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linux/drivers/gpu/drm/i915/intel_overlay.c
Daniel Vetter a9193983f4 drm/i915: fix overlay on i830M 
The overlay on the i830M has a peculiar failure mode: It works the
first time around after boot-up, but consistenly hangs the second time
it's used.

Chris Wilson has dug out a nice errata:

"1.5.12 Clock Gating Disable for Display Register
Address Offset:	06200h–06203h

"Bit 3
Ovrunit Clock Gating Disable.
0 = Clock gating controlled by unit enabling logic
1 = Disable clock gating function
DevALM Errata ALM049: Overlay Clock Gating Must be Disabled:  Overlay
& L2 Cache clock gating must be disabled in order to prevent device
hangs when turning off overlay.SW must turn off Ovrunit clock gating
(6200h) and L2 Cache clock gating (C8h)."

Now I've nowhere found that 0xc8 register and hence couldn't apply the
l2 cache workaround. But I've remembered that part of the magic that
the OVERLAY_ON/OFF commands are supposed to do is to rearrange cache
allocations so that the overlay scaler has some scratch space.

And while pondering how that could explain the hang the 2nd time we
enable the overlay, I've remembered that the old ums overlay code did
_not_ issue the OVERLAY_OFF cmd.

And indeed, disabling the OFF cmd results in the overlay working
flawlessly, so I guess we can workaround the lack of the above
workaround by simply never disabling the overlay engine once it's
enabled.

Note that we have the first part of the above w/a already implemented
in i830_init_clock_gating - leave that as-is to avoid surprises.

v2: Add a comment in the code.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=47827
Cc: stable@vger.kernel.org
Tested-by: Rhys <rhyspuk@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-23 12:57:50 +02:00

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/*
* Copyright © 2009
*
* 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:
* Daniel Vetter <daniel@ffwll.ch>
*
* Derived from Xorg ddx, xf86-video-intel, src/i830_video.c
*/
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include "i915_reg.h"
#include "intel_drv.h"
/* Limits for overlay size. According to intel doc, the real limits are:
* Y width: 4095, UV width (planar): 2047, Y height: 2047,
* UV width (planar): * 1023. But the xorg thinks 2048 for height and width. Use
* the mininum of both. */
#define IMAGE_MAX_WIDTH 2048
#define IMAGE_MAX_HEIGHT 2046 /* 2 * 1023 */
/* on 830 and 845 these large limits result in the card hanging */
#define IMAGE_MAX_WIDTH_LEGACY 1024
#define IMAGE_MAX_HEIGHT_LEGACY 1088
/* overlay register definitions */
/* OCMD register */
#define OCMD_TILED_SURFACE (0x1<<19)
#define OCMD_MIRROR_MASK (0x3<<17)
#define OCMD_MIRROR_MODE (0x3<<17)
#define OCMD_MIRROR_HORIZONTAL (0x1<<17)
#define OCMD_MIRROR_VERTICAL (0x2<<17)
#define OCMD_MIRROR_BOTH (0x3<<17)
#define OCMD_BYTEORDER_MASK (0x3<<14) /* zero for YUYV or FOURCC YUY2 */
#define OCMD_UV_SWAP (0x1<<14) /* YVYU */
#define OCMD_Y_SWAP (0x2<<14) /* UYVY or FOURCC UYVY */
#define OCMD_Y_AND_UV_SWAP (0x3<<14) /* VYUY */
#define OCMD_SOURCE_FORMAT_MASK (0xf<<10)
#define OCMD_RGB_888 (0x1<<10) /* not in i965 Intel docs */
#define OCMD_RGB_555 (0x2<<10) /* not in i965 Intel docs */
#define OCMD_RGB_565 (0x3<<10) /* not in i965 Intel docs */
#define OCMD_YUV_422_PACKED (0x8<<10)
#define OCMD_YUV_411_PACKED (0x9<<10) /* not in i965 Intel docs */
#define OCMD_YUV_420_PLANAR (0xc<<10)
#define OCMD_YUV_422_PLANAR (0xd<<10)
#define OCMD_YUV_410_PLANAR (0xe<<10) /* also 411 */
#define OCMD_TVSYNCFLIP_PARITY (0x1<<9)
#define OCMD_TVSYNCFLIP_ENABLE (0x1<<7)
#define OCMD_BUF_TYPE_MASK (0x1<<5)
#define OCMD_BUF_TYPE_FRAME (0x0<<5)
#define OCMD_BUF_TYPE_FIELD (0x1<<5)
#define OCMD_TEST_MODE (0x1<<4)
#define OCMD_BUFFER_SELECT (0x3<<2)
#define OCMD_BUFFER0 (0x0<<2)
#define OCMD_BUFFER1 (0x1<<2)
#define OCMD_FIELD_SELECT (0x1<<2)
#define OCMD_FIELD0 (0x0<<1)
#define OCMD_FIELD1 (0x1<<1)
#define OCMD_ENABLE (0x1<<0)
/* OCONFIG register */
#define OCONF_PIPE_MASK (0x1<<18)
#define OCONF_PIPE_A (0x0<<18)
#define OCONF_PIPE_B (0x1<<18)
#define OCONF_GAMMA2_ENABLE (0x1<<16)
#define OCONF_CSC_MODE_BT601 (0x0<<5)
#define OCONF_CSC_MODE_BT709 (0x1<<5)
#define OCONF_CSC_BYPASS (0x1<<4)
#define OCONF_CC_OUT_8BIT (0x1<<3)
#define OCONF_TEST_MODE (0x1<<2)
#define OCONF_THREE_LINE_BUFFER (0x1<<0)
#define OCONF_TWO_LINE_BUFFER (0x0<<0)
/* DCLRKM (dst-key) register */
#define DST_KEY_ENABLE (0x1<<31)
#define CLK_RGB24_MASK 0x0
#define CLK_RGB16_MASK 0x070307
#define CLK_RGB15_MASK 0x070707
#define CLK_RGB8I_MASK 0xffffff
#define RGB16_TO_COLORKEY(c) \
(((c & 0xF800) << 8) | ((c & 0x07E0) << 5) | ((c & 0x001F) << 3))
#define RGB15_TO_COLORKEY(c) \
(((c & 0x7c00) << 9) | ((c & 0x03E0) << 6) | ((c & 0x001F) << 3))
/* overlay flip addr flag */
#define OFC_UPDATE 0x1
