kernel-fxtec-pro1x/drivers/gpu/drm/i915/intel_lvds.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

1141 lines
33 KiB
C

/*
* Copyright © 2006-2007 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>
*/
#include <acpi/button.h>
#include <linux/dmi.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "drm_edid.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include <linux/acpi.h>
/* Private structure for the integrated LVDS support */
struct intel_lvds_priv {
int fitting_mode;
u32 pfit_control;
u32 pfit_pgm_ratios;
};
/**
* Sets the backlight level.
*
* \param level backlight level, from 0 to intel_lvds_get_max_backlight().
*/
static void intel_lvds_set_backlight(struct drm_device *dev, int level)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 blc_pwm_ctl, reg;
if (HAS_PCH_SPLIT(dev))
reg = BLC_PWM_CPU_CTL;
else
reg = BLC_PWM_CTL;
blc_pwm_ctl = I915_READ(reg) & ~BACKLIGHT_DUTY_CYCLE_MASK;
I915_WRITE(reg, (blc_pwm_ctl |
(level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
}
/**
* Returns the maximum level of the backlight duty cycle field.
*/
static u32 intel_lvds_get_max_backlight(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg;
if (HAS_PCH_SPLIT(dev))
reg = BLC_PWM_PCH_CTL2;
else
reg = BLC_PWM_CTL;
return ((I915_READ(reg) & BACKLIGHT_MODULATION_FREQ_MASK) >>
BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
}
/**
* Sets the power state for the panel.
*/
static void intel_lvds_set_power(struct drm_device *dev, bool on)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp_status, ctl_reg, status_reg, lvds_reg;
if (HAS_PCH_SPLIT(dev)) {
ctl_reg = PCH_PP_CONTROL;
status_reg = PCH_PP_STATUS;
lvds_reg = PCH_LVDS;
} else {
ctl_reg = PP_CONTROL;
status_reg = PP_STATUS;
lvds_reg = LVDS;
}
if (on) {
I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
POSTING_READ(lvds_reg);
I915_WRITE(ctl_reg, I915_READ(ctl_reg) |
POWER_TARGET_ON);
do {
pp_status = I915_READ(status_reg);
} while ((pp_status & PP_ON) == 0);
intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle);
} else {
intel_lvds_set_backlight(dev, 0);
I915_WRITE(ctl_reg, I915_READ(ctl_reg) &
~POWER_TARGET_ON);
do {
pp_status = I915_READ(status_reg);
} while (pp_status & PP_ON);
I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
POSTING_READ(lvds_reg);
}
}
static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
{
struct drm_device *dev = encoder->dev;
if (mode == DRM_MODE_DPMS_ON)
intel_lvds_set_power(dev, true);
else
intel_lvds_set_power(dev, false);
/* XXX: We never power down the LVDS pairs. */
}
static void intel_lvds_save(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp_on_reg, pp_off_reg, pp_ctl_reg, pp_div_reg;
u32 pwm_ctl_reg;
if (HAS_PCH_SPLIT(dev)) {
pp_on_reg = PCH_PP_ON_DELAYS;
pp_off_reg = PCH_PP_OFF_DELAYS;
pp_ctl_reg = PCH_PP_CONTROL;
pp_div_reg = PCH_PP_DIVISOR;
pwm_ctl_reg = BLC_PWM_CPU_CTL;
} else {
pp_on_reg = PP_ON_DELAYS;
pp_off_reg = PP_OFF_DELAYS;
pp_ctl_reg = PP_CONTROL;
pp_div_reg = PP_DIVISOR;
pwm_ctl_reg = BLC_PWM_CTL;
}
