[Why] DMCU (Display MicroController Unit) is an on-GPU microcontroller in AMD graphics cards that is used in features for embedded displays such as Panel Self-Refresh
DMCU is part of the DM IP block [How] DMCU is added as an option in the enum AMDGPU_UCODE_ID DMCU needs two pieces of firmware - the initial eram and the interrupt vectors. These are treated as seperate pieces of firmware and loaded by PSP The loading occurs in the sw_init hook of DM If the firmware is not found, the sw_init hook returns without error. DMCU is not a requirement for DM to run. v2: Move dmcu firmware loading into its own function, properly release firmware, add debug messages v3: Use one binary file which contains both firmware pieces Signed-off-by: David Francis <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | 21 ++++- drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h | 10 ++ drivers/gpu/drm/amd/amdgpu/psp_v10_0.c | 6 ++ .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 94 ++++++++++++++++++- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 2 + 5 files changed, 130 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c index a942fd28dae8..3b1af1cecf14 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c @@ -322,6 +322,7 @@ static int amdgpu_ucode_init_single_fw(struct amdgpu_device *adev, { const struct common_firmware_header *header = NULL; const struct gfx_firmware_header_v1_0 *cp_hdr = NULL; + const struct dmcu_firmware_header_v1_0 *dmcu_hdr = NULL; if (NULL == ucode->fw) return 0; @@ -333,8 +334,8 @@ static int amdgpu_ucode_init_single_fw(struct amdgpu_device *adev, return 0; header = (const struct common_firmware_header *)ucode->fw->data; - cp_hdr = (const struct gfx_firmware_header_v1_0 *)ucode->fw->data; + dmcu_hdr = (const struct dmcu_firmware_header_v1_0 *)ucode->fw->data; if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP || (ucode->ucode_id != AMDGPU_UCODE_ID_CP_MEC1 && @@ -343,7 +344,9 @@ static int amdgpu_ucode_init_single_fw(struct amdgpu_device *adev, ucode->ucode_id != AMDGPU_UCODE_ID_CP_MEC2_JT && ucode->ucode_id != AMDGPU_UCODE_ID_RLC_RESTORE_LIST_CNTL && ucode->ucode_id != AMDGPU_UCODE_ID_RLC_RESTORE_LIST_GPM_MEM && - ucode->ucode_id != AMDGPU_UCODE_ID_RLC_RESTORE_LIST_SRM_MEM)) { + ucode->ucode_id != AMDGPU_UCODE_ID_RLC_RESTORE_LIST_SRM_MEM && + ucode->ucode_id != AMDGPU_UCODE_ID_DMCU_ERAM && + ucode->ucode_id != AMDGPU_UCODE_ID_DMCU_INTV)) { ucode->ucode_size = le32_to_cpu(header->ucode_size_bytes); memcpy(ucode->kaddr, (void *)((uint8_t *)ucode->fw->data + @@ -365,6 +368,20 @@ static int amdgpu_ucode_init_single_fw(struct amdgpu_device *adev, le32_to_cpu(header->ucode_array_offset_bytes) + le32_to_cpu(cp_hdr->jt_offset) * 4), ucode->ucode_size); + } else if (ucode->ucode_id == AMDGPU_UCODE_ID_DMCU_ERAM) { + ucode->ucode_size = le32_to_cpu(header->ucode_size_bytes) - + le32_to_cpu(dmcu_hdr->intv_size) * 4; + + memcpy(ucode->kaddr, (void *)((uint8_t *)ucode->fw->data + + le32_to_cpu(header->ucode_array_offset_bytes)), + ucode->ucode_size); + } else if (ucode->ucode_id == AMDGPU_UCODE_ID_DMCU_INTV) { + ucode->ucode_size = le32_to_cpu(dmcu_hdr->intv_size) * 4; + + memcpy(ucode->kaddr, (void *)((uint8_t *)ucode->fw->data + + le32_to_cpu(header->ucode_array_offset_bytes) + + le32_to_cpu(dmcu_hdr->intv_offset) * 4), + ucode->ucode_size); } else if (ucode->ucode_id == AMDGPU_UCODE_ID_RLC_RESTORE_LIST_CNTL) { ucode->ucode_size = adev->gfx.rlc.save_restore_list_cntl_size_bytes; memcpy(ucode->kaddr, adev->gfx.rlc.save_restore_list_cntl, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h index b358e7519987..13bd540709b6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h @@ -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; /* interrupt vectors offset from end of header, in words */ + uint32_t intv_size; /* size of interrupt vectors, in words */ +}; + /* 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, }; diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c index 02be34e72ed9..240dc8c85867 100644 --- a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c @@ -91,6 +91,12 @@ psp_v10_0_get_fw_type(struct amdgpu_firmware_info *ucode, enum psp_gfx_fw_type * case AMDGPU_UCODE_ID_VCN: *type = GFX_FW_TYPE_VCN; break; + case AMDGPU_UCODE_ID_DMCU_ERAM: + *type = GFX_FW_TYPE_DMCU_ERAM; + break; + case AMDGPU_UCODE_ID_DMCU_INTV: + *type = GFX_FW_TYPE_DMCU_ISR; + break; case AMDGPU_UCODE_ID_MAXIMUM: default: return -EINVAL; diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 5103eba75cb3..35d25b92c4d3 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -30,6 +30,7 @@ #include "vid.h" #include "amdgpu.h" #include "amdgpu_display.h" +#include "amdgpu_ucode.h" #include "atom.h" #include "amdgpu_dm.h" #include "amdgpu_pm.h" @@ -50,6 +51,7 @@ #include <linux/version.h> #include <linux/types.h> #include <linux/pm_runtime.h> +#include <linux/firmware.h> #include <drm/drmP.h> #include <drm/drm_atomic.h> @@ -71,6 +73,9 @@ #include "modules/inc/mod_freesync.h" +#define FIRMWARE_RAVEN_DMCU "amdgpu/raven_dmcu.bin" +MODULE_FIRMWARE(FIRMWARE_RAVEN_DMCU); + /* basic init/fini API */ static int amdgpu_dm_init(struct amdgpu_device *adev); static void amdgpu_dm_fini(struct amdgpu_device *adev); @@ -514,13 +519,100 @@ static void amdgpu_dm_fini(struct amdgpu_device *adev) return; } -static int dm_sw_init(void *handle) +static int load_dmcu_fw(struct amdgpu_device *adev) { + const char *fw_name_dmcu; + int r; + const struct dmcu_firmware_header_v1_0 *hdr; + + switch(adev->asic_type) { + case CHIP_BONAIRE: + case CHIP_HAWAII: + case CHIP_KAVERI: + case CHIP_KABINI: + case CHIP_MULLINS: + case CHIP_TONGA: + case CHIP_FIJI: + case CHIP_CARRIZO: + case CHIP_STONEY: + case CHIP_POLARIS11: + case CHIP_POLARIS10: + case CHIP_POLARIS12: + case CHIP_VEGAM: + case CHIP_VEGA10: + case CHIP_VEGA12: + case CHIP_VEGA20: + return 0; + case CHIP_RAVEN: + fw_name_dmcu = FIRMWARE_RAVEN_DMCU; + break; + default: + DRM_ERROR("Unsupported ASIC type: 0x%X\n", adev->asic_type); + return -1; + } + + if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) + { + DRM_DEBUG_KMS("dm: DMCU firmware not supported on direct or SMU loading\n"); + return 0; + } + + r = request_firmware_direct(&adev->dm.fw_dmcu, fw_name_dmcu, adev->dev); + if (r == -ENOENT) + { + /* DMCU firmware is not necessary, so don't raise a fuss if it's missing */ + DRM_DEBUG_KMS("dm: DMCU firmware not found\n"); + adev->dm.fw_dmcu = NULL; + return 0; + } + if (r) { + dev_err(adev->dev, "amdgpu_dm: Can't load firmware \"%s\"\n", + fw_name_dmcu); + return r; + } + + r = amdgpu_ucode_validate(adev->dm.fw_dmcu); + if (r) { + dev_err(adev->dev, "amdgpu_dm: Can't validate firmware \"%s\"\n", + fw_name_dmcu); + release_firmware(adev->dm.fw_dmcu); + adev->dm.fw_dmcu = NULL; + return r; + } + + hdr = (const struct dmcu_firmware_header_v1_0 *)adev->dm.fw_dmcu->data; + adev->firmware.ucode[AMDGPU_UCODE_ID_DMCU_ERAM].ucode_id = AMDGPU_UCODE_ID_DMCU_ERAM; + adev->firmware.ucode[AMDGPU_UCODE_ID_DMCU_ERAM].fw = adev->dm.fw_dmcu; + adev->firmware.fw_size += + ALIGN(le32_to_cpu(hdr->header.ucode_size_bytes) - le32_to_cpu(hdr->intv_size) * 4, PAGE_SIZE); + + adev->firmware.ucode[AMDGPU_UCODE_ID_DMCU_INTV].ucode_id = AMDGPU_UCODE_ID_DMCU_INTV; + adev->firmware.ucode[AMDGPU_UCODE_ID_DMCU_INTV].fw = adev->dm.fw_dmcu; + adev->firmware.fw_size += + ALIGN(le32_to_cpu(hdr->intv_size) * 4, PAGE_SIZE); + + DRM_DEBUG_KMS("PSP loading DMCU firmware\n"); + return 0; } +static int dm_sw_init(void *handle) +{ + struct amdgpu_device *adev = (struct amdgpu_device *)handle; + + return load_dmcu_fw(adev); +} + static int dm_sw_fini(void *handle) { + struct amdgpu_device *adev = (struct amdgpu_device *)handle; + + if(adev->dm.fw_dmcu) + { + release_firmware(adev->dm.fw_dmcu); + adev->dm.fw_dmcu = NULL; + } + return 0; } diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index c159584c04f7..9a57c654943a 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -129,6 +129,8 @@ struct amdgpu_display_manager { struct drm_atomic_state *cached_state; struct dm_comressor_info compressor; + + const struct firmware *fw_dmcu; }; struct amdgpu_dm_connector { -- 2.17.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
