diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_panel.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 1181 |
1 files changed, 1091 insertions, 90 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 92ff8f38527..12b02fe1d0a 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -28,50 +28,95 @@ * Chris Wilson <chris@chris-wilson.co.uk> */ -#include "intel_drv.h" +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -#define PCI_LBPC 0xf4 /* legacy/combination backlight modes */ +#include <linux/moduleparam.h> +#include "intel_drv.h" void -intel_fixed_panel_mode(struct drm_display_mode *fixed_mode, +intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, struct drm_display_mode *adjusted_mode) { - adjusted_mode->hdisplay = fixed_mode->hdisplay; - adjusted_mode->hsync_start = fixed_mode->hsync_start; - adjusted_mode->hsync_end = fixed_mode->hsync_end; - adjusted_mode->htotal = fixed_mode->htotal; + drm_mode_copy(adjusted_mode, fixed_mode); + + drm_mode_set_crtcinfo(adjusted_mode, 0); +} + +/** + * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID + * @dev: drm device + * @fixed_mode : panel native mode + * @connector: LVDS/eDP connector + * + * Return downclock_avail + * Find the reduced downclock for LVDS/eDP in EDID. + */ +struct drm_display_mode * +intel_find_panel_downclock(struct drm_device *dev, + struct drm_display_mode *fixed_mode, + struct drm_connector *connector) +{ + struct drm_display_mode *scan, *tmp_mode; + int temp_downclock; - adjusted_mode->vdisplay = fixed_mode->vdisplay; - adjusted_mode->vsync_start = fixed_mode->vsync_start; - adjusted_mode->vsync_end = fixed_mode->vsync_end; - adjusted_mode->vtotal = fixed_mode->vtotal; + temp_downclock = fixed_mode->clock; + tmp_mode = NULL; - adjusted_mode->clock = fixed_mode->clock; + list_for_each_entry(scan, &connector->probed_modes, head) { + /* + * If one mode has the same resolution with the fixed_panel + * mode while they have the different refresh rate, it means + * that the reduced downclock is found. In such + * case we can set the different FPx0/1 to dynamically select + * between low and high frequency. + */ + if (scan->hdisplay == fixed_mode->hdisplay && + scan->hsync_start == fixed_mode->hsync_start && + scan->hsync_end == fixed_mode->hsync_end && + scan->htotal == fixed_mode->htotal && + scan->vdisplay == fixed_mode->vdisplay && + scan->vsync_start == fixed_mode->vsync_start && + scan->vsync_end == fixed_mode->vsync_end && + scan->vtotal == fixed_mode->vtotal) { + if (scan->clock < temp_downclock) { + /* + * The downclock is already found. But we + * expect to find the lower downclock. + */ + temp_downclock = scan->clock; + tmp_mode = scan; + } + } + } - drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); + if (temp_downclock < fixed_mode->clock) + return drm_mode_duplicate(dev, tmp_mode); + else + return NULL; } /* adjusted_mode has been preset to be the panel's fixed mode */ void -intel_pch_panel_fitting(struct drm_device *dev, - int fitting_mode, - struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) +intel_pch_panel_fitting(struct intel_crtc *intel_crtc, + struct intel_crtc_config *pipe_config, + int fitting_mode) { - struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_display_mode *adjusted_mode; int x, y, width, height; + adjusted_mode = &pipe_config->adjusted_mode; + x = y = width = height = 0; /* Native modes don't need fitting */ - if (adjusted_mode->hdisplay == mode->hdisplay && - adjusted_mode->vdisplay == mode->vdisplay) + if (adjusted_mode->hdisplay == pipe_config->pipe_src_w && + adjusted_mode->vdisplay == pipe_config->pipe_src_h) goto done; switch (fitting_mode) { case DRM_MODE_SCALE_CENTER: - width = mode->hdisplay; - height = mode->vdisplay; + width = pipe_config->pipe_src_w; + height = pipe_config->pipe_src_h; x = (adjusted_mode->hdisplay - width + 1)/2; y = (adjusted_mode->vdisplay - height + 1)/2; break; @@ -79,15 +124,21 @@ intel_pch_panel_fitting(struct drm_device *dev, case DRM_MODE_SCALE_ASPECT: /* Scale but preserve the aspect ratio */ { - u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay; - u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay; + u32 