dev_priv->savePP_ON = I915_READ(pp_on_reg);
dev_priv->savePP_OFF = I915_READ(pp_off_reg);
dev_priv->savePP_CONTROL = I915_READ(pp_ctl_reg);
dev_priv->savePP_DIVISOR = I915_READ(pp_div_reg);
dev_priv->saveBLC_PWM_CTL = I915_READ(pwm_ctl_reg);
dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
BACKLIGHT_DUTY_CYCLE_MASK);
/*
* If the light is off at server startup, just make it full brightness
*/
if (dev_priv->backlight_duty_cycle == 0)
dev_priv->backlight_duty_cycle =
intel_lvds_get_max_backlight(dev);
}
static void intel_lvds_restore(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp_on_reg, pp_off_reg, pp_ctl_reg, pp_div_reg;
u32 pwm_ctl_reg;
if (HAS_PCH_SPLIT(dev)) {
pp_on_reg = PCH_PP_ON_DELAYS;
pp_off_reg = PCH_PP_OFF_DELAYS;
pp_ctl_reg = PCH_PP_CONTROL;
pp_div_reg = PCH_PP_DIVISOR;
pwm_ctl_reg = BLC_PWM_CPU_CTL;
} else {
pp_on_reg = PP_ON_DELAYS;
pp_off_reg = PP_OFF_DELAYS;
pp_ctl_reg = PP_CONTROL;
pp_div_reg = PP_DIVISOR;
pwm_ctl_reg = BLC_PWM_CTL;
}
I915_WRITE(pwm_ctl_reg, dev_priv->saveBLC_PWM_CTL);
I915_WRITE(pp_on_reg, dev_priv->savePP_ON);
I915_WRITE(pp_off_reg, dev_priv->savePP_OFF);
I915_WRITE(pp_div_reg, dev_priv->savePP_DIVISOR);
I915_WRITE(pp_ctl_reg, dev_priv->savePP_CONTROL);
if (dev_priv->savePP_CONTROL & POWER_TARGET_ON)
intel_lvds_set_power(dev, true);
else
intel_lvds_set_power(dev, false);
}
static int intel_lvds_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode;
if (fixed_mode) {
if (mode->hdisplay > fixed_mode->hdisplay)
return MODE_PANEL;
if (mode->vdisplay > fixed_mode->vdisplay)
return MODE_PANEL;
}
return MODE_OK;
}
static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
/*
* float point operation is not supported . So the PANEL_RATIO_FACTOR
* is defined, which can avoid the float point computation when
* calculating the panel ratio.
*/
#define PANEL_RATIO_FACTOR 8192
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
struct drm_encoder *tmp_encoder;
struct intel_output *intel_output = enc_to_intel_output(encoder);
struct intel_lvds_priv *lvds_priv = intel_output->dev_priv;
u32 pfit_control = 0, pfit_pgm_ratios = 0;
int left_border = 0, right_border = 0, top_border = 0;
int bottom_border = 0;
bool border = 0;
int panel_ratio, desired_ratio, vert_scale, horiz_scale;
int horiz_ratio, vert_ratio;
u32 hsync_width, vsync_width;
u32 hblank_width, vblank_width;
u32 hsync_pos, vsync_pos;
/* Should never happen!! */
if (!IS_I965G(dev) && intel_crtc->pipe == 0) {
DRM_ERROR("Can't support LVDS on pipe A\n");
return false;
}
/* Should never happen!! */
list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
DRM_ERROR("Can't enable LVDS and another "
"encoder on the same pipe\n");
return false;
}
}
/* If we don't have a panel mode, there is nothing we can do */
if (dev_priv->panel_fixed_mode == NULL)
return true;
/*
* If we have timings from the BIOS for the panel, put them in
* to the adjusted mode. The CRTC will be set up for this mode,
* with the panel scaling set up to source from the H/VDisplay
* of the original mode.
