[PATCH v2 03/10] drm/i915/xe3lpd: Add new display power wells

[Matt Atwood]

From: Matt Roper <matthew.d.roper at intel.com>

Xe3's power well handling is similar to previous platforms, but there
are a few changes that need to be handled to ensure optimal power
management:
 - PGB now only depends on PG1, not PG2
 - Transcoder B is now in PG1 (was previously in PGB)
 - Transcoders C & D are now in PG2 (were previously in PGC/PGD)
 - DC states now require PG2 to be off (whereas on Xe2 it could remain
   on as a dependency of PGB, although the features inside of it could
   not be used).

Bspec: 72519, 68851
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Matt Atwood <matthew.s.atwood at intel.com>
Reviewed-by: Luca Coelho <luciano.coelho at intel.com>
---
 .../i915/display/intel_display_power_map.c    | 135 +++++++++++++++++-
 1 file changed, 134 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power_map.c b/drivers/gpu/drm/i915/display/intel_display_power_map.c
index 10948b3964ee..255b2c09607c 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_map.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_map.c
@@ -1586,6 +1586,137 @@ static const struct i915_power_well_desc_list xe2lpd_power_wells[] = {
 	I915_PW_DESCRIPTORS(xe2lpd_power_wells_pica),
 };
 
+/*
+ * Xe3 changes the power well hierarchy slightly from Xe_LPD+; PGB now
+ * depends on PG1 instead of PG2:
+ *
+ *       PG0
+ *        |
+ *     --PG1--
+ *    /   |   \
+ *  PGA  PGB  PG2
+ *           /   \
+ *         PGC   PGD
+ */
+
+#define XE3LPD_PW_C_POWER_DOMAINS \
+	POWER_DOMAIN_PIPE_C, \
+	POWER_DOMAIN_PIPE_PANEL_FITTER_C
+
+#define XE3LPD_PW_D_POWER_DOMAINS \
+	POWER_DOMAIN_PIPE_D, \
+	POWER_DOMAIN_PIPE_PANEL_FITTER_D
+
+#define XE3LPD_PW_2_POWER_DOMAINS \
+	XE3LPD_PW_C_POWER_DOMAINS, \
+	XE3LPD_PW_D_POWER_DOMAINS, \
+	POWER_DOMAIN_TRANSCODER_C, \
+	POWER_DOMAIN_TRANSCODER_D, \
+	POWER_DOMAIN_VGA, \
+	POWER_DOMAIN_PORT_DDI_LANES_TC1, \
+	POWER_DOMAIN_PORT_DDI_LANES_TC2, \
+	POWER_DOMAIN_PORT_DDI_LANES_TC3, \
+	POWER_DOMAIN_PORT_DDI_LANES_TC4
+
+I915_DECL_PW_DOMAINS(xe3lpd_pwdoms_pw_2,
+		     XE3LPD_PW_2_POWER_DOMAINS,
+		     POWER_DOMAIN_INIT);
+
+I915_DECL_PW_DOMAINS(xe3lpd_pwdoms_pw_b,
+		     POWER_DOMAIN_PIPE_B,
+		     POWER_DOMAIN_PIPE_PANEL_FITTER_B,
+		     POWER_DOMAIN_INIT);
+
+I915_DECL_PW_DOMAINS(xe3lpd_pwdoms_pw_c,
+		     XE3LPD_PW_C_POWER_DOMAINS,
+		     POWER_DOMAIN_INIT);
+
+I915_DECL_PW_DOMAINS(xe3lpd_pwdoms_pw_d,
+		     XE3LPD_PW_D_POWER_DOMAINS,
+		     POWER_DOMAIN_INIT);
+
+static const struct i915_power_well_desc xe3lpd_power_wells_main[] = {
+	{
+		.instances = &I915_PW_INSTANCES(
+			I915_PW("PW_2", &xe3lpd_pwdoms_pw_2,
+				.hsw.idx = ICL_PW_CTL_IDX_PW_2,
+				.id = SKL_DISP_PW_2),
+		),
+		.ops = &hsw_power_well_ops,
+		.has_vga = true,
