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Regard whitespace Rev 6083 → Rev 6084

/drivers/video/drm/i915/intel_panel.c
30,9 → 30,13
 
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/pwm.h>
#include "intel_drv.h"
 
#define CRC_PMIC_PWM_PERIOD_NS 21333
 
void
intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
struct drm_display_mode *adjusted_mode)
98,19 → 102,15
/* 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,
struct intel_crtc_state *pipe_config,
int fitting_mode)
{
struct drm_display_mode *adjusted_mode;
int x, y, width, height;
const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
int x = 0, y = 0, width = 0, height = 0;
 
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)
if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w &&
adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h)
goto done;
 
switch (fitting_mode) {
117,35 → 117,35
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;
x = (adjusted_mode->crtc_hdisplay - width + 1)/2;
y = (adjusted_mode->crtc_vdisplay - height + 1)/2;
break;
 
case DRM_MODE_SCALE_ASPECT:
/* Scale but preserve the aspect ratio */
{
u32 scaled_width = adjusted_mode->hdisplay
u32 scaled_width = adjusted_mode->crtc_hdisplay
* pipe_config->pipe_src_h;
u32 scaled_height = pipe_config->pipe_src_w
* adjusted_mode->vdisplay;
* adjusted_mode->crtc_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;
x = (adjusted_mode->crtc_hdisplay - width + 1) / 2;
y = 0;
height = adjusted_mode->vdisplay;
height = adjusted_mode->crtc_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;
y = (adjusted_mode->crtc_vdisplay - height + 1) / 2;
x = 0;
width = adjusted_mode->hdisplay;
width = adjusted_mode->crtc_hdisplay;
} else {
x = y = 0;
width = adjusted_mode->hdisplay;
height = adjusted_mode->vdisplay;
width = adjusted_mode->crtc_hdisplay;
height = adjusted_mode->crtc_vdisplay;
}
}
break;
152,8 → 152,8
 
case DRM_MODE_SCALE_FULLSCREEN:
x = y = 0;
width = adjusted_mode->hdisplay;
height = adjusted_mode->vdisplay;
width = adjusted_mode->crtc_hdisplay;
height = adjusted_mode->crtc_vdisplay;
break;
 
default:
168,46 → 168,46
}
 
static void
centre_horizontally(struct drm_display_mode *mode,
centre_horizontally(struct drm_display_mode *adjusted_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_width = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
blank_width = adjusted_mode->crtc_hblank_end - adjusted_mode->crtc_hblank_start;
sync_pos = (blank_width - sync_width + 1) / 2;
 
border = (mode->hdisplay - width + 1) / 2;
border = (adjusted_mode->crtc_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;
adjusted_mode->crtc_hdisplay = width;
adjusted_mode->crtc_hblank_start = width + border;
adjusted_mode->crtc_hblank_end = adjusted_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;
adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hblank_start + sync_pos;
adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + sync_width;
}
 
static void
centre_vertically(struct drm_display_mode *mode,
centre_vertically(struct drm_display_mode *adjusted_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_width = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
blank_width = adjusted_mode->crtc_vblank_end - adjusted_mode->crtc_vblank_start;
sync_pos = (blank_width - sync_width + 1) / 2;
 
border = (mode->vdisplay - height + 1) / 2;
border = (adjusted_mode->crtc_vdisplay - height + 1) / 2;
 
mode->crtc_vdisplay = height;
mode->crtc_vblank_start = height + border;
mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
adjusted_mode->crtc_vdisplay = height;
adjusted_mode->crtc_vblank_start = height + border;
adjusted_mode->crtc_vblank_end = adjusted_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;
adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vblank_start + sync_pos;
adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + sync_width;
}
 
static inline u32 panel_fitter_scaling(u32 source, u32 target)
223,14 → 223,14
return (FACTOR * ratio + FACTOR/2) / FACTOR;
}
 
static void i965_scale_aspect(struct intel_crtc_config *pipe_config,
static void i965_scale_aspect(struct intel_crtc_state *pipe_config,
u32 *pfit_control)
{
struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
u32 scaled_width = adjusted_mode->hdisplay *
const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
u32 scaled_width = adjusted_mode->crtc_hdisplay *
pipe_config->pipe_src_h;
u32 scaled_height = pipe_config->pipe_src_w *
adjusted_mode->vdisplay;
adjusted_mode->crtc_vdisplay;
 
