drm/i915: Update bw_buddy pagemask table

A recent bspec update removed the LPDDR4 single channel entry from the
buddy register table, but added a new four-channel entry.

Workaround 1409767108 hasn't been updated with any guidance for four
channel configurations, so we leave that alternate table unchanged for
now.

Bspec 49218
Fixes: 3fa01d642fa7 ("drm/i915/tgl: Program BW_BUDDY registers during display init")
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200612204734.3674650-1-matthew.d.roper@intel.com
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit ecb40d0826fda213ebb58d49e7d5b4752480e130)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 0c713e8..4929d89 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -5240,10 +5240,10 @@ struct buddy_page_mask {
 };
 
 static const struct buddy_page_mask tgl_buddy_page_masks[] = {
-       { .num_channels = 1, .type = INTEL_DRAM_LPDDR4, .page_mask = 0xE },
        { .num_channels = 1, .type = INTEL_DRAM_DDR4,   .page_mask = 0xF },
        { .num_channels = 2, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x1C },
        { .num_channels = 2, .type = INTEL_DRAM_DDR4,   .page_mask = 0x1F },
+       { .num_channels = 4, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x38 },
        {}
 };