/* polyphase filter coefficients */
#define N_HORIZ_Y_TAPS 5
#define N_VERT_Y_TAPS 3
#define N_HORIZ_UV_TAPS 3
#define N_VERT_UV_TAPS 3
#define N_PHASES 17
#define MAX_TAPS 5
/* memory bufferd overlay registers */
struct overlay_registers {
u32 OBUF_0Y;
u32 OBUF_1Y;
u32 OBUF_0U;
u32 OBUF_0V;
u32 OBUF_1U;
u32 OBUF_1V;
u32 OSTRIDE;
u32 YRGB_VPH;
u32 UV_VPH;
u32 HORZ_PH;
u32 INIT_PHS;
u32 DWINPOS;
u32 DWINSZ;
u32 SWIDTH;
u32 SWIDTHSW;
u32 SHEIGHT;
u32 YRGBSCALE;
u32 UVSCALE;
u32 OCLRC0;
u32 OCLRC1;
u32 DCLRKV;
u32 DCLRKM;
u32 SCLRKVH;
u32 SCLRKVL;
u32 SCLRKEN;
u32 OCONFIG;
u32 OCMD;
u32 RESERVED1; /* 0x6C */
u32 OSTART_0Y;
u32 OSTART_1Y;
u32 OSTART_0U;
u32 OSTART_0V;
u32 OSTART_1U;
u32 OSTART_1V;
u32 OTILEOFF_0Y;
u32 OTILEOFF_1Y;
u32 OTILEOFF_0U;
u32 OTILEOFF_0V;
u32 OTILEOFF_1U;
u32 OTILEOFF_1V;
u32 FASTHSCALE; /* 0xA0 */
u32 UVSCALEV; /* 0xA4 */
u32 RESERVEDC[(0x200 - 0xA8) / 4]; /* 0xA8 - 0x1FC */
u16 Y_VCOEFS[N_VERT_Y_TAPS * N_PHASES]; /* 0x200 */
u16 RESERVEDD[0x100 / 2 - N_VERT_Y_TAPS * N_PHASES];
u16 Y_HCOEFS[N_HORIZ_Y_TAPS * N_PHASES]; /* 0x300 */
u16 RESERVEDE[0x200 / 2 - N_HORIZ_Y_TAPS * N_PHASES];
u16 UV_VCOEFS[N_VERT_UV_TAPS * N_PHASES]; /* 0x500 */
u16 RESERVEDF[0x100 / 2 - N_VERT_UV_TAPS * N_PHASES];
u16 UV_HCOEFS[N_HORIZ_UV_TAPS * N_PHASES]; /* 0x600 */
u16 RESERVEDG[0x100 / 2 - N_HORIZ_UV_TAPS * N_PHASES];
};
struct intel_overlay {
struct drm_device *dev;
struct intel_crtc *crtc;
struct drm_i915_gem_object *vid_bo;
struct drm_i915_gem_object *old_vid_bo;
int active;
int pfit_active;
u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
u32 color_key;
u32 brightness, contrast, saturation;
u32 old_xscale, old_yscale;
/* register access */
u32 flip_addr;
struct drm_i915_gem_object *reg_bo;
/* flip handling */
uint32_t last_flip_req;
void (*flip_tail)(struct intel_overlay *);
};
static struct overlay_registers __iomem *
intel_overlay_map_regs(struct intel_overlay *overlay)
{
drm_i915_private_t *dev_priv = overlay->dev->dev_private;
struct overlay_registers __iomem *regs;
if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
regs = (struct overlay_registers __iomem *)overlay->reg_bo->phys_obj->handle->vaddr;
else
regs = io_mapping_map_wc(dev_priv->mm.gtt_mapping,
overlay->reg_bo->gtt_offset);
return regs;
}
static void intel_overlay_unmap_regs(struct intel_overlay *overlay,
struct overlay_registers __iomem *regs)
{
if (!OVERLAY_NEEDS_PHYSICAL(overlay->dev))
io_mapping_unmap(regs);
}
static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
void (*tail)(struct intel_overlay *))
{
struct drm_device *dev = overlay->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
int ret;
BUG_ON(overlay->last_flip_req);
ret = i915_add_request(ring, NULL, &overlay->last_flip_req);
if (ret)
return ret;
overlay->flip_tail = tail;
ret = i915_wait_seqno(ring, overlay->last_flip_req);
if (ret)
return ret;
i915_gem_retire_requests(dev);
overlay->last_flip_req = 0;
return 0;
}
/* overlay needs to be disable in OCMD reg */
static int intel_overlay_on(struct intel_overlay *overlay)
{
struct drm_device *dev = overlay->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
int ret;
BUG_ON(overlay->active);
overlay->active = 1;
WARN_ON(IS_I830(dev) && !(dev_priv->quirks & QUIRK_PIPEA_FORCE));
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_ON);
intel_ring_emit(ring, overlay->flip_addr | OFC_UPDATE);
intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
return intel_overlay_do_wait_request(overlay, NULL);
}
/* overlay needs to be enabled in OCMD reg */
static int intel_overlay_continue(struct intel_overlay *overlay,
bool load_polyphase_filter)
{
struct drm_device *dev = overlay->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
u32 flip_addr = overlay->flip_addr;
u32 tmp;
int ret;
BUG_ON(!overlay->active);
if (load_polyphase_filter)
flip_addr |= OFC_UPDATE;
/* check for underruns */
tmp = I915_READ(DOVSTA);
if (tmp & (1 << 17))
DRM_DEBUG("overlay underrun, DOVSTA: %x\n", tmp);
ret = intel_ring_begin(ring, 2);
if (ret)
return ret;
intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
intel_ring_emit(ring, flip_addr);
intel_ring_advance(ring);
return i915_add_request(ring, NULL, &overlay->last_flip_req);
}
static void intel_overlay_release_old_vid_tail(struct intel_overlay *overlay)
{
struct drm_i915_gem_object *obj = overlay->old_vid_bo;
i915_gem_object_unpin(obj);
drm_gem_object_unreference(&obj->base);
overlay->old_vid_bo = NULL;
}
static void intel_overlay_off_tail(struct intel_overlay *overlay)
{
struct drm_i915_gem_object *obj = overlay->vid_bo;
/* never have the overlay hw on without showing a frame */
BUG_ON(!overlay->vid_bo);
i915_gem_object_unpin(obj);
drm_gem_object_unreference(&obj->base);
overlay->vid_bo = NULL;
overlay->crtc->overlay = NULL;
overlay->crtc = NULL;
overlay->active = 0;
}
/* overlay needs to be disabled in OCMD reg */
