diff options
| author | Liviu Dudau <Liviu.Dudau@arm.com> | 2017-04-05 11:55:26 +0100 |
|---|---|---|
| committer | Liviu Dudau <Liviu.Dudau@arm.com> | 2017-04-24 10:45:34 +0100 |
| commit | 50c7512fd7496129d774ccabf32537e9a45be186 (patch) | |
| tree | d1a834196124f4d01afea95e9cec24f61491dcab /drivers/gpu | |
| parent | 6954f24588ebddc2e3c840103f02d1fe7e65a2d6 (diff) | |
drm/mali-dp: Add core_id file to the sysfs interface
Add a core_id file in the driver's sysfs directory,
exposing the hardware CORE ID. This is useful to allow
userspace to discover the hardware version used.
Signed-off-by: Mihail Atanassov <mihail.atanassov@arm.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/arm/malidp_drv.c | 35 | ||||
| -rw-r--r-- | drivers/gpu/drm/arm/malidp_drv.h | 1 |
2 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c index eae41e26b819..24bc96f9e91c 100644 --- a/drivers/gpu/drm/arm/malidp_drv.c +++ b/drivers/gpu/drm/arm/malidp_drv.c @@ -371,6 +371,32 @@ static bool malidp_has_sufficient_address_space(const struct resource *res, return true; } +static ssize_t core_id_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct malidp_drm *malidp = drm->dev_private; + + return snprintf(buf, PAGE_SIZE, "%08x\n", malidp->core_id); +} + +DEVICE_ATTR_RO(core_id); + +static int malidp_init_sysfs(struct device *dev) +{ + int ret = device_create_file(dev, &dev_attr_core_id); + + if (ret) + DRM_ERROR("failed to create device file for core_id\n"); + + return ret; +} + +static void malidp_fini_sysfs(struct device *dev) +{ + device_remove_file(dev, &dev_attr_core_id); +} + #define MAX_OUTPUT_CHANNELS 3 static int malidp_runtime_pm_suspend(struct device *dev) @@ -503,6 +529,8 @@ static int malidp_bind(struct device *dev) DRM_INFO("found ARM Mali-DP%3x version r%dp%d\n", version >> 16, (version >> 12) & 0xf, (version >> 8) & 0xf); + malidp->core_id = version; + /* set the number of lines used for output of RGB data */ ret = of_property_read_u8_array(dev->of_node, "arm,malidp-output-port-lines", @@ -521,6 +549,10 @@ static int malidp_bind(struct device *dev) if (ret < 0) goto query_hw_fail; + ret = malidp_init_sysfs(dev); + if (ret) + goto init_fail; + /* Set the CRTC's port so that the encoder component can find it */ malidp->crtc.port = of_graph_get_port_by_id(dev->of_node, 0); @@ -580,6 +612,8 @@ irq_init_fail: bind_fail: of_node_put(malidp->crtc.port); malidp->crtc.port = NULL; +init_fail: + malidp_fini_sysfs(dev); malidp_fini(drm); query_hw_fail: pm_runtime_put(dev); @@ -614,6 +648,7 @@ static void malidp_unbind(struct device *dev) component_unbind_all(dev, drm); of_node_put(malidp->crtc.port); malidp->crtc.port = NULL; + malidp_fini_sysfs(dev); malidp_fini(drm); pm_runtime_put(dev); if (pm_runtime_enabled(dev)) diff --git a/drivers/gpu/drm/arm/malidp_drv.h b/drivers/gpu/drm/arm/malidp_drv.h index e1c784dcdd92..75070efda2fc 100644 --- a/drivers/gpu/drm/arm/malidp_drv.h +++ b/drivers/gpu/drm/arm/malidp_drv.h @@ -25,6 +25,7 @@ struct malidp_drm { wait_queue_head_t wq; atomic_t config_valid; struct drm_atomic_state *pm_state; + u32 core_id; }; #define crtc_to_malidp_device(x) container_of(x, struct malidp_drm, crtc) |