[PATCH 07/10] drm/radeon: add set_uvd_clocks callback for SI
Christian König
deathsimple at vodafone.de
Tue Apr 2 16:18:36 PDT 2013
Signed-off-by: Christian König <deathsimple at vodafone.de>
---
drivers/gpu/drm/radeon/radeon_asic.c | 1 +
drivers/gpu/drm/radeon/radeon_asic.h | 1 +
drivers/gpu/drm/radeon/si.c | 167 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/radeon/sid.h | 29 ++++++
4 files changed, 198 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index a65312c..03228cb 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1887,6 +1887,7 @@ static struct radeon_asic si_asic = {
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = NULL,
+ .set_uvd_clocks = &si_set_uvd_clocks,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 54a7ef7..365c964 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -545,5 +545,6 @@ int si_copy_dma(struct radeon_device *rdev,
void si_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm);
u32 si_get_xclk(struct radeon_device *rdev);
uint64_t si_get_gpu_clock_counter(struct radeon_device *rdev);
+int si_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk);
#endif
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index cc9fe39..472d9fb 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -4666,3 +4666,170 @@ uint64_t si_get_gpu_clock_counter(struct radeon_device *rdev)
mutex_unlock(&rdev->gpu_clock_mutex);
return clock;
}
+
+static int si_uvd_calc_post_div(unsigned target_freq,
+ unsigned vco_freq,
+ unsigned *div)
+{
+ /* target larger than vco frequency ? */
+ if (vco_freq < target_freq)
+ return -1; /* forget it */
+
+ /* Fclk = Fvco / PDIV */
+ *div = vco_freq / target_freq;
+
+ /* we alway need a frequency less than or equal the target */
+ if ((vco_freq / *div) > target_freq)
+ *div += 1;
+
+ /* dividers above 5 must be even */
+ if (*div > 5 && *div % 2)
+ *div += 1;
+
+ /* out of range ? */
+ if (*div >= 128)
+ return -1; /* forget it */
+
+ return vco_freq / *div;
+}
+
+static int si_uvd_send_upll_ctlreq(struct radeon_device *rdev)
+{
+ unsigned i;
+
+ /* assert UPLL_CTLREQ */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_CTLREQ_MASK, ~UPLL_CTLREQ_MASK);
+
+ /* wait for CTLACK and CTLACK2 to get asserted */
+ for (i = 0; i < 100; ++i) {
+ uint32_t mask = UPLL_CTLACK_MASK | UPLL_CTLACK2_MASK;
+ if ((RREG32(CG_UPLL_FUNC_CNTL) & mask) == mask)
+ break;
+ mdelay(10);
+ }
+ if (i == 100)
+ return -ETIMEDOUT;
+
+ /* deassert UPLL_CTLREQ */
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_CTLREQ_MASK);
+
+ return 0;
+}
+
+int si_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk)
+{
+ /* start off with something large */
+ int optimal_diff_score = 0x7FFFFFF;
+ unsigned optimal_fb_div = 0, optimal_vclk_div = 0;
+ unsigned optimal_dclk_div = 0, optimal_vco_freq = 0;
+ unsigned vco_freq;
+ int r;
+
+ /* loop through vco from low to high */
+ for (vco_freq = 125000; vco_freq <= 250000; vco_freq += 100) {
+ unsigned fb_div = vco_freq / rdev->clock.spll.reference_freq * 16384;
+ int calc_clk, diff_score, diff_vclk, diff_dclk;
+ unsigned vclk_div, dclk_div;
+
+ /* fb div out of range ? */
+ if (fb_div > 0x03FFFFFF)
+ break; /* it can oly get worse */
+
+ /* calc vclk with current vco freq. */
+ calc_clk = si_uvd_calc_post_div(vclk, vco_freq, &vclk_div);
+ if (calc_clk == -1)
+ break; /* vco is too big, it has to stop. */
+ diff_vclk = vclk - calc_clk;
+
+ /* calc dclk with current vco freq. */
+ calc_clk = si_uvd_calc_post_div(dclk, vco_freq, &dclk_div);
+ if (calc_clk == -1)
+ break; /* vco is too big, it has to stop. */
+ diff_dclk = dclk - calc_clk;
+
+ /* determine if this vco setting is better than current optimal settings */
+ diff_score = abs(diff_vclk) + abs(diff_dclk);
+ if (diff_score < optimal_diff_score) {
+ optimal_fb_div = fb_div;
+ optimal_vclk_div = vclk_div;
+ optimal_dclk_div = dclk_div;
