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linuxdebug/drivers/gpu/drm/i915/display/skl_scaler.c

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// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include "intel_de.h"
#include "intel_display_types.h"
#include "intel_fb.h"
#include "skl_scaler.h"
#include "skl_universal_plane.h"
/*
* The hardware phase 0.0 refers to the center of the pixel.
* We want to start from the top/left edge which is phase
* -0.5. That matches how the hardware calculates the scaling
* factors (from top-left of the first pixel to bottom-right
* of the last pixel, as opposed to the pixel centers).
*
* For 4:2:0 subsampled chroma planes we obviously have to
* adjust that so that the chroma sample position lands in
* the right spot.
*
* Note that for packed YCbCr 4:2:2 formats there is no way to
* control chroma siting. The hardware simply replicates the
* chroma samples for both of the luma samples, and thus we don't
* actually get the expected MPEG2 chroma siting convention :(
* The same behaviour is observed on pre-SKL platforms as well.
*
* Theory behind the formula (note that we ignore sub-pixel
* source coordinates):
* s = source sample position
* d = destination sample position
*
* Downscaling 4:1:
* -0.5
* | 0.0
* | | 1.5 (initial phase)
* | | |
* v v v
* | s | s | s | s |
* | d |
*
* Upscaling 1:4:
* -0.5
* | -0.375 (initial phase)
* | | 0.0
* | | |
* v v v
* | s |
* | d | d | d | d |
*/
static u16 skl_scaler_calc_phase(int sub, int scale, bool chroma_cosited)
{
int phase = -0x8000;
u16 trip = 0;
if (chroma_cosited)
phase += (sub - 1) * 0x8000 / sub;
phase += scale / (2 * sub);
/*
* Hardware initial phase limited to [-0.5:1.5].
* Since the max hardware scale factor is 3.0, we
* should never actually excdeed 1.0 here.
*/
WARN_ON(phase < -0x8000 || phase > 0x18000);
if (phase < 0)
phase = 0x10000 + phase;
else
trip = PS_PHASE_TRIP;
return ((phase >> 2) & PS_PHASE_MASK) | trip;
}
#define SKL_MIN_SRC_W 8
#define SKL_MAX_SRC_W 4096
#define SKL_MIN_SRC_H 8
#define SKL_MAX_SRC_H 4096
#define SKL_MIN_DST_W 8
#define SKL_MAX_DST_W 4096
#define SKL_MIN_DST_H 8
#define SKL_MAX_DST_H 4096
#define ICL_MAX_SRC_W 5120
#define ICL_MAX_SRC_H 4096
#define ICL_MAX_DST_W 5120
#define ICL_MAX_DST_H 4096
#define MTL_MAX_SRC_W 4096
#define MTL_MAX_SRC_H 8192
#define MTL_MAX_DST_W 8192
#define MTL_MAX_DST_H 8192
#define SKL_MIN_YUV_420_SRC_W 16
#define SKL_MIN_YUV_420_SRC_H 16
static int
skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
unsigned int scaler_user, int *scaler_id,
int src_w, int src_h, int dst_w, int dst_h,
const struct drm_format_info *format,
u64 modifier, bool need_scaler)
{
struct intel_crtc_scaler_state *scaler_state =
&crtc_state->scaler_state;
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct drm_display_mode *adjusted_mode =
&crtc_state->hw.adjusted_mode;
int pipe_src_w = drm_rect_width(&crtc_state->pipe_src);
int pipe_src_h = drm_rect_height(&crtc_state->pipe_src);
int min_src_w, min_src_h, min_dst_w, min_dst_h;
int max_src_w, max_src_h, max_dst_w, max_dst_h;
/*
* Src coordinates are already rotated by 270 degrees for
* the 90/270 degree plane rotation cases (to match the
* GTT mapping), hence no need to account for rotation here.
*/
if (src_w != dst_w || src_h != dst_h)
need_scaler = true;
/*
* Scaling/fitting not supported in IF-ID mode in GEN9+
* TODO: Interlace fetch mode doesn't support YUV420 planar formats.
* Once NV12 is enabled, handle it here while allocating scaler
* for NV12.
