On VLV/BYT, backlight controls a per-pipe, so when adjusting the
backlight we need to pass the correct info. So make the externally
visible backlight functions take a connector argument, which can be used
internally to figure out the pipe backlight to adjust.
v2: make connector pipe lookup check for NULL crtc (Jani)
fixup connector check in ASLE code (Jani)
v3: make sure we take the mode config lock around lookups (Daniel)
v4: fix double unlock in panel_get_brightness (Daniel)
v5: push ASLE work into a work queue (Daniel)
Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
---
drivers/gpu/drm/i915/i915_drv.h | 2 +
drivers/gpu/drm/i915/intel_display.c | 12 +++++
drivers/gpu/drm/i915/intel_dp.c | 5 +-
drivers/gpu/drm/i915/intel_drv.h | 8 +--
drivers/gpu/drm/i915/intel_lvds.c | 9 ++--
drivers/gpu/drm/i915/intel_opregion.c | 67 +++++++++++++++++++++----
drivers/gpu/drm/i915/intel_panel.c | 92 +++++++++++++++++++++++++----------
7 files changed, 151 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ed8653f..82eb027 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -54,6 +54,7 @@
#define DRIVER_DATE "20080730"
enum pipe {
+ INVALID_PIPE = -1,
PIPE_A = 0,
PIPE_B,
PIPE_C,
@@ -231,6 +232,7 @@ struct intel_opregion {
struct opregion_asle __iomem *asle;
void __iomem *vbt;
u32 __iomem *lid_state;
+ struct work_struct asle_work;
};
#define OPREGION_SIZE (8*1024)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 0ba0af4..53c4ea8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9729,6 +9729,18 @@ static void intel_crtc_init(struct drm_device *dev, int
pipe)
drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
}
+enum pipe intel_get_pipe_from_connector(struct intel_connector *connector)
+{
+ struct drm_encoder *encoder = connector->base.encoder;
+
+ WARN_ON(!mutex_is_locked(&connector->base.dev->mode_config.mutex));
+
+ if (!encoder)
+ return INVALID_PIPE;
+
+ return to_intel_crtc(encoder->crtc)->pipe;
+}
+
int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
struct drm_file *file)
{
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 0ed7717..6391c7d 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1257,7 +1257,6 @@ void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = intel_dig_port->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
- int pipe = to_intel_crtc(intel_dig_port->base.base.crtc)->pipe;
u32 pp;
u32 pp_ctrl_reg;
@@ -1280,7 +1279,7 @@ void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
I915_WRITE(pp_ctrl_reg, pp);
POSTING_READ(pp_ctrl_reg);
- intel_panel_enable_backlight(dev, pipe);
+ intel_panel_enable_backlight(intel_dp->attached_connector);
}
void ironlake_edp_backlight_off(struct intel_dp *intel_dp)
@@ -1293,7 +1292,7 @@ void ironlake_edp_backlight_off(struct intel_dp *intel_dp)
if (!is_edp(intel_dp))
return;
- intel_panel_disable_backlight(dev);
+ intel_panel_disable_backlight(intel_dp->attached_connector);
DRM_DEBUG_KMS("\n");
pp = ironlake_get_pp_control(intel_dp);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 922c5d7..476d98b 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -619,6 +619,7 @@ void intel_connector_attach_encoder(struct intel_connector
*connector,
struct drm_encoder *intel_best_encoder(struct drm_connector *connector);
struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
struct drm_crtc *crtc);
+enum pipe intel_get_pipe_from_connector(struct intel_connector *connector);
int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
struct drm_file *file_priv);
enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
@@ -767,10 +768,11 @@ void intel_pch_panel_fitting(struct intel_crtc *crtc,
void intel_gmch_panel_fitting(struct intel_crtc *crtc,
struct intel_crtc_config *pipe_config,
int fitting_mode);
-void intel_panel_set_backlight(struct drm_device *dev, u32 level, u32 max);
+void intel_panel_set_backlight(struct intel_connector *connector, u32 level,
+ u32 max);
int intel_panel_setup_backlight(struct drm_connector *connector);
-void intel_panel_enable_backlight(struct drm_device *dev, enum pipe pipe);
-void intel_panel_disable_backlight(struct drm_device *dev);
+void intel_panel_enable_backlight(struct intel_connector *connector);
+void intel_panel_disable_backlight(struct intel_connector *connector);
void intel_panel_destroy_backlight(struct drm_device *dev);
enum drm_connector_status intel_panel_detect(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/intel_lvds.c
b/drivers/gpu/drm/i915/intel_lvds.c