+ optimal_vco_freq = vco_freq;
+ optimal_diff_score = diff_score;
+ if (optimal_diff_score == 0)
+ break; /* it can't get better than this */
+ }
+ }
+
+ /* set RESET_ANTI_MUX to 0 */
+ WREG32_P(CG_UPLL_FUNC_CNTL_5, 0, ~RESET_ANTI_MUX_MASK);
+
+ /* set VCO_MODE to 1 */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_VCO_MODE_MASK, ~UPLL_VCO_MODE_MASK);
+
+ /* toggle UPLL_SLEEP to 1 then back to 0 */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_SLEEP_MASK, ~UPLL_SLEEP_MASK);
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_SLEEP_MASK);
+
+ /* deassert UPLL_RESET */
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_RESET_MASK);
+
+ mdelay(1);
+
+ /* bypass vclk and dclk with bclk */
+ WREG32_P(CG_UPLL_FUNC_CNTL_2,
+ VCLK_SRC_SEL(1) | DCLK_SRC_SEL(1),
+ ~(VCLK_SRC_SEL_MASK | DCLK_SRC_SEL_MASK));
+
+ /* put PLL in bypass mode */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_BYPASS_EN_MASK, ~UPLL_BYPASS_EN_MASK);
+
+ r = si_uvd_send_upll_ctlreq(rdev);
+ if (r)
+ return r;
+
+ /* assert UPLL_RESET again */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_RESET_MASK, ~UPLL_RESET_MASK);
+
+ /* disable spread spectrum. */
+ WREG32_P(CG_UPLL_SPREAD_SPECTRUM, 0, ~SSEN_MASK);
+
+ /* set feedback divider */
+ WREG32_P(CG_UPLL_FUNC_CNTL_3, UPLL_FB_DIV(optimal_fb_div), ~UPLL_FB_DIV_MASK);
+
+ /* set ref divider to 0 */
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_REF_DIV_MASK);
+
+ if (optimal_vco_freq < 187500)
+ WREG32_P(CG_UPLL_FUNC_CNTL_4, 0, ~UPLL_SPARE_ISPARE9);
+ else
+ WREG32_P(CG_UPLL_FUNC_CNTL_4, UPLL_SPARE_ISPARE9, ~UPLL_SPARE_ISPARE9);
+
+ /* set PDIV_A and PDIV_B */
+ WREG32_P(CG_UPLL_FUNC_CNTL_2,
+ UPLL_PDIV_A(optimal_vclk_div) | UPLL_PDIV_B(optimal_dclk_div),
+ ~(UPLL_PDIV_A_MASK | UPLL_PDIV_B_MASK));
+
+ /* give the PLL some time to settle */
+ mdelay(15);
+
+ /* deassert PLL_RESET */
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_RESET_MASK);
+
+ mdelay(15);
+
+ /* switch from bypass mode to normal mode */
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_BYPASS_EN_MASK);
+
+ r = si_uvd_send_upll_ctlreq(rdev);
+ if (r)
+ return r;
+
+ /* switch VCLK and DCLK selection */
+ WREG32_P(CG_UPLL_FUNC_CNTL_2,
+ VCLK_SRC_SEL(2) | DCLK_SRC_SEL(2),
+ ~(VCLK_SRC_SEL_MASK | DCLK_SRC_SEL_MASK));
+
+ mdelay(100);
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/radeon/sid.h b/drivers/gpu/drm/radeon/sid.h
index 759f682..c84e09b 100644
--- a/drivers/gpu/drm/radeon/sid.h
+++ b/drivers/gpu/drm/radeon/sid.h
@@ -29,6 +29,35 @@
#define TAHITI_GB_ADDR_CONFIG_GOLDEN 0x12011003
#define VERDE_GB_ADDR_CONFIG_GOLDEN 0x12010002
+/* discrete uvd clocks */
+#define CG_UPLL_FUNC_CNTL 0x634
+# define UPLL_RESET_MASK 0x00000001
+# define UPLL_SLEEP_MASK 0x00000002
+# define UPLL_BYPASS_EN_MASK 0x00000004
+# define UPLL_CTLREQ_MASK 0x00000008
+# define UPLL_VCO_MODE_MASK 0x00000600
+# define UPLL_REF_DIV_MASK 0x001F0000
+# define UPLL_CTLACK_MASK 0x40000000
+# define UPLL_CTLACK2_MASK 0x80000000
+#define CG_UPLL_FUNC_CNTL_2 0x638
+# define UPLL_PDIV_A(x) ((x) << 0)
+# define UPLL_PDIV_A_MASK 0x0000007F
+# define UPLL_PDIV_B(x) ((x) << 8)
+# define UPLL_PDIV_B_MASK 0x00007F00
+# define VCLK_SRC_SEL(x) ((x) << 20)
+# define VCLK_SRC_SEL_MASK 0x01F00000
+# define DCLK_SRC_SEL(x) ((x) << 25)
+# define DCLK_SRC_SEL_MASK 0x3E000000
+#define CG_UPLL_FUNC_CNTL_3 0x63C
+# define UPLL_FB_DIV(x) ((x) << 0)
+# define UPLL_FB_DIV_MASK 0x01FFFFFF
+#define CG_UPLL_FUNC_CNTL_4 0x644
+# define UPLL_SPARE_ISPARE9 0x00020000
+#define CG_UPLL_FUNC_CNTL_5 0x648
+# define RESET_ANTI_MUX_MASK 0x00000200
+#define CG_UPLL_SPREAD_SPECTRUM 0x650
+# define SSEN_MASK 0x00000001
+
#define CG_MULT_THERMAL_STATUS 0x714
#define ASIC_MAX_TEMP(x) ((x) << 0)
#define ASIC_MAX_TEMP_MASK 0x000001ff
--
1.7.9.5
More information about the dri-devel
mailing list