[PATCH 2/3] drm/amdgpu: SI support for VCE clock control
Alex Jivin
alex.jivin at amd.com
Wed Jun 24 20:31:36 UTC 2020
Port functionality from the Radeon driver to support
VCE clock control.
Signed-off-by: Alex Jivin <alex.jivin at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 9 ++
drivers/gpu/drm/amd/amdgpu/si.c | 126 +++++++++++++++++++++++++++-
drivers/gpu/drm/amd/amdgpu/sid.h | 31 +++++++
3 files changed, 165 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 6c7dd0a707c9..4b5a9a259a21 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1083,6 +1083,15 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
tmp_ |= ((val) & ~(mask)); \
WREG32_PLL(reg, tmp_); \
} while (0)
+
+#define WREG32_SMC_P(_Reg, _Val, _Mask) \
+ do { \
+ u32 tmp = RREG32_SMC(_Reg); \
+ tmp &= (_Mask); \
+ tmp |= ((_Val) & ~(_Mask)); \
+ WREG32_SMC(_Reg, tmp); \
+ } while (0)
+
#define DREG32_SYS(sqf, adev, reg) seq_printf((sqf), #reg " : 0x%08X\n", amdgpu_device_rreg((adev), (reg), false))
#define RREG32_IO(reg) amdgpu_io_rreg(adev, (reg))
#define WREG32_IO(reg, v) amdgpu_io_wreg(adev, (reg), (v))
diff --git a/drivers/gpu/drm/amd/amdgpu/si.c b/drivers/gpu/drm/amd/amdgpu/si.c
index 93609d69eff2..a5ad48fe502e 100644
--- a/drivers/gpu/drm/amd/amdgpu/si.c
+++ b/drivers/gpu/drm/amd/amdgpu/si.c
@@ -1650,6 +1650,130 @@ static int si_set_uvd_clocks(struct amdgpu_device *adev, u32 vclk, u32 dclk)
return 0;
}
+static int si_vce_send_vcepll_ctlreq(struct amdgpu_device *adev)
+{
+ unsigned i;
+
+ /* Make sure VCEPLL_CTLREQ is deasserted */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, 0, ~UPLL_CTLREQ_MASK);
+
+ mdelay(10);
+
+ /* Assert UPLL_CTLREQ */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, UPLL_CTLREQ_MASK, ~UPLL_CTLREQ_MASK);
+
+ /* Wait for CTLACK and CTLACK2 to get asserted */
+ for (i = 0; i < SI_MAX_CTLACKS_ASSERTION_WAIT; ++i) {
+ uint32_t mask = UPLL_CTLACK_MASK | UPLL_CTLACK2_MASK;
+
+ if ((RREG32_SMC(CG_VCEPLL_FUNC_CNTL) & mask) == mask)
+ break;
+ mdelay(10);
+ }
+
+ /* Deassert UPLL_CTLREQ */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, 0, ~UPLL_CTLREQ_MASK);
+
+ if (i == SI_MAX_CTLACKS_ASSERTION_WAIT) {
+ DRM_ERROR("Timeout setting UVD clocks!\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int si_set_vce_clocks(struct amdgpu_device *adev, u32 evclk, u32 ecclk)
+{
+ unsigned fb_div = 0, evclk_div = 0, ecclk_div = 0;
+ int a;
+
+ /* Bypass evclk and ecclk with bclk */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL_2,
+ EVCLK_SRC_SEL(1) | ECCLK_SRC_SEL(1),
+ ~(EVCLK_SRC_SEL_MASK | ECCLK_SRC_SEL_MASK));
+
+ /* Put PLL in bypass mode */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, VCEPLL_BYPASS_EN_MASK,
+ ~VCEPLL_BYPASS_EN_MASK);
+
+ if (!evclk || !ecclk) {
+ /* Keep the Bypass mode, put PLL to sleep */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, VCEPLL_SLEEP_MASK,
+ ~VCEPLL_SLEEP_MASK);
+ return 0;
+ }
+
+ a = si_calc_upll_dividers(adev, evclk, ecclk, 125000, 250000,
+ 16384, 0x03FFFFFF, 0, 128, 5,
+ &fb_div, &evclk_div, &ecclk_div);
+ if (a)
+ return a;
+
+ /* Set RESET_ANTI_MUX to 0 */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL_5, 0, ~RESET_ANTI_MUX_MASK);
+
+ /* Set VCO_MODE to 1 */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, VCEPLL_VCO_MODE_MASK,
+ ~VCEPLL_VCO_MODE_MASK);
+
+ /* Toggle VCEPLL_SLEEP to 1 then back to 0 */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, VCEPLL_SLEEP_MASK,
