[Intel-gfx] [PATCH v2 02/21] drm/i915: Parse and set stepping for platforms with GMD

Radhakrishna Sripada
2022-08-18T23:42:51Z

From: José Roberto de Souza <jose.souza@intel.com>

The GMD step field do not properly match the current stepping convention
that we use(STEP_A0, STEP_A1, STEP_B0...).

One platform could have { arch = 12, rel = 70, step = 1 } and the
actual stepping is STEP_B0 but without the translation of the step
field would mean STEP_A1.
That is why we will need to have gmd_to_intel_step tables for each IP.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
---
drivers/gpu/drm/i915/intel_step.c | 60 +++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_step.c b/drivers/gpu/drm/i915/intel_step.c
index 42b3133d8387..0fa7147c7d0f 100644
--- a/drivers/gpu/drm/i915/intel_step.c
+++ b/drivers/gpu/drm/i915/intel_step.c
@@ -135,6 +135,48 @@ static const struct intel_step_info adlp_n_revids[] = {
[0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_D0 },
};

+struct gmd_to_intel_step {
+ struct ip_version gmd;
+ enum intel_step step;
+};
+
+static const struct gmd_to_intel_step gmd_graphics_table[] = {
+ { .gmd.ver = 12, .gmd.rel = 70, .gmd.step = 0, .step = STEP_A0 },
+ { .gmd.ver = 12, .gmd.rel = 70, .gmd.step = 4, .step = STEP_B0 },
+ { .gmd.ver = 12, .gmd.rel = 71, .gmd.step = 0, .step = STEP_A0 },
+ { .gmd.ver = 12, .gmd.rel = 71, .gmd.step = 4, .step = STEP_B0 },
+ { .gmd.ver = 12, .gmd.rel = 73, .gmd.step = 0, .step = STEP_A0 },
+ { .gmd.ver = 12, .gmd.rel = 73, .gmd.step = 4, .step = STEP_B0 },
+};
+
+static const struct gmd_to_intel_step gmd_media_table[] = {
+ { .gmd.ver = 13, .gmd.rel = 70, .gmd.step = 0, .step = STEP_A0 },
+ { .gmd.ver = 13, .gmd.rel = 70, .gmd.step = 4, .step = STEP_B0 },
+};
+
+static const struct gmd_to_intel_step gmd_display_table[] = {
+ { .gmd.ver = 14, .gmd.rel = 0, .gmd.step = 0, .step = STEP_A0 },
+ { .gmd.ver = 14, .gmd.rel = 0, .gmd.step = 4, .step = STEP_B0 },
+};
+
+static u8 gmd_to_intel_step(struct drm_i915_private *i915,
+ struct ip_version *gmd,
+ const struct gmd_to_intel_step *table,
+ int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++) {
+ if (table[i].gmd.ver == gmd->ver &&
+ table[i].gmd.rel == gmd->rel &&
+ table[i].gmd.step == gmd->step)
+ return table[i].step;
+ }
+
+ drm_dbg(&i915->drm, "Using future steppings\n");
+ return STEP_FUTURE;
+}
+
static void pvc_step_init(struct drm_i915_private *i915, int pci_revid);

void intel_step_init(struct drm_i915_private *i915)
@@ -144,6 +186,24 @@ void intel_step_init(struct drm_i915_private *i915)
int revid = INTEL_REVID(i915);
struct intel_step_info step = {};

+ if (HAS_GMD_ID(i915)) {
+ step.graphics_step = gmd_to_intel_step(i915,
+ &RUNTIME_INFO(i915)->graphics,
+ gmd_graphics_table,
+ ARRAY_SIZE(gmd_graphics_table));
+ step.media_step = gmd_to_intel_step(i915,
+ &RUNTIME_INFO(i915)->media,
+ gmd_media_table,
+ ARRAY_SIZE(gmd_media_table));
+ step.display_step = gmd_to_intel_step(i915,
+ &RUNTIME_INFO(i915)->display,
+ gmd_display_table,
+ ARRAY_SIZE(gmd_display_table));
+ RUNTIME_INFO(i915)->step = step;
+
+ return;
+ }
+
if (IS_PONTEVECCHIO(i915)) {
pvc_step_init(i915, revid);
return;
--
2.25.1