drm/i915/ddi: Use power well CTL IDX instead of ID
Similarly to the previous patch use a separate request/status HW flag
index defined right after the corresponding control registers instead of
depending for this on the power well IDs. Since the set of
control/status registers varies among the different power wells (on a
single platform), also add a new i915_power_well_registers struct that
we populate and assign to each DDI power well as needed.
Also clarify a bit the code comment describing the function and layout
of the control registers.
This also fixes a problem on ICL, where we incorrectly read the KVMR
control register in hsw_power_well_requesters() even for DDI and AUX
power wells.
v2:
- Clarify platform range tags in code comments. (Paulo)
- Fix line over 80 chars checkpatch warning.
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180806095843.13294-7-imre.deak@intel.com
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ed30b4f..4f5eb49 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8925,46 +8925,78 @@ enum {
#define HSW_AUD_CHICKENBIT _MMIO(0x65f10)
#define SKL_AUD_CODEC_WAKE_SIGNAL (1 << 15)
-/* HSW Power Wells */
-#define _HSW_PWR_WELL_CTL1 0x45400
-#define _HSW_PWR_WELL_CTL2 0x45404
-#define _HSW_PWR_WELL_CTL3 0x45408
-#define _HSW_PWR_WELL_CTL4 0x4540C
-
-#define _ICL_PWR_WELL_CTL_AUX1 0x45440
-#define _ICL_PWR_WELL_CTL_AUX2 0x45444
-#define _ICL_PWR_WELL_CTL_AUX4 0x4544C
-
-#define _ICL_PWR_WELL_CTL_DDI1 0x45450
-#define _ICL_PWR_WELL_CTL_DDI2 0x45454
-#define _ICL_PWR_WELL_CTL_DDI4 0x4545C
-
/*
- * Each power well control register contains up to 16 (request, status) HW
- * flag tuples. The register index and HW flag shift is determined by the
- * power well ID (see i915_power_well_id). There are 4 possible sources of
- * power well requests each source having its own set of control registers:
- * BIOS, DRIVER, KVMR, DEBUG.
+ * HSW - ICL power wells
+ *
+ * Platforms have up to 3 power well control register sets, each set
+ * controlling up to 16 power wells via a request/status HW flag tuple:
+ * - main (HSW_PWR_WELL_CTL[1-4])
+ * - AUX (ICL_PWR_WELL_CTL_AUX[1-4])
+ * - DDI (ICL_PWR_WELL_CTL_DDI[1-4])
+ * Each control register set consists of up to 4 registers used by different
+ * sources that can request a power well to be enabled:
+ * - BIOS (HSW_PWR_WELL_CTL1/ICL_PWR_WELL_CTL_AUX1/ICL_PWR_WELL_CTL_DDI1)
+ * - DRIVER (HSW_PWR_WELL_CTL2/ICL_PWR_WELL_CTL_AUX2/ICL_PWR_WELL_CTL_DDI2)
+ * - KVMR (HSW_PWR_WELL_CTL3) (only in the main register set)
+ * - DEBUG (HSW_PWR_WELL_CTL4/ICL_PWR_WELL_CTL_AUX4/ICL_PWR_WELL_CTL_DDI4)
*/
-#define _HSW_PW_REG_IDX(pw) ((pw) >> 4)
-#define _HSW_PW_SHIFT(pw) (((pw) & 0xf) * 2)
-#define HSW_PWR_WELL_CTL_BIOS(pw) _MMIO(_PICK(_HSW_PW_REG_IDX(pw), \
- _HSW_PWR_WELL_CTL1, \
- _ICL_PWR_WELL_CTL_AUX1, \
- _ICL_PWR_WELL_CTL_DDI1))
-#define HSW_PWR_WELL_CTL_DRIVER(pw) _MMIO(_PICK(_HSW_PW_REG_IDX(pw), \
- _HSW_PWR_WELL_CTL2, \
- _ICL_PWR_WELL_CTL_AUX2, \
- _ICL_PWR_WELL_CTL_DDI2))
-/* KVMR doesn't have a reg for AUX or DDI power well control */
-#define HSW_PWR_WELL_CTL_KVMR _MMIO(_HSW_PWR_WELL_CTL3)
-#define HSW_PWR_WELL_CTL_DEBUG(pw) _MMIO(_PICK(_HSW_PW_REG_IDX(pw), \
- _HSW_PWR_WELL_CTL4, \
- _ICL_PWR_WELL_CTL_AUX4, \
- _ICL_PWR_WELL_CTL_DDI4))
+#define HSW_PWR_WELL_CTL1 _MMIO(0x45400)
+#define HSW_PWR_WELL_CTL2 _MMIO(0x45404)
+#define HSW_PWR_WELL_CTL3 _MMIO(0x45408)
