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OpenCloudOS-Kernel/drivers/gpu/drm/i915/display/intel_panel.c

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/*
* Copyright © 2006-2010 Intel Corporation
* Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
* Dave Airlie <airlied@linux.ie>
* Jesse Barnes <jesse.barnes@intel.com>
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#include <linux/kernel.h>
#include <linux/pwm.h>
#include "intel_backlight.h"
#include "intel_connector.h"
#include "intel_de.h"
#include "intel_display_types.h"
#include "intel_panel.h"
bool intel_panel_use_ssc(struct drm_i915_private *i915)
{
if (i915->params.panel_use_ssc >= 0)
return i915->params.panel_use_ssc != 0;
return i915->vbt.lvds_use_ssc
&& !(i915->quirks & QUIRK_LVDS_SSC_DISABLE);
}
int intel_panel_compute_config(struct intel_connector *connector,
struct drm_display_mode *adjusted_mode)
{
const struct drm_display_mode *fixed_mode = connector->panel.fixed_mode;
if (!fixed_mode)
return 0;
/*
* We don't want to lie too much to the user about the refresh
* rate they're going to get. But we have to allow a bit of latitude
* for Xorg since it likes to automagically cook up modes with slightly
* off refresh rates.
*/
if (abs(drm_mode_vrefresh(adjusted_mode) - drm_mode_vrefresh(fixed_mode)) > 1) {
drm_dbg_kms(connector->base.dev,
"[CONNECTOR:%d:%s] Requested mode vrefresh (%d Hz) does not match fixed mode vrefresh (%d Hz)\n",
connector->base.base.id, connector->base.name,
drm_mode_vrefresh(adjusted_mode), drm_mode_vrefresh(fixed_mode));
return -EINVAL;
}
drm_mode_copy(adjusted_mode, fixed_mode);
drm_mode_set_crtcinfo(adjusted_mode, 0);
return 0;
}
static bool is_downclock_mode(const struct drm_display_mode *downclock_mode,
const struct drm_display_mode *fixed_mode)
{
return drm_mode_match(downclock_mode, fixed_mode,
DRM_MODE_MATCH_TIMINGS |
DRM_MODE_MATCH_FLAGS |
DRM_MODE_MATCH_3D_FLAGS) &&
downclock_mode->clock < fixed_mode->clock;
}
struct drm_display_mode *
intel_panel_edid_downclock_mode(struct intel_connector *connector,
const struct drm_display_mode *fixed_mode)
{
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
const struct drm_display_mode *scan, *best_mode = NULL;
struct drm_display_mode *downclock_mode;
int best_clock = fixed_mode->clock;
list_for_each_entry(scan, &connector->base.probed_modes, head) {
/*
* If one mode has the same resolution with the fixed_panel
* mode while they have the different refresh rate, it means
* that the reduced downclock is found. In such
* case we can set the different FPx0/1 to dynamically select
* between low and high frequency.
*/
if (is_downclock_mode(scan, fixed_mode) &&
scan->clock < best_clock) {
/*
* The downclock is already found. But we
* expect to find the lower downclock.
