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cpufreq: Correct fixup for M2 devices

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Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2023-04-19 04:44:58 +09:00
parent a81314fe77
commit b8b76f34f4
1 changed files with 18 additions and 4 deletions
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22
src/cpufreq.c
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@ -11,7 +11,8 @@
#define CLUSTER_PSTATE_BUSY BIT(31)
#define CLUSTER_PSTATE_SET BIT(25)
#define CLUSTER_PSTATE_UNK BIT(20)
#define CLUSTER_PSTATE_UNK_M2 BIT(22)
#define CLUSTER_PSTATE_UNK_M1 BIT(20)
#define CLUSTER_PSTATE_DESIRED2 GENMASK(16, 12)
#define CLUSTER_PSTATE_DESIRED1 GENMASK(4, 0)
@ -62,13 +63,26 @@ void cpufreq_fixup_cluster(const struct cluster_t *cluster)
{
u64 val = read64(cluster->base + CLUSTER_PSTATE);
// Older versions of m1n1 stage 1 erroneously cleared CLUSTER_PSTATE_UNK, so put it back for
// Older versions of m1n1 stage 1 erroneously cleared CLUSTER_PSTATE_UNK_Mx, so put it back for
// firmwares it supported (don't touch anything newer, which includes newer devices).
// Also clear the CLUSTER_PSTATE_DESIRED2 field since it doesn't seem to do anything, and isn't
// used on newer chips.
if (os_firmware.version != V_UNKNOWN && os_firmware.version <= V13_3) {
if (!(val & CLUSTER_PSTATE_UNK) || (val & CLUSTER_PSTATE_DESIRED2)) {
val |= CLUSTER_PSTATE_UNK;
u64 bits = 0;
switch (chip_id) {
case T8103:
case T6000 ... T6002:
bits = CLUSTER_PSTATE_UNK_M1;
break;
case T8112:
case T6020 ... T6021:
bits = CLUSTER_PSTATE_UNK_M2;
break;
default:
return;
}
if (!(val & bits) || (val & CLUSTER_PSTATE_DESIRED2)) {
val |= bits;
val &= ~CLUSTER_PSTATE_DESIRED2;
printf("cpufreq: Correcting setting for cluster %s\n", cluster->name);
write64(cluster->base + CLUSTER_PSTATE, val);