From: Ville Syrjälä <ville.syrj...@linux.intel.com>

intel_poller can be used to poll various display registers
(IIR,scanline/pixel/flip/frame counter, live address, etc.).

It can be used to determine eg. at which scanline or pixel count certain
events occur.

Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---

Ideas for a better name are welcome!


 lib/intel_reg.h        |   22 +-
 tools/Makefile.sources |    1 +
 tools/intel_poller.c   | 1471 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1491 insertions(+), 3 deletions(-)
 create mode 100644 tools/intel_poller.c

diff --git a/lib/intel_reg.h b/lib/intel_reg.h
index 84e05e4..87a14c9 100644
--- a/lib/intel_reg.h
+++ b/lib/intel_reg.h
@@ -2248,7 +2248,11 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 #define PIPE_PIXEL_MASK                0x00ffffff
 #define PIPE_PIXEL_SHIFT       0
-
+/*
+ * g4x+ frame/flip counters
+ */
+#define PIPEAFRMCOUNT_G4X      0x70040
+#define PIPEAFLIPCOUNT_G4X     0x70044
 /*
  * Computing GMCH M and N values.
  *
@@ -2296,20 +2300,24 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define PIPEBSTAT              0x71024
 #define PIPEBFRAMEHIGH         0x71040
 #define PIPEBFRAMEPIXEL                0x71044
+#define PIPEBFRMCOUNT_G4X      0x71040
+#define PIPEBFLIPCOUNT_G4X     0x71044
 
 #define PIPEB_GMCH_DATA_M      0x71050
 #define PIPEB_GMCH_DATA_N      0x71054
 #define PIPEB_DP_LINK_M                0x71060
 #define PIPEB_DP_LINK_N                0x71064
 
+#define PIPEC_DSL              0x72000
+
 #define PIPECCONF              0x72008
 
 #define PIPECGCMAXRED          0x72010
 #define PIPECGCMAXGREEN                0x72014
 #define PIPECGCMAXBLUE         0x72018
 #define PIPECSTAT              0x72024
-#define PIPECFRAMEHIGH         0x72040
-#define PIPECFRAMEPIXEL                0x72044
+#define PIPECFRMCOUNT_G4X      0x72040
+#define PIPECFLIPCOUNT_G4X     0x72044
 
 #define PIPEC_GMCH_DATA_M      0x72050
 #define PIPEC_GMCH_DATA_N      0x72054
@@ -2370,12 +2378,15 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #define DSPASURF               0x7019C
 #define DSPATILEOFF            0x701A4
+#define DSPASURFLIVE           0x701AC
 
 #define DSPBSURF               0x7119C
 #define DSPBTILEOFF            0x711A4
+#define DSPBSURFLIVE           0x711AC
 
 #define DSPCSURF               0x7219C
 #define DSPCTILEOFF            0x721A4
+#define DSPCSURFLIVE           0x721AC
 
 #define VGACNTRL               0x71400
 # define VGA_DISP_DISABLE                      (1 << 31)
@@ -2879,6 +2890,11 @@ typedef enum {
 #define DEIIR  0x44008
 #define DEIER  0x4400c
 
