drm/i915: make DBLCLK modes work
They require an AVI InfoFrame with a proper Pixel Repetition field.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45729
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 3205a77..d9ffe38 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -234,6 +234,8 @@
#define DIP_TYPE_AVI 0x82
#define DIP_VERSION_AVI 0x2
#define DIP_LEN_AVI 13
+#define DIP_AVI_PR_1 0
+#define DIP_AVI_PR_2 1
#define DIP_TYPE_SPD 0x83
#define DIP_VERSION_SPD 0x1
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 7de2d3b..8d25017 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -220,7 +220,8 @@
intel_hdmi->write_infoframe(encoder, frame);
}
-static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
+static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
+ struct drm_display_mode *adjusted_mode)
{
struct dip_infoframe avi_if = {
.type = DIP_TYPE_AVI,
@@ -228,6 +229,9 @@
.len = DIP_LEN_AVI,
};
+ if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
+ avi_if.body.avi.YQ_CN_PR |= DIP_AVI_PR_2;
+
intel_set_infoframe(encoder, &avi_if);
}
@@ -290,7 +294,7 @@
I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
POSTING_READ(intel_hdmi->sdvox_reg);
- intel_hdmi_set_avi_infoframe(encoder);
+ intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
intel_hdmi_set_spd_infoframe(encoder);
}