drm/radeon: add a asic callback to get the xclk
This is required to get the reference clock used
by the gfx engine for things like timestamps. Fixes
support for GL extensions the use timestamps on
certain boards.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index dbcb075..37d81fd 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -109,6 +109,19 @@
void r600_irq_disable(struct radeon_device *rdev);
static void r600_pcie_gen2_enable(struct radeon_device *rdev);
+/**
+ * r600_get_xclk - get the xclk
+ *
+ * @rdev: radeon_device pointer
+ *
+ * Returns the reference clock used by the gfx engine
+ * (r6xx, IGPs, APUs).
+ */
+u32 r600_get_xclk(struct radeon_device *rdev)
+{
+ return rdev->clock.spll.reference_freq;
+}
+
/* get temperature in millidegrees */
int rv6xx_get_temp(struct radeon_device *rdev)
{
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 59bfbd3..e425b41 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1179,6 +1179,8 @@
bool (*gui_idle)(struct radeon_device *rdev);
/* wait for mc_idle */
int (*mc_wait_for_idle)(struct radeon_device *rdev);
+ /* get the reference clock */
+ u32 (*get_xclk)(struct radeon_device *rdev);
/* gart */
struct {
void (*tlb_flush)(struct radeon_device *rdev);
@@ -1860,6 +1862,7 @@
#define radeon_post_page_flip(rdev, crtc) (rdev)->asic->pflip.post_page_flip((rdev), (crtc))
#define radeon_wait_for_vblank(rdev, crtc) (rdev)->asic->display.wait_for_vblank((rdev), (crtc))
#define radeon_mc_wait_for_idle(rdev) (rdev)->asic->mc_wait_for_idle((rdev))
+#define radeon_get_xclk(rdev) (rdev)->asic->get_xclk((rdev))
/* Common functions */
/* AGP */
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 67f008f..e1b4a68 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -934,6 +934,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &r600_mc_wait_for_idle,
+ .get_xclk = &r600_get_xclk,
.gart = {
.tlb_flush = &r600_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
@@ -1018,6 +1019,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &r600_mc_wait_for_idle,
+ .get_xclk = &r600_get_xclk,
.gart = {
.tlb_flush = &r600_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
@@ -1102,6 +1104,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &r600_mc_wait_for_idle,
+ .get_xclk = &rv770_get_xclk,
.gart = {
.tlb_flush = &r600_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
@@ -1186,6 +1189,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
+ .get_xclk = &rv770_get_xclk,
.gart = {
.tlb_flush = &evergreen_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
@@ -1270,6 +1274,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
+ .get_xclk = &r600_get_xclk,
.gart = {
.tlb_flush = &evergreen_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
@@ -1354,6 +1359,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
+ .get_xclk = &rv770_get_xclk,
.gart = {
.tlb_flush = &evergreen_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
@@ -1438,6 +1444,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
+ .get_xclk = &rv770_get_xclk,
.gart = {
.tlb_flush = &cayman_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
@@ -1565,6 +1572,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
+ .get_xclk = &r600_get_xclk,
.gart = {
.tlb_flush = &cayman_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
@@ -1692,6 +1700,7 @@
.ioctl_wait_idle = r600_ioctl_wait_idle,
.gui_idle = &r600_gui_idle,
.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
+ .get_xclk = &si_get_xclk,
.gart = {
.tlb_flush = &si_pcie_gart_tlb_flush,
.set_page = &rs600_gart_set_page,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index f4134a8..f15758c 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -390,6 +390,7 @@
struct radeon_sa_bo *vb);
int r600_mc_wait_for_idle(struct radeon_device *rdev);
uint64_t r600_get_gpu_clock(struct radeon_device *rdev);
+u32 r600_get_xclk(struct radeon_device *rdev);
/*
* rv770,rv730,rv710,rv740
@@ -407,6 +408,7 @@
uint64_t src_offset, uint64_t dst_offset,
unsigned num_gpu_pages,
struct radeon_fence **fence);
+u32 rv770_get_xclk(struct radeon_device *rdev);
/*
* evergreen
@@ -521,5 +523,6 @@
unsigned num_gpu_pages,
struct radeon_fence **fence);
void si_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm);
+u32 si_get_xclk(struct radeon_device *rdev);
#endif
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 9c312f9..96f05cd 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -282,7 +282,10 @@
break;
case RADEON_INFO_CLOCK_CRYSTAL_FREQ:
/* return clock value in KHz */
- value = rdev->clock.spll.reference_freq * 10;
+ if (rdev->asic->get_xclk)
+ value = radeon_get_xclk(rdev) * 10;
+ else
+ value = rdev->clock.spll.reference_freq * 10;
break;
case RADEON_INFO_NUM_BACKENDS:
if (rdev->family >= CHIP_TAHITI)
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 1b2444f..d63fe1d 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -43,6 +43,31 @@
void rv770_fini(struct radeon_device *rdev);
static void rv770_pcie_gen2_enable(struct radeon_device *rdev);
+#define PCIE_BUS_CLK 10000
+#define TCLK (PCIE_BUS_CLK / 10)
+
+/**
+ * rv770_get_xclk - get the xclk
+ *
+ * @rdev: radeon_device pointer
+ *
+ * Returns the reference clock used by the gfx engine
+ * (r7xx-cayman).
