From c3cc39c539d46be73ee032d2ff1b3f8fe44d4483 Mon Sep 17 00:00:00 2001 From: Mahesh Kumar Date: Mon, 5 Feb 2018 15:21:31 -0200 Subject: [PATCH] drm/i915/icl: program mbus during pipe enable MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This patch program default values of MBus credit during pipe enable. Changes Since V1: - Add WARN_ON (Paulo) - Remove TODO comment - Program 0 during pipe disable - Rebase Changes since V2: - We don't need to do anything when disabling the pipe Changes since V3 (from Paulo): - Remove WARN() that we'll never be able to trigger (Ville). Cc: Ville Syrjälä Reviewed-by: Paulo Zanoni Reviewed-by: James Ausmus Signed-off-by: Mahesh Kumar Signed-off-by: Paulo Zanoni Link: https://patchwork.freedesktop.org/patch/msgid/20180205172131.20255-1-paulo.r.zanoni@intel.com --- drivers/gpu/drm/i915/intel_display.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 94d03e2cd498..bedb40861360 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5418,6 +5418,20 @@ static void glk_pipe_scaler_clock_gating_wa(struct drm_i915_private *dev_priv, I915_WRITE(CLKGATE_DIS_PSL(pipe), val); } +static void icl_pipe_mbus_enable(struct intel_crtc *crtc) +{ + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + uint32_t val; + + val = MBUS_DBOX_BW_CREDIT(1) | MBUS_DBOX_A_CREDIT(2); + + /* Program B credit equally to all pipes */ + val |= MBUS_DBOX_B_CREDIT(24 / INTEL_INFO(dev_priv)->num_pipes); + + I915_WRITE(PIPE_MBUS_DBOX_CTL(pipe), val); +} + static void haswell_crtc_enable(struct intel_crtc_state *pipe_config, struct drm_atomic_state *old_state) { @@ -5495,6 +5509,9 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config, if (dev_priv->display.initial_watermarks != NULL) dev_priv->display.initial_watermarks(old_intel_state, pipe_config); + if (INTEL_GEN(dev_priv) >= 11) + icl_pipe_mbus_enable(intel_crtc); + /* XXX: Do the pipe assertions at the right place for BXT DSI. */ if (!transcoder_is_dsi(cpu_transcoder)) intel_enable_pipe(pipe_config); -- 2.30.2