static int intel_overlay_off(struct intel_overlay *overlay)
{
struct drm_device *dev = overlay->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
u32 flip_addr = overlay->flip_addr;
int ret;
BUG_ON(!overlay->active);
/* According to intel docs the overlay hw may hang (when switching
* off) without loading the filter coeffs. It is however unclear whether
* this applies to the disabling of the overlay or to the switching off
* of the hw. Do it in both cases */
flip_addr |= OFC_UPDATE;
ret = intel_ring_begin(ring, 6);
if (ret)
return ret;
/* wait for overlay to go idle */
intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
intel_ring_emit(ring, flip_addr);
intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
/* turn overlay off */
if (IS_I830(dev)) {
/* Workaround: Don't disable the overlay fully, since otherwise
* it dies on the next OVERLAY_ON cmd. */
intel_ring_emit(ring, MI_NOOP);
intel_ring_emit(ring, MI_NOOP);
intel_ring_emit(ring, MI_NOOP);
} else {
intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
intel_ring_emit(ring, flip_addr);
intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
}
intel_ring_advance(ring);
return intel_overlay_do_wait_request(overlay, intel_overlay_off_tail);
}
/* recover from an interruption due to a signal
* We have to be careful not to repeat work forever an make forward progess. */
static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay)
{
struct drm_device *dev = overlay->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
int ret;
if (overlay->last_flip_req == 0)
return 0;
ret = i915_wait_seqno(ring, overlay->last_flip_req);
if (ret)
return ret;
i915_gem_retire_requests(dev);
if (overlay->flip_tail)
overlay->flip_tail(overlay);
overlay->last_flip_req = 0;
return 0;
}
/* Wait for pending overlay flip and release old frame.
* Needs to be called before the overlay register are changed
* via intel_overlay_(un)map_regs
*/
static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
{
struct drm_device *dev = overlay->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
int ret;
/* Only wait if there is actually an old frame to release to
* guarantee forward progress.
*/
if (!overlay->old_vid_bo)
return 0;
if (I915_READ(ISR) & I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT) {
/* synchronous slowpath */
ret = intel_ring_begin(ring, 2);
if (ret)
return ret;
intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
ret = intel_overlay_do_wait_request(overlay,
intel_overlay_release_old_vid_tail);
if (ret)
return ret;
}
intel_overlay_release_old_vid_tail(overlay);
return 0;
}
struct put_image_params {
int format;
short dst_x;
short dst_y;
short dst_w;
short dst_h;
short src_w;
short src_scan_h;
short src_scan_w;
short src_h;
short stride_Y;
short stride_UV;
int offset_Y;
int offset_U;
int offset_V;
};
static int packed_depth_bytes(u32 format)
{
switch (format & I915_OVERLAY_DEPTH_MASK) {
case I915_OVERLAY_YUV422:
return 4;
case I915_OVERLAY_YUV411:
/* return 6; not implemented */
default:
return -EINVAL;
}
}
static int packed_width_bytes(u32 format, short width)
{
switch (format & I915_OVERLAY_DEPTH_MASK) {
case I915_OVERLAY_YUV422:
return width << 1;
default:
return -EINVAL;
}
}
static int uv_hsubsampling(u32 format)
{
switch (format & I915_OVERLAY_DEPTH_MASK) {
case I915_OVERLAY_YUV422:
case I915_OVERLAY_YUV420:
return 2;
case I915_OVERLAY_YUV411:
case I915_OVERLAY_YUV410:
return 4;
default:
return -EINVAL;
}
}
static int uv_vsubsampling(u32 format)
{
switch (format & I915_OVERLAY_DEPTH_MASK) {
case I915_OVERLAY_YUV420:
case I915_OVERLAY_YUV410:
return 2;
case I915_OVERLAY_YUV422:
case I915_OVERLAY_YUV411:
return 1;
default:
return -EINVAL;
}
}
static u32 calc_swidthsw(struct drm_device *dev, u32 offset, u32 width)
{
u32 mask, shift, ret;
if (IS_GEN2(dev)) {
mask = 0x1f;
shift = 5;
} else {
mask = 0x3f;
shift = 6;
}
ret = ((offset + width + mask) >> shift) - (offset >> shift);
if (!IS_GEN2(dev))
ret <<= 1;
ret -= 1;
return ret << 2;
}
static const u16 y_static_hcoeffs[N_HORIZ_Y_TAPS * N_PHASES] = {
0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0,
0x3000, 0xb500, 0x19d0, 0x1880, 0xb440,
0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0,
0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380,
0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320,
0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0,
0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260,
0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200,
0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0,
0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160,
0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120,
0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0,
0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0,
0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060,
