[PATCH 06/10] drm/radeon: add set_uvd_clocks callback for evergreen
Christian König
deathsimple at vodafone.de
Tue Apr 2 16:18:35 PDT 2013
From: Alex Deucher <alexander.deucher at amd.com>
v2: remove unneeded register definitions
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Christian König <deathsimple at vodafone.de>
---
drivers/gpu/drm/radeon/evergreen.c | 164 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/radeon/evergreend.h | 27 ++++++
drivers/gpu/drm/radeon/radeon_asic.c | 3 +
drivers/gpu/drm/radeon/radeon_asic.h | 1 +
4 files changed, 195 insertions(+)
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index bdd3d34..a6e7186 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -131,6 +131,170 @@ done:
return r;
}
+static int evergreen_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 evergreen_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 evergreen_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 = evergreen_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 = evergreen_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 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 = evergreen_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 = evergreen_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;
+}
+
void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev)
{
u16 ctl, v;
diff --git a/drivers/gpu/drm/radeon/evergreend.h b/drivers/gpu/drm/radeon/evergreend.h
index b6491a3..43e7d3f 100644
--- a/drivers/gpu/drm/radeon/evergreend.h
+++ b/drivers/gpu/drm/radeon/evergreend.h
@@ -53,6 +53,33 @@
#define RCU_IND_INDEX 0x100
#define RCU_IND_DATA 0x104
+/* discrete uvd clocks */
+#define CG_UPLL_FUNC_CNTL 0x718
+# define UPLL_RESET_MASK 0x00000001
+# define UPLL_SLEEP_MASK 0x00000002
+# define UPLL_BYPASS_EN_MASK 0x00000004
+# define UPLL_CTLREQ_MASK 0x00000008
+# define UPLL_REF_DIV_MASK 0x001F0000
+# define UPLL_VCO_MODE_MASK 0x00000200
+# define UPLL_CTLACK_MASK 0x40000000
+# define UPLL_CTLACK2_MASK 0x80000000
+#define CG_UPLL_FUNC_CNTL_2 0x71c
+# 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 0x720
+# define UPLL_FB_DIV(x) ((x) << 0)
+# define UPLL_FB_DIV_MASK 0x01FFFFFF
+#define CG_UPLL_FUNC_CNTL_4 0x854
+# define UPLL_SPARE_ISPARE9 0x00020000
+#define CG_UPLL_SPREAD_SPECTRUM 0x79c
+# define SSEN_MASK 0x00000001
+
/* fusion uvd clocks */
#define CG_DCLK_CNTL 0x610
# define DCLK_DIVIDER_MASK 0x7f
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index d3992d9..a65312c 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1278,6 +1278,7 @@ static struct radeon_asic evergreen_asic = {
.get_pcie_lanes = &r600_get_pcie_lanes,
.set_pcie_lanes = &r600_set_pcie_lanes,
.set_clock_gating = NULL,
+ .set_uvd_clocks = &evergreen_set_uvd_clocks,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,
@@ -1469,6 +1470,7 @@ static struct radeon_asic btc_asic = {
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = NULL,
+ .set_uvd_clocks = &evergreen_set_uvd_clocks,
},
.pflip = {
.pre_page_flip = &evergreen_pre_page_flip,
@@ -1607,6 +1609,7 @@ static struct radeon_asic cayman_asic = {
.get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = NULL,
+ .set_uvd_clocks = &evergreen_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 37f28a3..54a7ef7 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -460,6 +460,7 @@ extern void evergreen_pm_finish(struct radeon_device *rdev);
extern void sumo_pm_init_profile(struct radeon_device *rdev);
extern void btc_pm_init_profile(struct radeon_device *rdev);
int sumo_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk);
+int evergreen_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk);
extern void evergreen_pre_page_flip(struct radeon_device *rdev, int crtc);
extern u32 evergreen_page_flip(struct radeon_device *rdev, int crtc, u64 crtc_base);
extern void evergreen_post_page_flip(struct radeon_device *rdev, int crtc);
--
1.7.9.5
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