[PATCH 02/17] drm/i915/icl: add ICL support to cnl_set_procmon_ref_values

Paulo Zanoni
2018-02-02T16:23:11Z

On ICL we have two sets of registers: one for port A and another for
port B. The set of port A registers is the same as the CNL registers.

Since the procmon table on ICL is the same we want to reuse the CNL
function. To do that we add a port argument and make CNL always call
the function passing port A. This way, we'll be able to easily reuse
the function on ICL when we add icl_display_core_init().

v2: Don't use _PICK() when you can use a ternary operator.
v3: Don't use a ternary operation when you can use _MMIO_PORT (Ville).
Add an extra comment about why we're passing PORT_A (James).

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 22 ++++++++++++++++++++++
drivers/gpu/drm/i915/intel_runtime_pm.c | 22 +++++++++++++++-------
2 files changed, 37 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 65ba10ad1fe5..f6e1677e8211 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2104,6 +2104,28 @@ enum i915_power_well_id {
#define CNL_PORT_COMP_DW9 _MMIO(0x162124)
#define CNL_PORT_COMP_DW10 _MMIO(0x162128)

+#define _ICL_PORT_COMP_DW0_A 0x162100
+#define _ICL_PORT_COMP_DW0_B 0x6C100
+#define ICL_PORT_COMP_DW0(port) _MMIO_PORT(port, _ICL_PORT_COMP_DW0_A, \
+ _ICL_PORT_COMP_DW0_B)
+#define _ICL_PORT_COMP_DW1_A 0x162104
+#define _ICL_PORT_COMP_DW1_B 0x6C104
+#define ICL_PORT_COMP_DW1(port) _MMIO_PORT(port, _ICL_PORT_COMP_DW1_A, \
+ _ICL_PORT_COMP_DW1_B)
+#define _ICL_PORT_COMP_DW3_A 0x16210C
+#define _ICL_PORT_COMP_DW3_B 0x6C10C
+#define ICL_PORT_COMP_DW3(port) _MMIO_PORT(port, _ICL_PORT_COMP_DW3_A, \
+ _ICL_PORT_COMP_DW3_B)
+#define _ICL_PORT_COMP_DW9_A 0x162124
+#define _ICL_PORT_COMP_DW9_B 0x6C124
+#define ICL_PORT_COMP_DW9(port) _MMIO_PORT(port, _ICL_PORT_COMP_DW9_A, \
+ _ICL_PORT_COMP_DW9_B)
+#define _ICL_PORT_COMP_DW10_A 0x162128
+#define _ICL_PORT_COMP_DW10_B 0x6C128
+#define ICL_PORT_COMP_DW10(port) _MMIO_PORT(port, \
+ _ICL_PORT_COMP_DW10_A, \
+ _ICL_PORT_COMP_DW10_B)
+
/* BXT PHY Ref registers */
#define _PORT_REF_DW3_A 0x16218C
#define _PORT_REF_DW3_BC 0x6C18C
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 70e659772a7a..b4ef7875f055 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -2794,12 +2794,19 @@ static const struct cnl_procmon {
{ .dw1 = 0x00440000, .dw9 = 0x9A00AB25, .dw10 = 0x8AE38FF1, },
};

-static void cnl_set_procmon_ref_values(struct drm_i915_private *dev_priv)
+/*
+ * CNL has just one set of registers, while ICL has two sets: one for port A and
+ * the other for port B. The CNL registers are equivalent to the ICL port A
+ * registers, that's why we call the ICL macros even though the function has CNL
+ * on its name.
+ */
+static void cnl_set_procmon_ref_values(struct drm_i915_private *dev_priv,
+ enum port port)
{
const struct cnl_procmon *procmon;
u32 val;

- val = I915_READ(CNL_PORT_COMP_DW3);
+ val = I915_READ(ICL_PORT_COMP_DW3(port));
switch (val & (PROCESS_INFO_MASK | VOLTAGE_INFO_MASK)) {
default:
MISSING_CASE(val);
@@ -2820,13 +2827,13 @@ static void cnl_set_procmon_ref_values(struct drm_i915_private *dev_priv)
break;
}

- val = I915_READ(CNL_PORT_COMP_DW1);
+ val = I915_READ(ICL_PORT_COMP_DW1(port));
val &= ~((0xff << 16) | 0xff);
val |= procmon->dw1;
- I915_WRITE(CNL_PORT_COMP_DW1, val);
+ I915_WRITE(ICL_PORT_COMP_DW1(port), val);

- I915_WRITE(CNL_PORT_COMP_DW9, procmon->dw9);
- I915_WRITE(CNL_PORT_COMP_DW10, procmon->dw10);
+ I915_WRITE(ICL_PORT_COMP_DW9(port), procmon->dw9);
+ I915_WRITE(ICL_PORT_COMP_DW10(port), procmon->dw10);
}

static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool resume)
@@ -2847,7 +2854,8 @@ static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool resume
val &= ~CNL_COMP_PWR_DOWN;
I915_WRITE(CHICKEN_MISC_2, val);

- cnl_set_procmon_ref_values(dev_priv);
+ /* Dummy PORT_A to get the correct CNL register from the ICL macro */
+ cnl_set_procmon_ref_values(dev_priv, PORT_A);

val = I915_READ(CNL_PORT_COMP_DW0);
val |= COMP_INIT;
--
2.14.3