*/
if (DISPLAY_VER(dev_priv) >= 9 && crtc_state->hw.enable &&
need_scaler && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
drm_dbg_kms(&dev_priv->drm,
"Pipe/Plane scaling not supported with IF-ID mode\n");
return -EINVAL;
}
/*
* if plane is being disabled or scaler is no more required or force detach
* - free scaler binded to this plane/crtc
* - in order to do this, update crtc->scaler_usage
*
* Here scaler state in crtc_state is set free so that
* scaler can be assigned to other user. Actual register
* update to free the scaler is done in plane/panel-fit programming.
* For this purpose crtc/plane_state->scaler_id isn't reset here.
*/
if (force_detach || !need_scaler) {
if (*scaler_id >= 0) {
scaler_state->scaler_users &= ~(1 << scaler_user);
scaler_state->scalers[*scaler_id].in_use = 0;
drm_dbg_kms(&dev_priv->drm,
"scaler_user index %u.%u: "
"Staged freeing scaler id %d scaler_users = 0x%x\n",
crtc->pipe, scaler_user, *scaler_id,
scaler_state->scaler_users);
*scaler_id = -1;
}
return 0;
}
if (format && intel_format_info_is_yuv_semiplanar(format, modifier) &&
(src_h < SKL_MIN_YUV_420_SRC_H || src_w < SKL_MIN_YUV_420_SRC_W)) {
drm_dbg_kms(&dev_priv->drm,
"Planar YUV: src dimensions not met\n");
return -EINVAL;
}
min_src_w = SKL_MIN_SRC_W;
min_src_h = SKL_MIN_SRC_H;
min_dst_w = SKL_MIN_DST_W;
min_dst_h = SKL_MIN_DST_H;
if (DISPLAY_VER(dev_priv) < 11) {
max_src_w = SKL_MAX_SRC_W;
max_src_h = SKL_MAX_SRC_H;
max_dst_w = SKL_MAX_DST_W;
max_dst_h = SKL_MAX_DST_H;
} else if (DISPLAY_VER(dev_priv) < 14) {
max_src_w = ICL_MAX_SRC_W;
max_src_h = ICL_MAX_SRC_H;
max_dst_w = ICL_MAX_DST_W;
max_dst_h = ICL_MAX_DST_H;
} else {
max_src_w = MTL_MAX_SRC_W;
max_src_h = MTL_MAX_SRC_H;
max_dst_w = MTL_MAX_DST_W;
max_dst_h = MTL_MAX_DST_H;
}
/* range checks */
if (src_w < min_src_w || src_h < min_src_h ||
dst_w < min_dst_w || dst_h < min_dst_h ||
src_w > max_src_w || src_h > max_src_h ||
dst_w > max_dst_w || dst_h > max_dst_h) {
drm_dbg_kms(&dev_priv->drm,
"scaler_user index %u.%u: src %ux%u dst %ux%u "
"size is out of scaler range\n",
crtc->pipe, scaler_user, src_w, src_h,
dst_w, dst_h);
return -EINVAL;
}
/*
* The pipe scaler does not use all the bits of PIPESRC, at least
* on the earlier platforms. So even when we're scaling a plane
* the *pipe* source size must not be too large. For simplicity
* we assume the limits match the scaler source size limits. Might
* not be 100% accurate on all platforms, but good enough for now.
*/
if (pipe_src_w > max_src_w || pipe_src_h > max_src_h) {
drm_dbg_kms(&dev_priv->drm,
"scaler_user index %u.%u: pipe src size %ux%u "
"is out of scaler range\n",
crtc->pipe, scaler_user, pipe_src_w, pipe_src_h);
return -EINVAL;
}
/* mark this plane as a scaler user in crtc_state */
scaler_state->scaler_users |= (1 << scaler_user);
drm_dbg_kms(&dev_priv->drm, "scaler_user index %u.%u: "
"staged scaling request for %ux%u->%ux%u scaler_users = 0x%x\n",
crtc->pipe, scaler_user, src_w, src_h, dst_w, dst_h,
scaler_state->scaler_users);
return 0;
}
int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state)
{
const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;
int width, height;
if (crtc_state->pch_pfit.enabled) {
width = drm_rect_width(&crtc_state->pch_pfit.dst);
height = drm_rect_height(&crtc_state->pch_pfit.dst);
} else {
width = pipe_mode->crtc_hdisplay;
height = pipe_mode->crtc_vdisplay;
}
return skl_update_scaler(crtc_state, !crtc_state->hw.active,
SKL_CRTC_INDEX,
&crtc_state->scaler_state.scaler_id,
drm_rect_width(&crtc_state->pipe_src),
drm_rect_height(&crtc_state->pipe_src),
width, height, NULL, 0,
crtc_state->pch_pfit.enabled);
}
/**
* skl_update_scaler_plane - Stages update to scaler state for a given plane.
