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drm/i915: Be sure to turn hsync/vsync back on at crt enable (v2) 

commit f40ebd6bcb
Author: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Date:   Tue Mar 5 14:24:48 2013 +0100

    drm/i915: Turn off hsync and vsync on ADPA when disabling crt

properly disabled the hsync/vsync logic at disable time, but neglected
to re-enable them at enable time.

v2: In the enable hook, restore the connector's expected DPMS level
instead of forcing ON.  Do this by stashing a back pointer to the
connector in the crt (suggested by danvet) since otherwise it's awkward
to look up.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Cc: stable@vger.kernel.org
[danvet: Added more verbose commit citation and cc: stable tag. Also,
make it compile. Then self-lart and try to assign the right pointer.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Adam Jackson 2013-03-25 15:40:05 -04:00 committed by Daniel Vetter
parent bd17381372
commit 637f44d24f
1 changed files with 17 additions and 23 deletions
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40
drivers/gpu/drm/i915/intel_crt.c
View File

@ -45,6 +45,9 @@
struct intel_crt {
struct intel_encoder base;
/* DPMS state is stored in the connector, which we need in the
* encoder's enable/disable callbacks */
struct intel_connector *connector;
bool force_hotplug_required;
u32 adpa_reg;
};
@ -81,29 +84,6 @@ static bool intel_crt_get_hw_state(struct intel_encoder *encoder,
return true;
}
static void intel_disable_crt(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_crt *crt = intel_encoder_to_crt(encoder);
u32 temp;
temp = I915_READ(crt->adpa_reg);
temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
temp &= ~ADPA_DAC_ENABLE;
I915_WRITE(crt->adpa_reg, temp);
}
static void intel_enable_crt(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_crt *crt = intel_encoder_to_crt(encoder);
u32 temp;
temp = I915_READ(crt->adpa_reg);
temp |= ADPA_DAC_ENABLE;
I915_WRITE(crt->adpa_reg, temp);
}
/* Note: The caller is required to filter out dpms modes not supported by the
* platform. */
static void intel_crt_set_dpms(struct intel_encoder *encoder, int mode)
@ -135,6 +115,19 @@ static void intel_crt_set_dpms(struct intel_encoder *encoder, int mode)
I915_WRITE(crt->adpa_reg, temp);
}
static void intel_disable_crt(struct intel_encoder *encoder)
{
intel_crt_set_dpms(encoder, DRM_MODE_DPMS_OFF);
}
static void intel_enable_crt(struct intel_encoder *encoder)
{
struct intel_crt *crt = intel_encoder_to_crt(encoder);
intel_crt_set_dpms(encoder, crt->connector->base.dpms);
}
static void intel_crt_dpms(struct drm_connector *connector, int mode)
{
struct drm_device *dev = connector->dev;
@ -746,6 +739,7 @@ void intel_crt_init(struct drm_device *dev)
}
connector = &intel_connector->base;
crt->connector = intel_connector;
drm_connector_init(dev, &intel_connector->base,
&intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);