Discrete cards do not have ACPI opregion. The vbt is stored in a special
flash accessible by the display controller. In order to access the vbt
in such cases, re-use the vbt, vbt_size fields in the opregion structure.
We should move away from storing the vbt in the opregion and store it,
if required in the vbt structure.
Signed-off-by: Radhakrishna Sripada <radhakrishna.srip...@intel.com>
---
drivers/gpu/drm/i915/display/intel_bios.c | 44 ++++++++++---------
drivers/gpu/drm/i915/display/intel_opregion.c | 7 ++-
2 files changed, 29 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c
b/drivers/gpu/drm/i915/display/intel_bios.c
index 736499a6e2c7..cbfbc56ff5b2 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -2930,12 +2930,11 @@ static u32 intel_spi_read(struct intel_uncore *uncore,
u32 offset)
return intel_uncore_read(uncore, PRIMARY_SPI_TRIGGER);
}
-static struct vbt_header *spi_oprom_get_vbt(struct drm_i915_private *i915)
+static struct vbt_header *spi_oprom_get_vbt(struct drm_i915_private *i915, u16
*vbt_size)
{
u32 count, data, found, store = 0;
u32 static_region, oprom_offset;
u32 oprom_size = 0x200000;
- u16 vbt_size;
u32 *vbt;
static_region = intel_uncore_read(&i915->uncore, SPI_STATIC_REGIONS);
@@ -2957,18 +2956,18 @@ static struct vbt_header *spi_oprom_get_vbt(struct
drm_i915_private *i915)
goto err_not_found;
/* Get VBT size and allocate space for the VBT */
- vbt_size = intel_spi_read(&i915->uncore,
+ *vbt_size = intel_spi_read(&i915->uncore,
found + offsetof(struct vbt_header,
vbt_size));
- vbt_size &= 0xffff;
+ *vbt_size &= 0xffff;
- vbt = kzalloc(round_up(vbt_size, 4), GFP_KERNEL);
+ vbt = kzalloc(round_up(*vbt_size, 4), GFP_KERNEL);
if (!vbt)
goto err_not_found;
- for (count = 0; count < vbt_size; count += 4)
+ for (count = 0; count < *vbt_size; count += 4)
*(vbt + store++) = intel_spi_read(&i915->uncore, found + count);
- if (!intel_bios_is_valid_vbt(vbt, vbt_size))
+ if (!intel_bios_is_valid_vbt(vbt, *vbt_size))
goto err_free_vbt;
drm_dbg_kms(&i915->drm, "Found valid VBT in SPI flash\n");
@@ -2977,16 +2976,16 @@ static struct vbt_header *spi_oprom_get_vbt(struct
drm_i915_private *i915)
err_free_vbt:
kfree(vbt);
+ *vbt_size = 0;
err_not_found:
return NULL;
}
-static struct vbt_header *oprom_get_vbt(struct drm_i915_private *i915)
+static struct vbt_header *oprom_get_vbt(struct drm_i915_private *i915, u16
*vbt_size)
{
struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
void __iomem *p = NULL, *oprom;
struct vbt_header *vbt;
- u16 vbt_size;
size_t i, size;
oprom = pci_map_rom(pdev, &size);
@@ -3011,21 +3010,21 @@ static struct vbt_header *oprom_get_vbt(struct
drm_i915_private *i915)
goto err_unmap_oprom;
}
- vbt_size = ioread16(p + offsetof(struct vbt_header, vbt_size));
- if (vbt_size > size) {
+ *vbt_size = ioread16(p + offsetof(struct vbt_header, vbt_size));
+ if (*vbt_size > size) {
drm_dbg(&i915->drm,
- "VBT incomplete (vbt_size overflows)\n");
+ "VBT incomplete (*vbt_size overflows)\n");
goto err_unmap_oprom;
}
/* The rest will be validated by intel_bios_is_valid_vbt() */
- vbt = kmalloc(vbt_size, GFP_KERNEL);
+ vbt = kmalloc(*vbt_size, GFP_KERNEL);
if (!vbt)
goto err_unmap_oprom;
- memcpy_fromio(vbt, p, vbt_size);
+ memcpy_fromio(vbt, p, *vbt_size);
- if (!intel_bios_is_valid_vbt(vbt, vbt_size))
+ if (!intel_bios_is_valid_vbt(vbt, *vbt_size))
goto err_free_vbt;
pci_unmap_rom(pdev, oprom);
@@ -3036,6 +3035,7 @@ static struct vbt_header *oprom_get_vbt(struct
drm_i915_private *i915)
err_free_vbt:
kfree(vbt);
+ *vbt_size = 0;
err_unmap_oprom:
pci_unmap_rom(pdev, oprom);
@@ -3052,8 +3052,10 @@ static struct vbt_header *oprom_get_vbt(struct
drm_i915_private *i915)
*/
void intel_bios_init(struct drm_i915_private *i915)
{
+ struct intel_opregion *opregion = &i915->display.opregion;
const struct vbt_header *vbt = i915->display.opregion.vbt;
struct vbt_header *oprom_vbt = NULL;
+ u16 vbt_size;
const struct bdb_header *bdb;
INIT_LIST_HEAD(&i915->display.vbt.display_devices);
@@ -3072,13 +3074,15 @@ void intel_bios_init(struct drm_i915_private *i915)
* PCI mapping
*/
if (!vbt && IS_DGFX(i915)) {
- oprom_vbt = spi_oprom_get_vbt(i915);
- vbt = oprom_vbt;
+ oprom_vbt = spi_oprom_get_vbt(i915, &vbt_size);
+ opregion->vbt = vbt = oprom_vbt;
+ opregion->vbt_size = (u32)vbt_size;
}
if (!vbt) {
- oprom_vbt = oprom_get_vbt(i915);
- vbt = oprom_vbt;
+ oprom_vbt = oprom_get_vbt(i915, &vbt_size);
+ opregion->vbt = vbt = oprom_vbt;
+ opregion->vbt_size = (u32)vbt_size;
}
if (!vbt)
@@ -3111,8 +3115,6 @@ void intel_bios_init(struct drm_i915_private *i915)
/* Further processing on pre-parsed or generated child device data */
parse_sdvo_device_mapping(i915);
parse_ddi_ports(i915);
-
- kfree(oprom_vbt);
}
static void intel_bios_init_panel(struct drm_i915_private *i915,
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c
b/drivers/gpu/drm/i915/display/intel_opregion.c
index 1ce785db6a5e..20b2160e9d0e 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.c
+++ b/drivers/gpu/drm/i915/display/intel_opregion.c
@@ -1244,8 +1244,13 @@ void intel_opregion_cleanup(struct drm_i915_private
*i915)
{
struct intel_opregion *opregion = &i915->display.opregion;
- if (!opregion->header)
+ if (!opregion->header) {
+ if (opregion->vbt) {
+ kfree(opregion->vbt);
+ opregion->vbt_size = 0;
+ }
return;
+ }
/* just clear all opregion memory pointers now */
memunmap(opregion->header);
--
2.34.1