*/
if (dev_priv->panel_fixed_mode != NULL) {
adjusted_mode->hdisplay = dev_priv->panel_fixed_mode->hdisplay;
adjusted_mode->hsync_start =
dev_priv->panel_fixed_mode->hsync_start;
adjusted_mode->hsync_end =
dev_priv->panel_fixed_mode->hsync_end;
adjusted_mode->htotal = dev_priv->panel_fixed_mode->htotal;
adjusted_mode->vdisplay = dev_priv->panel_fixed_mode->vdisplay;
adjusted_mode->vsync_start =
dev_priv->panel_fixed_mode->vsync_start;
adjusted_mode->vsync_end =
dev_priv->panel_fixed_mode->vsync_end;
adjusted_mode->vtotal = dev_priv->panel_fixed_mode->vtotal;
adjusted_mode->clock = dev_priv->panel_fixed_mode->clock;
drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
}
/* Make sure pre-965s set dither correctly */
if (!IS_I965G(dev)) {
if (dev_priv->panel_wants_dither || dev_priv->lvds_dither)
pfit_control |= PANEL_8TO6_DITHER_ENABLE;
}
/* Native modes don't need fitting */
if (adjusted_mode->hdisplay == mode->hdisplay &&
adjusted_mode->vdisplay == mode->vdisplay) {
pfit_pgm_ratios = 0;
border = 0;
goto out;
}
/* full screen scale for now */
if (HAS_PCH_SPLIT(dev))
goto out;
/* 965+ wants fuzzy fitting */
if (IS_I965G(dev))
pfit_control |= (intel_crtc->pipe << PFIT_PIPE_SHIFT) |
PFIT_FILTER_FUZZY;
hsync_width = adjusted_mode->crtc_hsync_end -
adjusted_mode->crtc_hsync_start;
vsync_width = adjusted_mode->crtc_vsync_end -
adjusted_mode->crtc_vsync_start;
hblank_width = adjusted_mode->crtc_hblank_end -
adjusted_mode->crtc_hblank_start;
vblank_width = adjusted_mode->crtc_vblank_end -
adjusted_mode->crtc_vblank_start;
/*
* Deal with panel fitting options. Figure out how to stretch the
* image based on its aspect ratio & the current panel fitting mode.
*/
panel_ratio = adjusted_mode->hdisplay * PANEL_RATIO_FACTOR /
adjusted_mode->vdisplay;
desired_ratio = mode->hdisplay * PANEL_RATIO_FACTOR /
mode->vdisplay;
/*
* Enable automatic panel scaling for non-native modes so that they fill
* the screen. Should be enabled before the pipe is enabled, according
* to register description and PRM.
* Change the value here to see the borders for debugging
*/
if (!HAS_PCH_SPLIT(dev)) {
I915_WRITE(BCLRPAT_A, 0);
I915_WRITE(BCLRPAT_B, 0);
}
switch (lvds_priv->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.
*/
left_border = (adjusted_mode->hdisplay - mode->hdisplay) / 2;
right_border = left_border;
if (mode->hdisplay & 1)
right_border++;
top_border = (adjusted_mode->vdisplay - mode->vdisplay) / 2;
bottom_border = top_border;
if (mode->vdisplay & 1)
bottom_border++;
/* Set active & border values */
adjusted_mode->crtc_hdisplay = mode->hdisplay;
/* Keep the boder be even */
if (right_border & 1)
right_border++;
/* use the border directly instead of border minuse one */
adjusted_mode->crtc_hblank_start = mode->hdisplay +
right_border;
/* keep the blank width constant */
adjusted_mode->crtc_hblank_end =
adjusted_mode->crtc_hblank_start + hblank_width;
/* get the hsync pos relative to hblank start */
hsync_pos = (hblank_width - hsync_width) / 2;
/* keep the hsync pos be even */
if (hsync_pos & 1)
hsync_pos++;
adjusted_mode->crtc_hsync_start =
adjusted_mode->crtc_hblank_start + hsync_pos;
/* keep the hsync width constant */
adjusted_mode->crtc_hsync_end =
adjusted_mode->crtc_hsync_start + hsync_width;
adjusted_mode->crtc_vdisplay = mode->vdisplay;
/* use the border instead of border minus one */
adjusted_mode->crtc_vblank_start = mode->vdisplay +
bottom_border;
/* keep the vblank width constant */
adjusted_mode->crtc_vblank_end =
adjusted_mode->crtc_vblank_start + vblank_width;
/* get the vsync start postion relative to vblank start */
vsync_pos = (vblank_width - vsync_width) / 2;
adjusted_mode->crtc_vsync_start =
