drm/i915/xe3p_lpd: Update bandwidth parameters

Bandwidth parameters for Xe3p_LPD are the same as for Xe3_LPD. Re-use
them.

Since handling for Xe3_LPD version 30.02 is more like a special case,
let's use a "== 3002" check for it inside the ">= 30" branch instead of
adding a new branch for version 35.  That allows us to re-use the ">=
30" branch for Xe3p_LPD.

v2:
  - Do not have a special case for ecc_impacting_de_bw, since there are
    no specific instructions in Bspec for this scenario. (Matt Roper)
v3:
  - Re-use the ">= 30" branch in the if-ladder. (Matt Roper)

Bspec: 68859
Signed-off-by: Matt Atwood <matthew.s.atwood@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patch.msgid.link/20251103-xe3p_lpd-basic-enabling-v3-4-00e87b510ae7@intel.com
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index 1358af209591eca7dc5d43fbfdcaf75f5c23f27e..56fdde397bf8fcd916e597234589cf381779a548 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -802,10 +802,11 @@ void intel_bw_init_hw(struct intel_display *display)
        if (!HAS_DISPLAY(display))
                return;
 
-       if (DISPLAY_VERx100(display) >= 3002) {
-               tgl_get_bw_info(display, dram_info, &xe3lpd_3002_sa_info);
-       } else if (DISPLAY_VER(display) >= 30) {
-               tgl_get_bw_info(display, dram_info, &xe3lpd_sa_info);
+       if (DISPLAY_VER(display) >= 30) {
+               if (DISPLAY_VERx100(display) == 3002)
+                       tgl_get_bw_info(display, dram_info, &xe3lpd_3002_sa_info);
+               else
+                       tgl_get_bw_info(display, dram_info, &xe3lpd_sa_info);
        } else if (DISPLAY_VERx100(display) >= 1401 && display->platform.dgfx) {
                if (dram_info->type == INTEL_DRAM_GDDR_ECC)
                        xe2_hpd_get_bw_info(display, dram_info, &xe2_hpd_ecc_sa_info);