index ae0c843..30933ab 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -206,7 +206,8 @@ static void intel_enable_lvds(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct intel_lvds_encoder *lvds_encoder =
to_lvds_encoder(&encoder->base);
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
+ struct intel_connector *intel_connector =
+ &lvds_encoder->attached_connector->base;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 ctl_reg, stat_reg;
@@ -225,13 +226,15 @@ static void intel_enable_lvds(struct intel_encoder
*encoder)
if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
DRM_ERROR("timed out waiting for panel to power on\n");
- intel_panel_enable_backlight(dev, intel_crtc->pipe);
+ intel_panel_enable_backlight(intel_connector);
}
static void intel_disable_lvds(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct intel_lvds_encoder *lvds_encoder =
to_lvds_encoder(&encoder->base);
+ struct intel_connector *intel_connector =
+ &lvds_encoder->attached_connector->base;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 ctl_reg, stat_reg;
@@ -243,7 +246,7 @@ static void intel_disable_lvds(struct intel_encoder
*encoder)
stat_reg = PP_STATUS;
}
- intel_panel_disable_backlight(dev);
+ intel_panel_disable_backlight(intel_connector);
I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
diff --git a/drivers/gpu/drm/i915/intel_opregion.c
b/drivers/gpu/drm/i915/intel_opregion.c
index 2acf5ca..85bc3b1 100644
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -391,24 +391,71 @@ int intel_opregion_notify_adapter(struct drm_device *dev,
pci_power_t state)
return -EINVAL;
}
-static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
+static void asle_backlight_work(struct work_struct *work)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_opregion *opregion = container_of(work,
+ struct intel_opregion,
+ asle_work);
+ struct drm_i915_private *dev_priv = container_of(opregion,
+ struct
drm_i915_private,
+ opregion);
+ struct drm_device *dev = dev_priv->dev;
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+ struct intel_connector *intel_connector = NULL;
+ struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[0];
struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
+ u32 bclp, ret = 0;
+ bool found = false;
+
+ bclp = ioread32(&asle->bclp);
DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
- if (!(bclp & ASLE_BCLP_VALID))
- return ASLC_BACKLIGHT_FAILED;
+ if (!(bclp & ASLE_BCLP_VALID)) {
+ ret = ASLC_BACKLIGHT_FAILED;
+ goto out;
+ }
bclp &= ASLE_BCLP_MSK;
- if (bclp > 255)
- return ASLC_BACKLIGHT_FAILED;
+ if (bclp > 255) {
+ ret = ASLC_BACKLIGHT_FAILED;
+ goto out;
+ }
- intel_panel_set_backlight(dev, bclp, 255);
+ mutex_lock(&dev->mode_config.mutex);
+ /*
+ * Could match the OpRegion connector here instead, but we'd
+ * also need to verify the connector could handle a backlight
+ * call.
+ */
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
+ if (encoder->crtc == crtc) {
+ found = true;
+ break;
+ }
+
+ if (!found) {
+ ret = ASLC_BACKLIGHT_FAILED;
+ goto out_unlock;
+ }
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ if (connector->encoder == encoder)
+ intel_connector = to_intel_connector(connector);
+
+ if (!intel_connector) {
+ ret = ASLC_BACKLIGHT_FAILED;
+ goto out_unlock;
+ }
+
+ intel_panel_set_backlight(intel_connector, bclp, 255);
iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
- return 0;
+out_unlock:
+ mutex_unlock(&dev->mode_config.mutex);
+out:
+ iowrite32(ret, &asle->aslc);
}
static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
@@ -505,7 +552,7 @@ void intel_opregion_asle_intr(struct drm_device *dev)
aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
if (aslc_req & ASLC_SET_BACKLIGHT)
- aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
+ schedule_work(&dev_priv->opregion.asle_work);
if (aslc_req & ASLC_SET_PFIT)
aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
@@ -825,6 +872,8 @@ int intel_opregion_setup(struct drm_device *dev)
return -ENOTSUPP;
}
+ INIT_WORK(&opregion->asle_work, asle_backlight_work);
+
base = acpi_os_ioremap(asls, OPREGION_SIZE);
if (!base)
return -ENOMEM;
diff --git a/drivers/gpu/drm/i915/intel_panel.c
b/drivers/gpu/drm/i915/intel_panel.c
index 5468416..86d1ee9 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -341,7 +341,7 @@ static int is_backlight_combination_mode(struct drm_device
*dev)
/* XXX: query mode clock or hardware clock and program max PWM appropriately
* when it's 0.