*/
best_clock = scan->clock;
best_mode = scan;
}
}
if (!best_mode)
return NULL;
downclock_mode = drm_mode_duplicate(&dev_priv->drm, best_mode);
if (!downclock_mode)
return NULL;
drm_dbg_kms(&dev_priv->drm,
"[CONNECTOR:%d:%s] using downclock mode from EDID: ",
connector->base.base.id, connector->base.name);
drm_mode_debug_printmodeline(downclock_mode);
return downclock_mode;
}
struct drm_display_mode *
intel_panel_edid_fixed_mode(struct intel_connector *connector)
{
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
const struct drm_display_mode *scan;
struct drm_display_mode *fixed_mode;
if (list_empty(&connector->base.probed_modes))
return NULL;
/* prefer fixed mode from EDID if available */
list_for_each_entry(scan, &connector->base.probed_modes, head) {
if ((scan->type & DRM_MODE_TYPE_PREFERRED) == 0)
continue;
fixed_mode = drm_mode_duplicate(&dev_priv->drm, scan);
if (!fixed_mode)
return NULL;
drm_dbg_kms(&dev_priv->drm,
"[CONNECTOR:%d:%s] using preferred mode from EDID: ",
connector->base.base.id, connector->base.name);
drm_mode_debug_printmodeline(fixed_mode);
return fixed_mode;
}
scan = list_first_entry(&connector->base.probed_modes,
typeof(*scan), head);
fixed_mode = drm_mode_duplicate(&dev_priv->drm, scan);
if (!fixed_mode)
return NULL;
fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
drm_dbg_kms(&dev_priv->drm,
"[CONNECTOR:%d:%s] using first mode from EDID: ",
connector->base.base.id, connector->base.name);
drm_mode_debug_printmodeline(fixed_mode);
return fixed_mode;
}
struct drm_display_mode *
intel_panel_vbt_fixed_mode(struct intel_connector *connector)
{
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
struct drm_display_info *info = &connector->base.display_info;
struct drm_display_mode *fixed_mode;
if (!dev_priv->vbt.lfp_lvds_vbt_mode)
return NULL;
fixed_mode = drm_mode_duplicate(&dev_priv->drm,
dev_priv->vbt.lfp_lvds_vbt_mode);
if (!fixed_mode)
return NULL;
fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s] using mode from VBT: ",
connector->base.base.id, connector->base.name);
drm_mode_debug_printmodeline(fixed_mode);
info->width_mm = fixed_mode->width_mm;
info->height_mm = fixed_mode->height_mm;
return fixed_mode;
}
/* adjusted_mode has been preset to be the panel's fixed mode */
static int pch_panel_fitting(struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state)
{
const struct drm_display_mode *adjusted_mode =
&crtc_state->hw.adjusted_mode;
int x, y, width, height;
/* Native modes don't need fitting */
if (adjusted_mode->crtc_hdisplay == crtc_state->pipe_src_w &&
adjusted_mode->crtc_vdisplay == crtc_state->pipe_src_h &&
crtc_state->output_format != INTEL_OUTPUT_FORMAT_YCBCR420)
return 0;
switch (conn_state->scaling_mode) {
case DRM_MODE_SCALE_CENTER:
width = crtc_state->pipe_src_w;
height = crtc_state->pipe_src_h;
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->crtc_hdisplay
* crtc_state->pipe_src_h;
u32 scaled_height = crtc_state->pipe_src_w
* adjusted_mode->crtc_vdisplay;
if (scaled_width > scaled_height) { /* pillar */
width = scaled_height / crtc_state->pipe_src_h;
if (width & 1)
width++;
x = (adjusted_mode->crtc_hdisplay - width + 1) / 2;
y = 0;
height = adjusted_mode->crtc_vdisplay;
} else if (scaled_width < scaled_height) { /* letter */
height = scaled_width / crtc_state->pipe_src_w;
if (height & 1)
height++;
y = (adjusted_mode->crtc_vdisplay - height + 1) / 2;
x = 0;
width = adjusted_mode->crtc_hdisplay;
} else {
x = y = 0;
width = adjusted_mode->crtc_hdisplay;
height = adjusted_mode->crtc_vdisplay;
}
}
break;
case DRM_MODE_SCALE_NONE:
WARN_ON(adjusted_mode->crtc_hdisplay != crtc_state->pipe_src_w);
WARN_ON(adjusted_mode->crtc_vdisplay != crtc_state->pipe_src_h);
fallthrough;
case DRM_MODE_SCALE_FULLSCREEN:
x = y = 0;
width = adjusted_mode->crtc_hdisplay;
height = adjusted_mode->crtc_vdisplay;
break;
default:
MISSING_CASE(conn_state->scaling_mode);
return -EINVAL;
}
drm_rect_init(&crtc_state->pch_pfit.dst,
x, y, width, height);
crtc_state->pch_pfit.enabled = true;
return 0;
}
static void
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 = 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 = (adjusted_mode->crtc_hdisplay - width + 1) / 2;
border += border & 1; /* make the border even */
adjusted_mode->crtc_hdisplay = width;
adjusted_mode->crtc_hblank_start = width + border;
adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_hblank_start + blank_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 *adjusted_mode,
int height)
{
u32 border, sync_pos, blank_width, sync_width;
/* keep the vsync and vblank widths constant */
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 = (adjusted_mode->crtc_vdisplay - height + 1) / 2;
adjusted_mode->crtc_vdisplay = height;
adjusted_mode->crtc_vblank_start = height + border;
adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vblank_start + blank_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 u32 panel_fitter_scaling(u32 source, u32 target)
{
/*
* Floating point operation is not supported. So the FACTOR
* is defined, which can avoid the floating point computation
* when calculating the panel ratio.