+ */
+u32 rv770_get_xclk(struct radeon_device *rdev)
+{
+ u32 reference_clock = rdev->clock.spll.reference_freq;
+ u32 tmp = RREG32(CG_CLKPIN_CNTL);
+
+ if (tmp & MUX_TCLK_TO_XCLK)
+ return TCLK;
+
+ if (tmp & XTALIN_DIVIDE)
+ return reference_clock / 4;
+
+ return reference_clock;
+}
+
u32 rv770_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
{
struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
diff --git a/drivers/gpu/drm/radeon/rv770d.h b/drivers/gpu/drm/radeon/rv770d.h
index 20e29d2..c55f950 100644
--- a/drivers/gpu/drm/radeon/rv770d.h
+++ b/drivers/gpu/drm/radeon/rv770d.h
@@ -128,6 +128,10 @@
#define GUI_ACTIVE (1<<31)
#define GRBM_STATUS2 0x8014
+#define CG_CLKPIN_CNTL 0x660
+# define MUX_TCLK_TO_XCLK (1 << 8)
+# define XTALIN_DIVIDE (1 << 9)
+
#define CG_MULT_THERMAL_STATUS 0x740
#define ASIC_T(x) ((x) << 16)
#define ASIC_T_MASK 0x3FF0000
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index 719f03e..b5064fa 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -70,6 +70,33 @@
extern void evergreen_print_gpu_status_regs(struct radeon_device *rdev);
extern bool evergreen_is_display_hung(struct radeon_device *rdev);
+#define PCIE_BUS_CLK 10000
+#define TCLK (PCIE_BUS_CLK / 10)
+
+/**
+ * si_get_xclk - get the xclk
+ *
+ * @rdev: radeon_device pointer
+ *
+ * Returns the reference clock used by the gfx engine
+ * (SI).
+ */
+u32 si_get_xclk(struct radeon_device *rdev)
+{
+ u32 reference_clock = rdev->clock.spll.reference_freq;
+ u32 tmp;
+
+ tmp = RREG32(CG_CLKPIN_CNTL_2);
+ if (tmp & MUX_TCLK_TO_XCLK)
+ return TCLK;
+
+ tmp = RREG32(CG_CLKPIN_CNTL);
+ if (tmp & XTALIN_DIVIDE)
+ return reference_clock / 4;
+
+ return reference_clock;
+}
+
/* get temperature in millidegrees */
int si_get_temp(struct radeon_device *rdev)
{
diff --git a/drivers/gpu/drm/radeon/sid.h b/drivers/gpu/drm/radeon/sid.h
index 07fc455..23fc08f 100644
--- a/drivers/gpu/drm/radeon/sid.h
+++ b/drivers/gpu/drm/radeon/sid.h
@@ -58,6 +58,11 @@
#define VGA_HDP_CONTROL 0x328
#define VGA_MEMORY_DISABLE (1 << 4)
+#define CG_CLKPIN_CNTL 0x660
+# define XTALIN_DIVIDE (1 << 1)
+#define CG_CLKPIN_CNTL_2 0x664
+# define MUX_TCLK_TO_XCLK (1 << 8)
+
#define DMIF_ADDR_CONFIG 0xBD4
#define SRBM_STATUS 0xE50