+#define GEN8_DE_PIPE_ISR(pipe) (0x44400 + 0x10 * (pipe))
+#define GEN8_DE_PIPE_IMR(pipe) (0x44404 + 0x10 * (pipe))
+#define GEN8_DE_PIPE_IIR(pipe) (0x44408 + 0x10 * (pipe))
+#define GEN8_DE_PIPE_IER(pipe) (0x4440c + 0x10 * (pipe))
+
 /* GT interrupt */
 #define GT_SYNC_STATUS         (1 << 2)
 #define GT_USER_INTERRUPT      (1 << 0)
diff --git a/tools/Makefile.sources b/tools/Makefile.sources
index c2535e7..6f6ca4a 100644
--- a/tools/Makefile.sources
+++ b/tools/Makefile.sources
@@ -12,6 +12,7 @@ bin_PROGRAMS =                                \
        intel_iosf_sb_write             \
        intel_opregion_decode           \
        intel_perf_counters             \
+       intel_poller                    \
        intel_stepping                  \
        intel_reg_checker               \
        intel_reg_dumper                \
diff --git a/tools/intel_poller.c b/tools/intel_poller.c
new file mode 100644
index 0000000..ebc594a
--- /dev/null
+++ b/tools/intel_poller.c
@@ -0,0 +1,1471 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * 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.
+ *
+ */
+
+#include <assert.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <string.h>
+#include "intel_chipset.h"
+#include "intel_io.h"
+#include "igt_debugfs.h"
+#include "drmtest.h"
+
+#define min(a,b) ((a) < (b) ? (a) : (b))
+#define max(a,b) ((a) > (b) ? (a) : (b))
+
+enum test {
+       TEST_INVALID,
+       TEST_PIPESTAT,
+       TEST_IIR,
+       TEST_IIR_GEN2,
+       TEST_IIR_GEN3,
+       TEST_DEIIR,
+       TEST_FRAMECOUNT,
+       TEST_FRAMECOUNT_GEN3,
+       TEST_FRAMECOUNT_G4X,
+       TEST_FLIPCOUNT,
+       TEST_PAN,
+       TEST_FLIP,
+       TEST_SURFLIVE,
+       TEST_WRAP,
+       TEST_FIELD,
+};
+
+static uint32_t vlv_offset;
+
+static volatile bool quit;
+
+static void sighandler(int x)
+{
+       quit = true;
+}
+
+static uint16_t read_reg_16(uint32_t reg)
+{
+       return *(volatile uint16_t *)((volatile char*)mmio + vlv_offset + reg);
+}
+
+static uint32_t read_reg(uint32_t reg)
+{
+       return *(volatile uint32_t *)((volatile char*)mmio + vlv_offset + reg);
+}
+
+static void write_reg_16(uint32_t reg, uint16_t val)
+{
+       *(volatile uint16_t *)((volatile char*)mmio + vlv_offset + reg) = val;
+}
+
+static void write_reg(uint32_t reg, uint32_t val)
+{
+       *(volatile uint32_t *)((volatile char*)mmio + vlv_offset + reg) = val;
+}
+
+static int pipe_to_plane(uint32_t devid, int pipe)
+{
+       if (!IS_GEN2(devid) && !IS_GEN3(devid))
+               return pipe;
+
+       switch (pipe) {
+       case 0:
+               if ((read_reg(DSPACNTR) & DISPPLANE_SEL_PIPE_MASK) == 
DISPPLANE_SEL_PIPE_B)
+                       return 1;
+               return 0;
+       case 1:
+               if ((read_reg(DSPACNTR) & DISPPLANE_SEL_PIPE_MASK) == 
DISPPLANE_SEL_PIPE_A)
+                       return 0;
+               return 1;
+       }
+
+       assert(0);
+
+       return 0;
+}
+
+static uint32_t dspoffset_reg(uint32_t devid, int pipe)
+{
+       bool use_tileoff;
+
+       pipe = pipe_to_plane(devid, pipe);
+
+       if (IS_GEN2(devid) || IS_GEN3(devid))
+               use_tileoff = false;
+       if (IS_HASWELL(devid) || IS_BROADWELL(devid))
+               use_tileoff = true;
+       else {
+               switch (pipe) {
+               case 0:
+                       use_tileoff = read_reg(DSPACNTR) & DISPLAY_PLANE_TILED;
+                       break;
+               case 1:
+                       use_tileoff = read_reg(DSPBCNTR) & DISPLAY_PLANE_TILED;
+                       break;
+               case 2:
+                       use_tileoff = read_reg(DSPCCNTR) & DISPLAY_PLANE_TILED;
+                       break;
+               }
+       }
+
+       if (use_tileoff) {
+               switch (pipe) {
+               case 0:
+                       return DSPATILEOFF;
+               case 1:
+                       return DSPBTILEOFF;
+               case 2:
+                       return DSPCTILEOFF;
+               }
+       } else {
+               switch (pipe) {
+               case 0:
+                       return DSPABASE;
+               case 1:
+                       return DSPBBASE;
+               case 2:
+                       return DSPCBASE;
+               }
+       }
+
+       assert(0);
+
+       return 0;
+}
+
+static uint32_t dspsurf_reg(uint32_t devid, int pipe)
+{
+       pipe = pipe_to_plane(devid, pipe);
+
+       if (IS_GEN2(devid) || IS_GEN3(devid)) {
+               switch (pipe) {
+               case 0:
+                       return DSPABASE;
+               case 1:
+                       return DSPBBASE;
+               case 2:
+                       return DSPCBASE;
+               }
+       } else {
+               switch (pipe) {
+               case 0:
+                       return DSPASURF;
+               case 1:
+                       return DSPBSURF;
+               case 2:
+                       return DSPCSURF;
+               }
+       }
+
+       assert(0);
+
+       return 0;
+}
+
+static uint32_t dsl_reg(int pipe)
+{
+       switch (pipe) {
+       case 0:
+               return PIPEA_DSL;
+       case 1:
+               return PIPEB_DSL;
+       case 2:
+               return PIPEC_DSL;
+       }
+
+       assert(0);
+
+       return 0;
+}
+
+static void poll_pixel_pipestat(int pipe, int bit, uint32_t *min, uint32_t 
*max, const int count)
+{
+       uint32_t pix, pix1, pix2, iir, iir1, iir2, iir_bit, iir_mask;
+       int i = 0;
+
+       switch (pipe) {
+       case 0:
+               pix = PIPEAFRAMEPIXEL;
+               iir_bit = 1 << bit;
+               iir = PIPEASTAT;
+               break;
+       case 1:
+               pix = PIPEBFRAMEPIXEL;
+               iir_bit = 1 << bit;
