diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0475-drm-vc4-Add-a-getparam-ioctl-for-getting-the-V3D-ide.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0475-drm-vc4-Add-a-getparam-ioctl-for-getting-the-V3D-ide.patch | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0475-drm-vc4-Add-a-getparam-ioctl-for-getting-the-V3D-ide.patch b/target/linux/brcm2708/patches-4.4/0475-drm-vc4-Add-a-getparam-ioctl-for-getting-the-V3D-ide.patch new file mode 100644 index 0000000000..41459dabec --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0475-drm-vc4-Add-a-getparam-ioctl-for-getting-the-V3D-ide.patch @@ -0,0 +1,124 @@ +From 03f4e4a6e625306671266db609b4f4d488b6cf6d Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Fri, 1 Jul 2016 13:10:38 -0700 +Subject: [PATCH] drm/vc4: Add a getparam ioctl for getting the V3D identity + regs. + +As I extend the driver to support different V3D revisions, userspace +needs to know what version it's targeting. This is most easily +detected using the V3D identity registers. + +v2: Make sure V3D is runtime PM on when reading the registers. +v3: Switch to a 64-bit param value (suggested by Rob Clark in review) + +Signed-off-by: Eric Anholt <eric@anholt.net> +Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v2) +Reviewed-by: Rob Clark <robdclark@gmail.com> (v3, over irc) +(cherry picked from commit af713795c59fea36161a7debf97dbc10bf652cf7) + +v4: Squashed in "drm/vc4: Fix handling of a pm_runtime_get_sync() success case." +--- + drivers/gpu/drm/vc4/vc4_drv.c | 42 ++++++++++++++++++++++++++++++++++++++++++ + include/uapi/drm/vc4_drm.h | 12 ++++++++++++ + 2 files changed, 54 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_drv.c ++++ b/drivers/gpu/drm/vc4/vc4_drv.c +@@ -15,6 +15,7 @@ + #include <linux/module.h> + #include <linux/of_platform.h> + #include <linux/platform_device.h> ++#include <linux/pm_runtime.h> + #include "drm_fb_cma_helper.h" + + #include "uapi/drm/vc4_drm.h" +@@ -64,6 +65,46 @@ void vc4_dump_regs32(const struct debugf + } + } + ++static int vc4_get_param_ioctl(struct drm_device *dev, void *data, ++ struct drm_file *file_priv) ++{ ++ struct vc4_dev *vc4 = to_vc4_dev(dev); ++ struct drm_vc4_get_param *args = data; ++ int ret; ++ ++ if (args->pad != 0) ++ return -EINVAL; ++ ++ switch (args->param) { ++ case DRM_VC4_PARAM_V3D_IDENT0: ++ ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); ++ if (ret < 0) ++ return ret; ++ args->value = V3D_READ(V3D_IDENT0); ++ pm_runtime_put(&vc4->v3d->pdev->dev); ++ break; ++ case DRM_VC4_PARAM_V3D_IDENT1: ++ ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); ++ if (ret < 0) ++ return ret; ++ args->value = V3D_READ(V3D_IDENT1); ++ pm_runtime_put(&vc4->v3d->pdev->dev); ++ break; ++ case DRM_VC4_PARAM_V3D_IDENT2: ++ ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); ++ if (ret < 0) ++ return ret; ++ args->value = V3D_READ(V3D_IDENT2); ++ pm_runtime_put(&vc4->v3d->pdev->dev); ++ break; ++ default: ++ DRM_DEBUG("Unknown parameter %d\n", args->param); ++ return -EINVAL; ++ } ++ ++ return 0; ++} ++ + static void vc4_lastclose(struct drm_device *dev) + { + struct vc4_dev *vc4 = to_vc4_dev(dev); +@@ -95,6 +136,7 @@ static const struct drm_ioctl_desc vc4_d + DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, + DRM_ROOT_ONLY), ++ DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW), + }; + + static struct drm_driver vc4_drm_driver = { +--- a/include/uapi/drm/vc4_drm.h ++++ b/include/uapi/drm/vc4_drm.h +@@ -37,6 +37,7 @@ extern "C" { + #define DRM_VC4_MMAP_BO 0x04 + #define DRM_VC4_CREATE_SHADER_BO 0x05 + #define DRM_VC4_GET_HANG_STATE 0x06 ++#define DRM_VC4_GET_PARAM 0x07 + + #define DRM_IOCTL_VC4_SUBMIT_CL DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_SUBMIT_CL, struct drm_vc4_submit_cl) + #define DRM_IOCTL_VC4_WAIT_SEQNO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_WAIT_SEQNO, struct drm_vc4_wait_seqno) +@@ -45,6 +46,7 @@ extern "C" { + #define DRM_IOCTL_VC4_MMAP_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_MMAP_BO, struct drm_vc4_mmap_bo) + #define DRM_IOCTL_VC4_CREATE_SHADER_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_CREATE_SHADER_BO, struct drm_vc4_create_shader_bo) + #define DRM_IOCTL_VC4_GET_HANG_STATE DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_GET_HANG_STATE, struct drm_vc4_get_hang_state) ++#define DRM_IOCTL_VC4_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_GET_PARAM, struct drm_vc4_get_param) + + struct drm_vc4_submit_rcl_surface { + __u32 hindex; /* Handle index, or ~0 if not present. */ +@@ -280,6 +282,16 @@ struct drm_vc4_get_hang_state { + __u32 pad[16]; + }; + ++#define DRM_VC4_PARAM_V3D_IDENT0 0 ++#define DRM_VC4_PARAM_V3D_IDENT1 1 ++#define DRM_VC4_PARAM_V3D_IDENT2 2 ++ ++struct drm_vc4_get_param { ++ __u32 param; ++ __u32 pad; ++ __u64 value; ++}; ++ + #if defined(__cplusplus) + } + #endif |