Merge branch 'bdw-fixes' into backlight-rework
Merge the bdw changes into the backlight rework branch so that we can
adapt the new code for bdw, too. This is a bit a mess, but doing this
another way would have delayed the merging of the backlight
refactoring. Mea culpa.
As discussed with Jani on irc only do bdw-specific callbacks for the
set/get methods and bake in the only other special-case into the pch
enable function.
Conflicts:
drivers/gpu/drm/i915/intel_panel.c
v2: Don't enable the PWM too early for bdw (Jani).
v3: Create new bdw_ functions for setup and enable - the rules change
sufficiently imo with the switch from controlling the pwm from the cpu
to controlling it completel from the pch to warrant this.
v4: Rip out unused pipe variable in bdw_enable_backlight (0-day
builder).
Tested-by: Ben Widawsky <ben@bwidawsk.net> (on bdw)
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index eadfe33..e480cf4 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -352,6 +352,14 @@
return val;
}
+static u32 bdw_get_backlight(struct intel_connector *connector)
+{
+ struct drm_device *dev = connector->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
+}
+
static u32 pch_get_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
@@ -414,6 +422,14 @@
return val;
}
+static void bdw_set_backlight(struct intel_connector *connector, u32 level)
+{
+ struct drm_device *dev = connector->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
+ I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
+}
+
static void pch_set_backlight(struct intel_connector *connector, u32 level)
{
struct drm_device *dev = connector->base.dev;
@@ -585,6 +601,38 @@
spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
}
+static void bdw_enable_backlight(struct intel_connector *connector)
+{
+ struct drm_device *dev = connector->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_panel *panel = &connector->panel;
+ u32 pch_ctl1, pch_ctl2;
+
+ pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
+ if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
+ DRM_DEBUG_KMS("pch backlight already enabled\n");
+ pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
+ I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
+ }
+
+ pch_ctl2 = panel->backlight.max << 16;
+ I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
+
+ pch_ctl1 = 0;
+ if (panel->backlight.active_low_pwm)
+ pch_ctl1 |= BLM_PCH_POLARITY;
+
+ /* BDW always uses the pch pwm controls. */
+ pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
+
+ I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
+ POSTING_READ(BLC_PWM_PCH_CTL1);
+ I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
+
+ /* This won't stick until the above enable. */
+ intel_panel_actually_set_backlight(connector, panel->backlight.level);
+}
+
static void pch_enable_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
@@ -626,6 +674,7 @@
pch_ctl1 = 0;
if (panel->backlight.active_low_pwm)
pch_ctl1 |= BLM_PCH_POLARITY;
+
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
POSTING_READ(BLC_PWM_PCH_CTL1);
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
@@ -869,6 +918,30 @@
* XXX: Query mode clock or hardware clock and program PWM modulation frequency
* appropriately when it's 0. Use VBT and/or sane defaults.
*/
+static int bdw_setup_backlight(struct intel_connector *connector)
+{
+ struct drm_device *dev = connector->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_panel *panel = &connector->panel;
+ u32 pch_ctl1, pch_ctl2, val;
+
+ pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
+ panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
+
+ pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
+ panel->backlight.max = pch_ctl2 >> 16;
+ if (!panel->backlight.max)
+ return -ENODEV;
+
+ val = bdw_get_backlight(connector);
+ panel->backlight.level = intel_panel_compute_brightness(connector, val);
+
+ panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&
+ panel->backlight.level != 0;
+
+ return 0;
+}
+
static int pch_setup_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
@@ -1036,7 +1109,13 @@
{
struct drm_i915_private *dev_priv = dev->dev_private;
- if (HAS_PCH_SPLIT(dev)) {
+ if (IS_BROADWELL(dev)) {
+ dev_priv->display.setup_backlight = bdw_setup_backlight;
+ dev_priv->display.enable_backlight = bdw_enable_backlight;
+ dev_priv->display.disable_backlight = pch_disable_backlight;
+ dev_priv->display.set_backlight = bdw_set_backlight;
+ dev_priv->display.get_backlight = bdw_get_backlight;
+ } else if (HAS_PCH_SPLIT(dev)) {
dev_priv->display.setup_backlight = pch_setup_backlight;
dev_priv->display.enable_backlight = pch_enable_backlight;
dev_priv->display.disable_backlight = pch_disable_backlight;