lib/i915: Add intel_display_ver() and use it in display tests/libs

Display code should check the display version of the platform rather
than the graphics version; on some platforms these versions won't be the
same.

v2:
 - Continue to use intel_gen() in draw_rect_blt() since it's checking
   the version of the blitter engine (graphics) rather than the display
   version.  (Jose)
 - Rename some gen -> display_ver in kms_universal_plane too.  (Jose)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/intel_device_info.c b/lib/intel_device_info.c
index 4ab236e4..0c09f5cd 100644
--- a/lib/intel_device_info.c
+++ b/lib/intel_device_info.c
@@ -535,3 +535,17 @@ unsigned intel_gen(uint16_t devid)
 {
 	return intel_get_device_info(devid)->graphics_ver ?: -1u;
 }
+
+/**
+ * intel_display_ver:
+ * @devid: pci device id
+ *
+ * Computes the Intel GFX display version for the given device id.
+ *
+ * Returns:
+ * The display version on successful lookup, -1u on failure.
+ */
+unsigned intel_display_ver(uint16_t devid)
+{
+	return intel_get_device_info(devid)->display_ver ?: -1u;
+}