From: Venkata Sandeep Dhanalakota <venkata.s.dhanalak...@intel.com>
On DGFX the register range has been extended to go up to 8MB. However we
only actually use up to address 280000h, so let's increase it to 4MB.
v2 (Lucas): add bspec reference and reword commit message to explain
the 4 vs 8 MB used (requested by Matt Roper)
Bspec: 53616
Cc: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
Cc: Michael J. Ruhl <michael.j.r...@intel.com>
Signed-off-by: Venkata Sandeep Dhanalakota <venkata.s.dhanalak...@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demar...@intel.com>
Reviewed-by: Matt Roper <matthew.d.ro...@intel.com>
---
drivers/gpu/drm/i915/intel_uncore.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_uncore.c
b/drivers/gpu/drm/i915/intel_uncore.c
index 263ffcb832b7..54e201fdeba4 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1701,11 +1701,15 @@ static int uncore_mmio_setup(struct intel_uncore
*uncore)
* clobbering the GTT which we want ioremap_wc instead. Fortunately,
* the register BAR remains the same size for all the earlier
* generations up to Ironlake.
+ * For dgfx chips register range is expanded to 4MB.
*/
if (INTEL_GEN(i915) < 5)
mmio_size = 512 * 1024;
+ else if (IS_DGFX(i915))
+ mmio_size = 4 * 1024 * 1024;
else
mmio_size = 2 * 1024 * 1024;
+
uncore->regs = pci_iomap(pdev, mmio_bar, mmio_size);
if (uncore->regs == NULL) {
drm_err(&i915->drm, "failed to map registers\n");
--
2.28.0
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