+               iir = PIPEBSTAT;
+               break;
+       default:
+               return;
+       }
+
+       iir_mask = read_reg(iir) & 0x7fff0000;
+
+       write_reg(iir, iir_mask | iir_bit);
+
+       while (!quit) {
+               pix1 = read_reg(pix);
+               iir1 = read_reg(iir);
+               iir2 = read_reg(iir);
+               pix2 = read_reg(pix);
+
+               if (!(iir2 & iir_bit))
+                       continue;
+
+               if (iir1 & iir_bit) {
+                       write_reg(iir, iir_mask | iir_bit);
+                       continue;
+               }
+
+               pix1 &= PIPE_PIXEL_MASK;
+               pix2 &= PIPE_PIXEL_MASK;
+
+               min[i] = pix1;
+               max[i] = pix2;
+               if (++i >= count)
+                       break;
+       }
+}
+
+static void poll_pixel_iir_gen3(int pipe, int bit, uint32_t *min, uint32_t 
*max, const int count)
+{
+       uint32_t pix, pix1, pix2, iir1, iir2, imr_save, ier_save;
+       int i = 0;
+
+       bit = 1 << bit;
+
+       switch (pipe) {
+       case 0:
+               pix = PIPEAFRAMEPIXEL;
+               break;
+       case 1:
+               pix = PIPEBFRAMEPIXEL;
+               break;
+       default:
+               return;
+       }
+
+       imr_save = read_reg(IMR);
+       ier_save = read_reg(IER);
+
+       write_reg(IER, ier_save & ~bit);
+       write_reg(IMR, imr_save & ~bit);
+
+       write_reg(IIR, bit);
+
+       while (!quit) {
+               pix1 = read_reg(pix);
+               iir1 = read_reg(IIR);
+               iir2 = read_reg(IIR);
+               pix2 = read_reg(pix);
+
+               if (!(iir2 & bit))
+                       continue;
+
+               write_reg(IIR, bit);
+
+               if (iir1 & bit)
+                       continue;
+
+               pix1 &= PIPE_PIXEL_MASK;
+               pix2 &= PIPE_PIXEL_MASK;
+
+               min[i] = pix1;
+               max[i] = pix2;
+               if (++i >= count)
+                       break;
+       }
+
+       write_reg(IMR, imr_save);
+       write_reg(IER, ier_save);
+}
+
+static void poll_pixel_framecount_gen3(int pipe, uint32_t *min, uint32_t *max, 
const int count)
+{
+       uint32_t pix, pix1, pix2, frm1, frm2;
+       int i = 0;
+
+       switch (pipe) {
+       case 0:
+               pix = PIPEAFRAMEPIXEL;
+               break;
+       case 1:
+               pix = PIPEBFRAMEPIXEL;
+               break;
+       default:
+               return;
+       }
+
+       while (!quit) {
+               pix1 = read_reg(pix);
+               pix2 = read_reg(pix);
+
+               frm1 = pix1 >> 24;
+               frm2 = pix2 >> 24;
+
+               if (frm1 + 1 != frm2)
+                       continue;
+
+               pix1 &= PIPE_PIXEL_MASK;
+               pix2 &= PIPE_PIXEL_MASK;
+
+               min[i] = pix1;
+               max[i] = pix2;
+               if (++i >= count)
+                       break;
+       }
+}
+
+static void poll_pixel_pan(uint32_t devid, int pipe, int target_pixel, int 
target_fuzz,
+                          uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t pix, pix1 = 0, pix2 = 0;
+       uint32_t saved, surf = 0;
+       int i = 0;
+
+       switch (pipe) {
+       case 0:
+               pix = PIPEAFRAMEPIXEL;
+               break;
+       case 1:
+               pix = PIPEBFRAMEPIXEL;
+               break;
+       default:
+               return;
+       }
+
+       surf = dspoffset_reg(devid, pipe);
+
+       saved = read_reg(surf);
+
+       while (!quit) {
+               while (!quit){
+                       pix1 = read_reg(pix) & PIPE_PIXEL_MASK;
+                       if (pix1 == target_pixel)
+                               break;
+               }
+
+               write_reg(surf, saved+256);
+
+               while (!quit){
+                       pix2 = read_reg(pix) & PIPE_PIXEL_MASK;
+                       if (pix2 >= target_pixel + target_fuzz)
+                               break;
+               }
+
+               write_reg(surf, saved);
+
+               min[i] = pix1;
+               max[i] = pix2;
+               if (++i >= count)
+                       break;
+       }
+
+       write_reg(surf, saved);
+}
+
+static void poll_pixel_flip(uint32_t devid, int pipe, int target_pixel, int 
target_fuzz,
+                           uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t pix, pix1, pix2;
+       uint32_t saved, surf = 0;
+       int i = 0;
+
+       switch (pipe) {
+       case 0:
+               pix = PIPEAFRAMEPIXEL;
+       case 1:
+               pix = PIPEBFRAMEPIXEL;
+       default:
+               return;
+       }
+
+       surf = dspsurf_reg(devid, pipe);
+
+       saved = read_reg(surf);
+
+       while (!quit) {
+               while (!quit){
+                       pix1 = read_reg(pix) & PIPE_PIXEL_MASK;
+                       if (pix1 == target_pixel)
+                               break;
+               }
+
+               write_reg(surf, saved+4096);
+
+               while (!quit){
+                       pix2 = read_reg(pix) & PIPE_PIXEL_MASK;
+                       if (pix2 >= target_pixel + target_fuzz)
+                               break;
+               }
+
+               write_reg(surf, saved);
+
+               min[i] = pix1;
+               max[i] = pix2;
+               if (++i >= count)
+                       break;
+       }
+
+       write_reg(surf, saved);
+}
+
+static void poll_pixel_wrap(int pipe, uint32_t *min, uint32_t *max, const int 
count)
+{
+       uint32_t pix, pix1, pix2;
+       int i = 0;
+
+       switch (pipe) {
+       case 0:
+               pix = PIPEAFRAMEPIXEL;
+               break;
+       case 1:
