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drm/i915: Handle the DG2 max bw properly

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Update DG2 init bw info similar to other platforms even though
DG2 has constant bandwidh. This will avoid branching out DG2
specific max bw calls.

V3: Fix dg2_get_bw_info() and avoid handle special cases
    for DG2 (Ville Syrjälä)

cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>

Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220328230000.215094-1-vinod.govindapillai@intel.com
This commit is contained in:
Vinod Govindapillai
2022-03-29 02:00:00 +03:00
committed by Ville Syrjälä
parent 47e794d69c
commit bc58192a9b
1 changed files with 15 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/gpu/drm/i915/display/intel_bw.c
View File

@@ -465,20 +465,25 @@ static int tgl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel
static void dg2_get_bw_info(struct drm_i915_private *i915)
{
struct intel_bw_info *bi = &i915->max_bw[0];
unsigned int deratedbw = IS_DG2_G11(i915) ? 38000 : 50000;
int num_groups = ARRAY_SIZE(i915->max_bw);
int i;
/*
* DG2 doesn't have SAGV or QGV points, just a constant max bandwidth
* that doesn't depend on the number of planes enabled. Create a
* single dummy QGV point to reflect that. DG2-G10 platforms have a
* constant 50 GB/s bandwidth, whereas DG2-G11 platforms have 38 GB/s.
* that doesn't depend on the number of planes enabled. So fill all the
* plane group with constant bw information for uniformity with other
* platforms. DG2-G10 platforms have a constant 50 GB/s bandwidth,
* whereas DG2-G11 platforms have 38 GB/s.
*/
bi->num_planes = 1;
bi->num_qgv_points = 1;
if (IS_DG2_G11(i915))
bi->deratedbw[0] = 38000;
else
bi->deratedbw[0] = 50000;
for (i = 0; i < num_groups; i++) {
struct intel_bw_info *bi = &i915->max_bw[i];
bi->num_planes = 1;
/* Need only one dummy QGV point per group */
bi->num_qgv_points = 1;
bi->deratedbw[0] = deratedbw;
}
i915->sagv_status = I915_SAGV_NOT_CONTROLLED;
}