DMA_CONFIG_R_BPC(BPC6) |
+		MDP4_DMA_CONFIG_G_BPC(BPC6) |
+		MDP4_DMA_CONFIG_B_BPC(BPC6) |
+		MDP4_DMA_CONFIG_PACK(0x21) |
+		MDP4_DMA_CONFIG_DEFLKR_EN |
+		MDP4_DMA_CONFIG_DITHER_EN;
+
+	if (!of_property_read_bool(dev->dev->of_node, "qcom,lcdc-align-lsb"))
+		config |= MDP4_DMA_CONFIG_PACK_ALIGN_MSB;
+
+	mdp4_crtc_set_config(encoder->crtc, config);
 	mdp4_crtc_set_intf(encoder->crtc, INTF_LCDC_DTV, 0);
 
 	bs_set(mdp4_lcdc_encoder, 1);

index adc442f73..99e363c3d 100644
@@ -271,7 +271,8 @@ static int find_chipid(struct device *dev, struct adreno_rev *rev)
 	if (ret == 0) {
 		unsigned int r, patch;
 
-		if (sscanf(compat, "qcom,adreno-%u.%u", &r, &patch) == 2) {
+		if (sscanf(compat, "qcom,adreno-%u.%u", &r, &patch) == 2 ||
+		    sscanf(compat, "amd,imageon-%u.%u", &r, &patch) == 2) {
 			rev->core = r / 100;
 			r %= 100;
 			rev->major = r / 10;

@@ -356,9 +357,37 @@ static const struct component_ops a3xx_ops = {
 		.unbind = adreno_unbind,
 };
 
+static void adreno_device_register_headless(void)
+{
+	/* on imx5, we don't have a top-level mdp/dpu node
+	 * this creates a dummy node for the driver for that case
+	 */
+	struct platform_device_info dummy_info = {
+		.parent = NULL,
+		.name = "msm",
+		.id = -1,
+		.res = NULL,
+		.num_res = 0,
+		.data = NULL,
+		.size_data = 0,
+		.dma_mask = ~0,
+	};
+	platform_device_register_full(&dummy_info);
+}
+
 static int adreno_probe(struct platform_device *pdev)
 {
-	return component_add(&pdev->dev, &a3xx_ops);
+
+	int ret;
+
+	ret = component_add(&pdev->dev, &a3xx_ops);
+	if (ret)
+		return ret;
+
+	if (of_device_is_compatible(pdev->dev.of_node, "amd,imageon"))
+		adreno_device_register_headless();
+
+	return 0;
 }
 
 static int adreno_remove(struct platform_device *pdev)

@@ -370,6 +399,8 @@ static int adreno_remove(struct platform_device *pdev)
 static const struct of_device_id dt_match[] = {
 	{ .compatible = "qcom,adreno" },
 	{ .compatible = "qcom,adreno-3xx" },
+	/* for compatibility with imx5 gpu: */
+	{ .compatible = "amd,imageon" },
 	/* for backwards compat w/ downstream kgsl DT files: */
 	{ .compatible = "qcom,kgsl-3d0" },
 	{}

index 9a7cf9fe2..fb423d309 100644
@@ -242,7 +242,7 @@ int msm_debugfs_init(struct drm_minor *minor)
 	debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root,
 		dev, &msm_gpu_fops);
 
-	if (priv->kms->funcs->debugfs_init) {
+	if (priv->kms && priv->kms->funcs->debugfs_init) {
 		ret = priv->kms->funcs->debugfs_init(priv->kms, minor);
 		if (ret)
 			return ret;

index 81bfac744..7842518a9 100644
@@ -510,17 +510,13 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 		priv->kms = kms;
 		break;
 	default:
-		kms = ERR_PTR(-ENODEV);
+		/* valid only for the dummy headless case, where of_node=NULL */
+		WARN_ON(dev->of_node);
+		kms = NULL;
 		break;
 	}
 
 	if (IS_ERR(kms)) {
-		/*
-		 * NOTE: once we have GPU support, having no kms should not
-		 * be considered fatal.. ideally we would still support gpu
-		 * and (for example) use dmabuf/prime to share buffers with
-		 * imx drm driver on iMX5
-		 */
 		DRM_DEV_ERROR(dev, "failed to load kms\n");
 		ret = PTR_ERR(kms);
 		priv->kms = NULL;

@@ -620,7 +616,7 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 	drm_mode_config_reset(ddev);
 
 #ifdef CONFIG_DRM_FBDEV_EMULATION
-	if (fbdev)
+	if (kms && fbdev)
 		priv->fbdev = msm_fbdev_init(ddev);
 #endif
 

