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drm/amdgpu: Switch to LFB for USBC PD FW in psp v13

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Add USBC PD FW implementation here to be used with relevant ASICs.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alexander Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrey Grodzovsky 2021-07-12 14:30:12 -04:00 • committed by Alex Deucher
parent 25a3e8ac07
commit 85da6459f4
1 changed files with 66 additions and 0 deletions
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66
drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
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@ -35,6 +35,12 @@ MODULE_FIRMWARE("amdgpu/yellow_carp_asd.bin");
MODULE_FIRMWARE("amdgpu/yellow_carp_toc.bin");
MODULE_FIRMWARE("amdgpu/yellow_carp_ta.bin");
/* For large FW files the time to complete can be very long */
#define USBC_PD_POLLING_LIMIT_S 240
/* Read USB-PD from LFB */
#define GFX_CMD_USB_PD_USE_LFB 0x480
static int psp_v13_0_init_microcode(struct psp_context *psp)
{
struct amdgpu_device *adev = psp->adev;
@ -382,6 +388,64 @@ static void psp_v13_0_ring_set_wptr(struct psp_context *psp, uint32_t value)
WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_67, value);
}
static int psp_v13_0_load_usbc_pd_fw(struct psp_context *psp, uint64_t fw_pri_mc_addr)
{
struct amdgpu_device *adev = psp->adev;
uint32_t reg_status;
int ret, i = 0;
/*
* LFB address which is aligned to 1MB address and has to be
* right-shifted by 20 so that LFB address can be passed on a 32-bit C2P
* register
*/
WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_36, (fw_pri_mc_addr >> 20));
ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_35),
0x80000000, 0x80000000, false);
if (ret)
return ret;
/* Fireup interrupt so PSP can pick up the address */
WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_35, (GFX_CMD_USB_PD_USE_LFB << 16));
/* FW load takes very long time */
do {
msleep(1000);
reg_status = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_35);
if (reg_status & 0x80000000)
goto done;
} while (++i < USBC_PD_POLLING_LIMIT_S);
return -ETIME;
done:
if ((reg_status & 0xFFFF) != 0) {
DRM_ERROR("Address load failed - MP0_SMN_C2PMSG_35.Bits [15:0] = %04x\n",
reg_status & 0xFFFF);
return -EIO;
}
return 0;
}
static int psp_v13_0_read_usbc_pd_fw(struct psp_context *psp, uint32_t *fw_ver)
{
struct amdgpu_device *adev = psp->adev;
int ret;
WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_35, C2PMSG_CMD_GFX_USB_PD_FW_VER);
ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_35),
0x80000000, 0x80000000, false);
if (!ret)
*fw_ver = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_36);
return ret;
}
static const struct psp_funcs psp_v13_0_funcs = {
.init_microcode = psp_v13_0_init_microcode,
.bootloader_load_kdb = psp_v13_0_bootloader_load_kdb,
@ -393,6 +457,8 @@ static const struct psp_funcs psp_v13_0_funcs = {
.ring_destroy = psp_v13_0_ring_destroy,
.ring_get_wptr = psp_v13_0_ring_get_wptr,
.ring_set_wptr = psp_v13_0_ring_set_wptr,
.load_usbc_pd_fw = psp_v13_0_load_usbc_pd_fw,
.read_usbc_pd_fw = psp_v13_0_read_usbc_pd_fw
};
void psp_v13_0_set_psp_funcs(struct psp_context *psp)