* @crtc_state: crtc's scaler state
* @plane_state: atomic plane state to update
*
* Return
* 0 - scaler_usage updated successfully
* error - requested scaling cannot be supported or other error condition
*/
int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
struct intel_plane_state *plane_state)
{
struct intel_plane *intel_plane =
to_intel_plane(plane_state->uapi.plane);
struct drm_i915_private *dev_priv = to_i915(intel_plane->base.dev);
struct drm_framebuffer *fb = plane_state->hw.fb;
int ret;
bool force_detach = !fb || !plane_state->uapi.visible;
bool need_scaler = false;
/* Pre-gen11 and SDR planes always need a scaler for planar formats. */
if (!icl_is_hdr_plane(dev_priv, intel_plane->id) &&
fb && intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
need_scaler = true;
ret = skl_update_scaler(crtc_state, force_detach,
drm_plane_index(&intel_plane->base),
&plane_state->scaler_id,
drm_rect_width(&plane_state->uapi.src) >> 16,
drm_rect_height(&plane_state->uapi.src) >> 16,
drm_rect_width(&plane_state->uapi.dst),
drm_rect_height(&plane_state->uapi.dst),
fb ? fb->format : NULL,
fb ? fb->modifier : 0,
need_scaler);
if (ret || plane_state->scaler_id < 0)
return ret;
/* check colorkey */
if (plane_state->ckey.flags) {
drm_dbg_kms(&dev_priv->drm,
"[PLANE:%d:%s] scaling with color key not allowed",
intel_plane->base.base.id,
intel_plane->base.name);
return -EINVAL;
}
/* Check src format */
switch (fb->format->format) {
case DRM_FORMAT_RGB565:
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ABGR8888:
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_XRGB2101010:
case DRM_FORMAT_XBGR2101010:
case DRM_FORMAT_ARGB2101010:
case DRM_FORMAT_ABGR2101010:
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
case DRM_FORMAT_UYVY:
case DRM_FORMAT_VYUY:
case DRM_FORMAT_NV12:
case DRM_FORMAT_XYUV8888:
case DRM_FORMAT_P010:
case DRM_FORMAT_P012:
case DRM_FORMAT_P016:
case DRM_FORMAT_Y210:
case DRM_FORMAT_Y212:
case DRM_FORMAT_Y216:
case DRM_FORMAT_XVYU2101010:
case DRM_FORMAT_XVYU12_16161616:
case DRM_FORMAT_XVYU16161616:
break;
case DRM_FORMAT_XBGR16161616F:
case DRM_FORMAT_ABGR16161616F:
case DRM_FORMAT_XRGB16161616F:
case DRM_FORMAT_ARGB16161616F:
if (DISPLAY_VER(dev_priv) >= 11)
break;
fallthrough;
default:
drm_dbg_kms(&dev_priv->drm,
"[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",
intel_plane->base.base.id, intel_plane->base.name,
fb->base.id, fb->format->format);
return -EINVAL;
}
return 0;
}
static int glk_coef_tap(int i)
{
return i % 7;
}
static u16 glk_nearest_filter_coef(int t)
{
return t == 3 ? 0x0800 : 0x3000;
}
/*
* Theory behind setting nearest-neighbor integer scaling:
*
* 17 phase of 7 taps requires 119 coefficients in 60 dwords per set.
* The letter represents the filter tap (D is the center tap) and the number
* represents the coefficient set for a phase (0-16).
