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drm/amd: Add ucode DMCU support

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DMCU (Display Microcontroller Unit) is a GPU chip involved in
eDP features like Adaptive Backlight Modulation and Panel Self
Refresh.

DMCU has two pieces of firmware: the ERAM and the interrupt
vectors, which must be loaded seperately.

To this end, the DMCU firmware has a custom header and parsing
logic similar to MEC, to extract the two ucodes from a single
struct firmware.

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Francis
2018-09-11 13:41:01 -04:00
committed by Alex Deucher
parent 240cd9a642
commit 01fcfc83fe
2 changed files with 29 additions and 2 deletions
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10
drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h
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@@ -157,6 +157,13 @@ struct gpu_info_firmware_header_v1_0 {
uint16_t version_minor; /* version */
};
/* version_major=1, version_minor=0 */
struct dmcu_firmware_header_v1_0 {
struct common_firmware_header header;
uint32_t intv_offset_bytes; /* interrupt vectors offset from end of header, in bytes */
uint32_t intv_size_bytes; /* size of interrupt vectors, in bytes */
};
/* header is fixed size */
union amdgpu_firmware_header {
struct common_firmware_header common;
@@ -170,6 +177,7 @@ union amdgpu_firmware_header {
struct sdma_firmware_header_v1_0 sdma;
struct sdma_firmware_header_v1_1 sdma_v1_1;
struct gpu_info_firmware_header_v1_0 gpu_info;
struct dmcu_firmware_header_v1_0 dmcu;
uint8_t raw[0x100];
};
@@ -196,6 +204,8 @@ enum AMDGPU_UCODE_ID {
AMDGPU_UCODE_ID_UVD1,
AMDGPU_UCODE_ID_VCE,
AMDGPU_UCODE_ID_VCN,
AMDGPU_UCODE_ID_DMCU_ERAM,
AMDGPU_UCODE_ID_DMCU_INTV,
AMDGPU_UCODE_ID_MAXIMUM,
};