scaled_width = adjusted_mode->hdisplay + * pipe_config->pipe_src_h; + u32 scaled_height = pipe_config->pipe_src_w + * adjusted_mode->vdisplay; if (scaled_width > scaled_height) { /* pillar */ - width = scaled_height / mode->vdisplay; + width = scaled_height / pipe_config->pipe_src_h; + if (width & 1) + width++; x = (adjusted_mode->hdisplay - width + 1) / 2; y = 0; height = adjusted_mode->vdisplay; } else if (scaled_width < scaled_height) { /* letter */ - height = scaled_width / mode->hdisplay; + height = scaled_width / pipe_config->pipe_src_w; + if (height & 1) + height++; y = (adjusted_mode->vdisplay - height + 1) / 2; x = 0; width = adjusted_mode->hdisplay; @@ -99,122 +150,1072 @@ intel_pch_panel_fitting(struct drm_device *dev, } break; - default: case DRM_MODE_SCALE_FULLSCREEN: x = y = 0; width = adjusted_mode->hdisplay; height = adjusted_mode->vdisplay; break; + + default: + WARN(1, "bad panel fit mode: %d\n", fitting_mode); + return; } done: - dev_priv->pch_pf_pos = (x << 16) | y; - dev_priv->pch_pf_size = (width << 16) | height; + pipe_config->pch_pfit.pos = (x << 16) | y; + pipe_config->pch_pfit.size = (width << 16) | height; + pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0; } -static int is_backlight_combination_mode(struct drm_device *dev) +static void +centre_horizontally(struct drm_display_mode *mode, + int width) { - struct drm_i915_private *dev_priv = dev->dev_private; + u32 border, sync_pos, blank_width, sync_width; - if (INTEL_INFO(dev)->gen >= 4) - return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE; + /* keep the hsync and hblank widths constant */ + sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start; + blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start; + sync_pos = (blank_width - sync_width + 1) / 2; - if (IS_GEN2(dev)) - return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE; + border = (mode->hdisplay - width + 1) / 2; + border += border & 1; /* make the border even */ - return 0; + mode->crtc_hdisplay = width; + mode->crtc_hblank_start = width + border; + mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width; + + mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos; + mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width; } -u32 intel_panel_get_max_backlight(struct drm_device *dev) +static void +centre_vertically(struct drm_display_mode *mode, + int height) { - struct drm_i915_private *dev_priv = dev->dev_private; - u32 max; + u32 border, sync_pos, blank_width, sync_width; - if (HAS_PCH_SPLIT(dev)) { - max = I915_READ(BLC_PWM_PCH_CTL2) >> 16; - } else { - max = I915_READ(BLC_PWM_CTL); - if (IS_PINEVIEW(dev)) { - max >>= 17; - } else { - max >>= 16; - if (INTEL_INFO(dev)->gen < 4) - max &= ~1; + /* keep the vsync and vblank widths constant */ + sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start; + blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start; + sync_pos = (blank_width - sync_width + 1) / 2; + + border = (mode->vdisplay - height + 1) / 2; + + mode->crtc_vdisplay = height; + mode->crtc_vblank_start = height + border; + mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width; + + mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos; + mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width; +} + +static inline u32 panel_fitter_scaling(u32 source, u32 target) +{ + /* + * Floating point operation is not supported. So the FACTOR + * is defined, which can avoid the floating point computation + * when calculating the panel ratio. + */ +#define ACCURACY 12 +#define FACTOR (1 << ACCURACY) + u32 ratio = source * FACTOR / target; + return (FACTOR * ratio + FACTOR/2) / FACTOR; +} + +static void i965_scale_aspect(struct intel_crtc_config *pipe_config, + u32 *pfit_control) +{ + struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; + u32 scaled_width = adjusted_mode->hdisplay * + pipe_config->pipe_src_h; + u32 scaled_height = pipe_config->pipe_src_w * + adjusted_mode->vdisplay; + + /* 965+ is easy, it does everything in hw */ + if (scaled_width > scaled_height) + *pfit_control |= PFIT_ENABLE | + PFIT_SCALING_PILLAR; + else if (scaled_width < scaled_height) + *pfit_control |= PFIT_ENABLE | + PFIT_SCALING_LETTER; + else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w) + *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO; +} + +static void i9xx_scale_aspect(struct intel_crtc_config *pipe_config, + u32 *pfit_control, u32 *pfit_pgm_ratios, + u32 *border) +{ + struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; + u32 scaled_width = adjusted_mode->hdisplay * + pipe_config->pipe_src_h; + u32 scaled_height = pipe_config->pipe_src_w * + adjusted_mode->vdisplay; + u32 bits; + + /* + * For earlier chips we have to calculate the scaling + * ratio by hand and program it into the + * PFIT_PGM_RATIO register + */ + if (scaled_width > scaled_height) { /* pillar */ + centre_horizontally(adjusted_mode, + scaled_height / + pipe_config->pipe_src_h); + + *border = LVDS_BORDER_ENABLE; + if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) { + bits = panel_fitter_scaling(pipe_config->pipe_src_h, + adjusted_mode->vdisplay); + + *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | + bits << PFIT_VERT_SCALE_SHIFT); + *pfit_control |= (PFIT_ENABLE | + VERT_INTERP_BILINEAR | + HORIZ_INTERP_BILINEAR); } + } else if (scaled_width < scaled_height) { /* letter */ + centre_vertically(adjusted_mode, + scaled_width / + pipe_config->pipe_src_w); + + *border = LVDS_BORDER_ENABLE; + if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) { + bits = panel_fitter_scaling(pipe_config->pipe_src_w, + adjusted_mode->hdisplay); - if (is_backlight_combination_mode(dev)) - max *= 0xff; + *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | + bits << PFIT_VERT_SCALE_SHIFT); + *pfit_control |= (PFIT_ENABLE | + VERT_INTERP_BILINEAR | + HORIZ_INTERP_BILINEAR); + } + } else { + /* Aspects match, Let hw scale both directions */ + *pfit_control |= (PFIT_ENABLE | + VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | + VERT_INTERP_BILINEAR | + HORIZ_INTERP_BILINEAR); } +} + +void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc, + struct intel_crtc_config *pipe_config, + int fitting_mode) +{ + struct drm_device *dev = intel_crtc->base.dev; + u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0; + struct drm_display_mode *adjusted_mode; + + adjusted_mode = &pipe_config->adjusted_mode; - if (max == 0) { - /* XXX add code here to query mode clock or hardware clock - * and program max PWM appropriately. + /* Native modes don't need fitting */ + if (adjusted_mode->hdisplay == pipe_config->pipe_src_w && + adjusted_mode->vdisplay == pipe_config->pipe_src_h) + goto out; + + switch (fitting_mode) { + case DRM_MODE_SCALE_CENTER: + /* + * For centered modes, we have to calculate border widths & + * heights and modify the values programmed into the CRTC. + */ + centre_horizontally(adjusted_mode, pipe_config->pipe_src_w); + centre_vertically(adjusted_mode, pipe_config->pipe_src_h); + border = LVDS_BORDER_ENABLE; + break; + case DRM_MODE_SCALE_ASPECT: + /* Scale but preserve the aspect ratio */ + if (INTEL_INFO(dev)->gen >= 4) + i965_scale_aspect(pipe_config, &pfit_control); + else + i9xx_scale_aspect(pipe_config, &pfit_control, + &pfit_pgm_ratios, &border); + break; + case DRM_MODE_SCALE_FULLSCREEN: + /* + * Full scaling, even if it changes the aspect ratio. + * Fortunately this is all done for us in hw. */ - DRM_ERROR("fixme: max PWM is zero.\n"); - max = 1; + if (pipe_config->pipe_src_h != adjusted_mode->vdisplay || + pipe_config->pipe_src_w != adjusted_mode->hdisplay) { + pfit_control |= PFIT_ENABLE; + if (INTEL_INFO(dev)->gen >= 4) + pfit_control |= PFIT_SCALING_AUTO; + else + pfit_control |= (VERT_AUTO_SCALE | + VERT_INTERP_BILINEAR | + HORIZ_AUTO_SCALE | + HORIZ_INTERP_BILINEAR); + } + break; + default: + WARN(1, "bad panel fit mode: %d\n", fitting_mode); + return; } - DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max); - return max; + /* 965+ wants fuzzy fitting */ + /* FIXME: handle multiple panels by failing gracefully */ + if (INTEL_INFO(dev)->gen >= 4) + pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) | + PFIT_FILTER_FUZZY); + +out: + if ((pfit_control & PFIT_ENABLE) == 0) { + pfit_control = 0; + pfit_pgm_ratios = 0; + } + + /* Make sure pre-965 set dither correctly for 18bpp panels. */ + if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18) + pfit_control |= PANEL_8TO6_DITHER_ENABLE; + + pipe_config->gmch_pfit.control = pfit_control; + pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios; + pipe_config->gmch_pfit.lvds_border_bits = border; } -u32 intel_panel_get_backlight(struct drm_device *dev) +enum drm_connector_status +intel_panel_detect(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; + + /* Assume that the BIOS does not lie through the OpRegion... */ + if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) { + return ioread32(dev_priv->opregion.lid_state) & 0x1 ? + connector_status_connected : + connector_status_disconnected; + } + + switch (i915.panel_ignore_lid) { + case -2: + return connector_status_connected; + case -1: + return connector_status_disconnected; + default: + return connector_status_unknown; + } +} + +static u32 intel_panel_compute_brightness(struct intel_connector *connector, + u32 val) +{ + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_panel *panel = &connector->panel; + + WARN_ON(panel->backlight.max == 0); + + if (i915.invert_brightness < 0) + return val; + + if (i915.invert_brightness > 0 || + dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { + return panel->backlight.max - val; + } + + 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; + struct drm_i915_private *dev_priv = dev->dev_private; + + return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; +} + +static u32 i9xx_get_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 val; - 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_PINEVIEW(dev)) - val >>= 1; + val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; + if (INTEL_INFO(dev)->gen < 4) + val >>= 1; - if (is_backlight_combination_mode(dev)){ - u8 lbpc; + if (panel->backlight.combination_mode) { + u8 lbpc; - val &= ~1; - pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc); - val *= lbpc; - val >>= 1; - } + pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc); + val *= lbpc; } + return val; +} + +static u32 _vlv_get_backlight(struct drm_device *dev, enum pipe pipe) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; +} + +static u32 vlv_get_backlight(struct intel_connector *connector) +{ + struct drm_device *dev = connector->base.dev; + enum pipe pipe = intel_get_pipe_from_connector(connector); + + return _vlv_get_backlight(dev, pipe); +} + +static u32 intel_panel_get_backlight(struct intel_connector *connector) +{ + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + u32 val; + unsigned long flags; + + spin_lock_irqsave(&dev_priv->backlight_lock, flags); + + val = dev_priv->display.get_backlight(connector); + val = intel_panel_compute_brightness(connector, val); + + spin_unlock_irqrestore(&dev_priv->backlight_lock, flags); + DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val); return val; } -static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level) +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_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; - I915_WRITE(BLC_PWM_CPU_CTL, val | level); + u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; + I915_WRITE(BLC_PWM_PCH_CTL2, val | level); } -void intel_panel_set_backlight(struct drm_device *dev, u32 level) +static void pch_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 tmp; - DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); + tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; + I915_WRITE(BLC_PWM_CPU_CTL, tmp | level); +} - if (HAS_PCH_SPLIT(dev)) - return intel_pch_panel_set_backlight(dev, level); +static void i9xx_set_backlight(struct intel_connector *connector, u32 level) +{ + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_panel *panel = &connector->panel; + u32 tmp, mask; - if (is_backlight_combination_mode(dev)){ - u32 max = intel_panel_get_max_backlight(dev); - u8 lpbc; + WARN_ON(panel->backlight.max == 0); - lpbc = level * 0xfe / max + 