*
* +------------+------------------------+------------------------+
* |Index value | Data value coeffient 1 | Data value coeffient 2 |
* +------------+------------------------+------------------------+
* | 00h | B0 | A0 |
* +------------+------------------------+------------------------+
* | 01h | D0 | C0 |
* +------------+------------------------+------------------------+
* | 02h | F0 | E0 |
* +------------+------------------------+------------------------+
* | 03h | A1 | G0 |
* +------------+------------------------+------------------------+
* | 04h | C1 | B1 |
* +------------+------------------------+------------------------+
* | ... | ... | ... |
* +------------+------------------------+------------------------+
* | 38h | B16 | A16 |
* +------------+------------------------+------------------------+
* | 39h | D16 | C16 |
* +------------+------------------------+------------------------+
* | 3Ah | F16 | C16 |
* +------------+------------------------+------------------------+
* | 3Bh | Reserved | G16 |
* +------------+------------------------+------------------------+
*
* To enable nearest-neighbor scaling: program scaler coefficents with
* the center tap (Dxx) values set to 1 and all other values set to 0 as per
* SCALER_COEFFICIENT_FORMAT
*
*/
static void glk_program_nearest_filter_coefs(struct drm_i915_private *dev_priv,
enum pipe pipe, int id, int set)
{
int i;
intel_de_write_fw(dev_priv, GLK_PS_COEF_INDEX_SET(pipe, id, set),
PS_COEE_INDEX_AUTO_INC);
for (i = 0; i < 17 * 7; i += 2) {
u32 tmp;
int t;
t = glk_coef_tap(i);
tmp = glk_nearest_filter_coef(t);
t = glk_coef_tap(i + 1);
tmp |= glk_nearest_filter_coef(t) << 16;
intel_de_write_fw(dev_priv, GLK_PS_COEF_DATA_SET(pipe, id, set),
tmp);
}
intel_de_write_fw(dev_priv, GLK_PS_COEF_INDEX_SET(pipe, id, set), 0);
}
static u32 skl_scaler_get_filter_select(enum drm_scaling_filter filter, int set)
{
if (filter == DRM_SCALING_FILTER_NEAREST_NEIGHBOR) {
return (PS_FILTER_PROGRAMMED |
PS_Y_VERT_FILTER_SELECT(set) |
PS_Y_HORZ_FILTER_SELECT(set) |
PS_UV_VERT_FILTER_SELECT(set) |
PS_UV_HORZ_FILTER_SELECT(set));
}
return PS_FILTER_MEDIUM;
}
static void skl_scaler_setup_filter(struct drm_i915_private *dev_priv, enum pipe pipe,
int id, int set, enum drm_scaling_filter filter)
{
switch (filter) {
case DRM_SCALING_FILTER_DEFAULT:
break;
case DRM_SCALING_FILTER_NEAREST_NEIGHBOR:
glk_program_nearest_filter_coefs(dev_priv, pipe, id, set);
break;
default:
MISSING_CASE(filter);
}
}
void skl_pfit_enable(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct intel_crtc_scaler_state *scaler_state =
&crtc_state->scaler_state;
const struct drm_rect *dst = &crtc_state->pch_pfit.dst;
u16 uv_rgb_hphase, uv_rgb_vphase;
enum pipe pipe = crtc->pipe;
int width = drm_rect_width(dst);
int height = drm_rect_height(dst);
int x = dst->x1;
int y = dst->y1;
int hscale, vscale;
struct drm_rect src;
int id;
u32 ps_ctrl;
if (!crtc_state->pch_pfit.enabled)
return;
if (drm_WARN_ON(&dev_priv->drm,
crtc_state->scaler_state.scaler_id < 0))
return;
drm_rect_init(&src, 0, 0,
drm_rect_width(&crtc_state->pipe_src) << 16,
drm_rect_height(&crtc_state->pipe_src) << 16);
hscale = drm_rect_calc_hscale(&src, dst, 0, INT_MAX);
vscale = drm_rect_calc_vscale(&src, dst, 0, INT_MAX);
uv_rgb_hphase = skl_scaler_calc_phase(1, hscale, false);
uv_rgb_vphase = skl_scaler_calc_phase(1, vscale, false);
id = scaler_state->scaler_id;
ps_ctrl = skl_scaler_get_filter_select(crtc_state->hw.scaling_filter, 0);
ps_ctrl |= PS_SCALER_EN | scaler_state->scalers[id].mode;
skl_scaler_setup_filter(dev_priv, pipe, id, 0,
crtc_state->hw.scaling_filter);