0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040,
0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020,
0xb000, 0x3000, 0x0800, 0x3000, 0xb000
};
static const u16 uv_static_hcoeffs[N_HORIZ_UV_TAPS * N_PHASES] = {
0x3000, 0x1800, 0x1800, 0xb000, 0x18d0, 0x2e60,
0xb000, 0x1990, 0x2ce0, 0xb020, 0x1a68, 0x2b40,
0xb040, 0x1b20, 0x29e0, 0xb060, 0x1bd8, 0x2880,
0xb080, 0x1c88, 0x3e60, 0xb0a0, 0x1d28, 0x3c00,
0xb0c0, 0x1db8, 0x39e0, 0xb0e0, 0x1e40, 0x37e0,
0xb100, 0x1eb8, 0x3620, 0xb100, 0x1f18, 0x34a0,
0xb100, 0x1f68, 0x3360, 0xb0e0, 0x1fa8, 0x3240,
0xb0c0, 0x1fe0, 0x3140, 0xb060, 0x1ff0, 0x30a0,
0x3000, 0x0800, 0x3000
};
static void update_polyphase_filter(struct overlay_registers __iomem *regs)
{
memcpy_toio(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
memcpy_toio(regs->UV_HCOEFS, uv_static_hcoeffs,
sizeof(uv_static_hcoeffs));
}
static bool update_scaling_factors(struct intel_overlay *overlay,
struct overlay_registers __iomem *regs,
struct put_image_params *params)
{
/* fixed point with a 12 bit shift */
u32 xscale, yscale, xscale_UV, yscale_UV;
#define FP_SHIFT 12
#define FRACT_MASK 0xfff
bool scale_changed = false;
int uv_hscale = uv_hsubsampling(params->format);
int uv_vscale = uv_vsubsampling(params->format);
if (params->dst_w > 1)
xscale = ((params->src_scan_w - 1) << FP_SHIFT)
/(params->dst_w);
else
xscale = 1 << FP_SHIFT;
if (params->dst_h > 1)
yscale = ((params->src_scan_h - 1) << FP_SHIFT)
/(params->dst_h);
else
yscale = 1 << FP_SHIFT;
/*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
xscale_UV = xscale/uv_hscale;
yscale_UV = yscale/uv_vscale;
/* make the Y scale to UV scale ratio an exact multiply */
xscale = xscale_UV * uv_hscale;
yscale = yscale_UV * uv_vscale;
/*} else {
xscale_UV = 0;
yscale_UV = 0;
}*/
if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
scale_changed = true;
overlay->old_xscale = xscale;
overlay->old_yscale = yscale;
iowrite32(((yscale & FRACT_MASK) << 20) |
((xscale >> FP_SHIFT) << 16) |
((xscale & FRACT_MASK) << 3),
&regs->YRGBSCALE);
iowrite32(((yscale_UV & FRACT_MASK) << 20) |
((xscale_UV >> FP_SHIFT) << 16) |
((xscale_UV & FRACT_MASK) << 3),
&regs->UVSCALE);
iowrite32((((yscale >> FP_SHIFT) << 16) |
((yscale_UV >> FP_SHIFT) << 0)),
&regs->UVSCALEV);
if (scale_changed)
update_polyphase_filter(regs);
return scale_changed;
}
static void update_colorkey(struct intel_overlay *overlay,
struct overlay_registers __iomem *regs)
{
u32 key = overlay->color_key;
switch (overlay->crtc->base.fb->bits_per_pixel) {
case 8:
iowrite32(0, &regs->DCLRKV);
iowrite32(CLK_RGB8I_MASK | DST_KEY_ENABLE, &regs->DCLRKM);
break;
case 16:
if (overlay->crtc->base.fb->depth == 15) {
iowrite32(RGB15_TO_COLORKEY(key), &regs->DCLRKV);
iowrite32(CLK_RGB15_MASK | DST_KEY_ENABLE,
&regs->DCLRKM);
} else {
iowrite32(RGB16_TO_COLORKEY(key), &regs->DCLRKV);
iowrite32(CLK_RGB16_MASK | DST_KEY_ENABLE,
&regs->DCLRKM);
}
break;
case 24:
case 32:
iowrite32(key, &regs->DCLRKV);
iowrite32(CLK_RGB24_MASK | DST_KEY_ENABLE, &regs->DCLRKM);
break;
}
}
static u32 overlay_cmd_reg(struct put_image_params *params)
{
u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
if (params->format & I915_OVERLAY_YUV_PLANAR) {
switch (params->format & I915_OVERLAY_DEPTH_MASK) {
case I915_OVERLAY_YUV422:
cmd |= OCMD_YUV_422_PLANAR;
break;
case I915_OVERLAY_YUV420:
cmd |= OCMD_YUV_420_PLANAR;
break;
case I915_OVERLAY_YUV411:
case I915_OVERLAY_YUV410:
cmd |= OCMD_YUV_410_PLANAR;
break;
}
} else { /* YUV packed */
switch (params->format & I915_OVERLAY_DEPTH_MASK) {
case I915_OVERLAY_YUV422:
cmd |= OCMD_YUV_422_PACKED;
break;
case I915_OVERLAY_YUV411:
cmd |= OCMD_YUV_411_PACKED;
break;
}
switch (params->format & I915_OVERLAY_SWAP_MASK) {
case I915_OVERLAY_NO_SWAP:
break;
case I915_OVERLAY_UV_SWAP:
cmd |= OCMD_UV_SWAP;
break;
case I915_OVERLAY_Y_SWAP:
cmd |= OCMD_Y_SWAP;
break;
case I915_OVERLAY_Y_AND_UV_SWAP:
cmd |= OCMD_Y_AND_UV_SWAP;
break;
}
}
return cmd;
}
static int intel_overlay_do_put_image(struct intel_overlay *overlay,
struct drm_i915_gem_object *new_bo,
struct put_image_params *params)
{
int ret, tmp_width;
struct overlay_registers __iomem *regs;
bool scale_changed = false;
struct drm_device *dev = overlay->dev;
u32 swidth, swidthsw, sheight, ostride;
BUG_ON(!mutex_is_locked(&dev->struct_mutex));
BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
BUG_ON(!overlay);
ret = intel_overlay_release_old_vid(overlay);
if (ret != 0)
return ret;
ret = i915_gem_object_pin_to_display_plane(new_bo, 0, NULL);
if (ret != 0)
return ret;
ret = i915_gem_object_put_fence(new_bo);
if (ret)
goto out_unpin;
if (!overlay->active) {
u32 oconfig;
regs = intel_overlay_map_regs(overlay);
if (!regs) {
ret = -ENOMEM;
goto out_unpin;
}
oconfig = OCONF_CC_OUT_8BIT;
if (IS_GEN4(overlay->dev))
oconfig |= OCONF_CSC_MODE_BT709;
oconfig |= overlay->crtc->pipe == 0 ?
