| /* |
| * Copyright © 2006-2010 Intel Corporation |
| * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: |
| * Eric Anholt <eric@anholt.net> |
| * Dave Airlie <airlied@linux.ie> |
| * Jesse Barnes <jesse.barnes@intel.com> |
| * Chris Wilson <chris@chris-wilson.co.uk> |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/moduleparam.h> |
| #include "intel_drv.h" |
| |
| void |
| intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, |
| struct drm_display_mode *adjusted_mode) |
| { |
| 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; |
| |
| temp_downclock = fixed_mode->clock; |
| tmp_mode = NULL; |
| |
| 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; |
| } |
| } |
| } |
| |
| 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 intel_crtc *intel_crtc, |
| struct intel_crtc_config *pipe_config, |
| int fitting_mode) |
| { |
| 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 == pipe_config->pipe_src_w && |
| adjusted_mode->vdisplay == pipe_config->pipe_src_h) |
| goto done; |
| |
| switch (fitting_mode) { |
| case DRM_MODE_SCALE_CENTER: |
| 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; |
| |
| case DRM_MODE_SCALE_ASPECT: |
| /* Scale but preserve the aspect ratio */ |
| { |
| 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 / 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 / pipe_config->pipe_src_w; |
| if (height & 1) |
| height++; |
| y = (adjusted_mode->vdisplay - height + 1) / 2; |
| x = 0; |
| width = adjusted_mode->hdisplay; |
| } else { |
| x = y = 0; |
| width = adjusted_mode->hdisplay; |
| height = adjusted_mode->vdisplay; |
| } |
| } |
| break; |
| |
| 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: |
| 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 void |
| centre_horizontally(struct drm_display_mode *mode, |
| int width) |
| { |
| u32 border, sync_pos, blank_width, sync_width; |
| |
| /* 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; |
| |
| border = (mode->hdisplay - width + 1) / 2; |
| border += border & 1; /* make the border even */ |
| |
| 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; |
| } |
| |
| static void |
| centre_vertically(struct drm_display_mode *mode, |
| int height) |
| { |
| u32 border, sync_pos, blank_width, sync_width; |
| |
| /* 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); |
| |
| *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; |
| |
| /* 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. |
| */ |
| 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; |
| } |
| |
| /* 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; |
| } |
| |
| 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; |
| } |
| } |
| |
| /** |
| * scale - scale values from one range to another |
| * |
| * @source_val: value in range [@source_min..@source_max] |
| * |
| * Return @source_val in range [@source_min..@source_max] scaled to range |
| * [@target_min..@target_max]. |
| */ |
| static uint32_t scale(uint32_t source_val, |
| uint32_t source_min, uint32_t source_max, |
| uint32_t target_min, uint32_t target_max) |
| { |
| uint64_t target_val; |
| |
| WARN_ON(source_min > source_max); |
| WARN_ON(target_min > target_max); |
| |
| /* defensive */ |
| source_val = clamp(source_val, source_min, source_max); |
| |
| /* avoid overflows */ |
| target_val = (uint64_t)(source_val - source_min) * |
| (target_max - target_min); |
| do_div(target_val, source_max - source_min); |
| target_val += target_min; |
| |
| return target_val; |
| } |
| |
| /* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */ |
| static inline u32 scale_user_to_hw(struct intel_connector *connector, |
| u32 user_level, u32 user_max) |
| { |
| struct intel_panel *panel = &connector->panel; |
| |
| return scale(user_level, 0, user_max, |
| panel->backlight.min, panel->backlight.max); |
| } |
| |
| /* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result |
| * to [hw_min..hw_max]. */ |
| static inline u32 clamp_user_to_hw(struct intel_connector *connector, |
| u32 user_level, u32 user_max) |
| { |
| struct intel_panel *panel = &connector->panel; |
| u32 hw_level; |
| |
| hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max); |
| hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max); |
| |
| return hw_level; |
| } |
| |
| /* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */ |
| static inline u32 scale_hw_to_user(struct intel_connector *connector, |
| u32 hw_level, u32 user_max) |
| { |
| struct intel_panel *panel = &connector->panel; |
| |
| return scale(hw_level, panel->backlight.min, panel->backlight.max, |
| 0, user_max); |
| } |
| |
| 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; |
| |
| val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
| if (INTEL_INFO(dev)->gen < 4) |
| val >>= 1; |
| |
| if (panel->backlight.combination_mode) { |
| u8 lbpc; |
| |
| 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 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; |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| u32 tmp; |
| |
| tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; |
| I915_WRITE(BLC_PWM_CPU_CTL, tmp | 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; |