@@ -1302,6 +1298,7 @@ static int add_display_components(struct device *dev,
 static const struct of_device_id msm_gpu_match[] = {
 	{ .compatible = "qcom,adreno" },
 	{ .compatible = "qcom,adreno-3xx" },
+	{ .compatible = "amd,imageon" },
 	{ .compatible = "qcom,kgsl-3d0" },
 	{ },
 };

@@ -1346,9 +1343,11 @@ static int msm_pdev_probe(struct platform_device *pdev)
 	struct component_match *match = NULL;
 	int ret;
 
-	ret = add_display_components(&pdev->dev, &match);
-	if (ret)
-		return ret;
+	if (get_mdp_ver(pdev)) {
+		ret = add_display_components(&pdev->dev, &match);
+		if (ret)
+			return ret;
+	}
 
 	ret = add_gpu_components(&pdev->dev, &match);
 	if (ret)

79 lines not on this page · raw message

index 99e363c3d..714ed6505 100644
@@ -308,6 +308,7 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
 	static struct adreno_platform_config config = {};
 	const struct adreno_info *info;
 	struct drm_device *drm = dev_get_drvdata(master);
+	struct msm_drm_private *priv = drm->dev_private;
 	struct msm_gpu *gpu;
 	int ret;
 

@@ -330,6 +331,8 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
 	DBG("Found GPU: %u.%u.%u.%u", config.rev.core, config.rev.major,
 		config.rev.minor, config.rev.patchid);
 
+	priv->is_a2xx = config.rev.core == 2;
+
 	gpu = info->init(drm);
 	if (IS_ERR(gpu)) {
 		dev_warn(drm->dev, "failed to load adreno gpu\n");

index 9ab67dd1b..2e4372ef1 100644
@@ -769,6 +769,9 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 
 	adreno_gpu_config.va_start = SZ_16M;
 	adreno_gpu_config.va_end = 0xffffffff;
+	/* maximum range of a2xx mmu */
+	if (adreno_is_a2xx(adreno_gpu))
+		adreno_gpu_config.va_end = SZ_16M + 0xfff * SZ_64K;
 
 	adreno_gpu_config.nr_rings = nr_rings;
 

index 7842518a9..271f1df61 100644
@@ -26,6 +26,7 @@
 #include "msm_gem.h"
 #include "msm_gpu.h"
 #include "msm_kms.h"
+#include "adreno/adreno_gpu.h"
 
 
 /*

@@ -360,6 +361,14 @@ static int get_mdp_ver(struct platform_device *pdev)
 
 #include <linux/of_address.h>
 
+bool msm_use_mmu(struct drm_device *dev)
+{
+	struct msm_drm_private *priv = dev->dev_private;
+
+	/* a2xx comes with its own MMU */
+	return priv->is_a2xx || iommu_present(&platform_bus_type);
+}
+
 static int msm_init_vram(struct drm_device *dev)
 {
 	struct msm_drm_private *priv = dev->dev_private;

@@ -398,7 +407,7 @@ static int msm_init_vram(struct drm_device *dev)
 		 * Grab the entire CMA chunk carved out in early startup in
 		 * mach-msm:
 		 */
-	} else if (!iommu_present(&platform_bus_type)) {
+	} else if (!msm_use_mmu(dev)) {
 		DRM_INFO("using %s VRAM carveout\n", vram);
 		size = memparse(vram, NULL);
 	}

index 71a03ce21..9cd6a96c6 100644
@@ -179,6 +179,8 @@ struct msm_drm_private {
 	/* when we have more than one 'msm_gpu' these need to be an array: */
 	struct msm_gpu *gpu;
 	struct msm_file_private *lastctx;
+	/* gpu is only set on open(), but we need this info earlier */
+	bool is_a2xx;
 
 	struct drm_fb_helper *fbdev;
 

@@ -258,9 +260,15 @@ struct msm_gem_address_space *
 msm_gem_address_space_create(struct device *dev, struct iommu_domain *domain,
 		const char *name);
 
+struct msm_gem_address_space *
+msm_gem_address_space_create_a2xx(struct device *dev, struct msm_gpu *gpu,
+		const char *name, uint64_t va_start, uint64_t va_end);
+
 int msm_register_mmu(struct drm_device *dev, struct msm_mmu *mmu);
 void msm_unregister_mmu(struct drm_device *dev, struct msm_mmu *mmu);
 
