#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)
struct intel_crtc_state *pipe_config,
int fitting_mode)
{
- struct drm_display_mode *adjusted_mode;
- int x, y, width, height;
-
- adjusted_mode = &pipe_config->base.adjusted_mode;
-
- x = y = width = height = 0;
+ const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
+ int x = 0, y = 0, width = 0, 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) {
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;
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:
}
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)
static void i965_scale_aspect(struct intel_crtc_state *pipe_config,
u32 *pfit_control)
{
- struct drm_display_mode *adjusted_mode = &pipe_config->base.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)
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;
}
u32 *border)
{
struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
- 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;
u32 bits;
/*
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);
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);
{
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->base.adjusted_mode;
+ struct drm_display_mode *adjusted_mode = &pipe_config->base.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) {
* 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;
/* 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;
}
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;
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;
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);
}
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;
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 */
mutex_unlock(&dev_priv->backlight_lock);
}
+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;
+
+ 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;
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;
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.
if (panel->backlight.device)
panel->backlight.device->props.power = FB_BLANK_POWERDOWN;
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;
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;
panel->backlight.device->props.max_brightness);
}
- dev_priv->display.enable_backlight(connector);
+ panel->backlight.enable(connector);
panel->backlight.enabled = true;
if (panel->backlight.device)
panel->backlight.device->props.power = FB_BLANK_UNBLANK;
* callback needs to take this into account.
*/
if (panel->backlight.enabled) {
- if (panel->backlight_power) {
+ if (panel->backlight.power) {
bool enable = bd->props.power == FB_BLANK_UNBLANK &&
bd->props.brightness != 0;
- panel->backlight_power(connector, enable);
+ panel->backlight.power(connector, enable);
}
} else {
bd->props.power = FB_BLANK_POWERDOWN;
#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)
{
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;
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) &&
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.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);
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);
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;
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;
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;
}
}
+ /* 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) {
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;
}
}
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;
Code Review / kvmfornfv.git / blobdiff