+               pix = PIPEBFRAMEPIXEL;
+               break;
+       default:
+               return;
+       }
+
+       while (!quit) {
+               pix1 = read_reg(pix);
+               pix2 = read_reg(pix);
+
+               pix1 &= PIPE_PIXEL_MASK;
+               pix2 &= PIPE_PIXEL_MASK;
+
+               if (pix2 >= pix1)
+                       continue;
+
+               min[i] = pix1;
+               max[i] = pix2;
+               if (++i >= count)
+                       break;
+       }
+}
+
+static void poll_dsl_pipestat(int pipe, int bit,
+                             uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t dsl, dsl1, dsl2, iir, iir1, iir2, iir_bit, iir_mask;
+       bool field1, field2;
+       int i[2] = {};
+
+       switch (pipe) {
+       case 0:
+               iir_bit = 1 << bit;
+               iir = PIPEASTAT;
+               break;
+       case 1:
+               iir_bit = 1 << bit;
+               iir = PIPEBSTAT;
+               break;
+       default:
+               return;
+       }
+
+       dsl = dsl_reg(pipe);
+
+       iir_mask = read_reg(iir) & 0x7fff0000;
+
+       write_reg(iir, iir_mask | iir_bit);
+
+       while (!quit) {
+               dsl1 = read_reg(dsl);
+               iir1 = read_reg(iir);
+               iir2 = read_reg(iir);
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (!(iir2 & iir_bit))
+                       continue;
+
+               if (iir1 & iir_bit) {
+                       write_reg(iir, iir_mask | iir_bit);
+                       continue;
+               }
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+}
+
+static void poll_dsl_iir_gen2(int pipe, int bit,
+                             uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t dsl, dsl1, dsl2, iir1, iir2, imr_save, ier_save;
+       bool field1, field2;
+       int i[2] = {};
+
+       bit = 1 << bit;
+
+       dsl = dsl_reg(pipe);
+
+       imr_save = read_reg_16(IMR);
+       ier_save = read_reg_16(IER);
+
+       write_reg_16(IER, ier_save & ~bit);
+       write_reg_16(IMR, imr_save & ~bit);
+
+       write_reg_16(IIR, bit);
+
+       while (!quit) {
+               dsl1 = read_reg(dsl);
+               iir1 = read_reg_16(IIR);
+               iir2 = read_reg_16(IIR);
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (!(iir2 & bit))
+                       continue;
+
+               write_reg_16(IIR, bit);
+
+               if (iir1 & bit)
+                       continue;
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+
+       write_reg_16(IMR, imr_save);
+       write_reg_16(IER, ier_save);
+}
+
+static void poll_dsl_iir_gen3(int pipe, int bit,
+                             uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t dsl, dsl1, dsl2, iir1, iir2, imr_save, ier_save;
+       bool field1, field2;
+       int i[2] = {};
+
+       bit = 1 << bit;
+
+       dsl = dsl_reg(pipe);
+
+       imr_save = read_reg(IMR);
+       ier_save = read_reg(IER);
+
+       write_reg(IER, ier_save & ~bit);
+       write_reg(IMR, imr_save & ~bit);
+
+       write_reg(IIR, bit);
+
+       while (!quit) {
+               dsl1 = read_reg(dsl);
+               iir1 = read_reg(IIR);
+               iir2 = read_reg(IIR);
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (!(iir2 & bit))
+                       continue;
+
+               write_reg(IIR, bit);
+
+               if (iir1 & bit)
+                       continue;
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+
+       write_reg(IMR, imr_save);
+       write_reg(IER, ier_save);
+}
+
+static void poll_dsl_deiir(uint32_t devid, int pipe, int bit,
+                          uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t dsl, dsl1, dsl2, iir1, iir2, imr_save, ier_save;
+       bool field1, field2;
+       uint32_t iir, ier, imr;
+       int i[2] = {};
+
+       bit = 1 << bit;
+
+       dsl = dsl_reg(pipe);
+
+       if (IS_GEN8(devid)) {
+               iir = GEN8_DE_PIPE_IIR(pipe);
+               ier = GEN8_DE_PIPE_IER(pipe);
+               imr = GEN8_DE_PIPE_IMR(pipe);
+       } else {
+               iir = DEIIR;
+               ier = DEIER;
+               imr = DEIMR;
+       }
+
+       imr_save = read_reg(imr);
+       ier_save = read_reg(ier);
+
+       write_reg(ier, ier_save & ~bit);
+       write_reg(imr, imr_save & ~bit);
+
+       write_reg(iir, bit);
+
+       while (!quit) {
+               dsl1 = read_reg(dsl);
+               iir1 = read_reg(iir);
+               iir2 = read_reg(iir);
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (!(iir2 & bit))
+                       continue;
+
+               write_reg(iir, bit);
+
+               if (iir1 & bit)
+                       continue;
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+
+       write_reg(imr, imr_save);
+       write_reg(ier, ier_save);
+}
+
+static void poll_dsl_framecount_g4x(int pipe, uint32_t *min, uint32_t *max, 
const int count)
+{
+       uint32_t dsl, dsl1, dsl2, frm, frm1, frm2;
+       bool field1, field2;
+       int i[2] = {};
+
+       switch (pipe) {
+       case 0:
+               frm = PIPEAFRMCOUNT_G4X;
+               break;
+       case 1:
+               frm = PIPEBFRMCOUNT_G4X;
+               break;
+       case 2:
+               frm = PIPECFRMCOUNT_G4X;
+               break;
+       default:
+               return;
+       }
+
+       dsl = dsl_reg(pipe);
+
+       while (!quit) {
+               dsl1 = read_reg(dsl);
+               frm1 = read_reg(frm);
+               frm2 = read_reg(frm);
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (frm1 + 1 != frm2)
+                       continue;
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+}
+
+static void poll_dsl_flipcount_g4x(uint32_t devid, int pipe,
