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drm/i915/vlv: use per-pipe backlight controls v2

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With the connector and pipe passed around, we can now set the backlight
on the right pipe on VLV/BYT.

v2: drop combination mode check for VLV (Jani)
    add save/restore code for VLV backlight regs (Jani)
    check for existing modulation freq when initializing backlight regs (Jani)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67245
Tested-by: Joe Konno <joe.konno@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes
2013-10-31 18:55:50 +02:00
committed by Daniel Vetter
parent 752aa88a1e
commit 07bf139b90
4 changed files with 102 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
drivers/gpu/drm/i915/intel_panel.c
View File

@@ -358,6 +358,21 @@ static u32 i915_read_blc_pwm_ctl(struct drm_device *dev, enum pipe pipe)
val = dev_priv->regfile.saveBLC_PWM_CTL2;
I915_WRITE(BLC_PWM_PCH_CTL2, val);
}
} else if (IS_VALLEYVIEW(dev)) {
val = I915_READ(VLV_BLC_PWM_CTL(pipe));
if (dev_priv->regfile.saveBLC_PWM_CTL == 0) {
dev_priv->regfile.saveBLC_PWM_CTL = val;
dev_priv->regfile.saveBLC_PWM_CTL2 =
I915_READ(VLV_BLC_PWM_CTL2(pipe));
} else if (val == 0) {
val = dev_priv->regfile.saveBLC_PWM_CTL;
I915_WRITE(VLV_BLC_PWM_CTL(pipe), val);
I915_WRITE(VLV_BLC_PWM_CTL2(pipe),
dev_priv->regfile.saveBLC_PWM_CTL2);
}
if (!val)
val = 0x0f42ffff;
} else {
val = I915_READ(BLC_PWM_CTL);
if (dev_priv->regfile.saveBLC_PWM_CTL == 0) {
@@ -372,9 +387,6 @@ static u32 i915_read_blc_pwm_ctl(struct drm_device *dev, enum pipe pipe)
I915_WRITE(BLC_PWM_CTL2,
dev_priv->regfile.saveBLC_PWM_CTL2);
}
if (IS_VALLEYVIEW(dev) && !val)
val = 0x0f42ffff;
}
return val;
@@ -435,13 +447,19 @@ static u32 intel_panel_get_backlight(struct drm_device *dev,
struct drm_i915_private *dev_priv = dev->dev_private;
u32 val;
unsigned long flags;
int reg;
spin_lock_irqsave(&dev_priv->backlight.lock, flags);
if (HAS_PCH_SPLIT(dev)) {
val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
} else {
val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
if (IS_VALLEYVIEW(dev))
reg = VLV_BLC_PWM_CTL(pipe);
else
reg = BLC_PWM_CTL;
val = I915_READ(reg) & BACKLIGHT_DUTY_CYCLE_MASK;
if (INTEL_INFO(dev)->gen < 4)
val >>= 1;
@@ -473,6 +491,7 @@ static void intel_panel_actually_set_backlight(struct drm_device *dev,
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 tmp;
int reg;
DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
level = intel_panel_compute_brightness(dev, pipe, level);
@@ -493,11 +512,16 @@ static void intel_panel_actually_set_backlight(struct drm_device *dev,
pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
}
tmp = I915_READ(BLC_PWM_CTL);
if (IS_VALLEYVIEW(dev))
reg = VLV_BLC_PWM_CTL(pipe);
else
reg = BLC_PWM_CTL;
tmp = I915_READ(reg);
if (INTEL_INFO(dev)->gen < 4)
level <<= 1;
tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
I915_WRITE(BLC_PWM_CTL, tmp | level);
I915_WRITE(reg, tmp | level);
}
/* set backlight brightness to level in range [0..max] */
@@ -566,7 +590,12 @@ void intel_panel_disable_backlight(struct intel_connector *connector)
if (INTEL_INFO(dev)->gen >= 4) {
uint32_t reg, tmp;
reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2;
if (HAS_PCH_SPLIT(dev))
reg = BLC_PWM_CPU_CTL2;
else if (IS_VALLEYVIEW(dev))
reg = VLV_BLC_PWM_CTL2(pipe);
else
reg = BLC_PWM_CTL2;
I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE);
@@ -607,8 +636,12 @@ void intel_panel_enable_backlight(struct intel_connector *connector)
if (INTEL_INFO(dev)->gen >= 4) {
uint32_t reg, tmp;
reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2;
if (HAS_PCH_SPLIT(dev))
reg = BLC_PWM_CPU_CTL2;
else if (IS_VALLEYVIEW(dev))
reg = VLV_BLC_PWM_CTL2(pipe);
else
reg = BLC_PWM_CTL2;
tmp = I915_READ(reg);
@@ -660,9 +693,19 @@ static void intel_panel_init_backlight_regs(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
if (IS_VALLEYVIEW(dev)) {
u32 cur_val = I915_READ(BLC_PWM_CTL) &
BACKLIGHT_DUTY_CYCLE_MASK;
I915_WRITE(BLC_PWM_CTL, (0xf42 << 16) | cur_val);
enum pipe pipe;
for_each_pipe(pipe) {
u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(pipe));
/* Skip if the modulation freq is already set */
if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK)
continue;
cur_val &= BACKLIGHT_DUTY_CYCLE_MASK;
I915_WRITE(VLV_BLC_PWM_CTL(pipe), (0xf42 << 16) |
cur_val);
}
}
}