+		.has_fuses = true,
+	}, {
+		.instances = &I915_PW_INSTANCES(
+			I915_PW("PW_A", &xelpd_pwdoms_pw_a,
+				.hsw.idx = XELPD_PW_CTL_IDX_PW_A),
+		),
+		.ops = &hsw_power_well_ops,
+		.irq_pipe_mask = BIT(PIPE_A),
+		.has_fuses = true,
+	}, {
+		.instances = &I915_PW_INSTANCES(
+			I915_PW("PW_B", &xe3lpd_pwdoms_pw_b,
+				.hsw.idx = XELPD_PW_CTL_IDX_PW_B),
+		),
+		.ops = &hsw_power_well_ops,
+		.irq_pipe_mask = BIT(PIPE_B),
+		.has_fuses = true,
+	}, {
+		.instances = &I915_PW_INSTANCES(
+			I915_PW("PW_C", &xe3lpd_pwdoms_pw_c,
+				.hsw.idx = XELPD_PW_CTL_IDX_PW_C),
+		),
+		.ops = &hsw_power_well_ops,
+		.irq_pipe_mask = BIT(PIPE_C),
+		.has_fuses = true,
+	}, {
+		.instances = &I915_PW_INSTANCES(
+			I915_PW("PW_D", &xe3lpd_pwdoms_pw_d,
+				.hsw.idx = XELPD_PW_CTL_IDX_PW_D),
+		),
+		.ops = &hsw_power_well_ops,
+		.irq_pipe_mask = BIT(PIPE_D),
+		.has_fuses = true,
+	}, {
+		.instances = &I915_PW_INSTANCES(
+			I915_PW("AUX_A", &icl_pwdoms_aux_a, .xelpdp.aux_ch = AUX_CH_A),
+			I915_PW("AUX_B", &icl_pwdoms_aux_b, .xelpdp.aux_ch = AUX_CH_B),
+			I915_PW("AUX_TC1", &xelpdp_pwdoms_aux_tc1, .xelpdp.aux_ch = AUX_CH_USBC1),
+			I915_PW("AUX_TC2", &xelpdp_pwdoms_aux_tc2, .xelpdp.aux_ch = AUX_CH_USBC2),
+			I915_PW("AUX_TC3", &xelpdp_pwdoms_aux_tc3, .xelpdp.aux_ch = AUX_CH_USBC3),
+			I915_PW("AUX_TC4", &xelpdp_pwdoms_aux_tc4, .xelpdp.aux_ch = AUX_CH_USBC4),
+		),
+		.ops = &xelpdp_aux_power_well_ops,
+	},
+};
+
+I915_DECL_PW_DOMAINS(xe3lpd_pwdoms_dc_off,
+	POWER_DOMAIN_DC_OFF,
+	XE3LPD_PW_2_POWER_DOMAINS,
+	XE3LPD_PW_C_POWER_DOMAINS,
+	XE3LPD_PW_D_POWER_DOMAINS,
+	POWER_DOMAIN_AUDIO_MMIO,
+	POWER_DOMAIN_INIT);
+
+static const struct i915_power_well_desc xe3lpd_power_wells_dcoff[] = {
+	{
+		.instances = &I915_PW_INSTANCES(
+			I915_PW("DC_off", &xe3lpd_pwdoms_dc_off,
+				.id = SKL_DISP_DC_OFF),
+		),
+		.ops = &gen9_dc_off_power_well_ops,
+	},
+};
+
+
+static const struct i915_power_well_desc_list xe3lpd_power_wells[] = {
+	I915_PW_DESCRIPTORS(i9xx_power_wells_always_on),
+	I915_PW_DESCRIPTORS(icl_power_wells_pw_1),
+	I915_PW_DESCRIPTORS(xe3lpd_power_wells_dcoff),
+	I915_PW_DESCRIPTORS(xe3lpd_power_wells_main),
+	I915_PW_DESCRIPTORS(xe2lpd_power_wells_pica),
+};
+
 static void init_power_well_domains(const struct i915_power_well_instance *inst,
 				    struct i915_power_well *power_well)
 {
@@ -1693,7 +1824,9 @@ int intel_display_power_map_init(struct i915_power_domains *power_domains)
 		return 0;
 	}
 
-	if (DISPLAY_VER(i915) >= 20)
+	if (DISPLAY_VER(i915) >= 30)
+		return set_power_wells(power_domains, xe3lpd_power_wells);
+	else if (DISPLAY_VER(i915) >= 20)
 		return set_power_wells(power_domains, xe2lpd_power_wells);
 	else if (DISPLAY_VER(i915) >= 14)
 		return set_power_wells(power_domains, xelpdp_power_wells);
-- 
2.45.0