*/
-static u32 i915_read_blc_pwm_ctl(struct drm_device *dev)
+static u32 i915_read_blc_pwm_ctl(struct drm_device *dev, enum pipe pipe)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 val;
@@ -380,11 +380,12 @@ static u32 i915_read_blc_pwm_ctl(struct drm_device *dev)
return val;
}
-static u32 intel_panel_get_max_backlight(struct drm_device *dev)
+static u32 intel_panel_get_max_backlight(struct drm_device *dev,
+ enum pipe pipe)
{
u32 max;
- max = i915_read_blc_pwm_ctl(dev);
+ max = i915_read_blc_pwm_ctl(dev, pipe);
if (HAS_PCH_SPLIT(dev)) {
max >>= 16;
@@ -410,7 +411,8 @@ MODULE_PARM_DESC(invert_brightness, "Invert backlight
brightness "
"to dri-de...@lists.freedesktop.org, if your machine needs it. "
"It will then be included in an upcoming module version.");
module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600);
-static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val)
+static u32 intel_panel_compute_brightness(struct drm_device *dev,
+ enum pipe pipe, u32 val)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -419,7 +421,7 @@ static u32 intel_panel_compute_brightness(struct drm_device
*dev, u32 val)
if (i915_panel_invert_brightness > 0 ||
dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
- u32 max = intel_panel_get_max_backlight(dev);
+ u32 max = intel_panel_get_max_backlight(dev, pipe);
if (max)
return max - val;
}
@@ -427,7 +429,8 @@ static u32 intel_panel_compute_brightness(struct drm_device
*dev, u32 val)
return val;
}
-static u32 intel_panel_get_backlight(struct drm_device *dev)
+static u32 intel_panel_get_backlight(struct drm_device *dev,
+ enum pipe pipe)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 val;
@@ -450,7 +453,7 @@ static u32 intel_panel_get_backlight(struct drm_device *dev)
}
}
- val = intel_panel_compute_brightness(dev, val);
+ val = intel_panel_compute_brightness(dev, pipe, val);
spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
@@ -466,19 +469,19 @@ static void intel_pch_panel_set_backlight(struct
drm_device *dev, u32 level)
}
static void intel_panel_actually_set_backlight(struct drm_device *dev,
- u32 level)
+ enum pipe pipe, u32 level)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 tmp;
DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
- level = intel_panel_compute_brightness(dev, level);
+ level = intel_panel_compute_brightness(dev, pipe, level);
if (HAS_PCH_SPLIT(dev))
return intel_pch_panel_set_backlight(dev, level);
if (is_backlight_combination_mode(dev)) {
- u32 max = intel_panel_get_max_backlight(dev);
+ u32 max = intel_panel_get_max_backlight(dev, pipe);
u8 lbpc;
/* we're screwed, but keep behaviour backwards compatible */
@@ -498,15 +501,21 @@ static void intel_panel_actually_set_backlight(struct
drm_device *dev,
}
/* set backlight brightness to level in range [0..max] */
-void intel_panel_set_backlight(struct drm_device *dev, u32 level, u32 max)
+void intel_panel_set_backlight(struct intel_connector *connector, u32 level,
+ u32 max)
{
+ struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
+ enum pipe pipe = intel_get_pipe_from_connector(connector);
u32 freq;
unsigned long flags;
+ if (pipe == INVALID_PIPE)
+ return;
+
spin_lock_irqsave(&dev_priv->backlight.lock, flags);
- freq = intel_panel_get_max_backlight(dev);
+ freq = intel_panel_get_max_backlight(dev, pipe);
if (!freq) {
/* we are screwed, bail out */
goto out;
@@ -523,16 +532,21 @@ void intel_panel_set_backlight(struct drm_device *dev,
u32 level, u32 max)
dev_priv->backlight.device->props.brightness = level;
if (dev_priv->backlight.enabled)
- intel_panel_actually_set_backlight(dev, level);
+ intel_panel_actually_set_backlight(dev, pipe, level);
out:
spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
}
-void intel_panel_disable_backlight(struct drm_device *dev)
+void intel_panel_disable_backlight(struct intel_connector *connector)
{
+ struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
+ enum pipe pipe = intel_get_pipe_from_connector(connector);
unsigned long flags;
+ if (pipe == INVALID_PIPE)
+ return;
+
/*