/* 965+ is easy, it does everything in hw */
if (scaled_width > scaled_height)
239,19 → 239,19
else if (scaled_width < scaled_height)
*pfit_control |= PFIT_ENABLE |
PFIT_SCALING_LETTER;
else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w)
else if (adjusted_mode->crtc_hdisplay != pipe_config->pipe_src_w)
*pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
}
 
static void i9xx_scale_aspect(struct intel_crtc_config *pipe_config,
static void i9xx_scale_aspect(struct intel_crtc_state *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 *
struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
u32 scaled_width = adjusted_mode->crtc_hdisplay *
pipe_config->pipe_src_h;
u32 scaled_height = pipe_config->pipe_src_w *
adjusted_mode->vdisplay;
adjusted_mode->crtc_vdisplay;
u32 bits;
 
/*
265,9 → 265,9
pipe_config->pipe_src_h);
 
*border = LVDS_BORDER_ENABLE;
if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) {
if (pipe_config->pipe_src_h != adjusted_mode->crtc_vdisplay) {
bits = panel_fitter_scaling(pipe_config->pipe_src_h,
adjusted_mode->vdisplay);
adjusted_mode->crtc_vdisplay);
 
*pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
bits << PFIT_VERT_SCALE_SHIFT);
281,9 → 281,9
pipe_config->pipe_src_w);
 
*border = LVDS_BORDER_ENABLE;
if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
if (pipe_config->pipe_src_w != adjusted_mode->crtc_hdisplay) {
bits = panel_fitter_scaling(pipe_config->pipe_src_w,
adjusted_mode->hdisplay);
adjusted_mode->crtc_hdisplay);
 
*pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
bits << PFIT_VERT_SCALE_SHIFT);
301,18 → 301,16
}
 
void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
struct intel_crtc_config *pipe_config,
struct intel_crtc_state *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;
struct drm_display_mode *adjusted_mode = &pipe_config->base.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)
if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w &&
adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h)
goto out;
 
switch (fitting_mode) {
338,8 → 336,8
* 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) {
if (pipe_config->pipe_src_h != adjusted_mode->crtc_vdisplay ||
pipe_config->pipe_src_w != adjusted_mode->crtc_hdisplay) {
pfit_control |= PFIT_ENABLE;
if (INTEL_INFO(dev)->gen >= 4)
pfit_control |= PFIT_SCALING_AUTO;
383,7 → 381,7
 
/* 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 ?
return *dev_priv->opregion.lid_state & 0x1 ?
connector_status_connected :
connector_status_disconnected;
}
480,7 → 478,7
return val;
}
 
static u32 bdw_get_backlight(struct intel_connector *connector)
static u32 lpt_get_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
535,6 → 533,24
return _vlv_get_backlight(dev, pipe);
}
 
static u32 bxt_get_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
struct intel_panel *panel = &connector->panel;
struct drm_i915_private *dev_priv = dev->dev_private;
 
return I915_READ(BXT_BLC_PWM_DUTY(panel->backlight.controller));
}
 
static u32 pwm_get_backlight(struct intel_connector *connector)
{
struct intel_panel *panel = &connector->panel;
int duty_ns;
 
duty_ns = pwm_get_duty_cycle(panel->backlight.pwm);
return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS);
}
 
static u32 intel_panel_get_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
545,7 → 561,7
mutex_lock(&dev_priv->backlight_lock);
 
if (panel->backlight.enabled) {
val = dev_priv->display.get_backlight(connector);
val = panel->backlight.get(connector);
val = intel_panel_compute_brightness(connector, val);
}
 
555,7 → 571,7
return val;
}
 
static void bdw_set_backlight(struct intel_connector *connector, u32 level)
static void lpt_set_backlight(struct intel_connector *connector, u32 level)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
615,16 → 631,32
I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
}
 
static void
intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
static void bxt_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;
 
I915_WRITE(BXT_BLC_PWM_DUTY(panel->backlight.controller), level);
}
 
static void pwm_set_backlight(struct intel_connector *connector, u32 level)
{
struct intel_panel *panel = &connector->panel;
int duty_ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100);
 
pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS);
}
 
static void
intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
{
struct intel_panel *panel = &connector->panel;
 
DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
 
level = intel_panel_compute_brightness(connector, level);
dev_priv->display.set_backlight(connector, level);
panel->backlight.set(connector, level);
}
 