OCONF_PIPE_A : OCONF_PIPE_B;
iowrite32(oconfig, &regs->OCONFIG);
intel_overlay_unmap_regs(overlay, regs);
ret = intel_overlay_on(overlay);
if (ret != 0)
goto out_unpin;
}
regs = intel_overlay_map_regs(overlay);
if (!regs) {
ret = -ENOMEM;
goto out_unpin;
}
iowrite32((params->dst_y << 16) | params->dst_x, &regs->DWINPOS);
iowrite32((params->dst_h << 16) | params->dst_w, &regs->DWINSZ);
if (params->format & I915_OVERLAY_YUV_PACKED)
tmp_width = packed_width_bytes(params->format, params->src_w);
else
tmp_width = params->src_w;
swidth = params->src_w;
swidthsw = calc_swidthsw(overlay->dev, params->offset_Y, tmp_width);
sheight = params->src_h;
iowrite32(new_bo->gtt_offset + params->offset_Y, &regs->OBUF_0Y);
ostride = params->stride_Y;
if (params->format & I915_OVERLAY_YUV_PLANAR) {
int uv_hscale = uv_hsubsampling(params->format);
int uv_vscale = uv_vsubsampling(params->format);
u32 tmp_U, tmp_V;
swidth |= (params->src_w/uv_hscale) << 16;
tmp_U = calc_swidthsw(overlay->dev, params->offset_U,
params->src_w/uv_hscale);
tmp_V = calc_swidthsw(overlay->dev, params->offset_V,
params->src_w/uv_hscale);
swidthsw |= max_t(u32, tmp_U, tmp_V) << 16;
sheight |= (params->src_h/uv_vscale) << 16;
iowrite32(new_bo->gtt_offset + params->offset_U, &regs->OBUF_0U);
iowrite32(new_bo->gtt_offset + params->offset_V, &regs->OBUF_0V);
ostride |= params->stride_UV << 16;
}
iowrite32(swidth, &regs->SWIDTH);
iowrite32(swidthsw, &regs->SWIDTHSW);
iowrite32(sheight, &regs->SHEIGHT);
iowrite32(ostride, &regs->OSTRIDE);
scale_changed = update_scaling_factors(overlay, regs, params);
update_colorkey(overlay, regs);
iowrite32(overlay_cmd_reg(params), &regs->OCMD);
intel_overlay_unmap_regs(overlay, regs);
ret = intel_overlay_continue(overlay, scale_changed);
if (ret)
goto out_unpin;
overlay->old_vid_bo = overlay->vid_bo;
overlay->vid_bo = new_bo;
return 0;
out_unpin:
i915_gem_object_unpin(new_bo);
return ret;
}
int intel_overlay_switch_off(struct intel_overlay *overlay)
{
struct overlay_registers __iomem *regs;
struct drm_device *dev = overlay->dev;
int ret;
BUG_ON(!mutex_is_locked(&dev->struct_mutex));
BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
ret = intel_overlay_recover_from_interrupt(overlay);
if (ret != 0)
return ret;
if (!overlay->active)
return 0;
ret = intel_overlay_release_old_vid(overlay);
if (ret != 0)
return ret;
regs = intel_overlay_map_regs(overlay);
iowrite32(0, &regs->OCMD);
intel_overlay_unmap_regs(overlay, regs);
ret = intel_overlay_off(overlay);
if (ret != 0)
return ret;
intel_overlay_off_tail(overlay);
return 0;
}
static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
struct intel_crtc *crtc)
{
drm_i915_private_t *dev_priv = overlay->dev->dev_private;
if (!crtc->active)
return -EINVAL;
/* can't use the overlay with double wide pipe */
if (INTEL_INFO(overlay->dev)->gen < 4 &&
(I915_READ(PIPECONF(crtc->pipe)) & (PIPECONF_DOUBLE_WIDE | PIPECONF_ENABLE)) != PIPECONF_ENABLE)
return -EINVAL;
return 0;
}
static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
{
struct drm_device *dev = overlay->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
u32 pfit_control = I915_READ(PFIT_CONTROL);
u32 ratio;
/* XXX: This is not the same logic as in the xorg driver, but more in
* line with the intel documentation for the i965
*/
if (INTEL_INFO(dev)->gen >= 4) {
/* on i965 use the PGM reg to read out the autoscaler values */
ratio = I915_READ(PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
} else {
if (pfit_control & VERT_AUTO_SCALE)
ratio = I915_READ(PFIT_AUTO_RATIOS);
else
ratio = I915_READ(PFIT_PGM_RATIOS);
ratio >>= PFIT_VERT_SCALE_SHIFT;
}
overlay->pfit_vscale_ratio = ratio;
}
static int check_overlay_dst(struct intel_overlay *overlay,
struct drm_intel_overlay_put_image *rec)
{
struct drm_display_mode *mode = &overlay->crtc->base.mode;
if (rec->dst_x < mode->hdisplay &&
rec->dst_x + rec->dst_width <= mode->hdisplay &&
rec->dst_y < mode->vdisplay &&
rec->dst_y + rec->dst_height <= mode->vdisplay)
return 0;
else
return -EINVAL;
}
static int check_overlay_scaling(struct put_image_params *rec)
{
u32 tmp;
/* downscaling limit is 8.0 */
tmp = ((rec->src_scan_h << 16) / rec->dst_h) >> 16;
if (tmp > 7)
return -EINVAL;
tmp = ((rec->src_scan_w << 16) / rec->dst_w) >> 16;
if (tmp > 7)
return -EINVAL;
return 0;
}
static int check_overlay_src(struct drm_device *dev,
struct drm_intel_overlay_put_image *rec,
struct drm_i915_gem_object *new_bo)
{
int uv_hscale = uv_hsubsampling(rec->flags);
int uv_vscale = uv_vsubsampling(rec->flags);
u32 stride_mask;
int depth;
u32 tmp;
/* check src dimensions */
if (IS_845G(dev) || IS_I830(dev)) {
if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
rec->src_width > IMAGE_MAX_WIDTH_LEGACY)
return -EINVAL;
} else {
if (rec->src_height > IMAGE_MAX_HEIGHT ||