+                                  uint32_t *min, uint32_t *max, const int 
count)
+{
+       uint32_t dsl, dsl1, dsl2, flp, flp1, flp2, surf;
+       bool field1, field2;
+       int i[2] = {};
+
+       switch (pipe) {
+       case 0:
+               flp = PIPEAFLIPCOUNT_G4X;
+               break;
+       case 1:
+               flp = PIPEBFLIPCOUNT_G4X;
+               break;
+       case 2:
+               flp = PIPECFLIPCOUNT_G4X;
+               break;
+       default:
+               return;
+       }
+
+       dsl = dsl_reg(pipe);
+       surf = dspsurf_reg(devid, pipe);
+
+       while (!quit) {
+               usleep(10);
+               dsl1 = read_reg(dsl);
+               flp1 = read_reg(flp);
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       return;
+
+               write_reg(surf, read_reg(surf));
+
+               while (!quit) {
+                       dsl1 = read_reg(dsl);
+                       flp2 = read_reg(flp);
+                       dsl2 = read_reg(dsl);
+
+                       field1 = dsl1 & 0x80000000;
+                       field2 = dsl2 & 0x80000000;
+                       dsl1 &= ~0x80000000;
+                       dsl2 &= ~0x80000000;
+
+                       if (flp1 == flp2)
+                               continue;
+
+                       if (field1 != field2)
+                               printf("fields are different (%u:%u -> 
%u:%u)\n",
+                                      field1, dsl1, field2, dsl2);
+
+                       min[field1*count+i[field1]] = dsl1;
+                       max[field1*count+i[field1]] = dsl2;
+                       if (++i[field1] >= count)
+                               break;
+               }
+               if (i[field1] >= count)
+                       break;
+       }
+}
+
+static void poll_dsl_framecount_gen3(int pipe, uint32_t *min, uint32_t *max, 
const int count)
+{
+       uint32_t dsl, dsl1, dsl2, frm, frm1, frm2;
+       bool field1, field2;
+       int i[2] = {};
+
+       switch (pipe) {
+       case 0:
+               frm = PIPEAFRAMEPIXEL;
+               break;
+       case 1:
+               frm = PIPEBFRAMEPIXEL;
+               break;
+       default:
+               return;
+       }
+
+       dsl = dsl_reg(pipe);
+
+       while (!quit) {
+               dsl1 = read_reg(dsl);
+               frm1 = read_reg(frm) >> 24;
+               frm2 = read_reg(frm) >> 24;
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (frm1 + 1 != frm2)
+                       continue;
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+}
+
+static void poll_dsl_pan(uint32_t devid, int pipe, int target_scanline, int 
target_fuzz,
+                        uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t dsl, dsl1 = 0, dsl2 = 0;
+       bool field1 = false, field2 = false;
+       uint32_t saved, surf = 0;
+       int i[2] = {};
+
+       dsl = dsl_reg(pipe);
+       surf = dspoffset_reg(devid, pipe);
+
+       saved = read_reg(surf);
+
+       while (!quit) {
+               while (!quit) {
+                       dsl1 = read_reg(dsl);
+                       field1 = dsl1 & 0x80000000;
+                       dsl1 &= ~0x80000000;
+                       if (dsl1 == target_scanline)
+                               break;
+               }
+
+               write_reg(surf, saved+256);
+
+               while (!quit) {
+                       dsl2 = read_reg(dsl);
+                       field2 = dsl1 & 0x80000000;
+                       dsl2 &= ~0x80000000;
+                       if (dsl2 == target_scanline + target_fuzz)
+                               break;
+               }
+
+               write_reg(surf, saved);
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+
+       write_reg(surf, saved);
+}
+
+static void poll_dsl_flip(uint32_t devid, int pipe, int target_scanline, int 
target_fuzz,
+                         uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t dsl, dsl1 = 0, dsl2 = 0;
+       bool field1 = false, field2 = false;
+       uint32_t saved, surf = 0;
+       int i[2] = {};
+
+       dsl = dsl_reg(pipe);
+       surf = dspsurf_reg(devid, pipe);
+
+       saved = read_reg(surf);
+
+       while (!quit) {
+               while (!quit) {
+                       dsl1 = read_reg(dsl);
+                       field1 = dsl1 & 0x80000000;
+                       dsl1 &= ~0x80000000;
+                       if (dsl1 == target_scanline)
+                               break;
+               }
+
+               write_reg(surf, saved+4096);
+
+               while (!quit) {
+                       dsl2 = read_reg(dsl);
+                       field2 = dsl1 & 0x80000000;
+                       dsl2 &= ~0x80000000;
+                       if (dsl2 == target_scanline + target_fuzz)
+                               break;
+               }
+
+               write_reg(surf, saved);
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+
+       write_reg(surf, saved);
+}
+
+static void poll_dsl_surflive(uint32_t devid, int pipe,
+                             uint32_t *min, uint32_t *max, const int count)
+{
+       uint32_t dsl, dsl1 = 0, dsl2 = 0, surf, surf1, surf2, surflive, surfl1 
= 0, surfl2, saved, tmp;
+       bool field1 = false, field2 = false;
+       int i[2] = {};
+
+       switch (pipe) {
+       case 0:
+               surflive = DSPASURFLIVE;
+               break;
+       case 1:
+               surflive = DSPBSURFLIVE;
+               break;
+       case 2:
+               surflive = DSPCSURFLIVE;
+               break;
+       default:
+               return;
+       }
+
+       dsl = dsl_reg(pipe);
+       surf = dspsurf_reg(devid, pipe);
+
+       saved = read_reg(surf);
+
+       surf1 = saved & ~0xfff;
