From: Mika Kuoppala Date: Tue, 15 Oct 2019 15:44:44 +0000 (+0300) Subject: drm/i915/tgl: Wa_1409420604 X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=65df78bda385a905d086a787fd186506aea87df4;p=linux.git drm/i915/tgl: Wa_1409420604 Avoid possible hang in CPSS unit. Signed-off-by: Mika Kuoppala Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20191015154449.10338-6-mika.kuoppala@linux.intel.com --- diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index bc5fdb4e47b19..7fea61b00b996 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -902,6 +902,11 @@ icl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) static void tgl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { + /* Wa_1409420604:tgl */ + if (IS_TGL_REVID(i915, TGL_REVID_A0, TGL_REVID_A0)) + wa_write_or(wal, + SUBSLICE_UNIT_LEVEL_CLKGATE2, + CPSSUNIT_CLKGATE_DIS); } static void diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 4b58861b51144..449648a28a67c 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4056,6 +4056,9 @@ enum { #define SUBSLICE_UNIT_LEVEL_CLKGATE _MMIO(0x9524) #define GWUNIT_CLKGATE_DIS (1 << 16) +#define SUBSLICE_UNIT_LEVEL_CLKGATE2 _MMIO(0x9528) +#define CPSSUNIT_CLKGATE_DIS REG_BIT(9) + #define UNSLICE_UNIT_LEVEL_CLKGATE _MMIO(0x9434) #define VFUNIT_CLKGATE_DIS (1 << 20)