/* set backlight brightness to level in range [0..max], scaling wrt hw min */
680,13 → 712,35
hw_level = clamp_user_to_hw(connector, user_level, user_max);
panel->backlight.level = hw_level;
 
mutex_unlock(&dev_priv->backlight_lock);
}
 
if (panel->backlight.enabled)
intel_panel_actually_set_backlight(connector, hw_level);
static void lpt_disable_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 tmp;
 
mutex_unlock(&dev_priv->backlight_lock);
intel_panel_actually_set_backlight(connector, 0);
 
/*
* Although we don't support or enable CPU PWM with LPT/SPT based
* systems, it may have been enabled prior to loading the
* driver. Disable to avoid warnings on LCPLL disable.
*
* This needs rework if we need to add support for CPU PWM on PCH split
* platforms.
*/
tmp = I915_READ(BLC_PWM_CPU_CTL2);
if (tmp & BLM_PWM_ENABLE) {
DRM_DEBUG_KMS("cpu backlight was enabled, disabling\n");
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 pch_disable_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
735,6 → 789,36
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
}
 
static void bxt_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;
u32 tmp, val;
 
intel_panel_actually_set_backlight(connector, 0);
 
tmp = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));
I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),
tmp & ~BXT_BLC_PWM_ENABLE);
 
if (panel->backlight.controller == 1) {
val = I915_READ(UTIL_PIN_CTL);
val &= ~UTIL_PIN_ENABLE;
I915_WRITE(UTIL_PIN_CTL, val);
}
}
 
static void pwm_disable_backlight(struct intel_connector *connector)
{
struct intel_panel *panel = &connector->panel;
 
/* Disable the backlight */
pwm_config(panel->backlight.pwm, 0, CRC_PMIC_PWM_PERIOD_NS);
usleep_range(2000, 3000);
pwm_disable(panel->backlight.pwm);
}
 
void intel_panel_disable_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
745,7 → 829,7
return;
 
/*
* Do not disable backlight on the vgaswitcheroo path. When switching
* Do not disable backlight on the vga_switcheroo 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.
758,12 → 842,12
mutex_lock(&dev_priv->backlight_lock);
 
panel->backlight.enabled = false;
dev_priv->display.disable_backlight(connector);
panel->backlight.disable(connector);
 
mutex_unlock(&dev_priv->backlight_lock);
}
 
static void bdw_enable_backlight(struct intel_connector *connector)
static void lpt_enable_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
871,6 → 955,14
 
/* XXX: combine this into above write? */
intel_panel_actually_set_backlight(connector, panel->backlight.level);
 
/*
* Needed to enable backlight on some 855gm models. BLC_HIST_CTL is
* 855gm only, but checking for gen2 is safe, as 855gm is the only gen2
* that has backlight.
*/
if (IS_GEN2(dev))
I915_WRITE(BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE);
}
 
static void i965_enable_backlight(struct intel_connector *connector)
939,6 → 1031,64
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
}
 
static void bxt_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 pwm_ctl, val;
 
/* To use 2nd set of backlight registers, utility pin has to be
* enabled with PWM mode.
* The field should only be changed when the utility pin is disabled
*/
if (panel->backlight.controller == 1) {
val = I915_READ(UTIL_PIN_CTL);
if (val & UTIL_PIN_ENABLE) {
DRM_DEBUG_KMS("util pin already enabled\n");
val &= ~UTIL_PIN_ENABLE;
I915_WRITE(UTIL_PIN_CTL, val);
}
 
val = 0;
if (panel->backlight.util_pin_active_low)
val |= UTIL_PIN_POLARITY;
I915_WRITE(UTIL_PIN_CTL, val | UTIL_PIN_PIPE(pipe) |
UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE);
}
 
pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));
if (pwm_ctl & BXT_BLC_PWM_ENABLE) {
DRM_DEBUG_KMS("backlight already enabled\n");
pwm_ctl &= ~BXT_BLC_PWM_ENABLE;
I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),
pwm_ctl);
}
 
I915_WRITE(BXT_BLC_PWM_FREQ(panel->backlight.controller),
panel->backlight.max);
 
intel_panel_actually_set_backlight(connector, panel->backlight.level);
 
pwm_ctl = 0;
if (panel->backlight.active_low_pwm)
pwm_ctl |= BXT_BLC_PWM_POLARITY;
 
I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl);
POSTING_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));
I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),
pwm_ctl | BXT_BLC_PWM_ENABLE);
}
 
static void pwm_enable_backlight(struct intel_connector *connector)
{
struct intel_panel *panel = &connector->panel;
 
pwm_enable(panel->backlight.pwm);
intel_panel_actually_set_backlight(connector, panel->backlight.level);
}
 
void intel_panel_enable_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
955,11 → 1105,7
 