+       surf2 = surf1 + 4096;
+
+       while (!quit) {
+               write_reg(surf, surf2);
+
+               while (!quit) {
+                       dsl1 = read_reg(dsl);
+                       surfl1 = read_reg(surflive) & ~0xfff;
+                       surfl2 = read_reg(surflive) & ~0xfff;
+                       dsl2 = read_reg(dsl);
+
+                       field1 = dsl1 & 0x80000000;
+                       field2 = dsl2 & 0x80000000;
+                       dsl1 &= ~0x80000000;
+                       dsl2 &= ~0x80000000;
+
+                       if (surfl2 == surf2)
+                               break;
+               }
+
+               if (surfl1 != surf2) {
+                       if (field1 != field2)
+                               printf("fields are different (%u:%u -> 
%u:%u)\n",
+                                      field1, dsl1, field2, dsl2);
+
+                       min[field1*count+i[field1]] = dsl1;
+                       max[field1*count+i[field1]] = dsl2;
+                       if (++i[field1] >= count)
+                               break;
+               }
+
+               tmp = surf1;
+               surf1 = surf2;
+               surf2 = tmp;
+       }
+
+       write_reg(surf, saved);
+}
+
+static void poll_dsl_wrap(int pipe, uint32_t *min, uint32_t *max, const int 
count)
+{
+       uint32_t dsl, dsl1, dsl2;
+       bool field1, field2;
+       int i[2] = {};
+
+       dsl = dsl_reg(pipe);
+
+       while (!quit) {
+               dsl1 = read_reg(dsl);
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (dsl2 >= dsl1)
+                       continue;
+
+               if (field1 != field2)
+                       printf("fields are different (%u:%u -> %u:%u)\n",
+                              field1, dsl1, field2, dsl2);
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+}
+
+static void poll_dsl_field(int pipe, uint32_t *min, uint32_t *max, const int 
count)
+{
+       uint32_t dsl, dsl1, dsl2;
+       bool field1, field2;
+       int i[2] = {};
+
+       dsl = dsl_reg(pipe);
+
+       while (!quit) {
+               dsl1 = read_reg(dsl);
+               dsl2 = read_reg(dsl);
+
+               field1 = dsl1 & 0x80000000;
+               field2 = dsl2 & 0x80000000;
+               dsl1 &= ~0x80000000;
+               dsl2 &= ~0x80000000;
+
+               if (field1 == field2)
+                       continue;
+
+               min[field1*count+i[field1]] = dsl1;
+               max[field1*count+i[field1]] = dsl2;
+               if (++i[field1] >= count)
+                       break;
+       }
+}
+
+static char pipe_name(int pipe)
+{
+       return pipe + 'A';
+}
+
+static const char *test_name(enum test test, int pipe, int bit, bool 
test_pixel_count)
+{
+       static char str[32];
+       const char *type = test_pixel_count ? "pixel" : "dsl";
+
+       switch (test) {
+       case TEST_PIPESTAT:
+               snprintf(str, sizeof str, "%s / pipe %c / PIPESTAT[%d] (gmch)", 
type, pipe_name(pipe), bit);
+               return str;
+       case TEST_IIR_GEN2:
+               snprintf(str, sizeof str, "%s / pipe %c / IIR[%d] (gen2)", 
type, pipe_name(pipe), bit);
+               return str;
+       case TEST_IIR_GEN3:
+               snprintf(str, sizeof str, "%s / pipe %c / IIR[%d] (gen3+)", 
type, pipe_name(pipe), bit);
+               return str;
+       case TEST_DEIIR:
+               snprintf(str, sizeof str, "%s / pipe %c / DEIIR[%d] (pch)", 
type, pipe_name(pipe), bit);
+               return str;
+       case TEST_FRAMECOUNT_GEN3:
+               snprintf(str, sizeof str, "%s / pipe %c / Frame count 
(gen3/4)", type, pipe_name(pipe));
+               return str;
+       case TEST_FRAMECOUNT_G4X:
+               snprintf(str, sizeof str, "%s / pipe %c / Frame count (g4x+)", 
type, pipe_name(pipe));
+               return str;
+       case TEST_FLIPCOUNT:
+               snprintf(str, sizeof str, "%s / pipe %c / Flip count (g4x+)", 
type, pipe_name(pipe));
+               return str;
+       case TEST_PAN:
+               snprintf(str, sizeof str, "%s / pipe %c / Pan", type, 
pipe_name(pipe));
+               return str;
+       case TEST_FLIP:
+               snprintf(str, sizeof str, "%s / pipe %c / Flip", type, 
pipe_name(pipe));
+               return str;
+       case TEST_SURFLIVE:
+               snprintf(str, sizeof str, "%s / pipe %c / Surflive", type, 
pipe_name(pipe));
+               return str;
+       case TEST_WRAP:
+               snprintf(str, sizeof str, "%s / pipe %c / Wrap", type, 
pipe_name(pipe));
+               return str;
+       case TEST_FIELD:
+               snprintf(str, sizeof str, "%s / pipe %c / Field", type, 
pipe_name(pipe));
+               return str;
+       default:
+               return "";
+       }
+}
+
+static void usage(const char *name)
+{
+       fprintf(stderr, "Usage: %s [options]\n"
+               " -t,--test 
<pipestat|iir|framecount|flipcount|pan|flip|surflive|wrap|field>\n"
+               " -p,--pipe <pipe>\n"
+               " -b,--bit <bit>\n"
+               " -l,--line <target scanline/pixel>\n"
+               " -f,--fuzz <target fuzz>\n"
+               " -x,--pixel\n",
+               name);
+       exit(1);
+}
+
+int main(int argc, char *argv[])
+{
+       int fd, i;
+       int pipe = 0, bit = 0, target_scanline = 0, target_fuzz = 1;
+       bool test_pixelcount = false;
+       uint32_t devid;
+       uint32_t min[2*128] = {};
+       uint32_t max[2*128] = {};
+       uint32_t a, b;
+       enum test test = TEST_INVALID;
+       const int count = ARRAY_SIZE(min)/2;
+
+       for (;;) {
+               static const struct option long_options[] = {
+                       { .name = "test", .has_arg = required_argument, },
