drm/i915/icl: introduce tc_port
Add and enum for TC ports and auxiliary functions to handle them.
Icelake brings a lot of registers and other things that only apply to
the TC ports and are indexed starting from 0, so having an enum for
tc_ports that starts at 0 really helps the indexing.
This patch is based on previous patches written by Dhinakaran Pandiyan
and Mahesh Kumar.
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Mahesh Kumar <mahesh1.kumar@intel.com>
Reviewed-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180522002558.29262-4-paulo.r.zanoni@intel.com
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 141ded5..17c590b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5869,6 +5869,22 @@ static void i9xx_pfit_enable(struct intel_crtc *crtc)
I915_WRITE(BCLRPAT(crtc->pipe), 0);
}
+bool intel_port_is_tc(struct drm_i915_private *dev_priv, enum port port)
+{
+ if (IS_ICELAKE(dev_priv))
+ return port >= PORT_C && port <= PORT_F;
+
+ return false;
+}
+
+enum tc_port intel_port_to_tc(struct drm_i915_private *dev_priv, enum port port)
+{
+ if (!intel_port_is_tc(dev_priv, port))
+ return PORT_TC_NONE;
+
+ return port - PORT_C;
+}
+
enum intel_display_power_domain intel_port_to_power_domain(enum port port)
{
switch (port) {