adjusted_mode->crtc_vblank_start + vsync_pos;
/* keep the vsync width constant */
adjusted_mode->crtc_vsync_end =
adjusted_mode->crtc_vsync_start + vsync_width;
border = 1;
break;
case DRM_MODE_SCALE_ASPECT:
/* Scale but preserve the spect ratio */
pfit_control |= PFIT_ENABLE;
if (IS_I965G(dev)) {
/* 965+ is easy, it does everything in hw */
if (panel_ratio > desired_ratio)
pfit_control |= PFIT_SCALING_PILLAR;
else if (panel_ratio < desired_ratio)
pfit_control |= PFIT_SCALING_LETTER;
else
pfit_control |= PFIT_SCALING_AUTO;
} else {
/*
* For earlier chips we have to calculate the scaling
* ratio by hand and program it into the
* PFIT_PGM_RATIO register
*/
u32 horiz_bits, vert_bits, bits = 12;
horiz_ratio = mode->hdisplay * PANEL_RATIO_FACTOR/
adjusted_mode->hdisplay;
vert_ratio = mode->vdisplay * PANEL_RATIO_FACTOR/
adjusted_mode->vdisplay;
horiz_scale = adjusted_mode->hdisplay *
PANEL_RATIO_FACTOR / mode->hdisplay;
vert_scale = adjusted_mode->vdisplay *
PANEL_RATIO_FACTOR / mode->vdisplay;
/* retain aspect ratio */
if (panel_ratio > desired_ratio) { /* Pillar */
u32 scaled_width;
scaled_width = mode->hdisplay * vert_scale /
PANEL_RATIO_FACTOR;
horiz_ratio = vert_ratio;
pfit_control |= (VERT_AUTO_SCALE |
VERT_INTERP_BILINEAR |
HORIZ_INTERP_BILINEAR);
/* Pillar will have left/right borders */
left_border = (adjusted_mode->hdisplay -
scaled_width) / 2;
right_border = left_border;
if (mode->hdisplay & 1) /* odd resolutions */
right_border++;
/* keep the border be even */
if (right_border & 1)
right_border++;
adjusted_mode->crtc_hdisplay = scaled_width;
/* use border instead of border minus one */
adjusted_mode->crtc_hblank_start =
scaled_width + right_border;
/* keep the hblank width constant */
adjusted_mode->crtc_hblank_end =
adjusted_mode->crtc_hblank_start +
hblank_width;
/*
* get the hsync start pos relative to
* hblank start
*/
hsync_pos = (hblank_width - hsync_width) / 2;
/* keep the hsync_pos be even */
if (hsync_pos & 1)
hsync_pos++;
adjusted_mode->crtc_hsync_start =
adjusted_mode->crtc_hblank_start +
hsync_pos;
/* keept hsync width constant */
adjusted_mode->crtc_hsync_end =
adjusted_mode->crtc_hsync_start +
hsync_width;
border = 1;
} else if (panel_ratio < desired_ratio) { /* letter */
u32 scaled_height = mode->vdisplay *
horiz_scale / PANEL_RATIO_FACTOR;
vert_ratio = horiz_ratio;
pfit_control |= (HORIZ_AUTO_SCALE |
VERT_INTERP_BILINEAR |
HORIZ_INTERP_BILINEAR);
/* Letterbox will have top/bottom border */
top_border = (adjusted_mode->vdisplay -
scaled_height) / 2;
bottom_border = top_border;
if (mode->vdisplay & 1)
bottom_border++;
adjusted_mode->crtc_vdisplay = scaled_height;
/* use border instead of border minus one */
adjusted_mode->crtc_vblank_start =
scaled_height + bottom_border;
/* keep the vblank width constant */
adjusted_mode->crtc_vblank_end =
adjusted_mode->crtc_vblank_start +
vblank_width;
/*
* get the vsync start pos relative to
* vblank start
*/
vsync_pos = (vblank_width - vsync_width) / 2;
adjusted_mode->crtc_vsync_start =
adjusted_mode->crtc_vblank_start +
vsync_pos;
/* keep the vsync width constant */
adjusted_mode->crtc_vsync_end =
adjusted_mode->crtc_vsync_start +
vsync_width;
border = 1;
} else {
/* Aspects match, Let hw scale both directions */
pfit_control |= (VERT_AUTO_SCALE |
HORIZ_AUTO_SCALE |
VERT_INTERP_BILINEAR |
HORIZ_INTERP_BILINEAR);
}
horiz_bits = (1 << bits) * horiz_ratio /
PANEL_RATIO_FACTOR;
vert_bits = (1 << bits) * vert_ratio /
PANEL_RATIO_FACTOR;
pfit_pgm_ratios =
((vert_bits << PFIT_VERT_SCALE_SHIFT) &
PFIT_VERT_SCALE_MASK) |
((horiz_bits << PFIT_HORIZ_SCALE_SHIFT) &
PFIT_HORIZ_SCALE_MASK);
}
break;
case DRM_MODE_SCALE_FULLSCREEN:
/*
* Full scaling, even if it changes the aspect ratio.
