diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0578-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0578-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0578-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch b/target/linux/brcm2708/patches-4.19/950-0578-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch new file mode 100644 index 0000000000..863cba6463 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0578-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch @@ -0,0 +1,167 @@ +From ef816cd2c04e82d3b923cbb407025609fecd1205 Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Wed, 20 Feb 2019 13:03:41 -0800 +Subject: [PATCH 578/725] drm/vc4: Disable V3D interactions if the v3d + component didn't probe. + +One might want to use the VC4 display stack without using Mesa. +Similar to the debugfs fixes for not having all of the possible +display bits enabled, make sure you can't oops in vc4 if v3d isn't +enabled. + +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + drivers/gpu/drm/vc4/vc4_drv.c | 11 +++++++++++ + drivers/gpu/drm/vc4/vc4_gem.c | 10 ++++++++++ + drivers/gpu/drm/vc4/vc4_irq.c | 9 +++++++++ + drivers/gpu/drm/vc4/vc4_perfmon.c | 18 ++++++++++++++++++ + 4 files changed, 48 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_drv.c ++++ b/drivers/gpu/drm/vc4/vc4_drv.c +@@ -71,6 +71,9 @@ static int vc4_get_param_ioctl(struct dr + if (args->pad != 0) + return -EINVAL; + ++ if (!vc4->v3d) ++ return -EINVAL; ++ + switch (args->param) { + case DRM_VC4_PARAM_V3D_IDENT0: + ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); +@@ -271,6 +274,7 @@ static int vc4_drm_bind(struct device *d + struct platform_device *pdev = to_platform_device(dev); + struct drm_device *drm; + struct vc4_dev *vc4; ++ struct device_node *node; + int ret = 0; + + dev->coherent_dma_mask = DMA_BIT_MASK(32); +@@ -279,6 +283,13 @@ static int vc4_drm_bind(struct device *d + if (!vc4) + return -ENOMEM; + ++ /* If VC4 V3D is missing, don't advertise render nodes. */ ++ node = of_find_compatible_node(NULL, NULL, "brcm,bcm2835-v3d"); ++ if (node) ++ of_node_put(node); ++ else ++ vc4_drm_driver.driver_features &= ~DRIVER_RENDER; ++ + drm = drm_dev_alloc(&vc4_drm_driver, dev); + if (IS_ERR(drm)) + return PTR_ERR(drm); +--- a/drivers/gpu/drm/vc4/vc4_gem.c ++++ b/drivers/gpu/drm/vc4/vc4_gem.c +@@ -74,6 +74,11 @@ vc4_get_hang_state_ioctl(struct drm_devi + u32 i; + int ret = 0; + ++ if (!vc4->v3d) { ++ DRM_DEBUG("VC4_GET_HANG_STATE with no VC4 V3D probed\n"); ++ return -EINVAL; ++ } ++ + spin_lock_irqsave(&vc4->job_lock, irqflags); + kernel_state = vc4->hang_state; + if (!kernel_state) { +@@ -1124,6 +1129,11 @@ vc4_submit_cl_ioctl(struct drm_device *d + struct dma_fence *in_fence; + int ret = 0; + ++ if (!vc4->v3d) { ++ DRM_DEBUG("VC4_SUBMIT_CL with no VC4 V3D probed\n"); ++ return -EINVAL; ++ } ++ + if ((args->flags & ~(VC4_SUBMIT_CL_USE_CLEAR_COLOR | + VC4_SUBMIT_CL_FIXED_RCL_ORDER | + VC4_SUBMIT_CL_RCL_ORDER_INCREASING_X | +--- a/drivers/gpu/drm/vc4/vc4_irq.c ++++ b/drivers/gpu/drm/vc4/vc4_irq.c +@@ -229,6 +229,9 @@ vc4_irq_preinstall(struct drm_device *de + { + struct vc4_dev *vc4 = to_vc4_dev(dev); + ++ if (!vc4->v3d) ++ return; ++ + init_waitqueue_head(&vc4->job_wait_queue); + INIT_WORK(&vc4->overflow_mem_work, vc4_overflow_mem_work); + +@@ -243,6 +246,9 @@ vc4_irq_postinstall(struct drm_device *d + { + struct vc4_dev *vc4 = to_vc4_dev(dev); + ++ if (!vc4->v3d) ++ return 0; ++ + /* Enable both the render done and out of memory interrupts. */ + V3D_WRITE(V3D_INTENA, V3D_DRIVER_IRQS); + +@@ -254,6 +260,9 @@ vc4_irq_uninstall(struct drm_device *dev + { + struct vc4_dev *vc4 = to_vc4_dev(dev); + ++ if (!vc4->v3d) ++ return; ++ + /* Disable sending interrupts for our driver's IRQs. */ + V3D_WRITE(V3D_INTDIS, V3D_DRIVER_IRQS); + +--- a/drivers/gpu/drm/vc4/vc4_perfmon.c ++++ b/drivers/gpu/drm/vc4/vc4_perfmon.c +@@ -100,12 +100,18 @@ void vc4_perfmon_close_file(struct vc4_f + int vc4_perfmon_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) + { ++ struct vc4_dev *vc4 = to_vc4_dev(dev); + struct vc4_file *vc4file = file_priv->driver_priv; + struct drm_vc4_perfmon_create *req = data; + struct vc4_perfmon *perfmon; + unsigned int i; + int ret; + ++ if (!vc4->v3d) { ++ DRM_DEBUG("Creating perfmon no VC4 V3D probed\n"); ++ return -EINVAL; ++ } ++ + /* Number of monitored counters cannot exceed HW limits. */ + if (req->ncounters > DRM_VC4_MAX_PERF_COUNTERS || + !req->ncounters) +@@ -146,10 +152,16 @@ int vc4_perfmon_create_ioctl(struct drm_ + int vc4_perfmon_destroy_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) + { ++ struct vc4_dev *vc4 = to_vc4_dev(dev); + struct vc4_file *vc4file = file_priv->driver_priv; + struct drm_vc4_perfmon_destroy *req = data; + struct vc4_perfmon *perfmon; + ++ if (!vc4->v3d) { ++ DRM_DEBUG("Destroying perfmon no VC4 V3D probed\n"); ++ return -EINVAL; ++ } ++ + mutex_lock(&vc4file->perfmon.lock); + perfmon = idr_remove(&vc4file->perfmon.idr, req->id); + mutex_unlock(&vc4file->perfmon.lock); +@@ -164,11 +176,17 @@ int vc4_perfmon_destroy_ioctl(struct drm + int vc4_perfmon_get_values_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) + { ++ struct vc4_dev *vc4 = to_vc4_dev(dev); + struct vc4_file *vc4file = file_priv->driver_priv; + struct drm_vc4_perfmon_get_values *req = data; + struct vc4_perfmon *perfmon; + int ret; + ++ if (!vc4->v3d) { ++ DRM_DEBUG("Getting perfmon no VC4 V3D probed\n"); ++ return -EINVAL; ++ } ++ + mutex_lock(&vc4file->perfmon.lock); + perfmon = idr_find(&vc4file->perfmon.idr, req->id); + vc4_perfmon_get(perfmon); |