1; - level /= lpbc; - pci_write_config_byte(dev->pdev, PCI_LBPC, lpbc); + if (panel->backlight.combination_mode) { + u8 lbpc; + + lbpc = level * 0xfe / panel->backlight.max + 1; + level /= lbpc; + pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc); } - tmp = I915_READ(BLC_PWM_CTL); - if (IS_PINEVIEW(dev)) { - tmp &= ~(BACKLIGHT_DUTY_CYCLE_MASK - 1); + if (IS_GEN4(dev)) { + mask = BACKLIGHT_DUTY_CYCLE_MASK; + } else { level <<= 1; - } else - tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK; + mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV; + } + + tmp = I915_READ(BLC_PWM_CTL) & ~mask; I915_WRITE(BLC_PWM_CTL, tmp | level); } + +static void vlv_set_backlight(struct intel_connector *connector, u32 level) +{ + 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 tmp; + + tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK; + I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level); +} + +static void +intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level) +{ + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); + + level = intel_panel_compute_brightness(connector, level); + dev_priv->display.set_backlight(connector, level); +} + +/* set backlight brightness to level in range [0..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; + struct intel_panel *panel = &connector->panel; + enum pipe pipe = intel_get_pipe_from_connector(connector); + u32 freq; + unsigned long flags; + u64 n; + + if (!panel->backlight.present || pipe == INVALID_PIPE) + return; + + spin_lock_irqsave(&dev_priv->backlight_lock, flags); + + WARN_ON(panel->backlight.max == 0); + + /* scale to hardware max, but be careful to not overflow */ + freq = panel->backlight.max; + n = (u64)level * freq; + do_div(n, max); + level = n; + + panel->backlight.level = level; + if (panel->backlight.device) + panel->backlight.device->props.brightness = level; + + if (panel->backlight.enabled) + intel_panel_actually_set_backlight(connector, level); + + spin_unlock_irqrestore(&dev_priv->backlight_lock, flags); +} + +static void pch_disable_backlight(struct intel_connector *connector) +{ + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + u32 tmp; + + intel_panel_actually_set_backlight(connector, 0); + + tmp = I915_READ(BLC_PWM_CPU_CTL2); + I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); + + tmp = I915_READ(BLC_PWM_PCH_CTL1); + I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); +} + +static void i9xx_disable_backlight(struct intel_connector *connector) +{ + intel_panel_actually_set_backlight(connector, 0); +} + +static void i965_disable_backlight(struct intel_connector *connector) +{ + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + u32 tmp; + + intel_panel_actually_set_backlight(connector, 0); + + tmp = I915_READ(BLC_PWM_CTL2); + I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); +} + +static void vlv_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); + u32 tmp; + + intel_panel_actually_set_backlight(connector, 0); + + tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe)); + I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE); +} + +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; + struct intel_panel *panel = &connector->panel; + enum pipe pipe = intel_get_pipe_from_connector(connector); + unsigned long flags; + + if (!panel->backlight.present || 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 + * backlight. This will leave the backlight on unnecessarily when + * another client is not activated. + */ + if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) { + DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n"); + return; + } + + spin_lock_irqsave(&dev_priv->backlight_lock, flags); + + panel->backlight.enabled = false; + dev_priv->display.disable_backlight(connector); + + 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; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_panel *panel = &connector->panel; + enum pipe pipe = intel_get_pipe_from_connector(connector); + enum transcoder cpu_transcoder = + intel_pipe_to_cpu_transcoder(dev_priv, pipe); + u32 