+ ~VCEPLL_SLEEP_MASK);
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, 0, ~VCEPLL_SLEEP_MASK);
+
+ /* Deassert VCEPLL_RESET */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, 0, ~VCEPLL_RESET_MASK);
+
+ mdelay(1);
+
+ a = si_vce_send_vcepll_ctlreq(adev);
+ if (a)
+ return a;
+
+ /* Assert VCEPLL_RESET again */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, VCEPLL_RESET_MASK, ~VCEPLL_RESET_MASK);
+
+ /* Disable spread spectrum. */
+ WREG32_SMC_P(CG_VCEPLL_SPREAD_SPECTRUM, 0, ~SSEN_MASK);
+
+ /* Set feedback divider */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL_3,
+ VCEPLL_FB_DIV(fb_div),
+ ~VCEPLL_FB_DIV_MASK);
+
+ /* Set ref divider to 0 */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, 0, ~VCEPLL_REF_DIV_MASK);
+
+ /* Set PDIV_A and PDIV_B */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL_2,
+ VCEPLL_PDIV_A(evclk_div) | VCEPLL_PDIV_B(ecclk_div),
+ ~(VCEPLL_PDIV_A_MASK | VCEPLL_PDIV_B_MASK));
+
+ /* Give the PLL some time to settle */
+ mdelay(15);
+
+ /* Deassert PLL_RESET */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, 0, ~VCEPLL_RESET_MASK);
+
+ mdelay(15);
+
+ /* Switch from bypass mode to normal mode */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL, 0, ~VCEPLL_BYPASS_EN_MASK);
+
+ a = si_vce_send_vcepll_ctlreq(adev);
+ if (a)
+ return a;
+
+ /* Switch VCLK and DCLK selection */
+ WREG32_SMC_P(CG_VCEPLL_FUNC_CNTL_2,
+ EVCLK_SRC_SEL(16) | ECCLK_SRC_SEL(16),
+ ~(EVCLK_SRC_SEL_MASK | ECCLK_SRC_SEL_MASK));
+
+ mdelay(100);
+
+ return 0;
+}
+
static const struct amdgpu_asic_funcs si_asic_funcs =
{
.read_disabled_bios = &si_read_disabled_bios,
@@ -1660,7 +1784,7 @@ static const struct amdgpu_asic_funcs si_asic_funcs =
.set_vga_state = &si_vga_set_state,
.get_xclk = &si_get_xclk,
.set_uvd_clocks = &si_set_uvd_clocks,
- .set_vce_clocks = NULL,
+ .set_vce_clocks = &si_set_vce_clocks,
.get_pcie_lanes = &si_get_pcie_lanes,
.set_pcie_lanes = &si_set_pcie_lanes,
.get_config_memsize = &si_get_config_memsize,
diff --git a/drivers/gpu/drm/amd/amdgpu/sid.h b/drivers/gpu/drm/amd/amdgpu/sid.h
index 262da0fc8b2e..a3a966a83981 100644
--- a/drivers/gpu/drm/amd/amdgpu/sid.h
+++ b/drivers/gpu/drm/amd/amdgpu/sid.h
@@ -2461,4 +2461,35 @@
#define MC_VM_FB_OFFSET 0x81a
+/* Discrete VCE clocks */
+#define CG_VCEPLL_FUNC_CNTL 0xc0030600
+#define VCEPLL_RESET_MASK 0x00000001
+#define VCEPLL_SLEEP_MASK 0x00000002
+#define VCEPLL_BYPASS_EN_MASK 0x00000004
+#define VCEPLL_CTLREQ_MASK 0x00000008
+#define VCEPLL_VCO_MODE_MASK 0x00000600
+#define VCEPLL_REF_DIV_MASK 0x003F0000
+#define VCEPLL_CTLACK_MASK 0x40000000
+#define VCEPLL_CTLACK2_MASK 0x80000000
+
+#define CG_VCEPLL_FUNC_CNTL_2 0xc0030601
+#define VCEPLL_PDIV_A(x) ((x) << 0)
+#define VCEPLL_PDIV_A_MASK 0x0000007F
+#define VCEPLL_PDIV_B(x) ((x) << 8)
+#define VCEPLL_PDIV_B_MASK 0x00007F00
+#define EVCLK_SRC_SEL(x) ((x) << 20)
+#define EVCLK_SRC_SEL_MASK 0x01F00000
+#define ECCLK_SRC_SEL(x) ((x) << 25)
+#define ECCLK_SRC_SEL_MASK 0x3E000000
+
+#define CG_VCEPLL_FUNC_CNTL_3 0xc0030602
+#define VCEPLL_FB_DIV(x) ((x) << 0)
+#define VCEPLL_FB_DIV_MASK 0x01FFFFFF
+
+#define CG_VCEPLL_FUNC_CNTL_4 0xc0030603
+
+#define CG_VCEPLL_FUNC_CNTL_5 0xc0030604
+#define CG_VCEPLL_SPREAD_SPECTRUM 0xc0030606
+#define VCEPLL_SSEN_MASK 0x00000001
+
#endif
--
2.17.1
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