[PATCH v4 3/3] drm/i915/xe3lpd: Update bandwidth parameters

[Gustavo Sousa]

Bandwidth parameters for Xe3_LPD have been updated with respect to
previous display releases. Encode them into xe3lpd_sa_info and use that
new struct.

Bspec: 68859
Reviewed-by: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
---
 drivers/gpu/drm/i915/display/intel_bw.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index 629b335a00e376cba619f84344459834b70316e4..b673911d2fe31c0ccb0f27767f174bcb715edf7e 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -405,6 +405,13 @@ static const struct intel_sa_info xe2_hpd_sa_info = {
 	/* Other values not used by simplified algorithm */
 };
 
+static const struct intel_sa_info xe3lpd_sa_info = {
+	.deburst = 32,
+	.deprogbwlimit = 65, /* GB/s */
+	.displayrtids = 256,
+	.derating = 10,
+};
+
 static int icl_get_bw_info(struct intel_display *display, const struct intel_sa_info *sa)
 {
 	struct drm_i915_private *i915 = to_i915(display->drm);
@@ -753,7 +760,9 @@ void intel_bw_init_hw(struct intel_display *display)
 	if (!HAS_DISPLAY(display))
 		return;
 
-	if (DISPLAY_VERx100(display) >= 1401 && display->platform.dgfx)
+	if (DISPLAY_VER(display) >= 30)
+		tgl_get_bw_info(display, &xe3lpd_sa_info);
+	else if (DISPLAY_VERx100(display) >= 1401 && display->platform.dgfx)
 		xe2_hpd_get_bw_info(display, &xe2_hpd_sa_info);
 	else if (DISPLAY_VER(display) >= 14)
 		tgl_get_bw_info(display, &mtl_sa_info);

-- 
2.48.1