+                       { .name = "pipe", .has_arg = required_argument, },
+                       { .name = "bit", .has_arg = required_argument, },
+                       { .name = "line", .has_arg = required_argument, },
+                       { .name = "fuzz", .has_arg = required_argument, },
+                       { .name = "pixel", .has_arg = no_argument, },
+                       { },
+               };
+
+               int opt = getopt_long(argc, argv, "t:p:b:l:f:x", long_options, 
NULL);
+               if (opt == -1)
+                       break;
+
+               switch (opt) {
+               case 't':
+                       if (!strcmp(optarg, "pipestat"))
+                               test = TEST_PIPESTAT;
+                       else if (!strcmp(optarg, "iir"))
+                               test = TEST_IIR;
+                       else if (!strcmp(optarg, "framecount"))
+                               test = TEST_FRAMECOUNT;
+                       else if (!strcmp(optarg, "flipcount"))
+                               test = TEST_FLIPCOUNT;
+                       else if (!strcmp(optarg, "pan"))
+                               test = TEST_PAN;
+                       else if (!strcmp(optarg, "flip"))
+                               test = TEST_FLIP;
+                       else if (!strcmp(optarg, "surflive"))
+                               test = TEST_SURFLIVE;
+                       else if (!strcmp(optarg, "wrap"))
+                               test = TEST_WRAP;
+                       else if (!strcmp(optarg, "field"))
+                               test = TEST_FIELD;
+                       else
+                               usage(argv[0]);
+                       break;
+               case 'p':
+                       pipe = atoi(optarg);
+                       if (pipe < 0 || pipe > 2)
+                               usage(argv[0]);
+                       break;
+               case 'b':
+                       bit = atoi(optarg);
+                       if (bit < 0 || bit > 31)
+                               usage(argv[0]);
+                       break;
+               case 'l':
+                       target_scanline = atoi(optarg);
+                       if (target_scanline < 0)
+                               usage(argv[0]);
+                       break;
+               case 'f':
+                       target_fuzz = atoi(optarg);
+                       if (target_fuzz <= 0)
+                               usage(argv[0]);
+                       break;
+               case 'x':
+                       test_pixelcount = true;
+                       break;
+               }
+       }
+
+       fd = drm_open_any();
+       devid = intel_get_drm_devid(fd);
+       close(fd);
+
+       /*
+        * check if the requires registers are
+        * avilable on the current platform.
+        */
+       if (IS_GEN2(devid)) {
+               if (pipe > 1)
+                       usage(argv[0]);
+
+               if (test_pixelcount)
+                       usage(argv[0]);
+
+               switch (test) {
+               case TEST_IIR:
+                       test = TEST_IIR_GEN2;
+                       break;
+               case TEST_PIPESTAT:
+               case TEST_PAN:
+                       break;
+               case TEST_FLIP:
+                       test = TEST_PAN;
+                       break;
+               default:
+                       usage(argv[0]);
+               }
+       } else if (IS_GEN3(devid) ||
+                  (IS_GEN4(devid) && !IS_G4X(devid))) {
+               if (pipe > 1)
+                       usage(argv[0]);
+
+               switch (test) {
+               case TEST_IIR:
+                       test = TEST_IIR_GEN3;
+                       break;
+               case TEST_FRAMECOUNT:
+                       test = TEST_FRAMECOUNT_GEN3;
+                       break;
+               case TEST_PIPESTAT:
+               case TEST_PAN:
+               case TEST_WRAP:
+               case TEST_FIELD:
+                       break;
+               case TEST_FLIP:
+                       if (IS_GEN3(devid))
+                               test = TEST_PAN;
+                       break;
+               default:
+                       usage(argv[0]);
+               }
+       } else if (IS_G4X(devid) || IS_VALLEYVIEW(devid)) {
+               if (IS_VALLEYVIEW(devid))
+                       vlv_offset = 0x180000;
+
+               if (pipe > 1)
+                       usage(argv[0]);
+
+               if (test_pixelcount)
+                       usage(argv[0]);
+
+               switch (test) {
+               case TEST_IIR:
+                       test = TEST_IIR_GEN3;
+                       break;
+               case TEST_FRAMECOUNT:
+                       test = TEST_FRAMECOUNT_G4X;
+                       break;
+               case TEST_FLIPCOUNT:
+               case TEST_PIPESTAT:
+               case TEST_PAN:
+               case TEST_FLIP:
+               case TEST_SURFLIVE:
+               case TEST_WRAP:
+               case TEST_FIELD:
+                       break;
+               default:
+                       usage(argv[0]);
+               }
+       } else if (HAS_PCH_SPLIT(devid) &&
+                  (IS_GEN5(devid) || IS_GEN6(devid) || IS_GEN7(devid))) {
+               if (pipe > 1 &&
+                   (IS_GEN5(devid) || IS_GEN6(devid)))
+                       usage(argv[0]);
+
+               if (test_pixelcount)
+                       usage(argv[0]);
+
+               switch (test) {
+               case TEST_IIR:
+                       test = TEST_DEIIR;
+                       break;
+               case TEST_FRAMECOUNT:
+                       test = TEST_FRAMECOUNT_G4X;
