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authorLuca Tettamanti <kronos.it@gmail.com>2012-08-16 11:11:18 -0400
committerAlex Deucher <alexander.deucher@amd.com>2012-09-20 13:10:35 -0400
commitfd64ca8a9d9d7e92fc81fe0b23dcf324246fd356 (patch)
tree7b381a32ab4f034b7583be4aa2b1c3b58ae32b96 /drivers/gpu/drm/radeon/radeon_acpi.c
parent86504672f7d79986a8ef618fb120044220e3d1eb (diff)
drm/radeon: implement radeon_atif_verify_interface
Wrap the call to VERIFY_INTERFACE and add the parsing of the support vectors. v2: use a packed struct for handling the output of ACPI calls, hides ugly pointer arithmetics (Lee, Chun-Yi <jlee@suse.com>). v3: fix radeon_atif_parse_functions handling (Alex Deucher) Signed-off-by: Luca Tettamanti <kronos.it@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_acpi.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_acpi.c79
1 files changed, 73 insertions, 6 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_acpi.c b/drivers/gpu/drm/radeon/radeon_acpi.c
index f7b511dcba30..2f6cef2acadc 100644
--- a/drivers/gpu/drm/radeon/radeon_acpi.c
+++ b/drivers/gpu/drm/radeon/radeon_acpi.c
@@ -36,6 +36,13 @@
#include <linux/vga_switcheroo.h>
+struct atif_verify_interface {
+ u16 size; /* structure size in bytes (includes size field) */
+ u16 version; /* version */
+ u32 notification_mask; /* supported notifications mask */
+ u32 function_bits; /* supported functions bit vector */
+} __packed;
+
/* Call the ATIF method
*/
static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
@@ -75,12 +82,73 @@ static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
return buffer.pointer;
}
+static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask)
+{
+ n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
+ n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
+ n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
+ n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
+ n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
+ n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
+ n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
+ n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
+ n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
+}
+
+static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask)
+{
+ f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
+ f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
+ f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
+ f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
+ f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
+ f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
+ f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
+ f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
+ f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
+ f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
+}
+
+static int radeon_atif_verify_interface(acpi_handle handle,
+ struct radeon_atif *atif)
+{
+ union acpi_object *info;
+ struct atif_verify_interface output;
+ size_t size;
+ int err = 0;
+
+ info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
+ if (!info)
+ return -EIO;
+
+ memset(&output, 0, sizeof(output));
+
+ size = *(u16 *) info->buffer.pointer;
+ if (size < 12) {
+ DRM_INFO("ATIF buffer is too small: %lu\n", size);
+ err = -EINVAL;
+ goto out;
+ }
+ size = min(sizeof(output), size);
+
+ memcpy(&output, info->buffer.pointer, size);
+
+ /* TODO: check version? */
+ DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
+
+ radeon_atif_parse_notification(&atif->notifications, output.notification_mask);
+ radeon_atif_parse_functions(&atif->functions, output.function_bits);
+
+out:
+ kfree(info);
+ return err;
+}
+
/* Call all ACPI methods here */
int radeon_acpi_init(struct radeon_device *rdev)
{
acpi_handle handle;
- union acpi_object *info;
- int ret = 0;
+ int ret;
/* Get the device handle */
handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
@@ -90,11 +158,10 @@ int radeon_acpi_init(struct radeon_device *rdev)
return 0;
/* Call the ATIF method */
- info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
- if (!info)
- ret = -EIO;
+ ret = radeon_atif_verify_interface(handle, &rdev->atif);
+ if (ret)
+ DRM_DEBUG_DRIVER("Call to verify_interface failed: %d\n", ret);
- kfree(info);
return ret;
}