+bool msm_use_mmu(struct drm_device *dev);
+
 void msm_gem_submit_free(struct msm_gem_submit *submit);
 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 		struct drm_file *file);

index 38b7f4e9e..51a95da69 100644
@@ -975,7 +975,7 @@ static struct drm_gem_object *_msm_gem_new(struct drm_device *dev,
 
 	size = PAGE_ALIGN(size);
 
-	if (!iommu_present(&platform_bus_type))
+	if (!msm_use_mmu(dev))
 		use_vram = true;
 	else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && priv->vram.size)
 		use_vram = true;

@@ -1052,7 +1052,7 @@ struct drm_gem_object *msm_gem_import(struct drm_device *dev,
 	int ret, npages;
 
 	/* if we don't have IOMMU, don't bother pretending we can import: */
-	if (!iommu_present(&platform_bus_type)) {
+	if (!msm_use_mmu(dev)) {
 		DRM_DEV_ERROR(dev->dev, "cannot import without IOMMU\n");
 		return ERR_PTR(-EINVAL);
 	}

index ee46d8321..557360788 100644
@@ -159,3 +159,26 @@ msm_gem_address_space_create(struct device *dev, struct iommu_domain *domain,
 
 	return aspace;
 }
+
+struct msm_gem_address_space *
+msm_gem_address_space_create_a2xx(struct device *dev, struct msm_gpu *gpu,
+		const char *name, uint64_t va_start, uint64_t va_end)
+{
+	struct msm_gem_address_space *aspace;
+	u64 size = va_end - va_start;
+
+	aspace = kzalloc(sizeof(*aspace), GFP_KERNEL);
+	if (!aspace)
+		return ERR_PTR(-ENOMEM);
+
+	spin_lock_init(&aspace->lock);
+	aspace->name = name;
+	aspace->mmu = msm_gpummu_new(dev, gpu);
+
+	drm_mm_init(&aspace->mm, (va_start >> PAGE_SHIFT),
+		size >> PAGE_SHIFT);
+
+	kref_init(&aspace->kref);
+
+	return aspace;
+}

index c1968d63b..5f3eff304 100644
@@ -20,6 +20,7 @@
 #include "msm_mmu.h"
 #include "msm_fence.h"
 #include "msm_gpu_trace.h"
+#include "adreno/adreno_gpu.h"
 
 #include <generated/utsrelease.h>
 #include <linux/string_helpers.h>

@@ -825,7 +826,6 @@ static struct msm_gem_address_space *
 msm_gpu_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev,
 		uint64_t va_start, uint64_t va_end)
 {
-	struct iommu_domain *iommu;
 	struct msm_gem_address_space *aspace;
 	int ret;
 

@@ -834,20 +834,27 @@ msm_gpu_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev,
 	 * and have separate page tables per context.  For now, to keep things
 	 * simple and to get something working, just use a single address space:
 	 */
-	iommu = iommu_domain_alloc(&platform_bus_type);
-	if (!iommu)
-		return NULL;
-
-	iommu->geometry.aperture_start = va_start;
-	iommu->geometry.aperture_end = va_end;
-
-	DRM_DEV_INFO(gpu->dev->dev, "%s: using IOMMU\n", gpu->name);
+	if (!adreno_is_a2xx(to_adreno_gpu(gpu))) {
+		struct iommu_domain *iommu = iommu_domain_alloc(&platform_bus_type);
+		if (!iommu)
+			return NULL;
+
+		iommu->geometry.aperture_start = va_start;
+		iommu->geometry.aperture_end = va_end;
+
+		DRM_DEV_INFO(gpu->dev->dev, "%s: using IOMMU\n", gpu->name);
+
+		aspace = msm_gem_address_space_create(&pdev->dev, iommu, "gpu");
+		if (IS_ERR(aspace))
+			iommu_domain_free(iommu);
+	} else {
+		aspace = msm_gem_address_space_create_a2xx(&pdev->dev, gpu, "gpu",
+			va_start, va_end);
+	}
 
-	aspace = msm_gem_address_space_create(&pdev->dev, iommu, "gpu");
 	if (IS_ERR(aspace)) {
-		DRM_DEV_ERROR(gpu->dev->dev, "failed to init iommu: %ld\n",
+		DRM_DEV_ERROR(gpu->dev->dev, "failed to init mmu: %ld\n",
 			PTR_ERR(aspace));
-		iommu_domain_free(iommu);
 		return ERR_CAST(aspace);
 	}
 

122 lines not on this page · raw message

index 94c0b83d8..d21b26604 100644
@@ -53,4 +53,7 @@ static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg,
 	mmu->handler = handler;
 }
 
+void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
+		dma_addr_t *tran_error);
+
 #endif /* __MSM_MMU_H__ */