WARN_ON(panel->backlight.max == 0);
 
if (panel->backlight.level == 0) {
panel->backlight.level = panel->backlight.max;
}
 
dev_priv->display.enable_backlight(connector);
panel->backlight.enable(connector);
panel->backlight.enabled = true;
 
mutex_unlock(&dev_priv->backlight_lock);
977,6 → 1123,23
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;
}
1079,11 → 1242,151
#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
 
/*
* Note: The setup hooks can't assume pipe is set!
* SPT: This value represents the period of the PWM stream in clock periods
* multiplied by 16 (default increment) or 128 (alternate increment selected in
* SCHICKEN_1 bit 0). PWM clock is 24 MHz.
*/
static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 mul, clock;
 
if (I915_READ(SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY)
mul = 128;
else
mul = 16;
 
clock = MHz(24);
 
return clock / (pwm_freq_hz * mul);
}
 
/*
* LPT: This value represents the period of the PWM stream in clock periods
* multiplied by 128 (default increment) or 16 (alternate increment, selected in
* LPT SOUTH_CHICKEN2 register bit 5).
*/
static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 mul, clock;
 
if (I915_READ(SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY)
mul = 16;
else
mul = 128;
 
if (dev_priv->pch_id == INTEL_PCH_LPT_DEVICE_ID_TYPE)
clock = MHz(135); /* LPT:H */
else
clock = MHz(24); /* LPT:LP */
 
return clock / (pwm_freq_hz * mul);
}
 
/*
* ILK/SNB/IVB: This value represents the period of the PWM stream in PCH
* display raw clocks multiplied by 128.
*/
static u32 pch_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
struct drm_device *dev = connector->base.dev;
int clock = MHz(intel_pch_rawclk(dev));
 
return clock / (pwm_freq_hz * 128);
}
 
/*
* Gen2: This field determines the number of time base events (display core
* clock frequency/32) in total for a complete cycle of modulated backlight
* control.
*
* XXX: Query mode clock or hardware clock and program PWM modulation frequency
* appropriately when it's 0. Use VBT and/or sane defaults.
* Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock)
* divided by 32.
*/
static u32 i9xx_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int clock;
 
if (IS_PINEVIEW(dev))
clock = intel_hrawclk(dev);
else
clock = 1000 * dev_priv->display.get_display_clock_speed(dev);
 
return clock / (pwm_freq_hz * 32);
}
 
/*
* Gen4: This value represents the period of the PWM stream in display core
* clocks multiplied by 128.
*/
static u32 i965_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int clock = 1000 * dev_priv->display.get_display_clock_speed(dev);
 
return clock / (pwm_freq_hz * 128);
}
 
/*
* VLV: This value represents the period of the PWM stream in display core
* clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks
* multiplied by 16. CHV uses a 19.2MHz S0IX clock.
*/
static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int clock;
 
if ((I915_READ(CBR1_VLV) & CBR_PWM_CLOCK_MUX_SELECT) == 0) {
if (IS_CHERRYVIEW(dev))
return KHz(19200) / (pwm_freq_hz * 16);
else
return MHz(25) / (pwm_freq_hz * 16);
} else {
clock = intel_hrawclk(dev);
return MHz(clock) / (pwm_freq_hz * 128);
}
}
 
static u32 get_backlight_max_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;
u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz;
u32 pwm;
 
if (!pwm_freq_hz) {
DRM_DEBUG_KMS("backlight frequency not specified in VBT\n");
return 0;
}
 
if (!panel->backlight.hz_to_pwm) {
DRM_DEBUG_KMS("backlight frequency setting from VBT currently not supported on this platform\n");
return 0;
}
 
pwm = panel->backlight.hz_to_pwm(connector, pwm_freq_hz);
if (!pwm) {
DRM_DEBUG_KMS("backlight frequency conversion failed\n");
return 0;
}
 
