diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2019-03-12 22:31:49 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2021-05-14 16:01:43 +0300 |
| commit | b3acf1576b1d0f77f7d33c1f900a92a07bedbecc (patch) | |
| tree | 391922cbedeffef65bd6dc80f741843c6d17311f /tools/intel_watermark.c | |
| parent | d28aee5c5f528aa6c352c3339f20aaed4d698ffa (diff) | |
tools/intel_watermark: Parse WM_DBG to help diagnose watermark issues
WM_DBG has some useful sticky bits which tell us whether the
hardware has entered specific LP1+ and/or maxfifo modes since
those bits were last cleared. Let's dump those out.
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Diffstat (limited to 'tools/intel_watermark.c')
| -rw-r--r-- | tools/intel_watermark.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/tools/intel_watermark.c b/tools/intel_watermark.c index 14d1ae0d..bc2a4623 100644 --- a/tools/intel_watermark.c +++ b/tools/intel_watermark.c @@ -41,6 +41,11 @@ static uint32_t read_reg(uint32_t addr) return INREG(display_base + addr); } +static void write_reg(uint32_t addr, uint32_t val) +{ + OUTREG(display_base + addr, val); +} + struct gmch_wm { int wm, wm1, dl, fifo, fbc, burst; bool dl_prec, valid; @@ -249,6 +254,7 @@ static void skl_wm_dump(void) uint32_t nv12_buf_cfg[num_pipes][max_planes]; uint32_t plane_ctl[num_pipes][max_planes]; uint32_t wm_linetime[num_pipes]; + uint32_t wm_dbg; intel_register_access_init(&mmio_data, intel_get_pci_device(), 0, -1); @@ -455,6 +461,17 @@ static void skl_wm_dump(void) printf("* plane watermark enabled\n"); printf("(x) line watermark if enabled\n"); + + wm_dbg = read_reg(0x45280); + printf("WM_DBG: 0x%08x\n", wm_dbg); + printf(" LP used:"); + for (level = 1; level < num_levels; level++) { + if (wm_dbg & (1 << (23 + level))) + printf(" LP%d", level); + } + printf("\n"); + /* clear the sticky bits */ + write_reg(0x45280, wm_dbg); } static void ilk_wm_dump(void) @@ -608,6 +625,22 @@ static void ilk_wm_dump(void) } printf("FBC watermark = %s\n", endis(!REG_DECODE1(arb_ctl, 15, 1))); + + if (IS_BROADWELL(devid) || IS_HASWELL(devid)) { + uint32_t wm_dbg = read_reg(0x45280); + printf("WM_DBG: 0x%08x\n", wm_dbg); + if (wm_dbg & (1 << 31)) + printf(" Full maxfifo used\n"); + if (wm_dbg & (1 << 30)) + printf(" Sprite maxfifo used\n"); + printf(" LP used:"); + for (i = 1; i < 4; i++) { + if (wm_dbg & (1 << (23+i))) + printf(" LP%d", i); + } + /* clear the sticky bits */ + write_reg(0x45280, wm_dbg); + } } static void vlv_wm_dump(void) |