[PATCH 08/16] drm/msm/a6xx: Update HFI definitions

Akhil P Oommen
2026-03-23T20:13:25Z

Update the HFI definitions to support additional GMU based power
features.

Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
---
drivers/gpu/drm/msm/adreno/a6xx_hfi.c | 3 -
drivers/gpu/drm/msm/adreno/a6xx_hfi.h | 113 +++++++++++++++++++++++++++++++++-
2 files changed, 111 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
index aef00c2dd137..d613bf00e3f8 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
@@ -851,7 +851,6 @@ static int a6xx_hfi_feature_ctrl_msg(struct a6xx_gmu *gmu, u32 feature, u32 enab
return a6xx_hfi_send_msg(gmu, HFI_H2F_FEATURE_CTRL, &msg, sizeof(msg), NULL, 0);
}

-#define HFI_FEATURE_IFPC 9
#define IFPC_LONG_HYST 0x1680

static int a6xx_hfi_enable_ifpc(struct a6xx_gmu *gmu)
@@ -862,8 +861,6 @@ static int a6xx_hfi_enable_ifpc(struct a6xx_gmu *gmu)
return a6xx_hfi_feature_ctrl_msg(gmu, HFI_FEATURE_IFPC, 1, IFPC_LONG_HYST);
}

-#define HFI_FEATURE_ACD 12
-
static int a6xx_hfi_enable_acd(struct a6xx_gmu *gmu)
{
struct a6xx_hfi_acd_table *acd_table = &gmu->acd_table;
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_hfi.h b/drivers/gpu/drm/msm/adreno/a6xx_hfi.h
index 217708b03f6f..917b9c9e9906 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_hfi.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_hfi.h
@@ -165,6 +165,42 @@ struct a6xx_hfi_acd_table {
u32 data[16 * MAX_ACD_STRIDE];
} __packed;

+#define CLX_DATA(irated, num_phases, clx_path, extd_intf) \
+ ((extd_intf << 29) | \
+ (clx_path << 28) | \
+ (num_phases << 22) | \
+ (irated << 16))
+
+struct a6xx_hfi_clx_domain_v2 {
+ /**
+ * @data: BITS[0:15] Migration time
+ * BITS[16:21] Current rating
+ * BITS[22:27] Phases for domain
+ * BITS[28:28] Path notification
+ * BITS[29:31] Extra features
+ */
+ u32 data;
+ /** @clxt: CLX time in microseconds */
+ u32 clxt;
+ /** @clxh: CLH time in microseconds */
+ u32 clxh;
+ /** @urg_mode: Urgent HW throttle mode of operation */
+ u32 urg_mode;
+ /** @lkg_en: Enable leakage current estimate */
+ u32 lkg_en;
+ /** curr_budget: Current Budget */
+ u32 curr_budget;
+} __packed;
+
+#define HFI_H2F_MSG_CLX_TBL 8
+
+#define MAX_CLX_DOMAINS 2
+struct a6xx_hfi_clx_table_v2_cmd {
+ u32 hdr;
+ u32 version;
+ struct a6xx_hfi_clx_domain_v2 domain[MAX_CLX_DOMAINS];
+} __packed;
+
#define HFI_H2F_MSG_START 10

struct a6xx_hfi_msg_start {
@@ -176,6 +212,41 @@ struct a6xx_hfi_msg_start {
struct a6xx_hfi_msg_feature_ctrl {
u32 header;
u32 feature;
+#define HFI_FEATURE_DCVS 0
+#define HFI_FEATURE_HWSCHED 1
+#define HFI_FEATURE_PREEMPTION 2
+#define HFI_FEATURE_CLOCKS_ON 3
+#define HFI_FEATURE_BUS_ON 4
+#define HFI_FEATURE_RAIL_ON 5
+#define HFI_FEATURE_HWCG 6
+#define HFI_FEATURE_LM 7
+#define HFI_FEATURE_THROTTLE 8
+#define HFI_FEATURE_IFPC 9
+#define HFI_FEATURE_NAP 10
+#define HFI_FEATURE_BCL 11
+#define HFI_FEATURE_ACD 12
+#define HFI_FEATURE_DIDT 13
+#define HFI_FEATURE_DEPRECATED 14
+#define HFI_FEATURE_CB 15
+#define HFI_FEATURE_KPROF 16
+#define HFI_FEATURE_BAIL_OUT_TIMER 17
+#define HFI_FEATURE_GMU_STATS 18
+#define HFI_FEATURE_DBQ 19
+#define HFI_FEATURE_MINBW 20
+#define HFI_FEATURE_CLX 21
+#define HFI_FEATURE_LSR 23
+#define HFI_FEATURE_LPAC 24
+#define HFI_FEATURE_HW_FENCE 25
+#define HFI_FEATURE_PERF_NORETAIN 26
+#define HFI_FEATURE_DMS 27
+#define HFI_FEATURE_THERMAL 28
+#define HFI_FEATURE_AQE 29
+#define HFI_FEATURE_TDCVS 30
+#define HFI_FEATURE_DCE 31
+#define HFI_FEATURE_IFF_PCLX 32
+#define HFI_FEATURE_SOFT_RESET 0x10000001
+#define HFI_FEATURE_DCVS_PROFILE 0x10000002
+#define HFI_FEATURE_FAST_CTX_DESTROY 0x10000003
u32 enable;
u32 data;
} __packed;
@@ -199,8 +270,17 @@ struct a6xx_hfi_table {
u32 header;
u32 version;
u32 type;
-#define HFI_TABLE_BW_VOTE 0
-#define HFI_TABLE_GPU_PERF 1
+#define HFI_TABLE_BW_VOTE 0
+#define HFI_TABLE_GPU_PERF 1
+#define HFI_TABLE_DIDT 2
+#define HFI_TABLE_ACD 3
+#define HFI_TABLE_CLX_V1 4 /* Unused */
+#define HFI_TABLE_CLX_V2 5
+#define HFI_TABLE_THERM 6
+#define HFI_TABLE_DCVS 7
+#define HFI_TABLE_SYS_TIME 8
+#define HFI_TABLE_GMU_DCVS 9
+#define HFI_TABLE_LIMITS_MIT 10
struct a6xx_hfi_table_entry entry[];
} __packed;

@@ -226,4 +306,33 @@ struct a6xx_hfi_prep_slumber_cmd {
u32 freq;
} __packed;

+struct a6xx_hfi_limits_cfg {
+ u32 enable;
+ u32 msg_path;
+ u32 lkg_en;
+ /**
+ * @mode: BIT[0]: 0 = (static) throttle to fixed sid level
+ * 1 = (dynamic) throttle to sid lievel calculated by HW
+ * BIT[1]: 0 = Mx
+ * 1 = Bx
+ */
+ u32 mode;
+ u32 sid;
+ /** @mit_time: mitigation time in microseconds */
+ u32 mit_time;
+ /** @curr_limit: Max current in mA during mitigation */
+ u32 curr_limit;
+} __packed;
+
+struct a6xx_hfi_limits_tbl {
+ u8 feature_id;
+#define GMU_MIT_IFF 0
+#define GMU_MIT_PCLX 1
+ u8 domain;
+#define GMU_GX_DOMAIN 0
+#define GMU_MX_DOMAIN 1
+ u16 feature_rev;
+ struct a6xx_hfi_limits_cfg cfg;
+} __packed;
+
#endif

--
2.51.0