011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
125 lines
4.2 KiB
Diff
125 lines
4.2 KiB
Diff
From 03f4e4a6e625306671266db609b4f4d488b6cf6d Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Fri, 1 Jul 2016 13:10:38 -0700
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Subject: [PATCH] drm/vc4: Add a getparam ioctl for getting the V3D identity
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regs.
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As I extend the driver to support different V3D revisions, userspace
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needs to know what version it's targeting. This is most easily
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detected using the V3D identity registers.
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v2: Make sure V3D is runtime PM on when reading the registers.
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v3: Switch to a 64-bit param value (suggested by Rob Clark in review)
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Signed-off-by: Eric Anholt <eric@anholt.net>
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Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v2)
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Reviewed-by: Rob Clark <robdclark@gmail.com> (v3, over irc)
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(cherry picked from commit af713795c59fea36161a7debf97dbc10bf652cf7)
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v4: Squashed in "drm/vc4: Fix handling of a pm_runtime_get_sync() success case."
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---
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drivers/gpu/drm/vc4/vc4_drv.c | 42 ++++++++++++++++++++++++++++++++++++++++++
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include/uapi/drm/vc4_drm.h | 12 ++++++++++++
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2 files changed, 54 insertions(+)
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--- a/drivers/gpu/drm/vc4/vc4_drv.c
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+++ b/drivers/gpu/drm/vc4/vc4_drv.c
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@@ -15,6 +15,7 @@
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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+#include <linux/pm_runtime.h>
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#include "drm_fb_cma_helper.h"
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#include "uapi/drm/vc4_drm.h"
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@@ -64,6 +65,46 @@ void vc4_dump_regs32(const struct debugf
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}
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}
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+static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
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+ struct drm_file *file_priv)
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+{
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+ struct vc4_dev *vc4 = to_vc4_dev(dev);
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+ struct drm_vc4_get_param *args = data;
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+ int ret;
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+
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+ if (args->pad != 0)
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+ return -EINVAL;
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+
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+ switch (args->param) {
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+ case DRM_VC4_PARAM_V3D_IDENT0:
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+ ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
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+ if (ret < 0)
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+ return ret;
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+ args->value = V3D_READ(V3D_IDENT0);
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+ pm_runtime_put(&vc4->v3d->pdev->dev);
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+ break;
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+ case DRM_VC4_PARAM_V3D_IDENT1:
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+ ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
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+ if (ret < 0)
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+ return ret;
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+ args->value = V3D_READ(V3D_IDENT1);
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+ pm_runtime_put(&vc4->v3d->pdev->dev);
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+ break;
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+ case DRM_VC4_PARAM_V3D_IDENT2:
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+ ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
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+ if (ret < 0)
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+ return ret;
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+ args->value = V3D_READ(V3D_IDENT2);
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+ pm_runtime_put(&vc4->v3d->pdev->dev);
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+ break;
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+ default:
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+ DRM_DEBUG("Unknown parameter %d\n", args->param);
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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static void vc4_lastclose(struct drm_device *dev)
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{
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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@@ -95,6 +136,7 @@ static const struct drm_ioctl_desc vc4_d
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DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
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DRM_ROOT_ONLY),
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+ DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
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};
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static struct drm_driver vc4_drm_driver = {
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--- a/include/uapi/drm/vc4_drm.h
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+++ b/include/uapi/drm/vc4_drm.h
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@@ -37,6 +37,7 @@ extern "C" {
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#define DRM_VC4_MMAP_BO 0x04
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#define DRM_VC4_CREATE_SHADER_BO 0x05
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#define DRM_VC4_GET_HANG_STATE 0x06
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+#define DRM_VC4_GET_PARAM 0x07
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#define DRM_IOCTL_VC4_SUBMIT_CL DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_SUBMIT_CL, struct drm_vc4_submit_cl)
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#define DRM_IOCTL_VC4_WAIT_SEQNO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_WAIT_SEQNO, struct drm_vc4_wait_seqno)
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@@ -45,6 +46,7 @@ extern "C" {
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#define DRM_IOCTL_VC4_MMAP_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_MMAP_BO, struct drm_vc4_mmap_bo)
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#define DRM_IOCTL_VC4_CREATE_SHADER_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_CREATE_SHADER_BO, struct drm_vc4_create_shader_bo)
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#define DRM_IOCTL_VC4_GET_HANG_STATE DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_GET_HANG_STATE, struct drm_vc4_get_hang_state)
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+#define DRM_IOCTL_VC4_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_GET_PARAM, struct drm_vc4_get_param)
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struct drm_vc4_submit_rcl_surface {
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__u32 hindex; /* Handle index, or ~0 if not present. */
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@@ -280,6 +282,16 @@ struct drm_vc4_get_hang_state {
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__u32 pad[16];
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};
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+#define DRM_VC4_PARAM_V3D_IDENT0 0
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+#define DRM_VC4_PARAM_V3D_IDENT1 1
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+#define DRM_VC4_PARAM_V3D_IDENT2 2
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+
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+struct drm_vc4_get_param {
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+ __u32 param;
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+ __u32 pad;
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+ __u64 value;
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+};
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+
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#if defined(__cplusplus)
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}
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#endif
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