rec->src_width > IMAGE_MAX_WIDTH)
return -EINVAL;
}
/* better safe than sorry, use 4 as the maximal subsampling ratio */
if (rec->src_height < N_VERT_Y_TAPS*4 ||
rec->src_width < N_HORIZ_Y_TAPS*4)
return -EINVAL;
/* check alignment constraints */
switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
case I915_OVERLAY_RGB:
/* not implemented */
return -EINVAL;
case I915_OVERLAY_YUV_PACKED:
if (uv_vscale != 1)
return -EINVAL;
depth = packed_depth_bytes(rec->flags);
if (depth < 0)
return depth;
/* ignore UV planes */
rec->stride_UV = 0;
rec->offset_U = 0;
rec->offset_V = 0;
/* check pixel alignment */
if (rec->offset_Y % depth)
return -EINVAL;
break;
case I915_OVERLAY_YUV_PLANAR:
if (uv_vscale < 0 || uv_hscale < 0)
return -EINVAL;
/* no offset restrictions for planar formats */
break;
default:
return -EINVAL;
}
if (rec->src_width % uv_hscale)
return -EINVAL;
/* stride checking */
if (IS_I830(dev) || IS_845G(dev))
stride_mask = 255;
else
stride_mask = 63;
if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
return -EINVAL;
if (IS_GEN4(dev) && rec->stride_Y < 512)
return -EINVAL;
tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
4096 : 8192;
if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
return -EINVAL;
/* check buffer dimensions */
switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
case I915_OVERLAY_RGB:
case I915_OVERLAY_YUV_PACKED:
/* always 4 Y values per depth pixels */
if (packed_width_bytes(rec->flags, rec->src_width) > rec->stride_Y)
return -EINVAL;
tmp = rec->stride_Y*rec->src_height;
if (rec->offset_Y + tmp > new_bo->base.size)
return -EINVAL;
break;
case I915_OVERLAY_YUV_PLANAR:
if (rec->src_width > rec->stride_Y)
return -EINVAL;
if (rec->src_width/uv_hscale > rec->stride_UV)
return -EINVAL;
tmp = rec->stride_Y * rec->src_height;
if (rec->offset_Y + tmp > new_bo->base.size)
return -EINVAL;
tmp = rec->stride_UV * (rec->src_height / uv_vscale);
if (rec->offset_U + tmp > new_bo->base.size ||
rec->offset_V + tmp > new_bo->base.size)
return -EINVAL;
break;
}
return 0;
}
/**
* Return the pipe currently connected to the panel fitter,
* or -1 if the panel fitter is not present or not in use
*/
static int intel_panel_fitter_pipe(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pfit_control;
/* i830 doesn't have a panel fitter */
if (IS_I830(dev))
return -1;
pfit_control = I915_READ(PFIT_CONTROL);
/* See if the panel fitter is in use */
if ((pfit_control & PFIT_ENABLE) == 0)
return -1;
/* 965 can place panel fitter on either pipe */
if (IS_GEN4(dev))
return (pfit_control >> 29) & 0x3;
/* older chips can only use pipe 1 */
return 1;
}
int intel_overlay_put_image(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_intel_overlay_put_image *put_image_rec = data;
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_overlay *overlay;
struct drm_mode_object *drmmode_obj;
struct intel_crtc *crtc;
struct drm_i915_gem_object *new_bo;
struct put_image_params *params;
int ret;
/* No need to check for DRIVER_MODESET - we don't set it up then. */
overlay = dev_priv->overlay;
if (!overlay) {
DRM_DEBUG("userspace bug: no overlay\n");
return -ENODEV;
}
if (!(put_image_rec->flags & I915_OVERLAY_ENABLE)) {
mutex_lock(&dev->mode_config.mutex);
mutex_lock(&dev->struct_mutex);
ret = intel_overlay_switch_off(overlay);
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&dev->mode_config.mutex);
return ret;
}
params = kmalloc(sizeof(struct put_image_params), GFP_KERNEL);
if (!params)
return -ENOMEM;
drmmode_obj = drm_mode_object_find(dev, put_image_rec->crtc_id,
DRM_MODE_OBJECT_CRTC);
if (!drmmode_obj) {
ret = -ENOENT;
goto out_free;
}
crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
new_bo = to_intel_bo(drm_gem_object_lookup(dev, file_priv,
put_image_rec->bo_handle));
if (&new_bo->base == NULL) {
ret = -ENOENT;
goto out_free;
}
mutex_lock(&dev->mode_config.mutex);
mutex_lock(&dev->struct_mutex);
if (new_bo->tiling_mode) {
DRM_ERROR("buffer used for overlay image can not be tiled\n");
ret = -EINVAL;
goto out_unlock;
}
ret = intel_overlay_recover_from_interrupt(overlay);
if (ret != 0)
goto out_unlock;
if (overlay->crtc != crtc) {
struct drm_display_mode *mode = &crtc->base.mode;
ret = intel_overlay_switch_off(overlay);
if (ret != 0)
goto out_unlock;
ret = check_overlay_possible_on_crtc(overlay, crtc);
if (ret != 0)
goto out_unlock;
overlay->crtc = crtc;
crtc->overlay = overlay;
/* line too wide, i.e. one-line-mode */
if (mode->hdisplay > 1024 &&
intel_panel_fitter_pipe(dev) == crtc->pipe) {
overlay->pfit_active = 1;
update_pfit_vscale_ratio(overlay);
} else
overlay->pfit_active = 0;
}
ret = check_overlay_dst(overlay, put_image_rec);
if (ret != 0)
goto out_unlock;
if (overlay->pfit_active) {
params->dst_y = ((((u32)put_image_rec->dst_y) << 12) /