* Fortunately this is all done for us in hw.
*/
pfit_control |= PFIT_ENABLE;
if (IS_I965G(dev))
pfit_control |= PFIT_SCALING_AUTO;
else
pfit_control |= (VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
VERT_INTERP_BILINEAR |
HORIZ_INTERP_BILINEAR);
break;
default:
break;
}
out:
lvds_priv->pfit_control = pfit_control;
lvds_priv->pfit_pgm_ratios = pfit_pgm_ratios;
/*
* When there exists the border, it means that the LVDS_BORDR
* should be enabled.
*/
if (border)
dev_priv->lvds_border_bits |= LVDS_BORDER_ENABLE;
else
dev_priv->lvds_border_bits &= ~(LVDS_BORDER_ENABLE);
/*
* XXX: It would be nice to support lower refresh rates on the
* panels to reduce power consumption, and perhaps match the
* user's requested refresh rate.
*/
return true;
}
static void intel_lvds_prepare(struct drm_encoder *encoder)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg;
if (HAS_PCH_SPLIT(dev))
reg = BLC_PWM_CPU_CTL;
else
reg = BLC_PWM_CTL;
dev_priv->saveBLC_PWM_CTL = I915_READ(reg);
dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
BACKLIGHT_DUTY_CYCLE_MASK);
intel_lvds_set_power(dev, false);
}
static void intel_lvds_commit( struct drm_encoder *encoder)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (dev_priv->backlight_duty_cycle == 0)
dev_priv->backlight_duty_cycle =
intel_lvds_get_max_backlight(dev);
intel_lvds_set_power(dev, true);
}
static void intel_lvds_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_output *intel_output = enc_to_intel_output(encoder);
struct intel_lvds_priv *lvds_priv = intel_output->dev_priv;
/*
* The LVDS pin pair will already have been turned on in the
* intel_crtc_mode_set since it has a large impact on the DPLL
* settings.
*/
if (HAS_PCH_SPLIT(dev))
return;
/*
* Enable automatic panel scaling so that non-native modes fill the
* screen. Should be enabled before the pipe is enabled, according to
* register description and PRM.
*/
I915_WRITE(PFIT_PGM_RATIOS, lvds_priv->pfit_pgm_ratios);
I915_WRITE(PFIT_CONTROL, lvds_priv->pfit_control);
}
/**
* Detect the LVDS connection.
*
* Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
* connected and closed means disconnected. We also send hotplug events as
* needed, using lid status notification from the input layer.
*/
static enum drm_connector_status intel_lvds_detect(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
enum drm_connector_status status = connector_status_connected;
/* ACPI lid methods were generally unreliable in this generation, so
* don't even bother.
*/
if (IS_GEN2(dev) || IS_GEN3(dev))
return connector_status_connected;
return status;
}
/**
* Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
*/
static int intel_lvds_get_modes(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct intel_output *intel_output = to_intel_output(connector);
struct drm_i915_private *dev_priv = dev->dev_private;
int ret = 0;
ret = intel_ddc_get_modes(intel_output);
if (ret)
return ret;
/* Didn't get an EDID, so
* Set wide sync ranges so we get all modes
* handed to valid_mode for checking
*/
connector->display_info.min_vfreq = 0;
connector->display_info.max_vfreq = 200;
connector->display_info.min_hfreq = 0;
connector->display_info.max_hfreq = 200;
if (dev_priv->panel_fixed_mode != NULL) {
struct drm_display_mode *mode;
mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
drm_mode_probed_add(connector, mode);
return 1;
}
return 0;
}
/*
* Lid events. Note the use of 'modeset_on_lid':
* - we set it on lid close, and reset it on open
* - we use it as a "only once" bit (ie we ignore
* duplicate events where it was already properly
* set/reset)
* - the suspend/resume paths will also set it to
* zero, since they restore the mode ("lid open").
