Facilitate using display->platform.haswell and
display->platform.haswell_ult etc. for identifying platforms and
subplatforms.
Merge the platform and subplatform bitmaps together, and check that
there's no overlap.
v4:
- Lower case, s/is/platform/
v3:
- Fix sanity check on display->is after merging subplatform members
v2:
- Use bitmap ops
- Add some sanity checks with warnings
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
.../gpu/drm/i915/display/intel_display_core.h | 3 ++
.../drm/i915/display/intel_display_device.c | 35 +++++++++++++++++--
2 files changed, 36 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_core.h b/drivers/gpu/drm/i915/display/intel_display_core.h
index 45697af25fa9..45b7c6900adc 100644
--- a/drivers/gpu/drm/i915/display/intel_display_core.h
+++ b/drivers/gpu/drm/i915/display/intel_display_core.h
@@ -284,6 +284,9 @@ struct intel_display {
/* drm device backpointer */
struct drm_device *drm;
+ /* Platform (and subplatform, if any) identification */
+ struct intel_display_platforms platform;
+
/* Display functions */
struct {
/* Top level crtc-ish functions */
diff --git a/drivers/gpu/drm/i915/display/intel_display_device.c b/drivers/gpu/drm/i915/display/intel_display_device.c
index 0e835f714bf5..c124df204166 100644
--- a/drivers/gpu/drm/i915/display/intel_display_device.c
+++ b/drivers/gpu/drm/i915/display/intel_display_device.c
@@ -1525,6 +1525,25 @@ static enum intel_step get_pre_gmdid_step(struct intel_display *display,
return step;
}
+/* Size of the entire bitmap, not the number of platforms */
+static unsigned int display_platforms_num_bits(void)
+{
+ return sizeof(((struct intel_display_platforms *)0)->bitmap) * BITS_PER_BYTE;
+}
+
+/* Number of platform bits set */
+static unsigned int display_platforms_weight(const struct intel_display_platforms *p)
+{
+ return bitmap_weight(p->bitmap, display_platforms_num_bits());
+}
+
+/* Merge the subplatform information from src to dst */
+static void display_platforms_or(struct intel_display_platforms *dst,
+ const struct intel_display_platforms *src)
+{
+ bitmap_or(dst->bitmap, dst->bitmap, src->bitmap, display_platforms_num_bits());
+}
+
void intel_display_device_probe(struct drm_i915_private *i915)
{
struct intel_display *display = &i915->display;
@@ -1564,13 +1583,25 @@ void intel_display_device_probe(struct drm_i915_private *i915)
&DISPLAY_INFO(i915)->__runtime_defaults,
sizeof(*DISPLAY_RUNTIME_INFO(i915)));
- drm_WARN_ON(&i915->drm, !desc->platform || !desc->name);
+ drm_WARN_ON(&i915->drm, !desc->platform || !desc->name ||
+ !display_platforms_weight(&desc->platforms));
DISPLAY_RUNTIME_INFO(i915)->platform = desc->platform;
+ display->platform = desc->platforms;
+
subdesc = find_subplatform_desc(pdev, desc);
if (subdesc) {
- drm_WARN_ON(&i915->drm, !subdesc->subplatform || !subdesc->name);
+ drm_WARN_ON(&i915->drm, !subdesc->subplatform || !subdesc->name ||
+ !display_platforms_weight(&subdesc->platforms));
DISPLAY_RUNTIME_INFO(i915)->subplatform = subdesc->subplatform;
+
+ display_platforms_or(&display->platform, &subdesc->platforms);
+
+ /* Ensure platform and subplatform are distinct */
+ drm_WARN_ON(&i915->drm,
+ display_platforms_weight(&display->platform) !=
+ display_platforms_weight(&desc->platforms) +
+ display_platforms_weight(&subdesc->platforms));
}
if (ip_ver.ver || ip_ver.rel || ip_ver.step) {
--
2.39.5
