diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0776-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0776-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0776-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch b/target/linux/bcm27xx/patches-4.19/950-0776-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch new file mode 100644 index 0000000000..afc94da40b --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0776-drm-vc4-Disable-V3D-interactions-if-the-v3d-componen.patch @@ -0,0 +1,197 @@ +From 7140cf0d83c10f93ca8212edb17697baf9cafb45 Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Mon, 1 Apr 2019 11:35:59 -0700 +Subject: [PATCH] drm/vc4: Disable V3D interactions if the v3d + component didn't probe. + +Commit ffc26740714962e3e8801dca7ef32b636b3781db upstream. + +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. + +v2: Fix matching against other v3d variants (review by Paul), don't + forget to set irq_enabled so that the vblank uapi works +v3: Use -ENODEV instead of -EINVAL on Paul's suggestion. + +Signed-off-by: Eric Anholt <eric@anholt.net> +Link: https://patchwork.freedesktop.org/patch/msgid/20190401183559.3823-2-eric@anholt.net +Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> +--- + drivers/gpu/drm/vc4/vc4_drv.c | 10 ++++++++++ + drivers/gpu/drm/vc4/vc4_drv.h | 1 + + drivers/gpu/drm/vc4/vc4_gem.c | 10 ++++++++++ + drivers/gpu/drm/vc4/vc4_irq.c | 9 +++++++++ + drivers/gpu/drm/vc4/vc4_perfmon.c | 18 ++++++++++++++++++ + drivers/gpu/drm/vc4/vc4_v3d.c | 2 +- + 6 files changed, 49 insertions(+), 1 deletion(-) + +--- 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 -ENODEV; ++ + 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 +283,12 @@ 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_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL); ++ if (!node || !of_device_is_available(node)) ++ vc4_drm_driver.driver_features &= ~DRIVER_RENDER; ++ of_node_put(node); ++ + drm = drm_dev_alloc(&vc4_drm_driver, dev); + if (IS_ERR(drm)) + return PTR_ERR(drm); +--- a/drivers/gpu/drm/vc4/vc4_drv.h ++++ b/drivers/gpu/drm/vc4/vc4_drv.h +@@ -787,6 +787,7 @@ void vc4_plane_async_set_fb(struct drm_p + + /* vc4_v3d.c */ + extern struct platform_driver vc4_v3d_driver; ++extern const struct of_device_id vc4_v3d_dt_match[]; + int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused); + int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused); + int vc4_v3d_get_bin_slot(struct vc4_dev *vc4); +--- 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 -ENODEV; ++ } ++ + 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 -ENODEV; ++ } ++ + 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 -ENODEV; ++ } ++ + /* 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 -ENODEV; ++ } ++ + 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 -ENODEV; ++ } ++ + mutex_lock(&vc4file->perfmon.lock); + perfmon = idr_find(&vc4file->perfmon.idr, req->id); + vc4_perfmon_get(perfmon); +--- a/drivers/gpu/drm/vc4/vc4_v3d.c ++++ b/drivers/gpu/drm/vc4/vc4_v3d.c +@@ -452,7 +452,7 @@ static int vc4_v3d_dev_remove(struct pla + return 0; + } + +-static const struct of_device_id vc4_v3d_dt_match[] = { ++const struct of_device_id vc4_v3d_dt_match[] = { + { .compatible = "brcm,bcm2835-v3d" }, + { .compatible = "brcm,cygnus-v3d" }, + { .compatible = "brcm,vc4-v3d" }, |