DRM_DEBUG_KMS("backlight frequency %u Hz from VBT\n", pwm_freq_hz);
 
return pwm;
}
 
/*
* Note: The setup hooks can't assume pipe is set!
*/
static u32 get_backlight_min_vbt(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
1110,7 → 1413,7
return scale(min, 0, 255, 0, panel->backlight.max);
}
 
static int bdw_setup_backlight(struct intel_connector *connector, enum pipe unused)
static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
1122,12 → 1425,16
 
pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
panel->backlight.max = pch_ctl2 >> 16;
 
if (!panel->backlight.max)
panel->backlight.max = get_backlight_max_vbt(connector);
 
if (!panel->backlight.max)
return -ENODEV;
 
panel->backlight.min = get_backlight_min_vbt(connector);
 
val = bdw_get_backlight(connector);
val = lpt_get_backlight(connector);
panel->backlight.level = intel_panel_compute_brightness(connector, val);
 
panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&
1148,7 → 1455,11
 
pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
panel->backlight.max = pch_ctl2 >> 16;
 
if (!panel->backlight.max)
panel->backlight.max = get_backlight_max_vbt(connector);
 
if (!panel->backlight.max)
return -ENODEV;
 
panel->backlight.min = get_backlight_min_vbt(connector);
1179,12 → 1490,18
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) {
panel->backlight.max = get_backlight_max_vbt(connector);
panel->backlight.max >>= 1;
}
 
if (!panel->backlight.max)
return -ENODEV;
 
if (panel->backlight.combination_mode)
panel->backlight.max *= 0xff;
 
panel->backlight.min = get_backlight_min_vbt(connector);
 
val = i9xx_get_backlight(connector);
1208,12 → 1525,16
 
ctl = I915_READ(BLC_PWM_CTL);
panel->backlight.max = ctl >> 16;
if (panel->backlight.combination_mode)
panel->backlight.max *= 0xff;
 
if (!panel->backlight.max)
panel->backlight.max = get_backlight_max_vbt(connector);
 
if (!panel->backlight.max)
return -ENODEV;
 
if (panel->backlight.combination_mode)
panel->backlight.max *= 0xff;
 
panel->backlight.min = get_backlight_min_vbt(connector);
 
val = i9xx_get_backlight(connector);
1230,21 → 1551,8
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_panel *panel = &connector->panel;
enum pipe p;
u32 ctl, ctl2, val;
 
for_each_pipe(dev_priv, p) {
u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(p));
 
/* 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(p), (0xf42 << 16) |
cur_val);
}
 
if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
return -ENODEV;
 
1253,7 → 1561,11
 
ctl = I915_READ(VLV_BLC_PWM_CTL(pipe));
panel->backlight.max = ctl >> 16;
 
if (!panel->backlight.max)
panel->backlight.max = get_backlight_max_vbt(connector);
 
if (!panel->backlight.max)
return -ENODEV;
 
panel->backlight.min = get_backlight_min_vbt(connector);
1267,6 → 1579,86
return 0;
}
 
static int
bxt_setup_backlight(struct intel_connector *connector, enum pipe unused)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_panel *panel = &connector->panel;
u32 pwm_ctl, val;
 
/*
* For BXT hard coding the Backlight controller to 0.
* TODO : Read the controller value from VBT and generalize
*/
panel->backlight.controller = 0;
 
pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));
 
/* Keeping the check if controller 1 is to be programmed.
* This will come into affect once the VBT parsing
* is fixed for controller selection, and controller 1 is used
* for a prticular display configuration.
*/
if (panel->backlight.controller == 1) {
val = I915_READ(UTIL_PIN_CTL);
panel->backlight.util_pin_active_low =
val & UTIL_PIN_POLARITY;
}
 
panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY;
panel->backlight.max =
I915_READ(BXT_BLC_PWM_FREQ(panel->backlight.controller));
 
if (!panel->backlight.max)
panel->backlight.max = get_backlight_max_vbt(connector);
 
if (!panel->backlight.max)
return -ENODEV;
 
val = bxt_get_backlight(connector);
panel->backlight.level = intel_panel_compute_brightness(connector, val);
 
panel->backlight.enabled = (pwm_ctl & BXT_BLC_PWM_ENABLE) &&
panel->backlight.level != 0;
 
return 0;
}
 
static int pwm_setup_backlight(struct intel_connector *connector,
enum pipe pipe)
{
struct drm_device *dev = connector->base.dev;
struct intel_panel *panel = &connector->panel;
int retval;
 
/* Get the PWM chip for backlight control */
panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight");
if (IS_ERR(panel->backlight.pwm)) {
DRM_ERROR("Failed to own the pwm chip\n");
panel->backlight.pwm = NULL;
return -ENODEV;
}
 
retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS,
CRC_PMIC_PWM_PERIOD_NS);
if (retval < 0) {
DRM_ERROR("Failed to configure the pwm chip\n");
pwm_put(panel->backlight.pwm);
panel->backlight.pwm = NULL;
return retval;
}
 
panel->backlight.min = 0; /* 0% */
panel->backlight.max = 100; /* 100% */
panel->backlight.level = DIV_ROUND_UP(
pwm_get_duty_cycle(panel->backlight.pwm) * 100,
CRC_PMIC_PWM_PERIOD_NS);
panel->backlight.enabled = panel->backlight.level != 0;
 
return 0;
}
 
int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe)
{
struct drm_device *dev = connector->dev;
1284,9 → 1676,13
}
}
 