*/
static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
void *unused)
{
struct drm_i915_private *dev_priv =
container_of(nb, struct drm_i915_private, lid_notifier);
struct drm_device *dev = dev_priv->dev;
struct drm_connector *connector = dev_priv->int_lvds_connector;
/*
* check and update the status of LVDS connector after receiving
* the LID nofication event.
*/
if (connector)
connector->status = connector->funcs->detect(connector);
if (!acpi_lid_open()) {
dev_priv->modeset_on_lid = 1;
return NOTIFY_OK;
}
if (!dev_priv->modeset_on_lid)
return NOTIFY_OK;
dev_priv->modeset_on_lid = 0;
mutex_lock(&dev->mode_config.mutex);
drm_helper_resume_force_mode(dev);
mutex_unlock(&dev->mode_config.mutex);
return NOTIFY_OK;
}
/**
* intel_lvds_destroy - unregister and free LVDS structures
* @connector: connector to free
*
* Unregister the DDC bus for this connector then free the driver private
* structure.
*/
static void intel_lvds_destroy(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct intel_output *intel_output = to_intel_output(connector);
struct drm_i915_private *dev_priv = dev->dev_private;
if (intel_output->ddc_bus)
intel_i2c_destroy(intel_output->ddc_bus);
if (dev_priv->lid_notifier.notifier_call)
acpi_lid_notifier_unregister(&dev_priv->lid_notifier);
drm_sysfs_connector_remove(connector);
drm_connector_cleanup(connector);
kfree(connector);
}
static int intel_lvds_set_property(struct drm_connector *connector,
struct drm_property *property,
uint64_t value)
{
struct drm_device *dev = connector->dev;
struct intel_output *intel_output =
to_intel_output(connector);
if (property == dev->mode_config.scaling_mode_property &&
connector->encoder) {
struct drm_crtc *crtc = connector->encoder->crtc;
struct intel_lvds_priv *lvds_priv = intel_output->dev_priv;
if (value == DRM_MODE_SCALE_NONE) {
DRM_DEBUG_KMS("no scaling not supported\n");
return 0;
}
if (lvds_priv->fitting_mode == value) {
/* the LVDS scaling property is not changed */
return 0;
}
lvds_priv->fitting_mode = value;
if (crtc && crtc->enabled) {
/*
* If the CRTC is enabled, the display will be changed
* according to the new panel fitting mode.
*/
drm_crtc_helper_set_mode(crtc, &crtc->mode,
crtc->x, crtc->y, crtc->fb);
}
}
return 0;
}
static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
.dpms = intel_lvds_dpms,
.mode_fixup = intel_lvds_mode_fixup,
.prepare = intel_lvds_prepare,
.mode_set = intel_lvds_mode_set,
.commit = intel_lvds_commit,
};
static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
.get_modes = intel_lvds_get_modes,
.mode_valid = intel_lvds_mode_valid,
.best_encoder = intel_best_encoder,
};
static const struct drm_connector_funcs intel_lvds_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.save = intel_lvds_save,
.restore = intel_lvds_restore,
.detect = intel_lvds_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = intel_lvds_set_property,
.destroy = intel_lvds_destroy,
};
static void intel_lvds_enc_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
.destroy = intel_lvds_enc_destroy,
};
static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
{
DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id->ident);
return 1;
}
/* These systems claim to have LVDS, but really don't */
static const struct dmi_system_id intel_no_lvds[] = {
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Apple Mac Mini (Core series)",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Apple Mac Mini (Core 2 series)",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "MSI IM-945GSE-A",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Dell Studio Hybrid",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "AOpen Mini PC",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "AOpen Mini PC MP915",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Aopen i945GTt-VFA",
.matches = {
DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
},
},
{ } /* terminating entry */
};
/**
* intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
* @dev: drm device
* @connector: LVDS connector
*
* Find the reduced downclock for LVDS in EDID.
