[PATCH v2 1/3] drm/i915: Move the code to populate ACPI device ID into intel_acpi

Rajat Jain
2019-11-04T19:41:56Z

Move the code that populates the ACPI device ID for devices, into
more appripriate intel_acpi.c. This is done in preparation for more
users of this code (in next patch).

Signed-off-by: Rajat Jain <rajatja@google.com>
Change-Id: Ifb3bd458734985c2a78ba682e6f0a2e63e0626ca
---
v2: v1 doesn't exist. Found existing code in i915 driver to assign the ACPI ID
which is what I plan to re-use.

drivers/gpu/drm/i915/display/intel_acpi.c | 87 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_acpi.h | 6 ++
drivers/gpu/drm/i915/display/intel_opregion.c | 80 +----------------
3 files changed, 97 insertions(+), 76 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c
index 3456d33feb46..748d9b3125dd 100644
--- a/drivers/gpu/drm/i915/display/intel_acpi.c
+++ b/drivers/gpu/drm/i915/display/intel_acpi.c
@@ -156,3 +156,90 @@ void intel_register_dsm_handler(void)
void intel_unregister_dsm_handler(void)
{
}
+
+/*
+ * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
+ * Attached to the Display Adapter).
+ */
+#define ACPI_DISPLAY_INDEX_SHIFT 0
+#define ACPI_DISPLAY_INDEX_MASK (0xf << 0)
+#define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4
+#define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4)
+#define ACPI_DISPLAY_TYPE_SHIFT 8
+#define ACPI_DISPLAY_TYPE_MASK (0xf << 8)
+#define ACPI_DISPLAY_TYPE_OTHER (0 << 8)
+#define ACPI_DISPLAY_TYPE_VGA (1 << 8)
+#define ACPI_DISPLAY_TYPE_TV (2 << 8)
+#define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8)
+#define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8)
+#define ACPI_VENDOR_SPECIFIC_SHIFT 12
+#define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12)
+#define ACPI_BIOS_CAN_DETECT (1 << 16)
+#define ACPI_DEPENDS_ON_VGA (1 << 17)
+#define ACPI_PIPE_ID_SHIFT 18
+#define ACPI_PIPE_ID_MASK (7 << 18)
+#define ACPI_DEVICE_ID_SCHEME (1ULL << 31)
+
+static u32 acpi_display_type(struct intel_connector *connector)
+{
+ u32 display_type;
+
+ switch (connector->base.connector_type) {
+ case DRM_MODE_CONNECTOR_VGA:
+ case DRM_MODE_CONNECTOR_DVIA:
+ display_type = ACPI_DISPLAY_TYPE_VGA;
+ break;
+ case DRM_MODE_CONNECTOR_Composite:
+ case DRM_MODE_CONNECTOR_SVIDEO:
+ case DRM_MODE_CONNECTOR_Component:
+ case DRM_MODE_CONNECTOR_9PinDIN:
+ case DRM_MODE_CONNECTOR_TV:
+ display_type = ACPI_DISPLAY_TYPE_TV;
+ break;
+ case DRM_MODE_CONNECTOR_DVII:
+ case DRM_MODE_CONNECTOR_DVID:
+ case DRM_MODE_CONNECTOR_DisplayPort:
+ case DRM_MODE_CONNECTOR_HDMIA:
+ case DRM_MODE_CONNECTOR_HDMIB:
+ display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
+ break;
+ case DRM_MODE_CONNECTOR_LVDS:
+ case DRM_MODE_CONNECTOR_eDP:
+ case DRM_MODE_CONNECTOR_DSI:
+ display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
+ break;
+ case DRM_MODE_CONNECTOR_Unknown:
+ case DRM_MODE_CONNECTOR_VIRTUAL:
+ display_type = ACPI_DISPLAY_TYPE_OTHER;
+ break;
+ default:
+ MISSING_CASE(connector->base.connector_type);
+ display_type = ACPI_DISPLAY_TYPE_OTHER;
+ break;
+ }
+
+ return display_type;
+}
+
+void intel_populate_acpi_ids_for_all_connectors(struct drm_device *drm_dev)
+{
+ struct intel_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+ u8 display_index[16] = {};
+ u32 device_id, type;
+
+ /* Populate the ACPI IDs for all connectors for a given drm_device */
+ drm_connector_list_iter_begin(drm_dev, &conn_iter);
+ for_each_intel_connector_iter(connector, &conn_iter) {
+
+ device_id = acpi_display_type(connector);
+
+ /* Use display type specific display index. */
+ type = (device_id & ACPI_DISPLAY_TYPE_MASK)
+ >> ACPI_DISPLAY_TYPE_SHIFT;
+ device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
+
+ connector->acpi_device_id = device_id;
+ }
+ drm_connector_list_iter_end(&conn_iter);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_acpi.h b/drivers/gpu/drm/i915/display/intel_acpi.h
index 1c576b3fb712..8f6d850df6fa 100644
--- a/drivers/gpu/drm/i915/display/intel_acpi.h
+++ b/drivers/gpu/drm/i915/display/intel_acpi.h
@@ -6,12 +6,18 @@
#ifndef __INTEL_ACPI_H__
#define __INTEL_ACPI_H__

