diff options
| author | David Francis <David.Francis@amd.com> | 2018-11-26 11:44:06 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-11-26 15:54:39 -0500 |
| commit | 206bbafe00dcacccf40e6f09e624329ec124201b (patch) | |
| tree | 3324c64471524c6ea4c95add3ff2ee6bc9fe4114 /drivers/gpu/drm/amd/include | |
| parent | 7349a3afaaea4600be86b2663a3b9e775f9590eb (diff) | |
drm/amd: Query and use ACPI backlight caps
ACPI ATIF has a function called query
backlight transfer characteristics. Among the
information returned by this function is
the minimum and maximum input signals for the
backlight
Call that function on ACPI init. When DM
backlight device is updated, copy over the
backlight caps into DM, but only once. Use
the backlight caps in the backlight-to-dc
calculation
Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/include')
| -rw-r--r-- | drivers/gpu/drm/amd/include/amd_acpi.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/include/amd_acpi.h b/drivers/gpu/drm/amd/include/amd_acpi.h index 8980edfe5fa9..c72cbfe8f684 100644 --- a/drivers/gpu/drm/amd/include/amd_acpi.h +++ b/drivers/gpu/drm/amd/include/amd_acpi.h @@ -52,6 +52,30 @@ struct atif_sbios_requests { u8 backlight_level; /* panel backlight level (0-255) */ } __packed; +struct atif_qbtc_arguments { + u16 size; /* structure size in bytes (includes size field) */ + u8 requested_display; /* which display is requested */ +} __packed; + +#define ATIF_QBTC_MAX_DATA_POINTS 99 + +struct atif_qbtc_data_point { + u8 luminance; /* luminance in percent */ + u8 ipnut_signal; /* input signal in range 0-255 */ +} __packed; + +struct atif_qbtc_output { + u16 size; /* structure size in bytes (includes size field) */ + u16 flags; /* all zeroes */ + u8 error_code; /* error code */ + u8 ac_level; /* default brightness on AC power */ + u8 dc_level; /* default brightness on DC power */ + u8 min_input_signal; /* max input signal in range 0-255 */ + u8 max_input_signal; /* min input signal in range 0-255 */ + u8 number_of_points; /* number of data points */ + struct atif_qbtc_data_point data_points[ATIF_QBTC_MAX_DATA_POINTS]; +} __packed; + #define ATIF_NOTIFY_MASK 0x3 #define ATIF_NOTIFY_NONE 0 #define ATIF_NOTIFY_81 1 |