From 87e04f75928bb5d357ef7df4eedc1a7e2761a833 Mon Sep 17 00:00:00 2001 From: Matt Roper Date: Wed, 19 Feb 2020 13:56:55 -0800 Subject: [PATCH] drm/i915/tgl: Add Wa_22010178259:tgl MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We need to explicitly set the TLB Request Timer initial value in the BW_BUDDY registers to 0x8 rather than relying on the hardware default. v2: Apply missing REG_FIELD_PREP to ensure 0x8 is placed in the correct bits during the rmw. (Jose) Bspec: 52890 Bspec: 50044 Fixes: 3fa01d642fa7 ("drm/i915/tgl: Program BW_BUDDY registers during display init") Cc: Stanislav Lisovskiy Cc: José Roberto de Souza Signed-off-by: Matt Roper Link: https://patchwork.freedesktop.org/patch/msgid/20200219215655.2923650-1-matthew.d.roper@intel.com Reviewed-by: José Roberto de Souza --- drivers/gpu/drm/i915/display/intel_display_power.c | 8 ++++++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index 0d94fe01be7f..8ba68ec6dc24 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -5003,6 +5003,14 @@ static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv) table[i].page_mask); intel_de_write(dev_priv, BW_BUDDY2_PAGE_MASK, table[i].page_mask); + + /* Wa_22010178259:tgl */ + intel_de_rmw(dev_priv, BW_BUDDY1_CTL, + BW_BUDDY_TLB_REQ_TIMER_MASK, + REG_FIELD_PREP(BW_BUDDY_TLB_REQ_TIMER_MASK, 0x8)); + intel_de_rmw(dev_priv, BW_BUDDY2_CTL, + BW_BUDDY_TLB_REQ_TIMER_MASK, + REG_FIELD_PREP(BW_BUDDY_TLB_REQ_TIMER_MASK, 0x8)); } } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 4acb6deaf97d..f45b5e86ec63 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7767,6 +7767,7 @@ enum { #define BW_BUDDY1_CTL _MMIO(0x45140) #define BW_BUDDY2_CTL _MMIO(0x45150) #define BW_BUDDY_DISABLE REG_BIT(31) +#define BW_BUDDY_TLB_REQ_TIMER_MASK REG_GENMASK(21, 16) #define BW_BUDDY1_PAGE_MASK _MMIO(0x45144) #define BW_BUDDY2_PAGE_MASK _MMIO(0x45154)