+#include "intel_display_types.h"
+
#ifdef CONFIG_ACPI
void intel_register_dsm_handler(void);
void intel_unregister_dsm_handler(void);
+void intel_populate_acpi_ids_for_all_connectors(struct drm_device *drm_dev);
#else
static inline void intel_register_dsm_handler(void) { return; }
static inline void intel_unregister_dsm_handler(void) { return; }
+static inline void
+static inline void
+intel_populate_acpi_ids_for_all_connectors(struct drm_device *drm_dev) { }
#endif /* CONFIG_ACPI */

#endif /* __INTEL_ACPI_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c
index 969ade623691..f5976a6ab3c4 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.c
+++ b/drivers/gpu/drm/i915/display/intel_opregion.c
@@ -35,6 +35,7 @@
#include "display/intel_panel.h"

#include "i915_drv.h"
+#include "intel_acpi.h"
#include "intel_display_types.h"
#include "intel_opregion.h"

@@ -242,29 +243,6 @@ struct opregion_asle_ext {
#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)

-/*
- * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
- * Attached to the Display Adapter).
- */
-#define ACPI_DISPLAY_INDEX_SHIFT 0
-#define ACPI_DISPLAY_INDEX_MASK (0xf << 0)
-#define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4
-#define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4)
-#define ACPI_DISPLAY_TYPE_SHIFT 8
-#define ACPI_DISPLAY_TYPE_MASK (0xf << 8)
-#define ACPI_DISPLAY_TYPE_OTHER (0 << 8)
-#define ACPI_DISPLAY_TYPE_VGA (1 << 8)
-#define ACPI_DISPLAY_TYPE_TV (2 << 8)
-#define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8)
-#define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8)
-#define ACPI_VENDOR_SPECIFIC_SHIFT 12
-#define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12)
-#define ACPI_BIOS_CAN_DETECT (1 << 16)
-#define ACPI_DEPENDS_ON_VGA (1 << 17)
-#define ACPI_PIPE_ID_SHIFT 18
-#define ACPI_PIPE_ID_MASK (7 << 18)
-#define ACPI_DEVICE_ID_SCHEME (1 << 31)
-
#define MAX_DSLP 1500

static int swsci(struct drm_i915_private *dev_priv,
@@ -662,54 +640,12 @@ static void set_did(struct intel_opregion *opregion, int i, u32 val)
}
}

-static u32 acpi_display_type(struct intel_connector *connector)
-{
- u32 display_type;
-
- switch (connector->base.connector_type) {
- case DRM_MODE_CONNECTOR_VGA:
- case DRM_MODE_CONNECTOR_DVIA:
- display_type = ACPI_DISPLAY_TYPE_VGA;
- break;
- case DRM_MODE_CONNECTOR_Composite:
- case DRM_MODE_CONNECTOR_SVIDEO:
- case DRM_MODE_CONNECTOR_Component:
- case DRM_MODE_CONNECTOR_9PinDIN:
- case DRM_MODE_CONNECTOR_TV:
- display_type = ACPI_DISPLAY_TYPE_TV;
- break;
- case DRM_MODE_CONNECTOR_DVII:
- case DRM_MODE_CONNECTOR_DVID:
- case DRM_MODE_CONNECTOR_DisplayPort:
- case DRM_MODE_CONNECTOR_HDMIA:
- case DRM_MODE_CONNECTOR_HDMIB:
- display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
- break;
- case DRM_MODE_CONNECTOR_LVDS:
- case DRM_MODE_CONNECTOR_eDP:
- case DRM_MODE_CONNECTOR_DSI:
- display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
- break;
- case DRM_MODE_CONNECTOR_Unknown:
- case DRM_MODE_CONNECTOR_VIRTUAL:
- display_type = ACPI_DISPLAY_TYPE_OTHER;
- break;
- default:
- MISSING_CASE(connector->base.connector_type);
- display_type = ACPI_DISPLAY_TYPE_OTHER;
- break;
- }
-
- return display_type;
-}
-
static void intel_didl_outputs(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->opregion;
struct intel_connector *connector;
struct drm_connector_list_iter conn_iter;
int i = 0, max_outputs;
- int display_index[16] = {};

/*
* In theory, did2, the extended didl, gets added at opregion version
@@ -721,20 +657,12 @@ static void intel_didl_outputs(struct drm_i915_private *dev_priv)
max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
ARRAY_SIZE(opregion->acpi->did2);

+ intel_populate_acpi_ids_for_all_connectors(&dev_priv->drm);
+
drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
for_each_intel_connector_iter(connector, &conn_iter) {
- u32 device_id, type;
-
- device_id = acpi_display_type(connector);
-
- /* Use display type specific display index. */
- type = (device_id & ACPI_DISPLAY_TYPE_MASK)
- >> ACPI_DISPLAY_TYPE_SHIFT;
- device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
-
- connector->acpi_device_id = device_id;
if (i < max_outputs)
- set_did(opregion, i, device_id);
+ set_did(opregion, i, connector->acpi_device_id);
i++;
}
drm_connector_list_iter_end(&conn_iter);
--
2.24.0.rc1.363.gb1bccd3e3d-goog