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authorJesse Barnes <jbarnes@virtuousgeek.org>2011-10-11 17:43:02 (GMT)
committerKeith Packard <keithp@keithp.com>2011-10-21 06:21:56 (GMT)
commitd4270e57efe9e2536798c59e1ed2fd0a1e5cdfcf (patch)
tree7f274fbd8a757d08947c8633a79b9ad4c6f85cae /drivers/gpu
parentd64311ab4bd8d1c1e984ce3f0e772266dde95380 (diff)
downloadlinux-fsl-qoriq-d4270e57efe9e2536798c59e1ed2fd0a1e5cdfcf.tar.xz
drm/i915: export a CPT mode set verification function
At the point where we check, we can't do much about the failure, but it can aid debugging. Note that the auto-train override bit will be reset as part of normal mode setting with this patch if a pipe ever does get stuck, but that's consistent with the workaround for CPT provided by the hardware team. This patch helped catch the fact that the pipe wasn't running in the !composite sync FDI case on my IVB SDV, so has already shown to be useful. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Tested-By: Eugeni Dodonov <eugeni.dodonov@intel.com> Reviewed-By: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/intel_display.c25
-rw-r--r--drivers/gpu/drm/i915/intel_dp.c5
-rw-r--r--drivers/gpu/drm/i915/intel_drv.h2
3 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ed5d4f4..ad3a018 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2971,6 +2971,24 @@ static void ironlake_pch_enable(struct drm_crtc *crtc)
intel_enable_transcoder(dev_priv, pipe);
}
+void intel_cpt_verify_modeset(struct drm_device *dev, int pipe)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ int dslreg = PIPEDSL(pipe), tc2reg = TRANS_CHICKEN2(pipe);
+ u32 temp;
+
+ temp = I915_READ(dslreg);
+ udelay(500);
+ if (wait_for(I915_READ(dslreg) != temp, 5)) {
+ /* Without this, mode sets may fail silently on FDI */
+ I915_WRITE(tc2reg, TRANS_AUTOTRAIN_GEN_STALL_DIS);
+ udelay(250);
+ I915_WRITE(tc2reg, 0);
+ if (wait_for(I915_READ(dslreg) != temp, 5))
+ DRM_ERROR("mode set failed: pipe %d stuck\n", pipe);
+ }
+}
+
static void ironlake_crtc_enable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
@@ -3340,8 +3358,15 @@ void intel_encoder_prepare(struct drm_encoder *encoder)
void intel_encoder_commit(struct drm_encoder *encoder)
{
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
+ struct drm_device *dev = encoder->dev;
+ struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
+ struct intel_crtc *intel_crtc = to_intel_crtc(intel_encoder->base.crtc);
+
/* lvds has its own version of commit see intel_lvds_commit */
encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
+
+ if (HAS_PCH_CPT(dev))
+ intel_cpt_verify_modeset(dev, intel_crtc->pipe);
}
void intel_encoder_destroy(struct drm_encoder *encoder)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 3009d2a..74c8352 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1191,6 +1191,8 @@ static void intel_dp_prepare(struct drm_encoder *encoder)
static void intel_dp_commit(struct drm_encoder *encoder)
{
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+ struct drm_device *dev = encoder->dev;
+ struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.base.crtc);
ironlake_edp_panel_vdd_on(intel_dp);
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
@@ -1202,6 +1204,9 @@ static void intel_dp_commit(struct drm_encoder *encoder)
ironlake_edp_backlight_on(intel_dp);
intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
+
+ if (HAS_PCH_CPT(dev))
+ intel_cpt_verify_modeset(dev, intel_crtc->pipe);
}
static void
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 5829854..51b1d75 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -382,4 +382,6 @@ extern void intel_fb_restore_mode(struct drm_device *dev);
extern void intel_init_clock_gating(struct drm_device *dev);
extern void intel_write_eld(struct drm_encoder *encoder,
struct drm_display_mode *mode);
+extern void intel_cpt_verify_modeset(struct drm_device *dev, int pipe);
+
#endif /* __INTEL_DRV_H__ */