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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>
This commit is contained in:
Luca Tettamanti 2012-08-16 11:11:18 -04:00 committed by Alex Deucher
parent 86504672f7
commit fd64ca8a9d
2 changed files with 113 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
drivers/gpu/drm/radeon/radeon.h
View File

@ -1424,6 +1424,44 @@ struct r600_vram_scratch {
u64 gpu_addr;
};
/*
* ACPI
*/
struct radeon_atif_notification_cfg {
bool enabled;
int command_code;
};
struct radeon_atif_notifications {
bool display_switch;
bool expansion_mode_change;
bool thermal_state;
bool forced_power_state;
bool system_power_state;
bool display_conf_change;
bool px_gfx_switch;
bool brightness_change;
bool dgpu_display_event;
};
struct radeon_atif_functions {
bool system_params;
bool sbios_requests;
bool select_active_disp;
bool lid_state;
bool get_tv_standard;
bool set_tv_standard;
bool get_panel_expansion_mode;
bool set_panel_expansion_mode;
bool temperature_change;
bool graphics_device_types;
};
struct radeon_atif {
struct radeon_atif_notifications notifications;
struct radeon_atif_functions functions;
struct radeon_atif_notification_cfg notification_cfg;
};
/*
* Core structure, functions and helpers.
@ -1516,6 +1554,8 @@ struct radeon_device {
/* virtual memory */
struct radeon_vm_manager vm_manager;
struct mutex gpu_clock_mutex;
/* ACPI interface */
struct radeon_atif atif;
};
int radeon_device_init(struct radeon_device *rdev,

79
drivers/gpu/drm/radeon/radeon_acpi.c
View File

@ -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;
}