*/
static void intel_find_lvds_downclock(struct drm_device *dev,
struct drm_connector *connector)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_display_mode *scan, *panel_fixed_mode;
int temp_downclock;
panel_fixed_mode = dev_priv->panel_fixed_mode;
temp_downclock = panel_fixed_mode->clock;
mutex_lock(&dev->mode_config.mutex);
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 for the LVDS. In such
* case we can set the different FPx0/1 to dynamically select
* between low and high frequency.
*/
if (scan->hdisplay == panel_fixed_mode->hdisplay &&
scan->hsync_start == panel_fixed_mode->hsync_start &&
scan->hsync_end == panel_fixed_mode->hsync_end &&
scan->htotal == panel_fixed_mode->htotal &&
scan->vdisplay == panel_fixed_mode->vdisplay &&
scan->vsync_start == panel_fixed_mode->vsync_start &&
scan->vsync_end == panel_fixed_mode->vsync_end &&
scan->vtotal == panel_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;
}
}
}
mutex_unlock(&dev->mode_config.mutex);
if (temp_downclock < panel_fixed_mode->clock &&
i915_lvds_downclock) {
/* We found the downclock for LVDS. */
dev_priv->lvds_downclock_avail = 1;
dev_priv->lvds_downclock = temp_downclock;
DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
"Normal clock %dKhz, downclock %dKhz\n",
panel_fixed_mode->clock, temp_downclock);
}
return;
}
/*
* Enumerate the child dev array parsed from VBT to check whether
* the LVDS is present.
* If it is present, return 1.
* If it is not present, return false.
* If no child dev is parsed from VBT, it assumes that the LVDS is present.
* Note: The addin_offset should also be checked for LVDS panel.
* Only when it is non-zero, it is assumed that it is present.
*/
static int lvds_is_present_in_vbt(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct child_device_config *p_child;
int i, ret;
if (!dev_priv->child_dev_num)
return 1;
ret = 0;
for (i = 0; i < dev_priv->child_dev_num; i++) {
p_child = dev_priv->child_dev + i;
/*
* If the device type is not LFP, continue.
* If the device type is 0x22, it is also regarded as LFP.
*/
if (p_child->device_type != DEVICE_TYPE_INT_LFP &&
p_child->device_type != DEVICE_TYPE_LFP)
continue;
/* The addin_offset should be checked. Only when it is
* non-zero, it is regarded as present.
*/
if (p_child->addin_offset) {
ret = 1;
break;
}
}
return ret;
}
/**
* intel_lvds_init - setup LVDS connectors on this device
* @dev: drm device
*
* Create the connector, register the LVDS DDC bus, and try to figure out what
* modes we can display on the LVDS panel (if present).
*/
void intel_lvds_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_output *intel_output;
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_display_mode *scan; /* *modes, *bios_mode; */
struct drm_crtc *crtc;
struct intel_lvds_priv *lvds_priv;
u32 lvds;
int pipe, gpio = GPIOC;
/* Skip init on machines we know falsely report LVDS */
if (dmi_check_system(intel_no_lvds))
return;
if (!lvds_is_present_in_vbt(dev)) {
DRM_DEBUG_KMS("LVDS is not present in VBT\n");
return;
}
if (HAS_PCH_SPLIT(dev)) {
if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
return;
if (dev_priv->edp_support) {
DRM_DEBUG_KMS("disable LVDS for eDP support\n");
return;
}
gpio = PCH_GPIOC;
}
intel_output = kzalloc(sizeof(struct intel_output) +
sizeof(struct intel_lvds_priv), GFP_KERNEL);
if (!intel_output) {
return;
}
connector = &intel_output->base;
encoder = &intel_output->enc;
drm_connector_init(dev, &intel_output->base, &intel_lvds_connector_funcs,
DRM_MODE_CONNECTOR_LVDS);
drm_encoder_init(dev, &intel_output->enc, &intel_lvds_enc_funcs,
DRM_MODE_ENCODER_LVDS);
drm_mode_connector_attach_encoder(&intel_output->base, &intel_output->enc);
intel_output->type = INTEL_OUTPUT_LVDS;
intel_output->clone_mask = (1 << INTEL_LVDS_CLONE_BIT);
intel_output->crtc_mask = (1 << 1);
drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
connector->display_info.subpixel_order = SubPixelHorizontalRGB;
connector->interlace_allowed = false;
connector->doublescan_allowed = false;
lvds_priv = (struct intel_lvds_priv *)(intel_output + 1);
intel_output->dev_priv = lvds_priv;
/* create the scaling mode property */
drm_mode_create_scaling_mode_property(dev);
/*
* the initial panel fitting mode will be FULL_SCREEN.
