From 64a8fc0145a1d0fdc25fc9367c2e6c621955fb3b Mon Sep 17 00:00:00 2001
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu, 22 Sep 2011 11:16:00 +0530
Subject: [PATCH] drm/i915: fix ILK+ infoframe support
Misc fixes based on tests with an infoframe analyzer:
- checksum *does* include header bytes
- DIP enable & AVI infoframe are tied together in hw, so disable both
and make sure AVI frames are enabled first
- use every vsync flag for SPD frames to avoid reserved value in
frequency field when enabling both AVI & SPD
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=40281.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: stable@kernel.org
Signed-off-by: Keith Packard <keithp@keithp.com>
---
drivers/gpu/drm/i915/intel_hdmi.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index e7e716cb1c99..d4f5a0b2120d 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -69,8 +69,7 @@ void intel_dip_infoframe_csum(struct dip_infoframe *frame)
frame->checksum = 0;
frame->ecc = 0;
- /* Header isn't part of the checksum */
- for (i = 5; i < frame->len; i++)
+ for (i = 0; i < frame->len + DIP_HEADER_SIZE; i++)
sum += data[i];
frame->checksum = 0x100 - sum;
@@ -104,7 +103,7 @@ static u32 intel_infoframe_flags(struct dip_infoframe *frame)
flags |= VIDEO_DIP_ENABLE_AVI | VIDEO_DIP_FREQ_VSYNC;
break;
case DIP_TYPE_SPD:
- flags |= VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_FREQ_2VSYNC;
+ flags |= VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_FREQ_VSYNC;
break;
default:
DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
@@ -165,9 +164,9 @@ static void ironlake_write_infoframe(struct drm_encoder *encoder,
flags = intel_infoframe_index(frame);
- val &= ~VIDEO_DIP_SELECT_MASK;
+ val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
- I915_WRITE(reg, val | flags);
+ I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
for (i = 0; i < len; i += 4) {
I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
@@ -487,6 +486,7 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
struct intel_encoder *intel_encoder;
struct intel_connector *intel_connector;
struct intel_hdmi *intel_hdmi;
+ int i;
intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
if (!intel_hdmi)
@@ -539,10 +539,14 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
intel_hdmi->sdvox_reg = sdvox_reg;
- if (!HAS_PCH_SPLIT(dev))
+ if (!HAS_PCH_SPLIT(dev)) {
intel_hdmi->write_infoframe = i9xx_write_infoframe;
- else
+ I915_WRITE(VIDEO_DIP_CTL, 0);
+ } else {
intel_hdmi->write_infoframe = ironlake_write_infoframe;
+ for_each_pipe(i)
+ I915_WRITE(TVIDEO_DIP_CTL(i), 0);
+ }
drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);