Bspec has added some steps that check for DMC MMIO range before
programming them.
Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dmc.c | 42 ++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c b/drivers/gpu/drm/i915/display/intel_dmc.c
index 257cf662f9f4..dc4ff43e9467 100644
--- a/drivers/gpu/drm/i915/display/intel_dmc.c
+++ b/drivers/gpu/drm/i915/display/intel_dmc.c
@@ -103,6 +103,18 @@ MODULE_FIRMWARE(BXT_DMC_PATH);
#define DMC_V1_MAX_MMIO_COUNT 8
#define DMC_V3_MAX_MMIO_COUNT 20
#define DMC_V1_MMIO_START_RANGE 0x80000
+#define TGL_MAIN_MMIO_START 0x8F000
+#define TGL_MAIN_MMIO_END 0x8FFFF
+#define TGL_PIPEA_MMIO_START 0x92000
+#define TGL_PIPEA_MMIO_END 0x93FFF
+#define TGL_PIPEB_MMIO_START 0x96000
+#define TGL_PIPEB_MMIO_END 0x97FFF
+#define TGL_PIPEC_MMIO_START 0x9A000
+#define TGL_PIPEC_MMIO_END 0x9BFFF
+#define TGL_PIPED_MMIO_START 0x9E000
+#define TGL_PIPED_MMIO_END 0x9FFFF
+#define ADLP_PIPE_MMIO_START 0x5F000
+#define ADLP_PIPE_MMIO_END 0x5FFFF
struct intel_css_header {
/* 0x09 for DMC */
@@ -374,6 +386,30 @@ static void dmc_set_fw_offset(struct intel_dmc *dmc,
}
}
+static bool dmc_mmio_addr_sanity_check(struct intel_dmc *dmc, const u32 *mmioaddr,
+u32 mmio_count)
+{
+ struct drm_i915_private *i915 = container_of(dmc, typeof(*i915), dmc);
+ int i;
+
+ if (IS_DG2(i915) || IS_ALDERLAKE_P(i915)) {
+ for (i = 0; i < mmio_count; i++) {
+ if (!((mmioaddr[i] >= TGL_MAIN_MMIO_START && mmioaddr[i] <= TGL_MAIN_MMIO_END) ||
+ (mmioaddr[i] >= ADLP_PIPE_MMIO_START && mmioaddr[i] <= ADLP_PIPE_MMIO_END)))
+ return false;
+ }
+ } else if (IS_TIGERLAKE(i915) || IS_DG1(i915) || IS_ALDERLAKE_S(i915))
+ for (i = 0; i < mmio_count; i++) {
+ if ((!(mmioaddr[i] >= TGL_MAIN_MMIO_START && mmioaddr[i] <= TGL_MAIN_MMIO_END) ||
+ (mmioaddr[i] >= TGL_PIPEA_MMIO_START && mmioaddr[i] <= TGL_PIPEA_MMIO_END) ||
+ (mmioaddr[i] >= TGL_PIPEB_MMIO_START && mmioaddr[i] <= TGL_PIPEB_MMIO_END) ||
+ (mmioaddr[i] >= TGL_PIPEC_MMIO_START && mmioaddr[i] <= TGL_PIPEC_MMIO_END) ||
+ (mmioaddr[i] >= TGL_PIPED_MMIO_START && mmioaddr[i] <= TGL_PIPEC_MMIO_END)))
+ return false;
+ }
+ return true;
+}
+
static u32 parse_dmc_fw_header(struct intel_dmc *dmc,
const struct intel_dmc_header_base *dmc_header,
size_t rem_size, u8 dmc_id)
@@ -443,6 +479,12 @@ static u32 parse_dmc_fw_header(struct intel_dmc *dmc,
return 0;
}
+ if (dmc_header->header_ver == 3) {
+ if (!dmc_mmio_addr_sanity_check(dmc, mmioaddr, mmio_count))
+ drm_err(&i915->drm, "DMC firmware has Wrong MMIO Addresses\n");
+ return 0;
+ }
+
for (i = 0; i < mmio_count; i++) {
dmc_info->mmioaddr[i] = _MMIO(mmioaddr[i]);
dmc_info->mmiodata[i] = mmiodata[i];
--
2.25.1