*/
#define ACCURACY 12
#define FACTOR (1 << ACCURACY)
u32 ratio = source * FACTOR / target;
return (FACTOR * ratio + FACTOR/2) / FACTOR;
}
static void i965_scale_aspect(struct intel_crtc_state *crtc_state,
u32 *pfit_control)
{
const struct drm_display_mode *adjusted_mode =
&crtc_state->hw.adjusted_mode;
u32 scaled_width = adjusted_mode->crtc_hdisplay *
crtc_state->pipe_src_h;
u32 scaled_height = crtc_state->pipe_src_w *
adjusted_mode->crtc_vdisplay;
/* 965+ is easy, it does everything in hw */
if (scaled_width > scaled_height)
*pfit_control |= PFIT_ENABLE |
PFIT_SCALING_PILLAR;
else if (scaled_width < scaled_height)
*pfit_control |= PFIT_ENABLE |
PFIT_SCALING_LETTER;
else if (adjusted_mode->crtc_hdisplay != crtc_state->pipe_src_w)
*pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
}
static void i9xx_scale_aspect(struct intel_crtc_state *crtc_state,
u32 *pfit_control, u32 *pfit_pgm_ratios,
u32 *border)
{
struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
u32 scaled_width = adjusted_mode->crtc_hdisplay *
crtc_state->pipe_src_h;
u32 scaled_height = crtc_state->pipe_src_w *
adjusted_mode->crtc_vdisplay;
u32 bits;
/*
* For earlier chips we have to calculate the scaling
* ratio by hand and program it into the
* PFIT_PGM_RATIO register
*/
if (scaled_width > scaled_height) { /* pillar */
centre_horizontally(adjusted_mode,
scaled_height /
crtc_state->pipe_src_h);
*border = LVDS_BORDER_ENABLE;
if (crtc_state->pipe_src_h != adjusted_mode->crtc_vdisplay) {
bits = panel_fitter_scaling(crtc_state->pipe_src_h,
adjusted_mode->crtc_vdisplay);
*pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
bits << PFIT_VERT_SCALE_SHIFT);
*pfit_control |= (PFIT_ENABLE |
VERT_INTERP_BILINEAR |
HORIZ_INTERP_BILINEAR);
}
} else if (scaled_width < scaled_height) { /* letter */
centre_vertically(adjusted_mode,
scaled_width /
crtc_state->pipe_src_w);
*border = LVDS_BORDER_ENABLE;
if (crtc_state->pipe_src_w != adjusted_mode->crtc_hdisplay) {
bits = panel_fitter_scaling(crtc_state->pipe_src_w,
adjusted_mode->crtc_hdisplay);
*pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
bits << PFIT_VERT_SCALE_SHIFT);
*pfit_control |= (PFIT_ENABLE |
VERT_INTERP_BILINEAR |
HORIZ_INTERP_BILINEAR);
}
} else {
/* Aspects match, Let hw scale both directions */
*pfit_control |= (PFIT_ENABLE |
VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
VERT_INTERP_BILINEAR |
HORIZ_INTERP_BILINEAR);
}
}
static int gmch_panel_fitting(struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
/* Native modes don't need fitting */
if (adjusted_mode->crtc_hdisplay == crtc_state->pipe_src_w &&
adjusted_mode->crtc_vdisplay == crtc_state->pipe_src_h)
goto out;
switch (conn_state->scaling_mode) {
case DRM_MODE_SCALE_CENTER:
/*
* For centered modes, we have to calculate border widths &
* heights and modify the values programmed into the CRTC.
