From: Rodrigo Vivi <rodrigo.v...@intel.com>
commit 3d02352cd9e8b43805bf68e50e395fda2e218791 upstream.
On CNP PCH based platforms the gmbus is on the south display that
is on PCH. The existing implementation for previous platforms
already covers the need for CNP expect for the pin pair configuration
that follows similar definitions that we had on BXT.
v2: Don't drop "_BXT" as the indicator of the first platform
supporting this pin numbers. Suggested by Daniel.
v3: Add missing else and fix register table since CNP GPIO_CTL
starts on 0xC5014.
v4: Fix pin number and map according to the current available VBT.
Re-add pin 4 for port D. Lost during some rebase.
v5: Use table as spec. If VBT is wrong it should be ignored.
Cc: Daniel Vetter <daniel.vet...@intel.com>
Cc: Jani Nikula <jani.nik...@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.sriva...@intel.com>
Link:
http://patchwork.freedesktop.org/patch/msgid/1496434004-29812-5-git-send-email-rodrigo.v...@intel.com
Signed-off-by: Liwei Song <liwei.song.ls...@gmail.com>
---
drivers/gpu/drm/i915/i915_reg.h | 3 ++-
drivers/gpu/drm/i915/intel_hdmi.c | 8 +++++---
drivers/gpu/drm/i915/intel_i2c.c | 15 +++++++++++++--
3 files changed, 20 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index fed73c543d0c..8a9a6ba32076 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2618,9 +2618,10 @@ enum skl_disp_power_wells {
#define GMBUS_PIN_DPB 5 /* SDVO, HDMIB */
#define GMBUS_PIN_DPD 6 /* HDMID */
#define GMBUS_PIN_RESERVED 7 /* 7 reserved */
-#define GMBUS_PIN_1_BXT 1
+#define GMBUS_PIN_1_BXT 1 /* BXT+ (atom) and CNP+ (big core) */
#define GMBUS_PIN_2_BXT 2
#define GMBUS_PIN_3_BXT 3
+#define GMBUS_PIN_4_CNP 4
#define GMBUS_NUM_PINS 7 /* including 0 */
#define GMBUS1 _MMIO(dev_priv->gpio_mmio_base + 0x5104) /*
command/status */
#define GMBUS_SW_CLR_INT (1<<31)
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c
b/drivers/gpu/drm/i915/intel_hdmi.c
index 1d623b5e09d6..94241c84ede7 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1892,19 +1892,21 @@ static u8 intel_hdmi_ddc_pin(struct drm_i915_private
*dev_priv,
switch (port) {
case PORT_B:
- if (IS_GEN9_LP(dev_priv))
+ if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv))
ddc_pin = GMBUS_PIN_1_BXT;
else
ddc_pin = GMBUS_PIN_DPB;
break;
case PORT_C:
- if (IS_GEN9_LP(dev_priv))
+ if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv))
ddc_pin = GMBUS_PIN_2_BXT;
else
ddc_pin = GMBUS_PIN_DPC;
break;
case PORT_D:
- if (IS_CHERRYVIEW(dev_priv))
+ if (HAS_PCH_CNP(dev_priv))
+ ddc_pin = GMBUS_PIN_4_CNP;
+ else if (IS_CHERRYVIEW(dev_priv))
ddc_pin = GMBUS_PIN_DPD_CHV;
else
ddc_pin = GMBUS_PIN_DPD;
diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index b6401e8f1bd6..3c9e00d4ba5a 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -68,11 +68,20 @@ static const struct gmbus_pin gmbus_pins_bxt[] = {
[GMBUS_PIN_3_BXT] = { "misc", GPIOD },
};
+static const struct gmbus_pin gmbus_pins_cnp[] = {
+ [GMBUS_PIN_1_BXT] = { "dpb", GPIOB },
+ [GMBUS_PIN_2_BXT] = { "dpc", GPIOC },
+ [GMBUS_PIN_3_BXT] = { "misc", GPIOD },
+ [GMBUS_PIN_4_CNP] = { "dpd", GPIOE },
+};
+
/* pin is expected to be valid */
static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *dev_priv,
unsigned int pin)
{
- if (IS_GEN9_LP(dev_priv))
+ if (HAS_PCH_CNP(dev_priv))
+ return &gmbus_pins_cnp[pin];
+ else if (IS_GEN9_LP(dev_priv))
return &gmbus_pins_bxt[pin];
else if (IS_GEN9_BC(dev_priv))
return &gmbus_pins_skl[pin];
@@ -87,7 +96,9 @@ bool intel_gmbus_is_valid_pin(struct drm_i915_private
*dev_priv,
{
unsigned int size;
- if (IS_GEN9_LP(dev_priv))
+ if (HAS_PCH_CNP(dev_priv))
+ size = ARRAY_SIZE(gmbus_pins_cnp);
+ else if (IS_GEN9_LP(dev_priv))
size = ARRAY_SIZE(gmbus_pins_bxt);
else if (IS_GEN9_BC(dev_priv))
size = ARRAY_SIZE(gmbus_pins_skl);
--
2.7.4
--
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