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drm/amd/pm: conditionally disable pcie lane switching for some sienna_cichlid SKUs

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Disable the pcie lane switching for some sienna_cichlid SKUs since it
might not work well on some platforms.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Evan Quan 2023-04-06 12:08:21 +08:00 committed by Alex Deucher
parent 1d13c49cf4
commit 38e4ced804
1 changed files with 74 additions and 18 deletions
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92
drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
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@ -2067,33 +2067,94 @@ static int sienna_cichlid_display_disable_memory_clock_switch(struct smu_context
return ret;
}
static void sienna_cichlid_get_override_pcie_settings(struct smu_context *smu,
uint32_t *gen_speed_override,
uint32_t *lane_width_override)
{
struct amdgpu_device *adev = smu->adev;
*gen_speed_override = 0xff;
*lane_width_override = 0xff;
switch (adev->pdev->device) {
case 0x73A0:
case 0x73A1:
case 0x73A2:
case 0x73A3:
case 0x73AB:
case 0x73AE:
/* Bit 7:0: PCIE lane width, 1 to 7 corresponds is x1 to x32 */
*lane_width_override = 6;
break;
case 0x73E0:
case 0x73E1:
case 0x73E3:
*lane_width_override = 4;
break;
case 0x7420:
case 0x7421:
case 0x7422:
case 0x7423:
case 0x7424:
*lane_width_override = 3;
break;
default:
break;
}
}
#define MAX(a, b) ((a) > (b) ? (a) : (b))
static int sienna_cichlid_update_pcie_parameters(struct smu_context *smu,
uint32_t pcie_gen_cap,
uint32_t pcie_width_cap)
{
struct smu_11_0_dpm_context *dpm_context = smu->smu_dpm.dpm_context;
uint32_t smu_pcie_arg;
struct smu_11_0_pcie_table *pcie_table = &dpm_context->dpm_tables.pcie_table;
uint32_t gen_speed_override, lane_width_override;
uint8_t *table_member1, *table_member2;
uint32_t min_gen_speed, max_gen_speed;
uint32_t min_lane_width, max_lane_width;
uint32_t smu_pcie_arg;
int ret, i;
GET_PPTABLE_MEMBER(PcieGenSpeed, &table_member1);
GET_PPTABLE_MEMBER(PcieLaneCount, &table_member2);
/* lclk dpm table setup */
for (i = 0; i < MAX_PCIE_CONF; i++) {
dpm_context->dpm_tables.pcie_table.pcie_gen[i] = table_member1[i];
dpm_context->dpm_tables.pcie_table.pcie_lane[i] = table_member2[i];
sienna_cichlid_get_override_pcie_settings(smu,
&gen_speed_override,
&lane_width_override);
/* PCIE gen speed override */
if (gen_speed_override != 0xff) {
min_gen_speed = MIN(pcie_gen_cap, gen_speed_override);
max_gen_speed = MIN(pcie_gen_cap, gen_speed_override);
} else {
min_gen_speed = MAX(0, table_member1[0]);
max_gen_speed = MIN(pcie_gen_cap, table_member1[1]);
min_gen_speed = min_gen_speed > max_gen_speed ?
max_gen_speed : min_gen_speed;
}
pcie_table->pcie_gen[0] = min_gen_speed;
pcie_table->pcie_gen[1] = max_gen_speed;
/* PCIE lane width override */
if (lane_width_override != 0xff) {
min_lane_width = MIN(pcie_width_cap, lane_width_override);
max_lane_width = MIN(pcie_width_cap, lane_width_override);
} else {
min_lane_width = MAX(1, table_member2[0]);
max_lane_width = MIN(pcie_width_cap, table_member2[1]);
min_lane_width = min_lane_width > max_lane_width ?
max_lane_width : min_lane_width;
}
pcie_table->pcie_lane[0] = min_lane_width;
pcie_table->pcie_lane[1] = max_lane_width;
for (i = 0; i < NUM_LINK_LEVELS; i++) {
smu_pcie_arg = (i << 16) |
((table_member1[i] <= pcie_gen_cap) ?
(table_member1[i] << 8) :
(pcie_gen_cap << 8)) |
((table_member2[i] <= pcie_width_cap) ?
table_member2[i] :
pcie_width_cap);
smu_pcie_arg = (i << 16 |
pcie_table->pcie_gen[i] << 8 |
pcie_table->pcie_lane[i]);
ret = smu_cmn_send_smc_msg_with_param(smu,
SMU_MSG_OverridePcieParameters,
@ -2101,11 +2162,6 @@ static int sienna_cichlid_update_pcie_parameters(struct smu_context *smu,
NULL);
if (ret)
return ret;
if (table_member1[i] > pcie_gen_cap)
dpm_context->dpm_tables.pcie_table.pcie_gen[i] = pcie_gen_cap;
if (table_member2[i] > pcie_width_cap)
dpm_context->dpm_tables.pcie_table.pcie_lane[i] = pcie_width_cap;
}
return 0;