* Do not disable backlight on the vgaswitcheroo path. When switching
* away from i915, the other client may depend on i915 to handle the
@@ -547,7 +561,7 @@ void intel_panel_disable_backlight(struct drm_device *dev)
spin_lock_irqsave(&dev_priv->backlight.lock, flags);
dev_priv->backlight.enabled = false;
- intel_panel_actually_set_backlight(dev, 0);
+ intel_panel_actually_set_backlight(dev, pipe, 0);
if (INTEL_INFO(dev)->gen >= 4) {
uint32_t reg, tmp;
@@ -566,18 +580,23 @@ void intel_panel_disable_backlight(struct drm_device *dev)
spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
}
-void intel_panel_enable_backlight(struct drm_device *dev,
- enum pipe pipe)
+void intel_panel_enable_backlight(struct intel_connector *connector)
{
+ struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
+ enum pipe pipe = intel_get_pipe_from_connector(connector);
enum transcoder cpu_transcoder =
intel_pipe_to_cpu_transcoder(dev_priv, pipe);
unsigned long flags;
+ if (pipe == INVALID_PIPE)
+ return;
+
spin_lock_irqsave(&dev_priv->backlight.lock, flags);
if (dev_priv->backlight.level == 0) {
- dev_priv->backlight.level = intel_panel_get_max_backlight(dev);
+ dev_priv->backlight.level = intel_panel_get_max_backlight(dev,
+ pipe);
if (dev_priv->backlight.device)
dev_priv->backlight.device->props.brightness =
dev_priv->backlight.level;
@@ -627,7 +646,8 @@ set_level:
* registers are set.
*/
dev_priv->backlight.enabled = true;
- intel_panel_actually_set_backlight(dev, dev_priv->backlight.level);
+ intel_panel_actually_set_backlight(dev, pipe,
+ dev_priv->backlight.level);
spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
}
@@ -650,7 +670,7 @@ static void intel_panel_init_backlight(struct drm_device
*dev)
intel_panel_init_backlight_regs(dev);
- dev_priv->backlight.level = intel_panel_get_backlight(dev);
+ dev_priv->backlight.level = intel_panel_get_backlight(dev, 0);
dev_priv->backlight.enabled = dev_priv->backlight.level != 0;
}
@@ -679,16 +699,34 @@ intel_panel_detect(struct drm_device *dev)
#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
static int intel_panel_update_status(struct backlight_device *bd)
{
- struct drm_device *dev = bl_get_data(bd);
- intel_panel_set_backlight(dev, bd->props.brightness,
+ struct intel_connector *connector = bl_get_data(bd);
+ struct drm_device *dev = connector->base.dev;
+
+ mutex_lock(&dev->mode_config.mutex);
+ intel_panel_set_backlight(connector, bd->props.brightness,
bd->props.max_brightness);
+ mutex_unlock(&dev->mode_config.mutex);
return 0;
}
static int intel_panel_get_brightness(struct backlight_device *bd)
{
- struct drm_device *dev = bl_get_data(bd);
- return intel_panel_get_backlight(dev);
+ struct intel_connector *connector = bl_get_data(bd);
+ struct drm_device *dev = connector->base.dev;
+ enum pipe pipe;
+ int ret = 0;
+
+ mutex_lock(&dev->mode_config.mutex);
+ pipe = intel_get_pipe_from_connector(connector);
+ mutex_unlock(&dev->mode_config.mutex);
+ if (pipe == INVALID_PIPE) {
+ ret = 0;
+ goto out;
+ }
+
+ ret = intel_panel_get_backlight(connector->base.dev, pipe);
+out:
+ return ret;
}
static const struct backlight_ops intel_panel_bl_ops = {
@@ -708,12 +746,13 @@ int intel_panel_setup_backlight(struct drm_connector
*connector)
if (WARN_ON(dev_priv->backlight.device))
return -ENODEV;
+ /* Just create a device for pipe 0 */
memset(&props, 0, sizeof(props));
props.type = BACKLIGHT_RAW;
props.brightness = dev_priv->backlight.level;
spin_lock_irqsave(&dev_priv->backlight.lock, flags);
- props.max_brightness = intel_panel_get_max_backlight(dev);
+ props.max_brightness = intel_panel_get_max_backlight(dev, 0);
spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
if (props.max_brightness == 0) {
@@ -722,7 +761,8 @@ int intel_panel_setup_backlight(struct drm_connector
*connector)
}
dev_priv->backlight.device =
backlight_device_register("intel_backlight",
- &connector->kdev, dev,
+ &connector->kdev,
+ to_intel_connector(connector),
&intel_panel_bl_ops, &props);
if (IS_ERR(dev_priv->backlight.device)) {
--
1.8.3.1
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