drm/i915/kbl: Fix DMC load on Kabylake.

Kabylake A0 is based on Skylake H0.

v2: Don't assume revid+7 and only load the one we are sure about.

v3: Rebase on top of latest changes.

v4: Accept cleaner solution from Jani with kbl_stepping_info
    starting on H0 instead of put a hack on revid.

Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449676319-6959-1-git-send-email-rodrigo.vivi@intel.com

diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
index 6c6a669..9bb63a8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -166,6 +166,14 @@ struct stepping_info {
        char substepping;
 };
 
+/*
+ * Kabylake derivated from Skylake H0, so SKL H0
+ * is the right firmware for KBL A0 (revid 0).
+ */
+static const struct stepping_info kbl_stepping_info[] = {
+       {'H', '0'}, {'I', '0'}
+};
+
 static const struct stepping_info skl_stepping_info[] = {
        {'A', '0'}, {'B', '0'}, {'C', '0'},
        {'D', '0'}, {'E', '0'}, {'F', '0'},
@@ -182,7 +190,10 @@ static const struct stepping_info *intel_get_stepping_info(struct drm_device *de
        const struct stepping_info *si;
        unsigned int size;
 
-       if (IS_SKYLAKE(dev)) {
+       if (IS_KABYLAKE(dev)) {
+               size = ARRAY_SIZE(kbl_stepping_info);
+               si = kbl_stepping_info;
+       } else if (IS_SKYLAKE(dev)) {
                size = ARRAY_SIZE(skl_stepping_info);
                si = skl_stepping_info;
        } else if (IS_BROXTON(dev)) {