diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_panel.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 72 |
1 files changed, 52 insertions, 20 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 96c65d77e886..be4b4d546fd9 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -841,7 +841,7 @@ static void lpt_enable_backlight(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; - u32 pch_ctl1, pch_ctl2; + u32 pch_ctl1, pch_ctl2, schicken; pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { @@ -850,6 +850,22 @@ static void lpt_enable_backlight(struct intel_connector *connector) I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); } + if (HAS_PCH_LPT(dev_priv)) { + schicken = I915_READ(SOUTH_CHICKEN2); + if (panel->backlight.alternate_pwm_increment) + schicken |= LPT_PWM_GRANULARITY; + else + schicken &= ~LPT_PWM_GRANULARITY; + I915_WRITE(SOUTH_CHICKEN2, schicken); + } else { + schicken = I915_READ(SOUTH_CHICKEN1); + if (panel->backlight.alternate_pwm_increment) + schicken |= SPT_PWM_GRANULARITY; + else + schicken &= ~SPT_PWM_GRANULARITY; + I915_WRITE(SOUTH_CHICKEN1, schicken); + } + pch_ctl2 = panel->backlight.max << 16; I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2); @@ -1242,10 +1258,10 @@ static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) */ static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; u32 mul; - if (I915_READ(SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY) + if (panel->backlight.alternate_pwm_increment) mul = 128; else mul = 16; @@ -1261,9 +1277,10 @@ static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; u32 mul, clock; - if (I915_READ(SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY) + if (panel->backlight.alternate_pwm_increment) mul = 16; else mul = 128; @@ -1414,6 +1431,13 @@ static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unus struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 pch_ctl1, pch_ctl2, val; + bool alt; + + if (HAS_PCH_LPT(dev_priv)) + alt = I915_READ(SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY; + else + alt = I915_READ(SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY; + panel->backlight.alternate_pwm_increment = alt; pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; @@ -1430,10 +1454,11 @@ static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unus panel->backlight.min = get_backlight_min_vbt(connector); val = lpt_get_backlight(connector); - panel->backlight.level = intel_panel_compute_brightness(connector, val); + val = intel_panel_compute_brightness(connector, val); + panel->backlight.level = clamp(val, panel->backlight.min, + panel->backlight.max); - panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) && - panel->backlight.level != 0; + panel->backlight.enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; return 0; } @@ -1459,11 +1484,13 @@ static int pch_setup_backlight(struct intel_connector *connector, enum pipe unus panel->backlight.min = get_backlight_min_vbt(connector); val = pch_get_backlight(connector); - panel->backlight.level = intel_panel_compute_brightness(connector, val); + val = intel_panel_compute_brightness(connector, val); + panel->backlight.level = clamp(val, panel->backlight.min, + panel->backlight.max); cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2); panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && - (pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0; + (pch_ctl1 & BLM_PCH_PWM_ENABLE); return 0; } @@ -1498,9 +1525,11 @@ static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unu panel->backlight.min = get_backlight_min_vbt(connector); val = i9xx_get_backlight(connector); - panel->backlight.level = intel_panel_compute_brightness(connector, val); + val = intel_panel_compute_brightness(connector, val); + panel->backlight.level = clamp(val, panel->backlight.min, + panel->backlight.max); - panel->backlight.enabled = panel->backlight.level != 0; + panel->backlight.enabled = val != 0; return 0; } @@ -1530,10 +1559,11 @@ static int i965_setup_backlight(struct intel_connector *connector, enum pipe unu panel->backlight.min = get_backlight_min_vbt(connector); val = i9xx_get_backlight(connector); - panel->backlight.level = intel_panel_compute_brightness(connector, val); + val = intel_panel_compute_brightness(connector, val); + panel->backlight.level = clamp(val, panel->backlight.min, + panel->backlight.max); - panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) && - panel->backlight.level != 0; + panel->backlight.enabled = ctl2 & BLM_PWM_ENABLE; return 0; } @@ -1562,10 +1592,11 @@ static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe panel->backlight.min = get_backlight_min_vbt(connector); val = _vlv_get_backlight(dev_priv, pipe); - panel->backlight.level = intel_panel_compute_brightness(connector, val); + val = intel_panel_compute_brightness(connector, val); + panel->backlight.level = clamp(val, panel->backlight.min, + panel->backlight.max); - panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) && - panel->backlight.level != 0; + panel->backlight.enabled = ctl2 & BLM_PWM_ENABLE; return 0; } @@ -1607,10 +1638,11 @@ bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) return -ENODEV; val = bxt_get_backlight(connector); - panel->backlight.level = intel_panel_compute_brightness(connector, val); + val = intel_panel_compute_brightness(connector, val); + panel->backlight.level = clamp(val, panel->backlight.min, + panel->backlight.max); - panel->backlight.enabled = (pwm_ctl & BXT_BLC_PWM_ENABLE) && - panel->backlight.level != 0; + panel->backlight.enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; return 0; } |