diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0743-drm-vc4-Adopt-the-dma-configuration-from-the-HVS-or-.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0743-drm-vc4-Adopt-the-dma-configuration-from-the-HVS-or-.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0743-drm-vc4-Adopt-the-dma-configuration-from-the-HVS-or-.patch b/target/linux/bcm27xx/patches-5.4/950-0743-drm-vc4-Adopt-the-dma-configuration-from-the-HVS-or-.patch new file mode 100644 index 0000000000..2c9449df0f --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0743-drm-vc4-Adopt-the-dma-configuration-from-the-HVS-or-.patch @@ -0,0 +1,54 @@ +From 13c11f40ded81f258178936e9fa22788e59b82cf Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Tue, 19 May 2020 14:54:28 +0100 +Subject: [PATCH] drm/vc4: Adopt the dma configuration from the HVS or + V3D component + +vc4_drv isn't necessarily under the /soc node in DT as it is a +virtual device, but it is the one that does the allocations. +The DMA addresses are consumed by primarily the HVS or V3D, and +those require VideoCore cache alias address mapping, and so will be +under /soc. + +During probe find the a suitable device node for HVS or V3D, +and adopt the DMA configuration of that node. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +--- + drivers/gpu/drm/vc4/vc4_drv.c | 18 ++++++++++++++++++ + 1 file changed, 18 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_drv.c ++++ b/drivers/gpu/drm/vc4/vc4_drv.c +@@ -249,6 +249,14 @@ static void vc4_match_add_drivers(struct + } + } + ++const struct of_device_id vc4_dma_range_matches[] = { ++ { .compatible = "brcm,bcm2835-hvs" }, ++ { .compatible = "brcm,bcm2835-v3d" }, ++ { .compatible = "brcm,cygnus-v3d" }, ++ { .compatible = "brcm,vc4-v3d" }, ++ {} ++}; ++ + static int vc4_drm_bind(struct device *dev) + { + struct platform_device *pdev = to_platform_device(dev); +@@ -269,6 +277,16 @@ static int vc4_drm_bind(struct device *d + vc4_drm_driver.driver_features &= ~DRIVER_RENDER; + of_node_put(node); + ++ node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches, ++ NULL); ++ if (node) { ++ ret = of_dma_configure(dev, node, true); ++ of_node_put(node); ++ ++ if (ret) ++ return ret; ++ } ++ + drm = drm_dev_alloc(&vc4_drm_driver, dev); + if (IS_ERR(drm)) + return PTR_ERR(drm); |