[PATCH 41/81] drm/i915/dvo: implement get_hw_state

Daniel Vetter
2012-07-11T15:36:04Z

Similar to the sdvo code we poke the dvo encoder whether the output is
active. Safe that dvo encoders are not standardized, so this requires
a new callback into the dvo chip driver.

Hence implement that for all 5 dvo drivers.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/dvo.h | 6 ++++++
drivers/gpu/drm/i915/dvo_ch7017.c | 13 +++++++++++++
drivers/gpu/drm/i915/dvo_ch7xxx.c | 13 +++++++++++++
drivers/gpu/drm/i915/dvo_ivch.c | 15 +++++++++++++++
drivers/gpu/drm/i915/dvo_sil164.c | 16 ++++++++++++++++
drivers/gpu/drm/i915/dvo_tfp410.c | 14 ++++++++++++++
drivers/gpu/drm/i915/intel_dvo.c | 27 +++++++++++++++++++++++++++
7 files changed, 104 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/dvo.h b/drivers/gpu/drm/i915/dvo.h
index 8efec6d..0ccda16 100644
--- a/drivers/gpu/drm/i915/dvo.h
+++ b/drivers/gpu/drm/i915/dvo.h
@@ -114,6 +114,12 @@ struct intel_dvo_dev_ops {
*/
enum drm_connector_status (*detect)(struct intel_dvo_device *dvo);

+ /*
+ * Probe the current hw status, returning true if the connected output
+ * is active.
+ */
+ bool (*get_hw_state)(struct intel_dvo_device *dev);
+
/**
* Query the device for the modes it provides.
*
diff --git a/drivers/gpu/drm/i915/dvo_ch7017.c b/drivers/gpu/drm/i915/dvo_ch7017.c
index 71e7650..86b27d1 100644
--- a/drivers/gpu/drm/i915/dvo_ch7017.c
+++ b/drivers/gpu/drm/i915/dvo_ch7017.c
@@ -359,6 +359,18 @@ static void ch7017_dpms(struct intel_dvo_device *dvo, bool enable)
msleep(20);
}

+static bool ch7017_get_hw_state(struct intel_dvo_device *dvo)
+{
+ uint8_t val;
+
+ ch7017_read(dvo, CH7017_LVDS_POWER_DOWN, &val);
+
+ if (val & CH7017_LVDS_POWER_DOWN_EN)
+ return false;
+ else
+ return true;
+}
+
static void ch7017_dump_regs(struct intel_dvo_device *dvo)
{
uint8_t val;
@@ -396,6 +408,7 @@ struct intel_dvo_dev_ops ch7017_ops = {
.mode_valid = ch7017_mode_valid,
.mode_set = ch7017_mode_set,
.dpms = ch7017_dpms,
+ .get_hw_state = ch7017_get_hw_state,
.dump_regs = ch7017_dump_regs,
.destroy = ch7017_destroy,
};
diff --git a/drivers/gpu/drm/i915/dvo_ch7xxx.c b/drivers/gpu/drm/i915/dvo_ch7xxx.c
index c1dea5b..38f3a6c 100644
--- a/drivers/gpu/drm/i915/dvo_ch7xxx.c
+++ b/drivers/gpu/drm/i915/dvo_ch7xxx.c
@@ -297,6 +297,18 @@ static void ch7xxx_dpms(struct intel_dvo_device *dvo, bool enable)
ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD);
}

+static bool ch7xxx_get_hw_state(struct intel_dvo_device *dvo)
+{
+ u8 val;
+
+ ch7xxx_readb(dvo, CH7xxx_PM, &val);
+
+ if (val & CH7xxx_PM_FPD)
+ return false;
+ else
+ return true;
+}
+
static void ch7xxx_dump_regs(struct intel_dvo_device *dvo)
{
int i;
@@ -326,6 +338,7 @@ struct intel_dvo_dev_ops ch7xxx_ops = {
.mode_valid = ch7xxx_mode_valid,
.mode_set = ch7xxx_mode_set,
.dpms = ch7xxx_dpms,
+ .get_hw_state = ch7xxx_get_hw_state,
.dump_regs = ch7xxx_dump_regs,
.destroy = ch7xxx_destroy,
};
diff --git a/drivers/gpu/drm/i915/dvo_ivch.c b/drivers/gpu/drm/i915/dvo_ivch.c
index fa8ff6b..baaf65b 100644
--- a/drivers/gpu/drm/i915/dvo_ivch.c
+++ b/drivers/gpu/drm/i915/dvo_ivch.c
@@ -323,6 +323,20 @@ static void ivch_dpms(struct intel_dvo_device *dvo, bool enable)
udelay(16 * 1000);
}