+#define HSW_PWR_WELL_CTL4 _MMIO(0x4540C)
+#define HSW_PWR_WELL_CTL_REQ(pw_idx) (0x2 << ((pw_idx) * 2))
+#define HSW_PWR_WELL_CTL_STATE(pw_idx) (0x1 << ((pw_idx) * 2))
-#define HSW_PWR_WELL_CTL_REQ(pw) (1 << (_HSW_PW_SHIFT(pw) + 1))
-#define HSW_PWR_WELL_CTL_STATE(pw) (1 << _HSW_PW_SHIFT(pw))
+/* HSW/BDW power well */
+#define HSW_PW_CTL_IDX_GLOBAL 15
+
+/* SKL/BXT/GLK/CNL power wells */
+#define SKL_PW_CTL_IDX_PW_2 15
+#define SKL_PW_CTL_IDX_PW_1 14
+#define CNL_PW_CTL_IDX_AUX_F 12
+#define CNL_PW_CTL_IDX_AUX_D 11
+#define GLK_PW_CTL_IDX_AUX_C 10
+#define GLK_PW_CTL_IDX_AUX_B 9
+#define GLK_PW_CTL_IDX_AUX_A 8
+#define CNL_PW_CTL_IDX_DDI_F 6
+#define SKL_PW_CTL_IDX_DDI_D 4
+#define SKL_PW_CTL_IDX_DDI_C 3
+#define SKL_PW_CTL_IDX_DDI_B 2
+#define SKL_PW_CTL_IDX_DDI_A_E 1
+#define GLK_PW_CTL_IDX_DDI_A 1
+#define SKL_PW_CTL_IDX_MISC_IO 0
+
+/* ICL - power wells */
+#define ICL_PW_CTL_IDX_PW_4 3
+#define ICL_PW_CTL_IDX_PW_3 2
+#define ICL_PW_CTL_IDX_PW_2 1
+#define ICL_PW_CTL_IDX_PW_1 0
+
+#define ICL_PWR_WELL_CTL_AUX1 _MMIO(0x45440)
+#define ICL_PWR_WELL_CTL_AUX2 _MMIO(0x45444)
+#define ICL_PWR_WELL_CTL_AUX4 _MMIO(0x4544C)
+#define ICL_PW_CTL_IDX_AUX_TBT4 11
+#define ICL_PW_CTL_IDX_AUX_TBT3 10
+#define ICL_PW_CTL_IDX_AUX_TBT2 9
+#define ICL_PW_CTL_IDX_AUX_TBT1 8
+#define ICL_PW_CTL_IDX_AUX_F 5
+#define ICL_PW_CTL_IDX_AUX_E 4
+#define ICL_PW_CTL_IDX_AUX_D 3
+#define ICL_PW_CTL_IDX_AUX_C 2
+#define ICL_PW_CTL_IDX_AUX_B 1
+#define ICL_PW_CTL_IDX_AUX_A 0
+
+#define ICL_PWR_WELL_CTL_DDI1 _MMIO(0x45450)
+#define ICL_PWR_WELL_CTL_DDI2 _MMIO(0x45454)
+#define ICL_PWR_WELL_CTL_DDI4 _MMIO(0x4545C)
+#define ICL_PW_CTL_IDX_DDI_F 5
+#define ICL_PW_CTL_IDX_DDI_E 4
+#define ICL_PW_CTL_IDX_DDI_D 3
+#define ICL_PW_CTL_IDX_DDI_C 2
+#define ICL_PW_CTL_IDX_DDI_B 1
+#define ICL_PW_CTL_IDX_DDI_A 0
+
+/* HSW - power well misc debug registers */
#define HSW_PWR_WELL_CTL5 _MMIO(0x45410)
#define HSW_PWR_WELL_ENABLE_SINGLE_STEP (1 << 31)
#define HSW_PWR_WELL_PWR_GATE_OVERRIDE (1 << 20)
@@ -8980,18 +9012,26 @@ enum skl_power_gate {
#define SKL_FUSE_STATUS _MMIO(0x42000)
#define SKL_FUSE_DOWNLOAD_STATUS (1 << 31)
-/* PG0 (HW control->no power well ID), PG1..PG2 (SKL_DISP_PW1..SKL_DISP_PW2) */
-#define SKL_PW_TO_PG(pw) ((pw) - SKL_DISP_PW_1 + SKL_PG1)
-/* PG0 (HW control->no power well ID), PG1..PG4 (ICL_DISP_PW1..ICL_DISP_PW4) */
-#define ICL_PW_TO_PG(pw) ((pw) - ICL_DISP_PW_1 + SKL_PG1)
+/*
+ * PG0 is HW controlled, so doesn't have a corresponding power well control knob
+ * SKL_DISP_PW1_IDX..SKL_DISP_PW2_IDX -> PG1..PG2
+ */
+#define SKL_PW_CTL_IDX_TO_PG(pw_idx) \
+ ((pw_idx) - SKL_PW_CTL_IDX_PW_1 + SKL_PG1)
+/*
+ * PG0 is HW controlled, so doesn't have a corresponding power well control knob
+ * ICL_DISP_PW1_IDX..ICL_DISP_PW4_IDX -> PG1..PG4
+ */
+#define ICL_PW_CTL_IDX_TO_PG(pw_idx) \
+ ((pw_idx) - ICL_PW_CTL_IDX_PW_1 + SKL_PG1)
#define SKL_FUSE_PG_DIST_STATUS(pg) (1 << (27 - (pg)))
-#define _CNL_AUX_REG_IDX(pw) ((pw) - 9)
+#define _CNL_AUX_REG_IDX(pw_idx) ((pw_idx) - GLK_PW_CTL_IDX_AUX_B)
#define _CNL_AUX_ANAOVRD1_B 0x162250
#define _CNL_AUX_ANAOVRD1_C 0x162210
#define _CNL_AUX_ANAOVRD1_D 0x1622D0
#define _CNL_AUX_ANAOVRD1_F 0x162A90
-#define CNL_AUX_ANAOVRD1(pw) _MMIO(_PICK(_CNL_AUX_REG_IDX(pw), \
+#define CNL_AUX_ANAOVRD1(pw_idx) _MMIO(_PICK(_CNL_AUX_REG_IDX(pw_idx), \
_CNL_AUX_ANAOVRD1_B, \
_CNL_AUX_ANAOVRD1_C, \
_CNL_AUX_ANAOVRD1_D, \