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From: Matt Roper <matthew.d.roper@intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [Intel-gfx] [PATCH 11/18] drm/i915/display13: Required bandwidth increases when VT-d is active
Date: Thu, 28 Jan 2021 11:24:06 -0800	[thread overview]
Message-ID: <20210128192413.1715802-12-matthew.d.roper@intel.com> (raw)
In-Reply-To: <20210128192413.1715802-1-matthew.d.roper@intel.com>

If VT-d is active, the memory bandwidth usage of the display is 5%
higher.  Take this into account when determining whether we can support
a display configuration.

Bspec: 64631
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bw.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index 32522ec1ffb9..14cb3fbf0039 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -398,6 +398,9 @@ static unsigned int intel_bw_data_rate(struct drm_i915_private *dev_priv,
 	for_each_pipe(dev_priv, pipe)
 		data_rate += bw_state->data_rate[pipe];
 
+	if (HAS_DISPLAY13(dev_priv) && intel_vtd_active())
+		data_rate = data_rate * 105 / 100;
+
 	return data_rate;
 }
 
-- 
2.25.4

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  parent reply	other threads:[~2021-01-28 19:25 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-28 19:23 [Intel-gfx] [PATCH 00/18] Preliminary Display13 support Matt Roper
2021-01-28 19:23 ` [Intel-gfx] [PATCH 01/18] drm/i915/display13: add Display13 characteristics Matt Roper
2021-02-11  0:03   ` Lucas De Marchi
2021-01-28 19:23 ` [Intel-gfx] [PATCH 02/18] drm/i915/display13: Handle proper AUX interrupt bits Matt Roper
2021-02-11  0:10   ` Lucas De Marchi
2021-01-28 19:23 ` [Intel-gfx] [PATCH 03/18] drm/i915/display13: Enhanced pipe underrun reporting Matt Roper
2021-02-11  0:31   ` Lucas De Marchi
2021-02-11 12:25   ` Ville Syrjälä
2021-01-28 19:23 ` [Intel-gfx] [PATCH 04/18] drm/i915/display13: Define plane capabilities Matt Roper
2021-02-11  1:05   ` Lucas De Marchi
2021-01-28 19:24 ` [Intel-gfx] [PATCH 05/18] drm/i915/display13: Support 128k plane stride Matt Roper
2021-02-11  1:17   ` Lucas De Marchi
2021-01-28 19:24 ` [Intel-gfx] [PATCH 06/18] drm/i915/display13: Only enable legacy gamma for now Matt Roper
2021-02-11  1:19   ` Lucas De Marchi
2021-01-28 19:24 ` [Intel-gfx] [PATCH 07/18] drm/i915/display13: Add Display13 power wells Matt Roper
2021-02-11  1:33   ` Lucas De Marchi
2021-01-28 19:24 ` [Intel-gfx] [PATCH 08/18] drm/i915/display13: Handle LPSP for Display 13 Matt Roper
2021-02-11  1:36   ` Lucas De Marchi
2021-01-28 19:24 ` [Intel-gfx] [PATCH 09/18] drm/i915/display13: Handle new location of outputs D and E Matt Roper
2021-01-28 19:24 ` [Intel-gfx] [PATCH 10/18] drm/i915/display13: Increase maximum watermark lines to 255 Matt Roper
2021-01-28 19:24 ` Matt Roper [this message]
2021-01-28 19:24 ` [Intel-gfx] [PATCH 12/18] drm/i915/display13: Add Wa_14011503030:d13 Matt Roper
2021-01-28 19:24 ` [Intel-gfx] [PATCH 13/18] drm/i915/display/dsc: Refactor intel_dp_dsc_compute_bpp Matt Roper
2021-01-28 19:24 ` [Intel-gfx] [PATCH 14/18] drm/i915/display13: Support DP1.4 compression BPPs Matt Roper
2021-01-28 19:24 ` [Intel-gfx] [PATCH 15/18] drm/i915/display13: Get slice height before computing rc params Matt Roper
2021-01-28 19:24 ` [Intel-gfx] [PATCH 16/18] drm/i915/display13: Calculate VDSC RC parameters Matt Roper
2021-01-28 19:24 ` [Intel-gfx] [PATCH 17/18] drm/i915/display13: Add rc_qp_table for rcparams calculation Matt Roper
2021-01-29 11:12   ` Jani Nikula
2021-01-29 11:15     ` Chris Wilson
2021-01-29 12:01       ` Jani Nikula
2021-02-10 22:24         ` Lucas De Marchi
2021-01-28 19:24 ` [Intel-gfx] [PATCH 18/18] drm/i915/display13: Enabling dithering after the CC1 pipe Matt Roper
2021-02-11 12:29   ` Ville Syrjälä
2021-02-11 12:29     ` Ville Syrjälä
2021-02-19  3:22     ` Mario Kleiner
2021-02-19  3:22       ` Mario Kleiner
2021-02-19  5:44       ` Mario Kleiner
2021-02-19  5:44         ` Mario Kleiner
2021-03-01  4:57         ` Varide, Nischal
2021-03-01  4:57           ` Varide, Nischal
2021-03-01  5:43           ` Ilia Mirkin
2021-03-01  5:43             ` Ilia Mirkin
2021-01-28 19:25 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Preliminary Display13 support Patchwork

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