/* ensure intel_panel has been initialized first */
if (WARN_ON(!panel->backlight.setup))
return -ENODEV;
 
/* set level and max in panel struct */
mutex_lock(&dev_priv->backlight_lock);
ret = dev_priv->display.setup_backlight(intel_connector, pipe);
ret = panel->backlight.setup(intel_connector, pipe);
mutex_unlock(&dev_priv->backlight_lock);
 
if (ret) {
1310,44 → 1706,74
struct intel_connector *intel_connector = to_intel_connector(connector);
struct intel_panel *panel = &intel_connector->panel;
 
/* dispose of the pwm */
if (panel->backlight.pwm)
pwm_put(panel->backlight.pwm);
 
panel->backlight.present = false;
}
 
/* Set up chip specific backlight functions */
void intel_panel_init_backlight_funcs(struct drm_device *dev)
static void
intel_panel_init_backlight_funcs(struct intel_panel *panel)
{
struct intel_connector *intel_connector =
container_of(panel, struct intel_connector, panel);
struct drm_device *dev = intel_connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
 
if (IS_BROADWELL(dev) || (INTEL_INFO(dev)->gen >= 9)) {
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;
if (IS_BROXTON(dev)) {
panel->backlight.setup = bxt_setup_backlight;
panel->backlight.enable = bxt_enable_backlight;
panel->backlight.disable = bxt_disable_backlight;
panel->backlight.set = bxt_set_backlight;
panel->backlight.get = bxt_get_backlight;
} else if (HAS_PCH_LPT(dev) || HAS_PCH_SPT(dev)) {
panel->backlight.setup = lpt_setup_backlight;
panel->backlight.enable = lpt_enable_backlight;
panel->backlight.disable = lpt_disable_backlight;
panel->backlight.set = lpt_set_backlight;
panel->backlight.get = lpt_get_backlight;
if (HAS_PCH_LPT(dev))
panel->backlight.hz_to_pwm = lpt_hz_to_pwm;
else
panel->backlight.hz_to_pwm = spt_hz_to_pwm;
} 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;
panel->backlight.setup = pch_setup_backlight;
panel->backlight.enable = pch_enable_backlight;
panel->backlight.disable = pch_disable_backlight;
panel->backlight.set = pch_set_backlight;
panel->backlight.get = pch_get_backlight;
panel->backlight.hz_to_pwm = pch_hz_to_pwm;
} 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;
if (dev_priv->vbt.has_mipi) {
panel->backlight.setup = pwm_setup_backlight;
panel->backlight.enable = pwm_enable_backlight;
panel->backlight.disable = pwm_disable_backlight;
panel->backlight.set = pwm_set_backlight;
panel->backlight.get = pwm_get_backlight;
} else {
panel->backlight.setup = vlv_setup_backlight;
panel->backlight.enable = vlv_enable_backlight;
panel->backlight.disable = vlv_disable_backlight;
panel->backlight.set = vlv_set_backlight;
panel->backlight.get = vlv_get_backlight;
panel->backlight.hz_to_pwm = vlv_hz_to_pwm;
}
} 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;
panel->backlight.setup = i965_setup_backlight;
panel->backlight.enable = i965_enable_backlight;
panel->backlight.disable = i965_disable_backlight;
panel->backlight.set = i9xx_set_backlight;
panel->backlight.get = i9xx_get_backlight;
panel->backlight.hz_to_pwm = i965_hz_to_pwm;
} 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;
panel->backlight.setup = i9xx_setup_backlight;
panel->backlight.enable = i9xx_enable_backlight;
panel->backlight.disable = i9xx_disable_backlight;
panel->backlight.set = i9xx_set_backlight;
panel->backlight.get = i9xx_get_backlight;
panel->backlight.hz_to_pwm = i9xx_hz_to_pwm;
}
}
 
1355,6 → 1781,8
struct drm_display_mode *fixed_mode,
struct drm_display_mode *downclock_mode)
{
intel_panel_init_backlight_funcs(panel);
 
panel->fixed_mode = fixed_mode;
panel->downclock_mode = downclock_mode;