*/
drm_connector_attach_property(&intel_output->base,
dev->mode_config.scaling_mode_property,
DRM_MODE_SCALE_FULLSCREEN);
lvds_priv->fitting_mode = DRM_MODE_SCALE_FULLSCREEN;
/*
* LVDS discovery:
* 1) check for EDID on DDC
* 2) check for VBT data
* 3) check to see if LVDS is already on
* if none of the above, no panel
* 4) make sure lid is open
* if closed, act like it's not there for now
*/
/* Set up the DDC bus. */
intel_output->ddc_bus = intel_i2c_create(dev, gpio, "LVDSDDC_C");
if (!intel_output->ddc_bus) {
dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
"failed.\n");
goto failed;
}
/*
* Attempt to get the fixed panel mode from DDC. Assume that the
* preferred mode is the right one.
*/
intel_ddc_get_modes(intel_output);
list_for_each_entry(scan, &connector->probed_modes, head) {
mutex_lock(&dev->mode_config.mutex);
if (scan->type & DRM_MODE_TYPE_PREFERRED) {
dev_priv->panel_fixed_mode =
drm_mode_duplicate(dev, scan);
mutex_unlock(&dev->mode_config.mutex);
intel_find_lvds_downclock(dev, connector);
goto out;
}
mutex_unlock(&dev->mode_config.mutex);
}
/* Failed to get EDID, what about VBT? */
if (dev_priv->lfp_lvds_vbt_mode) {
mutex_lock(&dev->mode_config.mutex);
dev_priv->panel_fixed_mode =
drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
mutex_unlock(&dev->mode_config.mutex);
if (dev_priv->panel_fixed_mode) {
dev_priv->panel_fixed_mode->type |=
DRM_MODE_TYPE_PREFERRED;
goto out;
}
}
/*
* If we didn't get EDID, try checking if the panel is already turned
* on. If so, assume that whatever is currently programmed is the
* correct mode.
*/
/* Ironlake: FIXME if still fail, not try pipe mode now */
if (HAS_PCH_SPLIT(dev))
goto failed;
lvds = I915_READ(LVDS);
pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
crtc = intel_get_crtc_from_pipe(dev, pipe);
if (crtc && (lvds & LVDS_PORT_EN)) {
dev_priv->panel_fixed_mode = intel_crtc_mode_get(dev, crtc);
if (dev_priv->panel_fixed_mode) {
dev_priv->panel_fixed_mode->type |=
DRM_MODE_TYPE_PREFERRED;
goto out;
}
}
/* If we still don't have a mode after all that, give up. */
if (!dev_priv->panel_fixed_mode)
goto failed;
out:
if (HAS_PCH_SPLIT(dev)) {
u32 pwm;
/* make sure PWM is enabled */
pwm = I915_READ(BLC_PWM_CPU_CTL2);
pwm |= (PWM_ENABLE | PWM_PIPE_B);
I915_WRITE(BLC_PWM_CPU_CTL2, pwm);
pwm = I915_READ(BLC_PWM_PCH_CTL1);
pwm |= PWM_PCH_ENABLE;
I915_WRITE(BLC_PWM_PCH_CTL1, pwm);
}
dev_priv->lid_notifier.notifier_call = intel_lid_notify;
if (acpi_lid_notifier_register(&dev_priv->lid_notifier)) {
DRM_DEBUG_KMS("lid notifier registration failed\n");
dev_priv->lid_notifier.notifier_call = NULL;
}
/* keep the LVDS connector */
dev_priv->int_lvds_connector = connector;
drm_sysfs_connector_add(connector);
return;
failed:
DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
if (intel_output->ddc_bus)
intel_i2c_destroy(intel_output->ddc_bus);
drm_connector_cleanup(connector);
drm_encoder_cleanup(encoder);
kfree(intel_output);
}