intel_de_write_fw(dev_priv, SKL_PS_CTRL(pipe, id), ps_ctrl);
intel_de_write_fw(dev_priv, SKL_PS_VPHASE(pipe, id),
PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_vphase));
intel_de_write_fw(dev_priv, SKL_PS_HPHASE(pipe, id),
PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_hphase));
intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(pipe, id),
x << 16 | y);
intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(pipe, id),
width << 16 | height);
}
void
skl_program_plane_scaler(struct intel_plane *plane,
const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state)
{
struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
const struct drm_framebuffer *fb = plane_state->hw.fb;
enum pipe pipe = plane->pipe;
int scaler_id = plane_state->scaler_id;
const struct intel_scaler *scaler =
&crtc_state->scaler_state.scalers[scaler_id];
int crtc_x = plane_state->uapi.dst.x1;
int crtc_y = plane_state->uapi.dst.y1;
u32 crtc_w = drm_rect_width(&plane_state->uapi.dst);
u32 crtc_h = drm_rect_height(&plane_state->uapi.dst);
u16 y_hphase, uv_rgb_hphase;
u16 y_vphase, uv_rgb_vphase;
int hscale, vscale;
u32 ps_ctrl;
hscale = drm_rect_calc_hscale(&plane_state->uapi.src,
&plane_state->uapi.dst,
0, INT_MAX);
vscale = drm_rect_calc_vscale(&plane_state->uapi.src,
&plane_state->uapi.dst,
0, INT_MAX);
/* TODO: handle sub-pixel coordinates */
if (intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier) &&
!icl_is_hdr_plane(dev_priv, plane->id)) {
y_hphase = skl_scaler_calc_phase(1, hscale, false);
y_vphase = skl_scaler_calc_phase(1, vscale, false);
/* MPEG2 chroma siting convention */
uv_rgb_hphase = skl_scaler_calc_phase(2, hscale, true);
uv_rgb_vphase = skl_scaler_calc_phase(2, vscale, false);
} else {
/* not used */
y_hphase = 0;
y_vphase = 0;
uv_rgb_hphase = skl_scaler_calc_phase(1, hscale, false);
uv_rgb_vphase = skl_scaler_calc_phase(1, vscale, false);
}
ps_ctrl = skl_scaler_get_filter_select(plane_state->hw.scaling_filter, 0);
ps_ctrl |= PS_SCALER_EN | PS_PLANE_SEL(plane->id) | scaler->mode;
skl_scaler_setup_filter(dev_priv, pipe, scaler_id, 0,
plane_state->hw.scaling_filter);
intel_de_write_fw(dev_priv, SKL_PS_CTRL(pipe, scaler_id), ps_ctrl);
intel_de_write_fw(dev_priv, SKL_PS_VPHASE(pipe, scaler_id),
PS_Y_PHASE(y_vphase) | PS_UV_RGB_PHASE(uv_rgb_vphase));
intel_de_write_fw(dev_priv, SKL_PS_HPHASE(pipe, scaler_id),
PS_Y_PHASE(y_hphase) | PS_UV_RGB_PHASE(uv_rgb_hphase));
intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(pipe, scaler_id),
(crtc_x << 16) | crtc_y);
intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(pipe, scaler_id),
(crtc_w << 16) | crtc_h);
}
static void skl_detach_scaler(struct intel_crtc *crtc, int id)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
intel_de_write_fw(dev_priv, SKL_PS_CTRL(crtc->pipe, id), 0);
intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(crtc->pipe, id), 0);
intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(crtc->pipe, id), 0);
}
/*
* This function detaches (aka. unbinds) unused scalers in hardware
*/
void skl_detach_scalers(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
const struct intel_crtc_scaler_state *scaler_state =
&crtc_state->scaler_state;
int i;
/* loop through and disable scalers that aren't in use */
for (i = 0; i < crtc->num_scalers; i++) {
if (!scaler_state->scalers[i].in_use)
skl_detach_scaler(crtc, i);
}
}
void skl_scaler_disable(const struct intel_crtc_state *old_crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
int i;
for (i = 0; i < crtc->num_scalers; i++)
skl_detach_scaler(crtc, i);
}
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