cpu_ctl2, pch_ctl1, pch_ctl2; + + cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2); + if (cpu_ctl2 & BLM_PWM_ENABLE) { + WARN(1, "cpu backlight already enabled\n"); + cpu_ctl2 &= ~BLM_PWM_ENABLE; + I915_WRITE(BLC_PWM_CPU_CTL2, cpu_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); + } + + if (cpu_transcoder == TRANSCODER_EDP) + cpu_ctl2 = BLM_TRANSCODER_EDP; + else + cpu_ctl2 = BLM_PIPE(cpu_transcoder); + I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2); + POSTING_READ(BLC_PWM_CPU_CTL2); + I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); + + /* This won't stick until the above enable. */ + intel_panel_actually_set_backlight(connector, panel->backlight.level); + + 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; + + 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); +} + +static void i9xx_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 ctl, freq; + + ctl = I915_READ(BLC_PWM_CTL); + if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) { + WARN(1, "backlight already enabled\n"); + I915_WRITE(BLC_PWM_CTL, 0); + } + + freq = panel->backlight.max; + if (panel->backlight.combination_mode) + freq /= 0xff; + + ctl = freq << 17; + if (panel->backlight.combination_mode) + ctl |= BLM_LEGACY_MODE; + if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm) + ctl |= BLM_POLARITY_PNV; + + I915_WRITE(BLC_PWM_CTL, ctl); + POSTING_READ(BLC_PWM_CTL); + + /* XXX: combine this into above write? */ + intel_panel_actually_set_backlight(connector, panel->backlight.level); +} + +static void i965_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; + enum pipe pipe = intel_get_pipe_from_connector(connector); + u32 ctl, ctl2, freq; + + ctl2 = I915_READ(BLC_PWM_CTL2); + if (ctl2 & BLM_PWM_ENABLE) { + WARN(1, "backlight already enabled\n"); + ctl2 &= ~BLM_PWM_ENABLE; + I915_WRITE(BLC_PWM_CTL2, ctl2); + } + + freq = panel->backlight.max; + if (panel->backlight.combination_mode) + freq /= 0xff; + + ctl = freq << 16; + I915_WRITE(BLC_PWM_CTL, ctl); + + ctl2 = BLM_PIPE(pipe); + if (panel->backlight.combination_mode) + ctl2 |= BLM_COMBINATION_MODE; + if (panel->backlight.active_low_pwm) + ctl2 |= BLM_POLARITY_I965; + I915_WRITE(BLC_PWM_CTL2, ctl2); + POSTING_READ(BLC_PWM_CTL2); + I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); + + intel_panel_actually_set_backlight(connector, panel->backlight.level); +} + +static void vlv_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; + enum pipe pipe = intel_get_pipe_from_connector(connector); + u32 ctl, ctl2; + + ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe)); + if (ctl2 & BLM_PWM_ENABLE) { + WARN(1, "backlight already enabled\n"); + ctl2 &= ~BLM_PWM_ENABLE; + I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2); + } + + ctl = panel->backlight.max << 16; + I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl); + + /* XXX: combine this into above write? */ + intel_panel_actually_set_backlight(connector, panel->backlight.level); + + ctl2 = 0; + if (panel->backlight.active_low_pwm) + ctl2 |= BLM_POLARITY_I965; + I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2); + POSTING_READ(VLV_BLC_PWM_CTL2(pipe)); + I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE); +} + +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; + struct intel_panel *panel = &connector->panel; + enum pipe pipe = intel_get_pipe_from_connector(connector); + unsigned long flags; + + if (!panel->backlight.present || pipe == INVALID_PIPE) + return; + + DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe)); + + spin_lock_irqsave(&dev_priv->backlight_lock, flags); + + WARN_ON(panel->backlight.max == 0); + + if (panel->backlight.level == 0) { + panel->backlight.level = panel->backlight.max; + if (panel->backlight.device) + panel->backlight.device->props.brightness = + panel->backlight.level; + } + + dev_priv->display.enable_backlight(connector); + panel->backlight.enabled = true; + + spin_unlock_irqrestore(&dev_priv->backlight_lock, flags); +} + +#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) +static int intel_backlight_device_update_status(struct backlight_device *bd) +{ + struct intel_connector *connector = bl_get_data(bd); + struct drm_device *dev = connector->base.dev; + + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", + bd->props.brightness, bd->props.max_brightness); + intel_panel_set_backlight(connector, bd->props.brightness, + bd->props.max_brightness); + drm_modeset_unlock(&dev->mode_config.connection_mutex); + return 0; +} + +static int intel_backlight_device_get_brightness(struct backlight_device *bd) +{ + struct intel_connector *connector = bl_get_data(bd); + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + int ret; + + intel_runtime_pm_get(dev_priv); + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + ret = intel_panel_get_backlight(connector); + drm_modeset_unlock(&dev->mode_config.connection_mutex); + intel_runtime_pm_put(dev_priv); + + return ret; +} + +static const struct backlight_ops intel_backlight_device_ops = { + .update_status = intel_backlight_device_update_status, + .get_brightness = intel_backlight_device_get_brightness, +}; + +static int intel_backlight_device_register(struct intel_connector *connector) +{ + struct intel_panel *panel = &connector->panel; + struct backlight_properties props; + + if (WARN_ON(panel->backlight.device)) + return -ENODEV; + + BUG_ON(panel->backlight.max == 0); + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.brightness = panel->backlight.level; + props.max_brightness = panel->backlight.max; + + /* + * Note: using the same name independent of the connector prevents + * registration of multiple backlight devices in the driver. + */ + panel->backlight.device = + backlight_device_register("intel_backlight", + connector->base.kdev, + connector, + &intel_backlight_device_ops, &props); + + if (IS_ERR(panel->backlight.device)) { + DRM_ERROR("Failed to register backlight: %ld\n", + PTR_ERR(panel->backlight.device)); + panel->backlight.device = NULL; + return -ENODEV; + } + return 0; +} + +static void intel_backlight_device_unregister(struct intel_connector *connector) +{ + struct intel_panel *panel = &connector->panel; + + if (panel->backlight.device) { + backlight_device_unregister(panel->backlight.device); + panel->backlight.device = NULL; + } +} +#else /* CONFIG_BACKLIGHT_CLASS_DEVICE */ +static int intel_backlight_device_register(struct intel_connector *connector) +{ + return 0; +} +static void intel_backlight_device_unregister(struct intel_connector *connector) +{ +} +#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ + +/* + * Note: The setup hooks can't assume pipe is set! + * + * 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; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_panel *panel = &connector->panel; + u32 cpu_ctl2, 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 = pch_get_backlight(connector); + panel->backlight.level = intel_panel_compute_brightness(connector, val); + + 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; + + return 0; +} + +static int i9xx_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 ctl, val; + + ctl = I915_READ(BLC_PWM_CTL); + + if (IS_GEN2(dev) || IS_I915GM(dev) || IS_I945GM(dev)) + panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; + + if (IS_PINEVIEW(dev)) + panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; + + panel->backlight.max = ctl >> 17; + if (panel->backlight.combination_mode) + panel->backlight.max *= 0xff; + + if (!panel->backlight.max) + return -ENODEV; + + val = i9xx_get_backlight(connector); + panel->backlight.level = intel_panel_compute_brightness(connector, val); + + panel->backlight.enabled = panel->backlight.level != 0; + + return 0; +} + +static int i965_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 ctl, ctl2, val; + + ctl2 = I915_READ(BLC_PWM_CTL2); + panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; + panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; + + ctl = I915_READ(BLC_PWM_CTL); + panel->backlight.max = ctl >> 16; + if (panel->backlight.combination_mode) + panel->backlight.max *= 0xff; + + if (!panel->backlight.max) + return -ENODEV; + + val = i9xx_get_backlight(connector); + panel->backlight.level = intel_panel_compute_brightness(connector, val); + + panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) && + panel->backlight.level != 0; + + return 0; +} + +static int vlv_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; + enum pipe pipe; + u32 ctl, ctl2, val; + + 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); + } + + ctl2 = I915_READ(VLV_BLC_PWM_CTL2(PIPE_A)); + panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; + + ctl = I915_READ(VLV_BLC_PWM_CTL(PIPE_A)); + panel->backlight.max = ctl >> 16; + if (!panel->backlight.max) + return -ENODEV; + + val = _vlv_get_backlight(dev, PIPE_A); + panel->backlight.level = intel_panel_compute_brightness(connector, val); + + panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) && + panel->backlight.level != 0; + + return 0; +} + +int intel_panel_setup_backlight(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_connector *intel_connector = to_intel_connector(connector); + struct intel_panel *panel = &intel_connector->panel; + unsigned long flags; + int ret; + + if (!dev_priv->vbt.backlight.present) { + if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) { + DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n"); + } else { + DRM_DEBUG_KMS("no backlight present per VBT\n"); + return 0; + } + } + + /* set level and max in panel struct */ + spin_lock_irqsave(&dev_priv->backlight_lock, flags); + ret = dev_priv->display.setup_backlight(intel_connector); + spin_unlock_irqrestore(&dev_priv->backlight_lock, flags); + + if (ret) { + DRM_DEBUG_KMS("failed to setup backlight for connector %s\n", + connector->name); + return ret; + } + + intel_backlight_device_register(intel_connector); + + panel->backlight.present = true; + + DRM_DEBUG_KMS("backlight initialized, %s, brightness %u/%u, " + "sysfs interface %sregistered\n", + panel->backlight.enabled ? "enabled" : "disabled", + panel->backlight.level, panel->backlight.max, + panel->backlight.device ? "" : "not "); + + return 0; +} + +void intel_panel_destroy_backlight(struct drm_connector *connector) +{ + struct intel_connector *intel_connector = to_intel_connector(connector); + struct intel_panel *panel = &intel_connector->panel; + + panel->backlight.present = false; + intel_backlight_device_unregister(intel_connector); +} + +/* Set up chip specific backlight functions */ +void intel_panel_init_backlight_funcs(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + 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; + dev_priv->display.set_backlight = pch_set_backlight; + dev_priv->display.get_backlight = pch_get_backlight; + } else if (IS_VALLEYVIEW(dev)) { + dev_priv->display.setup_backlight = vlv_setup_backlight; + dev_priv->display.enable_backlight = vlv_enable_backlight; + dev_priv->display.disable_backlight = vlv_disable_backlight; + dev_priv->display.set_backlight = vlv_set_backlight; + dev_priv->display.get_backlight = vlv_get_backlight; + } else if (IS_GEN4(dev)) { + dev_priv->display.setup_backlight = i965_setup_backlight; + dev_priv->display.enable_backlight = i965_enable_backlight; + dev_priv->display.disable_backlight = i965_disable_backlight; + dev_priv->display.set_backlight = i9xx_set_backlight; + dev_priv->display.get_backlight = i9xx_get_backlight; + } else { + dev_priv->display.setup_backlight = i9xx_setup_backlight; + dev_priv->display.enable_backlight = i9xx_enable_backlight; + dev_priv->display.disable_backlight = i9xx_disable_backlight; + dev_priv->display.set_backlight = i9xx_set_backlight; + dev_priv->display.get_backlight = i9xx_get_backlight; + } +} + +int intel_panel_init(struct intel_panel *panel, + struct drm_display_mode *fixed_mode, + struct drm_display_mode *downclock_mode) +{ + panel->fixed_mode = fixed_mode; + panel->downclock_mode = downclock_mode; + + return 0; +} + +void intel_panel_fini(struct intel_panel *panel) +{ + struct intel_connector *intel_connector = + container_of(panel, struct intel_connector, panel); + + if (panel->fixed_mode) + drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode); + + if (panel->downclock_mode) + drm_mode_destroy(intel_connector->base.dev, + panel->downclock_mode); +} |