* Authors: AMD
*
*/
+#include <linux/delay.h>
#include "dm_services.h"
#include "dcn20/dcn20_hubbub.h"
#include "dcn21_hubbub.h"
void dcn21_dchvm_init(struct hubbub *hubbub)
{
struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+ uint32_t riommu_active;
+ int i;
//Init DCHVM block
REG_UPDATE(DCHVM_CTRL0, HOSTVM_INIT_REQ, 1);
//Poll until RIOMMU_ACTIVE = 1
- //TODO: Figure out interval us and retry count
- REG_WAIT(DCHVM_RIOMMU_STAT0, RIOMMU_ACTIVE, 1, 5, 100);
+ for (i = 0; i < 100; i++) {
+ REG_GET(DCHVM_RIOMMU_STAT0, RIOMMU_ACTIVE, &riommu_active);
- //Reflect the power status of DCHUBBUB
- REG_UPDATE(DCHVM_RIOMMU_CTRL0, HOSTVM_POWERSTATUS, 1);
+ if (riommu_active)
+ break;
+ else
+ udelay(5);
+ }
+
+ if (riommu_active) {
+ //Reflect the power status of DCHUBBUB
+ REG_UPDATE(DCHVM_RIOMMU_CTRL0, HOSTVM_POWERSTATUS, 1);
- //Start rIOMMU prefetching
- REG_UPDATE(DCHVM_RIOMMU_CTRL0, HOSTVM_PREFETCH_REQ, 1);
+ //Start rIOMMU prefetching
+ REG_UPDATE(DCHVM_RIOMMU_CTRL0, HOSTVM_PREFETCH_REQ, 1);
- // Enable dynamic clock gating
- REG_UPDATE_4(DCHVM_CLK_CTRL,
- HVM_DISPCLK_R_GATE_DIS, 0,
- HVM_DISPCLK_G_GATE_DIS, 0,
- HVM_DCFCLK_R_GATE_DIS, 0,
- HVM_DCFCLK_G_GATE_DIS, 0);
+ // Enable dynamic clock gating
+ REG_UPDATE_4(DCHVM_CLK_CTRL,
+ HVM_DISPCLK_R_GATE_DIS, 0,
+ HVM_DISPCLK_G_GATE_DIS, 0,
+ HVM_DCFCLK_R_GATE_DIS, 0,
+ HVM_DCFCLK_G_GATE_DIS, 0);
- //Poll until HOSTVM_PREFETCH_DONE = 1
- //TODO: Figure out interval us and retry count
- REG_WAIT(DCHVM_RIOMMU_STAT0, HOSTVM_PREFETCH_DONE, 1, 5, 100);
+ //Poll until HOSTVM_PREFETCH_DONE = 1
+ REG_WAIT(DCHVM_RIOMMU_STAT0, HOSTVM_PREFETCH_DONE, 1, 5, 100);
+ }
}
int hubbub21_init_dchub(struct hubbub *hubbub,