*/
centre_horizontally(adjusted_mode, crtc_state->pipe_src_w);
centre_vertically(adjusted_mode, crtc_state->pipe_src_h);
border = LVDS_BORDER_ENABLE;
break;
case DRM_MODE_SCALE_ASPECT:
/* Scale but preserve the aspect ratio */
if (DISPLAY_VER(dev_priv) >= 4)
i965_scale_aspect(crtc_state, &pfit_control);
else
i9xx_scale_aspect(crtc_state, &pfit_control,
&pfit_pgm_ratios, &border);
break;
case DRM_MODE_SCALE_FULLSCREEN:
/*
* Full scaling, even if it changes the aspect ratio.
* Fortunately this is all done for us in hw.
*/
if (crtc_state->pipe_src_h != adjusted_mode->crtc_vdisplay ||
crtc_state->pipe_src_w != adjusted_mode->crtc_hdisplay) {
pfit_control |= PFIT_ENABLE;
if (DISPLAY_VER(dev_priv) >= 4)
pfit_control |= PFIT_SCALING_AUTO;
else
pfit_control |= (VERT_AUTO_SCALE |
VERT_INTERP_BILINEAR |
HORIZ_AUTO_SCALE |
HORIZ_INTERP_BILINEAR);
}
break;
default:
MISSING_CASE(conn_state->scaling_mode);
return -EINVAL;
}
/* 965+ wants fuzzy fitting */
/* FIXME: handle multiple panels by failing gracefully */
if (DISPLAY_VER(dev_priv) >= 4)
pfit_control |= PFIT_PIPE(crtc->pipe) | PFIT_FILTER_FUZZY;
out:
if ((pfit_control & PFIT_ENABLE) == 0) {
pfit_control = 0;
pfit_pgm_ratios = 0;
}
/* Make sure pre-965 set dither correctly for 18bpp panels. */
if (DISPLAY_VER(dev_priv) < 4 && crtc_state->pipe_bpp == 18)
pfit_control |= PANEL_8TO6_DITHER_ENABLE;
crtc_state->gmch_pfit.control = pfit_control;
crtc_state->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
crtc_state->gmch_pfit.lvds_border_bits = border;
return 0;
}
int intel_panel_fitting(struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *i915 = to_i915(crtc->base.dev);
if (HAS_GMCH(i915))
return gmch_panel_fitting(crtc_state, conn_state);
else
return pch_panel_fitting(crtc_state, conn_state);
}
enum drm_connector_status
intel_panel_detect(struct drm_connector *connector, bool force)
{
struct drm_i915_private *i915 = to_i915(connector->dev);
if (!INTEL_DISPLAY_ENABLED(i915))
return connector_status_disconnected;
return connector_status_connected;
}
enum drm_mode_status
intel_panel_mode_valid(struct intel_connector *connector,
const struct drm_display_mode *mode)
{
const struct drm_display_mode *fixed_mode = connector->panel.fixed_mode;
if (!fixed_mode)
return MODE_OK;
if (mode->hdisplay != fixed_mode->hdisplay)
return MODE_PANEL;
if (mode->vdisplay != fixed_mode->vdisplay)
return MODE_PANEL;
if (drm_mode_vrefresh(mode) != drm_mode_vrefresh(fixed_mode))
return MODE_PANEL;
return MODE_OK;
}
int intel_panel_init(struct intel_panel *panel,
struct drm_display_mode *fixed_mode,
struct drm_display_mode *downclock_mode)
{
intel_backlight_init_funcs(panel);
panel->fixed_mode = fixed_mode;
panel->downclock_mode = downclock_mode;
return 0;
}
void intel_panel_fini(struct intel_panel *panel)
{
struct intel_connector *intel_connector =
container_of(panel, struct intel_connector, panel);
intel_backlight_destroy(panel);
if (panel->fixed_mode)
drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
if (panel->downclock_mode)
drm_mode_destroy(intel_connector->base.dev,
panel->downclock_mode);
}
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