overlay->pfit_vscale_ratio);
/* shifting right rounds downwards, so add 1 */
params->dst_h = ((((u32)put_image_rec->dst_height) << 12) /
overlay->pfit_vscale_ratio) + 1;
} else {
params->dst_y = put_image_rec->dst_y;
params->dst_h = put_image_rec->dst_height;
}
params->dst_x = put_image_rec->dst_x;
params->dst_w = put_image_rec->dst_width;
params->src_w = put_image_rec->src_width;
params->src_h = put_image_rec->src_height;
params->src_scan_w = put_image_rec->src_scan_width;
params->src_scan_h = put_image_rec->src_scan_height;
if (params->src_scan_h > params->src_h ||
params->src_scan_w > params->src_w) {
ret = -EINVAL;
goto out_unlock;
}
ret = check_overlay_src(dev, put_image_rec, new_bo);
if (ret != 0)
goto out_unlock;
params->format = put_image_rec->flags & ~I915_OVERLAY_FLAGS_MASK;
params->stride_Y = put_image_rec->stride_Y;
params->stride_UV = put_image_rec->stride_UV;
params->offset_Y = put_image_rec->offset_Y;
params->offset_U = put_image_rec->offset_U;
params->offset_V = put_image_rec->offset_V;
/* Check scaling after src size to prevent a divide-by-zero. */
ret = check_overlay_scaling(params);
if (ret != 0)
goto out_unlock;
ret = intel_overlay_do_put_image(overlay, new_bo, params);
if (ret != 0)
goto out_unlock;
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&dev->mode_config.mutex);
kfree(params);
return 0;
out_unlock:
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&dev->mode_config.mutex);
drm_gem_object_unreference_unlocked(&new_bo->base);
out_free:
kfree(params);
return ret;
}
static void update_reg_attrs(struct intel_overlay *overlay,
struct overlay_registers __iomem *regs)
{
iowrite32((overlay->contrast << 18) | (overlay->brightness & 0xff),
&regs->OCLRC0);
iowrite32(overlay->saturation, &regs->OCLRC1);
}
static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
{
int i;
if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
return false;
for (i = 0; i < 3; i++) {
if (((gamma1 >> i*8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
return false;
}
return true;
}
static bool check_gamma5_errata(u32 gamma5)
{
int i;
for (i = 0; i < 3; i++) {
if (((gamma5 >> i*8) & 0xff) == 0x80)
return false;
}
return true;
}
static int check_gamma(struct drm_intel_overlay_attrs *attrs)
{
if (!check_gamma_bounds(0, attrs->gamma0) ||
!check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||
!check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||
!check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||
!check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||
!check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||
!check_gamma_bounds(attrs->gamma5, 0x00ffffff))
return -EINVAL;
if (!check_gamma5_errata(attrs->gamma5))
return -EINVAL;
return 0;
}
int intel_overlay_attrs(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_intel_overlay_attrs *attrs = data;
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_overlay *overlay;
struct overlay_registers __iomem *regs;
int ret;
/* No need to check for DRIVER_MODESET - we don't set it up then. */
overlay = dev_priv->overlay;
if (!overlay) {
DRM_DEBUG("userspace bug: no overlay\n");
return -ENODEV;
}
mutex_lock(&dev->mode_config.mutex);
mutex_lock(&dev->struct_mutex);
ret = -EINVAL;
if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
attrs->color_key = overlay->color_key;
attrs->brightness = overlay->brightness;
attrs->contrast = overlay->contrast;
attrs->saturation = overlay->saturation;
if (!IS_GEN2(dev)) {
attrs->gamma0 = I915_READ(OGAMC0);
attrs->gamma1 = I915_READ(OGAMC1);
attrs->gamma2 = I915_READ(OGAMC2);
attrs->gamma3 = I915_READ(OGAMC3);
attrs->gamma4 = I915_READ(OGAMC4);
attrs->gamma5 = I915_READ(OGAMC5);
}
} else {
if (attrs->brightness < -128 || attrs->brightness > 127)
goto out_unlock;
if (attrs->contrast > 255)
goto out_unlock;
if (attrs->saturation > 1023)
goto out_unlock;
overlay->color_key = attrs->color_key;
overlay->brightness = attrs->brightness;
overlay->contrast = attrs->contrast;
overlay->saturation = attrs->saturation;
regs = intel_overlay_map_regs(overlay);
if (!regs) {
ret = -ENOMEM;
goto out_unlock;
}
update_reg_attrs(overlay, regs);
intel_overlay_unmap_regs(overlay, regs);
if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
if (IS_GEN2(dev))
goto out_unlock;
if (overlay->active) {
ret = -EBUSY;
goto out_unlock;
}
ret = check_gamma(attrs);
if (ret)
goto out_unlock;
I915_WRITE(OGAMC0, attrs->gamma0);
I915_WRITE(OGAMC1, attrs->gamma1);
I915_WRITE(OGAMC2, attrs->gamma2);
I915_WRITE(OGAMC3, attrs->gamma3);
I915_WRITE(OGAMC4, attrs->gamma4);
I915_WRITE(OGAMC5, attrs->gamma5);
}
}
ret = 0;
out_unlock:
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&dev->mode_config.mutex);
return ret;
}
void intel_setup_overlay(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_overlay *overlay;