+                       break;
+               case TEST_FLIPCOUNT:
+               case TEST_PAN:
+               case TEST_FLIP:
+               case TEST_SURFLIVE:
+               case TEST_WRAP:
+               case TEST_FIELD:
+                       break;
+               default:
+                       usage(argv[0]);
+               }
+       } else if (IS_GEN8(devid)) {
+               if (test_pixelcount)
+                       usage(argv[0]);
+
+               switch (test) {
+               case TEST_IIR:
+                       test = TEST_DEIIR;
+                       break;
+               case TEST_FRAMECOUNT:
+                       test = TEST_FRAMECOUNT_G4X;
+                       break;
+               case TEST_FLIPCOUNT:
+               case TEST_PAN:
+               case TEST_FLIP:
+               case TEST_SURFLIVE:
+               case TEST_WRAP:
+               case TEST_FIELD:
+                       break;
+               default:
+                       usage(argv[0]);
+               }
+       } else {
+               usage(argv[0]);
+       }
+
+       switch (test) {
+       case TEST_IIR:
+       case TEST_FRAMECOUNT:
+               /* should no longer have the generic tests here */
+               assert(0);
+       default:
+               break;
+       }
+
+       intel_register_access_init(intel_get_pci_device(), 0);
+
+       printf("%s?\n", test_name(test, pipe, bit, test_pixelcount));
+
+       signal(SIGHUP, sighandler);
+       signal(SIGINT, sighandler);
+       signal(SIGTERM, sighandler);
+
+       switch (test) {
+       case TEST_PIPESTAT:
+               if (test_pixelcount)
+                       poll_pixel_pipestat(pipe, bit, min, max, count);
+               else
+                       poll_dsl_pipestat(pipe, bit, min, max, count);
+               break;
+       case TEST_IIR_GEN2:
+               assert(!test_pixelcount);
+               poll_dsl_iir_gen2(pipe, bit, min, max, count);
+               break;
+       case TEST_IIR_GEN3:
+               if (test_pixelcount)
+                       poll_pixel_iir_gen3(pipe, bit, min, max, count);
+               else
+                       poll_dsl_iir_gen3(pipe, bit, min, max, count);
+               break;
+       case TEST_DEIIR:
+               assert(!test_pixelcount);
+               poll_dsl_deiir(devid, pipe, bit, min, max, count);
+               break;
+       case TEST_FRAMECOUNT_GEN3:
+               if (test_pixelcount)
+                       poll_pixel_framecount_gen3(pipe, min, max, count);
+               else
+                       poll_dsl_framecount_gen3(pipe, min, max, count);
+               break;
+       case TEST_FRAMECOUNT_G4X:
+               assert(!test_pixelcount);
+               poll_dsl_framecount_g4x(pipe, min, max, count);
+               break;
+       case TEST_FLIPCOUNT:
+               assert(!test_pixelcount);
+               poll_dsl_flipcount_g4x(devid, pipe, min, max, count);
+               break;
+       case TEST_PAN:
+               if (test_pixelcount)
+                       poll_pixel_pan(devid, pipe, target_scanline, 
target_fuzz,
+                                      min, max, count);
+               else
+                       poll_dsl_pan(devid, pipe, target_scanline, target_fuzz,
+                                    min, max, count);
+               break;
+       case TEST_FLIP:
+               if (test_pixelcount)
+                       poll_pixel_flip(devid, pipe, target_scanline, 
target_fuzz,
+                                       min, max, count);
+               else
+                       poll_dsl_flip(devid, pipe, target_scanline, target_fuzz,
+                                     min, max, count);
+               break;
+       case TEST_SURFLIVE:
+               poll_dsl_surflive(devid, pipe, min, max, count);
+               break;
+       case TEST_WRAP:
+               if (test_pixelcount)
+                       poll_pixel_wrap(pipe, min, max, count);
+               else
+                       poll_dsl_wrap(pipe, min, max, count);
+               break;
+       case TEST_FIELD:
+               poll_dsl_field(pipe, min, max, count);
+               break;
+       default:
+               assert(0);
+       }
+
+       intel_register_access_fini();
+
+       if (quit)
+               return 0;
+
+       for (i = 0; i < count; i++) {
+               if (min[0*count+i] == 0 && max[0*count+i] == 0)
+                       break;
+               printf("[%u] %4u - %4u (%4u)\n", 0, min[0*count+i], 
max[0*count+i],
+                      (min[0*count+i] + max[0*count+i] + 1) >> 1);
+       }
+       for (i = 0; i < count; i++) {
+               if (min[1*count+i] == 0 && max[1*count+i] == 0)
+                       break;
+               printf("[%u] %4u - %4u (%4u)\n", 1, min[1*count+i], 
max[1*count+i],
+                      (min[1*count+i] + max[1*count+i] + 1) >> 1);
+       }
+
+       a = 0;
+       b = 0xffffffff;
+       for (i = 0; i < count; i++) {
+               if (min[0*count+i] == 0 && max[0*count+i] == 0)
+                       break;
+               a = max(a, min[0*count+i]);
+               b = min(b, max[0*count+i]);
+       }
+
+       printf("%s: [%u] %6u - %6u\n", test_name(test, pipe, bit, 
test_pixelcount), 0, a, b);
+
+       a = 0;
+       b = 0xffffffff;
+       for (i = 0; i < count; i++) {
+               if (min[1*count+i] == 0 && max[1*count+i] == 0)
+                       break;
+               a = max(a, min[1*count+i]);
+               b = min(b, max[1*count+i]);
+       }
+
+       printf("%s: [%u] %6u - %6u\n", test_name(test, pipe, bit, 
test_pixelcount), 1, a, b);
+
+       return 0;
+}
-- 
1.8.5.5

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