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drm/i915: Split pin mapping into per platform functions 

Cleanup the code. Map the pins in accordance to
individual platforms rather than according to ports.
Create separate functions for platforms.

v2:
 - Add missing condition for CoffeeLake. Make platform
 specific functions static. Add function
 i915_ddc_pin_mapping().

v3:
 - Rename functions to x_port_to_ddc_pin() which directly
   indicates the purpose. Correct default return values on CNP
   and BXT. Rename i915_port_to_ to g4x_port_to since that was
   the first platform to run this. Correct code style. (Paulo)

Sugested-by Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Clinton Taylor <clinton.a.taylor@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1502927114-24012-1-git-send-email-anusha.srivatsa@intel.com
This commit is contained in:
Anusha Srivatsa 2017-08-16 16:45:14 -07:00 committed by Paulo Zanoni
parent ab3595bc4f
commit cec3bb013a
1 changed files with 95 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

121
drivers/gpu/drm/i915/intel_hdmi.c
View File

@ -1843,6 +1843,93 @@ void intel_hdmi_handle_sink_scrambling(struct intel_encoder *encoder,
DRM_DEBUG_KMS("sink scrambling handled\n");
}
static u8 chv_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
{
u8 ddc_pin;
switch (port) {
case PORT_B:
ddc_pin = GMBUS_PIN_DPB;
break;
case PORT_C:
ddc_pin = GMBUS_PIN_DPC;
break;
case PORT_D:
ddc_pin = GMBUS_PIN_DPD_CHV;
break;
default:
MISSING_CASE(port);
ddc_pin = GMBUS_PIN_DPB;
break;
}
return ddc_pin;
}
static u8 bxt_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
{
u8 ddc_pin;
switch (port) {
case PORT_B:
ddc_pin = GMBUS_PIN_1_BXT;
break;
case PORT_C:
ddc_pin = GMBUS_PIN_2_BXT;
break;
default:
MISSING_CASE(port);
ddc_pin = GMBUS_PIN_1_BXT;
break;
}
return ddc_pin;
}
static u8 cnp_port_to_ddc_pin(struct drm_i915_private *dev_priv,
enum port port)
{
u8 ddc_pin;
switch (port) {
case PORT_B:
ddc_pin = GMBUS_PIN_1_BXT;
break;
case PORT_C:
ddc_pin = GMBUS_PIN_2_BXT;
break;
case PORT_D:
ddc_pin = GMBUS_PIN_4_CNP;
break;
default:
MISSING_CASE(port);
ddc_pin = GMBUS_PIN_1_BXT;
break;
}
return ddc_pin;
}
static u8 g4x_port_to_ddc_pin(struct drm_i915_private *dev_priv,
enum port port)
{
u8 ddc_pin;
switch (port) {
case PORT_B:
ddc_pin = GMBUS_PIN_DPB;
break;
case PORT_C:
ddc_pin = GMBUS_PIN_DPC;
break;
case PORT_D:
ddc_pin = GMBUS_PIN_DPD;
break;
default:
MISSING_CASE(port);
ddc_pin = GMBUS_PIN_DPB;
break;
}
return ddc_pin;
}
static u8 intel_hdmi_ddc_pin(struct drm_i915_private *dev_priv,
enum port port)
{
@ -1856,32 +1943,14 @@ static u8 intel_hdmi_ddc_pin(struct drm_i915_private *dev_priv,
return info->alternate_ddc_pin;
}
switch (port) {
case PORT_B:
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) || HAS_PCH_CNP(dev_priv))
ddc_pin = GMBUS_PIN_2_BXT;
else
ddc_pin = GMBUS_PIN_DPC;
break;
case PORT_D:
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;
break;
default:
MISSING_CASE(port);
ddc_pin = GMBUS_PIN_DPB;
break;
}
if (IS_CHERRYVIEW(dev_priv))
ddc_pin = chv_port_to_ddc_pin(dev_priv, port);
else if (IS_GEN9_LP(dev_priv))
ddc_pin = bxt_port_to_ddc_pin(dev_priv, port);
else if (HAS_PCH_CNP(dev_priv))
ddc_pin = cnp_port_to_ddc_pin(dev_priv, port);
else
ddc_pin = g4x_port_to_ddc_pin(dev_priv, port);
DRM_DEBUG_KMS("Using DDC pin 0x%x for port %c (platform default)\n",
ddc_pin, port_name(port));