| |
| WARN_ON(panel->backlight.max == 0); |
| |
| 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); |
| } |
| |
| if (IS_GEN4(dev)) { |
| mask = BACKLIGHT_DUTY_CYCLE_MASK; |
| } else { |
| level <<= 1; |
| 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], scaling wrt hw min */ |
| static void intel_panel_set_backlight(struct intel_connector *connector, |
| u32 user_level, u32 user_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 hw_level; |
| unsigned long flags; |
| |
| if (!panel->backlight.present || pipe == INVALID_PIPE) |
| return; |
| |
| spin_lock_irqsave(&dev_priv->backlight_lock, flags); |
| |
| WARN_ON(panel->backlight.max == 0); |
| |
| hw_level = scale_user_to_hw(connector, user_level, user_max); |
| panel->backlight.level = hw_level; |
| |
| if (panel->backlight.enabled) |
| intel_panel_actually_set_backlight(connector, hw_level); |
| |
| spin_unlock_irqrestore(&dev_priv->backlight_lock, flags); |
| } |
| |
| /* set backlight brightness to level in range [0..max], assuming hw min is |
| * respected. |
| */ |
| void intel_panel_set_backlight_acpi(struct intel_connector *connector, |
| u32 user_level, u32 user_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 hw_level; |
| unsigned long flags; |
| |
| if (!panel->backlight.present || pipe == INVALID_PIPE) |
| return; |
| |
| spin_lock_irqsave(&dev_priv->backlight_lock, flags); |
| |
| WARN_ON(panel->backlight.max == 0); |
| |
| hw_level = clamp_user_to_hw(connector, user_level, user_max); |
| panel->backlight.level = hw_level; |
| |
| if (panel->backlight.device) |
| panel->backlight.device->props.brightness = |
| scale_hw_to_user(connector, |
| panel->backlight.level, |
| panel->backlight.device->props.max_brightness); |
| |
| if (panel->backlight.enabled) |
| intel_panel_actually_set_backlight(connector, hw_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); |
| |
| if (panel->backlight.device) |
| panel->backlight.device->props.power = FB_BLANK_POWERDOWN; |
| 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 = |
| scale_hw_to_user(connector, |
| panel->backlight.level, |
| panel->backlight.device->props.max_brightness); |
| } |
| |
| dev_priv->display.enable_backlight(connector); |
| panel->backlight.enabled = true; |
| if (panel->backlight.device) |
| panel->backlight.device->props.power = FB_BLANK_UNBLANK; |
| |
| 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 intel_panel *panel = &connector->panel; |
| 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); |
| |
| /* |
| * Allow flipping bl_power as a sub-state of enabled. Sadly the |
| * backlight class device does not make it easy to to differentiate |
| * between callbacks for brightness and bl_power, so our backlight_power |
| * callback needs to take this into account. |
| */ |
| if (panel->backlight.enabled) { |
| if (panel->backlight_power) { |
| bool enable = bd->props.power == FB_BLANK_UNBLANK && |
| bd->props.brightness != 0; |
| panel->backlight_power(connector, enable); |
| } |
| } else { |
| bd->props.power = FB_BLANK_POWERDOWN; |
| } |
| |
| 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; |
| u32 hw_level; |
| int ret; |
| |
| intel_runtime_pm_get(dev_priv); |
| drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); |
| |
| hw_level = intel_panel_get_backlight(connector); |
| ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness); |
| |
| 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; |
| |
| WARN_ON(panel->backlight.max == 0); |
| |
| memset(&props, 0, sizeof(props)); |
| props.type = BACKLIGHT_RAW; |
| |
| /* |
| * Note: Everything should work even if the backlight device max |
| * presented to the userspace is arbitrarily chosen. |
| */ |
| props.max_brightness = panel->backlight.max; |
| props.brightness = scale_hw_to_user(connector, |
| panel->backlight.level, |
| props.max_brightness); |
| |
| if (panel->backlight.enabled) |
| props.power = FB_BLANK_UNBLANK; |
| else |
| props.power = FB_BLANK_POWERDOWN; |
| |
| /* |
| * 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 u32 get_backlight_min_vbt(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; |
| |
| WARN_ON(panel->backlight.max == 0); |
| |
| /* vbt value is a coefficient in range [0..255] */ |
| return scale(dev_priv->vbt.backlight.min_brightness, 0, 255, |
| 0, panel->backlight.max); |
| } |
| |
| 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; |
| |
| panel->backlight.min = get_backlight_min_vbt(connector); |
| |
| 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; |
| |
| panel->backlight.min = get_backlight_min_vbt(connector); |
| |
| 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; |
| |
| panel->backlight.min = get_backlight_min_vbt(connector); |
| |
| 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; |
| |
| panel->backlight.min = get_backlight_min_vbt(connector); |
| |
| 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(dev_priv, 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; |
| |
| panel->backlight.min = get_backlight_min_vbt(connector); |
| |
| 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); |
| } |