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drm/i915: IBX+ doesn't have separate vsync/hsync controls on the VGA DAC 

When the PCH split occurred, hw dropped support for separate hsync and
vsync disable in the VGA DAC.  So add a PCH specific DPMS function that
just uses the port enable bit for controlling DPMS states.

Before this fix, when anything other than a full DPMS off occurred,
the VGA port would be left enabled and scanning out while all the other
heads would turn off as expected.

v2: duplicate encoder helper vtable into pch and gmch versions (Daniel)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=48491
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: s/intel_crt_dpms/gmch_crt_dpms as suggested by Chris.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2012-04-17 15:06:33 -07:00 committed by Daniel Vetter
parent 446f254566
commit df0323c42a
1 changed files with 43 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/gpu/drm/i915/intel_crt.c
View File

@ -55,18 +55,36 @@ static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
struct intel_crt, base);
}
static void intel_crt_dpms(struct drm_encoder *encoder, int mode)
static void pch_crt_dpms(struct drm_encoder *encoder, int mode)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 temp, reg;
u32 temp;
if (HAS_PCH_SPLIT(dev))
reg = PCH_ADPA;
else
reg = ADPA;
temp = I915_READ(PCH_ADPA);
temp &= ~ADPA_DAC_ENABLE;
temp = I915_READ(reg);
switch (mode) {
case DRM_MODE_DPMS_ON:
temp |= ADPA_DAC_ENABLE;
break;
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND:
case DRM_MODE_DPMS_OFF:
/* Just leave port enable cleared */
break;
}
I915_WRITE(PCH_ADPA, temp);
}
static void gmch_crt_dpms(struct drm_encoder *encoder, int mode)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 temp;
temp = I915_READ(ADPA);
temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
temp &= ~ADPA_DAC_ENABLE;
@ -85,7 +103,7 @@ static void intel_crt_dpms(struct drm_encoder *encoder, int mode)
break;
}
I915_WRITE(reg, temp);
I915_WRITE(ADPA, temp);
}
static int intel_crt_mode_valid(struct drm_connector *connector,
@ -516,12 +534,20 @@ static void intel_crt_reset(struct drm_connector *connector)
* Routines for controlling stuff on the analog port
*/
static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = {
.dpms = intel_crt_dpms,
static const struct drm_encoder_helper_funcs pch_encoder_funcs = {
.mode_fixup = intel_crt_mode_fixup,
.prepare = intel_encoder_prepare,
.commit = intel_encoder_commit,
.mode_set = intel_crt_mode_set,
.dpms = pch_crt_dpms,
};
static const struct drm_encoder_helper_funcs gmch_encoder_funcs = {
.mode_fixup = intel_crt_mode_fixup,
.prepare = intel_encoder_prepare,
.commit = intel_encoder_commit,
.mode_set = intel_crt_mode_set,
.dpms = gmch_crt_dpms,
};
static const struct drm_connector_funcs intel_crt_connector_funcs = {
@ -567,6 +593,7 @@ void intel_crt_init(struct drm_device *dev)
struct intel_crt *crt;
struct intel_connector *intel_connector;
struct drm_i915_private *dev_priv = dev->dev_private;
const struct drm_encoder_helper_funcs *encoder_helper_funcs;
/* Skip machines without VGA that falsely report hotplug events */
if (dmi_check_system(intel_no_crt))
@ -602,7 +629,12 @@ void intel_crt_init(struct drm_device *dev)
connector->interlace_allowed = 1;
connector->doublescan_allowed = 0;
drm_encoder_helper_add(&crt->base.base, &intel_crt_helper_funcs);
if (HAS_PCH_SPLIT(dev))
encoder_helper_funcs = &pch_encoder_funcs;
else
encoder_helper_funcs = &gmch_encoder_funcs;
drm_encoder_helper_add(&crt->base.base, encoder_helper_funcs);
drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
drm_sysfs_connector_add(connector);