struct drm_i915_gem_object *reg_bo;
struct overlay_registers __iomem *regs;
int ret;
if (!HAS_OVERLAY(dev))
return;
overlay = kzalloc(sizeof(struct intel_overlay), GFP_KERNEL);
if (!overlay)
return;
mutex_lock(&dev->struct_mutex);
if (WARN_ON(dev_priv->overlay))
goto out_free;
overlay->dev = dev;
reg_bo = i915_gem_alloc_object(dev, PAGE_SIZE);
if (!reg_bo)
goto out_free;
overlay->reg_bo = reg_bo;
if (OVERLAY_NEEDS_PHYSICAL(dev)) {
ret = i915_gem_attach_phys_object(dev, reg_bo,
I915_GEM_PHYS_OVERLAY_REGS,
PAGE_SIZE);
if (ret) {
DRM_ERROR("failed to attach phys overlay regs\n");
goto out_free_bo;
}
overlay->flip_addr = reg_bo->phys_obj->handle->busaddr;
} else {
ret = i915_gem_object_pin(reg_bo, PAGE_SIZE, true, false);
if (ret) {
DRM_ERROR("failed to pin overlay register bo\n");
goto out_free_bo;
}
overlay->flip_addr = reg_bo->gtt_offset;
ret = i915_gem_object_set_to_gtt_domain(reg_bo, true);
if (ret) {
DRM_ERROR("failed to move overlay register bo into the GTT\n");
goto out_unpin_bo;
}
}
/* init all values */
overlay->color_key = 0x0101fe;
overlay->brightness = -19;
overlay->contrast = 75;
overlay->saturation = 146;
regs = intel_overlay_map_regs(overlay);
if (!regs)
goto out_unpin_bo;
memset_io(regs, 0, sizeof(struct overlay_registers));
update_polyphase_filter(regs);
update_reg_attrs(overlay, regs);
intel_overlay_unmap_regs(overlay, regs);
dev_priv->overlay = overlay;
mutex_unlock(&dev->struct_mutex);
DRM_INFO("initialized overlay support\n");
return;
out_unpin_bo:
if (!OVERLAY_NEEDS_PHYSICAL(dev))
i915_gem_object_unpin(reg_bo);
out_free_bo:
drm_gem_object_unreference(&reg_bo->base);
out_free:
mutex_unlock(&dev->struct_mutex);
kfree(overlay);
return;
}
void intel_cleanup_overlay(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
if (!dev_priv->overlay)
return;
/* The bo's should be free'd by the generic code already.
* Furthermore modesetting teardown happens beforehand so the
* hardware should be off already */
BUG_ON(dev_priv->overlay->active);
drm_gem_object_unreference_unlocked(&dev_priv->overlay->reg_bo->base);
kfree(dev_priv->overlay);
}
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>
struct intel_overlay_error_state {
struct overlay_registers regs;
unsigned long base;
u32 dovsta;
u32 isr;
};
static struct overlay_registers __iomem *
intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
{
drm_i915_private_t *dev_priv = overlay->dev->dev_private;
struct overlay_registers __iomem *regs;
if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
/* Cast to make sparse happy, but it's wc memory anyway, so
* equivalent to the wc io mapping on X86. */
regs = (struct overlay_registers __iomem *)
overlay->reg_bo->phys_obj->handle->vaddr;
else
regs = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
overlay->reg_bo->gtt_offset);
return regs;
}
static void intel_overlay_unmap_regs_atomic(struct intel_overlay *overlay,
struct overlay_registers __iomem *regs)
{
if (!OVERLAY_NEEDS_PHYSICAL(overlay->dev))
io_mapping_unmap_atomic(regs);
}
struct intel_overlay_error_state *
intel_overlay_capture_error_state(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_overlay *overlay = dev_priv->overlay;
struct intel_overlay_error_state *error;
struct overlay_registers __iomem *regs;
if (!overlay || !overlay->active)
return NULL;
error = kmalloc(sizeof(*error), GFP_ATOMIC);
if (error == NULL)
return NULL;
error->dovsta = I915_READ(DOVSTA);
error->isr = I915_READ(ISR);
if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
error->base = (__force long)overlay->reg_bo->phys_obj->handle->vaddr;
else
error->base = overlay->reg_bo->gtt_offset;
regs = intel_overlay_map_regs_atomic(overlay);
if (!regs)
goto err;
memcpy_fromio(&error->regs, regs, sizeof(struct overlay_registers));
intel_overlay_unmap_regs_atomic(overlay, regs);
return error;
err:
kfree(error);
return NULL;
}
void
intel_overlay_print_error_state(struct seq_file *m, struct intel_overlay_error_state *error)
{
seq_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n",
error->dovsta, error->isr);
seq_printf(m, " Register file at 0x%08lx:\n",
error->base);
#define P(x) seq_printf(m, " " #x ": 0x%08x\n", error->regs.x)
P(OBUF_0Y);
P(OBUF_1Y);
P(OBUF_0U);
P(OBUF_0V);
P(OBUF_1U);
P(OBUF_1V);
P(OSTRIDE);
P(YRGB_VPH);
P(UV_VPH);
P(HORZ_PH);
P(INIT_PHS);
P(DWINPOS);
P(DWINSZ);
P(SWIDTH);
P(SWIDTHSW);
P(SHEIGHT);
P(YRGBSCALE);
P(UVSCALE);
P(OCLRC0);
P(OCLRC1);
P(DCLRKV);
P(DCLRKM);
P(SCLRKVH);
P(SCLRKVL);
P(SCLRKEN);
P(OCONFIG);
P(OCMD);
P(OSTART_0Y);
P(OSTART_1Y);
P(OSTART_0U);
P(OSTART_0V);
P(OSTART_1U);
P(OSTART_1V);
P(OTILEOFF_0Y);
P(OTILEOFF_1Y);
P(OTILEOFF_0U);
P(OTILEOFF_0V);
P(OTILEOFF_1U);
P(OTILEOFF_1V);
P(FASTHSCALE);
P(UVSCALEV);
#undef P
}
#endif
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