+static bool ivch_get_hw_state(struct intel_dvo_device *dvo)
+{
+ uint16_t vr01;
+
+ /* Set the new power state of the panel. */
+ if (!ivch_read(dvo, VR01, &vr01))
+ return false;
+
+ if (vr01 & VR01_LCD_ENABLE)
+ return true;
+ else
+ return false;
+}
+
static void ivch_mode_set(struct intel_dvo_device *dvo,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
@@ -413,6 +427,7 @@ static void ivch_destroy(struct intel_dvo_device *dvo)
struct intel_dvo_dev_ops ivch_ops = {
.init = ivch_init,
.dpms = ivch_dpms,
+ .get_hw_state = ivch_get_hw_state,
.mode_valid = ivch_mode_valid,
.mode_set = ivch_mode_set,
.detect = ivch_detect,
diff --git a/drivers/gpu/drm/i915/dvo_sil164.c b/drivers/gpu/drm/i915/dvo_sil164.c
index cc24c1c..4debd32 100644
--- a/drivers/gpu/drm/i915/dvo_sil164.c
+++ b/drivers/gpu/drm/i915/dvo_sil164.c
@@ -226,6 +226,21 @@ static void sil164_dpms(struct intel_dvo_device *dvo, bool enable)
return;
}

+static bool sil164_get_hw_state(struct intel_dvo_device *dvo)
+{
+ int ret;
+ unsigned char ch;
+
+ ret = sil164_readb(dvo, SIL164_REG8, &ch);
+ if (ret == false)
+ return false;
+
+ if (ch & SIL164_8_PD)
+ return true;
+ else
+ return false;
+}
+
static void sil164_dump_regs(struct intel_dvo_device *dvo)
{
uint8_t val;
@@ -258,6 +273,7 @@ struct intel_dvo_dev_ops sil164_ops = {
.mode_valid = sil164_mode_valid,
.mode_set = sil164_mode_set,
.dpms = sil164_dpms,
+ .get_hw_state = sil164_get_hw_state,
.dump_regs = sil164_dump_regs,
.destroy = sil164_destroy,
};
diff --git a/drivers/gpu/drm/i915/dvo_tfp410.c b/drivers/gpu/drm/i915/dvo_tfp410.c
index 097b3e8..e17f1b0 100644
--- a/drivers/gpu/drm/i915/dvo_tfp410.c
+++ b/drivers/gpu/drm/i915/dvo_tfp410.c
@@ -249,6 +249,19 @@ static void tfp410_dpms(struct intel_dvo_device *dvo, bool enable)
tfp410_writeb(dvo, TFP410_CTL_1, ctl1);
}

+static bool tfp410_get_hw_state(struct intel_dvo_device *dvo)
+{
+ uint8_t ctl1;
+
+ if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1))
+ return false;
+
+ if (ctl1 & TFP410_CTL_1_PD)
+ return true;
+ else
+ return false;
+}
+
static void tfp410_dump_regs(struct intel_dvo_device *dvo)
{
uint8_t val, val2;
@@ -299,6 +312,7 @@ struct intel_dvo_dev_ops tfp410_ops = {
.mode_valid = tfp410_mode_valid,
.mode_set = tfp410_mode_set,
.dpms = tfp410_dpms,
+ .get_hw_state = tfp410_get_hw_state,
.dump_regs = tfp410_dump_regs,
.destroy = tfp410_destroy,
};
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 34cbe8c..88dd005 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -97,6 +97,31 @@ static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
struct intel_dvo, base);
}

+static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
+{
+ struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base);
+
+ return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
+}
+
+static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
+ enum pipe *pipe)
+{
+ struct drm_device *dev = encoder->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
+ u32 tmp;
+
+ tmp = I915_READ(intel_dvo->dev.dvo_reg);
+
+ if (!(tmp & DVO_ENABLE))
+ return false;
+
+ *pipe = PORT_TO_PIPE(tmp);
+
+ return true;
+}
+
static void intel_disable_dvo(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@@ -406,6 +431,8 @@ void intel_dvo_init(struct drm_device *dev)

intel_encoder->disable = intel_disable_dvo;
intel_encoder->enable = intel_enable_dvo;
+ intel_encoder->get_hw_state = intel_dvo_get_hw_state;
+ intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;

/* Now, try to find a controller */
for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
--
1.7.7.6