[PATCH 08/10] drm/radeon: add set_uvd_clocks callback for r7xx v3
Christian König
deathsimple at vodafone.de
Tue Apr 2 16:18:37 PDT 2013
v2: avoid 64bit divide
v3: rv740 uses the evegreen upll configuration
Signed-off-by: Christian König <deathsimple at vodafone.de>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/radeon/radeon_asic.c | 1 +
drivers/gpu/drm/radeon/radeon_asic.h | 1 +
drivers/gpu/drm/radeon/rv770.c | 156 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/radeon/rv770d.h | 24 ++++++
4 files changed, 182 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 03228cb..19bf122 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1183,6 +1183,7 @@ static struct radeon_asic rv770_asic = {
.get_pcie_lanes = &r600_get_pcie_lanes,
.set_pcie_lanes = &r600_set_pcie_lanes,
.set_clock_gating = &radeon_atom_set_clock_gating,
+ .set_uvd_clocks = &rv770_set_uvd_clocks,
},
.pflip = {
.pre_page_flip = &rs600_pre_page_flip,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 365c964..2add526 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -424,6 +424,7 @@ int rv770_copy_dma(struct radeon_device *rdev,
struct radeon_fence **fence);
u32 rv770_get_xclk(struct radeon_device *rdev);
int rv770_uvd_resume(struct radeon_device *rdev);
+int rv770_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk);
/*
* evergreen
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 5a78cce..8149219 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -42,6 +42,162 @@
static void rv770_gpu_init(struct radeon_device *rdev);
void rv770_fini(struct radeon_device *rdev);
static void rv770_pcie_gen2_enable(struct radeon_device *rdev);
+int evergreen_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk);
+
+static int rv770_uvd_calc_post_div(unsigned target_freq,
+ unsigned vco_freq,
+ unsigned *div)
+{
+ /* 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;
+
+ /* out of range ? */
+ if (*div > 30)
+ return -1; /* forget it */
+
+ *div -= 1;
+ return vco_freq / (*div + 1);
+}
+
+static int rv770_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 rv770_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, vco_min = 50000, vco_max = 160000;
+ unsigned ref_freq = rdev->clock.spll.reference_freq;
+ int r;
+
+ /* RV740 uses evergreen uvd clk programming */
+ if (rdev->family == CHIP_RV740)
+ return evergreen_set_uvd_clocks(rdev, vclk, dclk);
+
+ /* loop through vco from low to high */
+ vco_min = max(max(vco_min, vclk), dclk);
+ for (vco_freq = vco_min; vco_freq <= vco_max; vco_freq += 500) {
+ uint64_t fb_div = (uint64_t)vco_freq * 43663;
+ int calc_clk, diff_score, diff_vclk, diff_dclk;
+ unsigned vclk_div, dclk_div;
+
+ do_div(fb_div, ref_freq);
+ fb_div |= 1;
+
+ /* fb div out of range ? */
+ if (fb_div > 0x03FFFFFF)
+ break; /* it can oly get worse */
+
+ /* calc vclk with current vco freq. */
+ calc_clk = rv770_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 = rv770_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 */
+ }
+ }
+
+ /* 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));
+
+ /* set UPLL_FB_DIV to 0x50000 */
+ WREG32_P(CG_UPLL_FUNC_CNTL_3, UPLL_FB_DIV(0x50000), ~UPLL_FB_DIV_MASK);
+
+ /* deassert UPLL_RESET */
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_RESET_MASK);
+
+ /* assert BYPASS EN and FB_DIV[0] <- ??? why? */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_BYPASS_EN_MASK, ~UPLL_BYPASS_EN_MASK);
+ WREG32_P(CG_UPLL_FUNC_CNTL_3, UPLL_FB_DIV(1), ~UPLL_FB_DIV(1));
+
+ r = rv770_uvd_send_upll_ctlreq(rdev);
+ if (r)
+ return r;
+
+ /* assert PLL_RESET */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_RESET_MASK, ~UPLL_RESET_MASK);
+
+ /* set the required FB_DIV, REF_DIV, Post divder values */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_REF_DIV(1), ~UPLL_REF_DIV_MASK);
+ WREG32_P(CG_UPLL_FUNC_CNTL_2,
+ UPLL_SW_HILEN(optimal_vclk_div >> 1) |
+ UPLL_SW_LOLEN((optimal_vclk_div >> 1) + (optimal_vclk_div & 1)) |
+ UPLL_SW_HILEN2(optimal_dclk_div >> 1) |
+ UPLL_SW_LOLEN2((optimal_dclk_div >> 1) + (optimal_dclk_div & 1)),
+ ~UPLL_SW_MASK);
+
+ WREG32_P(CG_UPLL_FUNC_CNTL_3, UPLL_FB_DIV(optimal_fb_div),
+ ~UPLL_FB_DIV_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);
+
+ /* deassert BYPASS EN and FB_DIV[0] <- ??? why? */
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_BYPASS_EN_MASK);
+ WREG32_P(CG_UPLL_FUNC_CNTL_3, 0, ~UPLL_FB_DIV(1));
+
+ r = rv770_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;
+}
#define PCIE_BUS_CLK 10000
#define TCLK (PCIE_BUS_CLK / 10)
diff --git a/drivers/gpu/drm/radeon/rv770d.h b/drivers/gpu/drm/radeon/rv770d.h
index da158b54..162b177 100644
--- a/drivers/gpu/drm/radeon/rv770d.h
+++ b/drivers/gpu/drm/radeon/rv770d.h
@@ -38,6 +38,30 @@
#define R7XX_MAX_PIPES 8
#define R7XX_MAX_PIPES_MASK 0xff
+/* 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(x) ((x) << 16)
+# define UPLL_REF_DIV_MASK 0x001F0000
+# define UPLL_CTLACK_MASK 0x40000000
+# define UPLL_CTLACK2_MASK 0x80000000
+#define CG_UPLL_FUNC_CNTL_2 0x71c
+# define UPLL_SW_HILEN(x) ((x) << 0)
+# define UPLL_SW_LOLEN(x) ((x) << 4)
+# define UPLL_SW_HILEN2(x) ((x) << 8)
+# define UPLL_SW_LOLEN2(x) ((x) << 12)
+# define UPLL_SW_MASK 0x0000FFFF
+# 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
+
/* Registers */
#define CB_COLOR0_BASE 0x28040
#define CB_COLOR1_BASE 0x28044
--
1.7.9.5
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