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authorAlex Deucher <alexander.deucher@amd.com>2012-11-28 16:55:21 -0500
committerAlex Deucher <alexander.deucher@amd.com>2014-08-27 12:47:53 -0400
commit4a956a70a8d4cc5268a60f6718de58892fa1275e (patch)
treef0a11235bb0d549ca2d8dc7e60dc74db6b8fabaf /drivers/gpu/drm/radeon/r600.c
parenta8fba64ab08cf4a5baf211f1126b475e03f90fc1 (diff)
downloadblackbird-op-linux-4a956a70a8d4cc5268a60f6718de58892fa1275e.tar.gz
blackbird-op-linux-4a956a70a8d4cc5268a60f6718de58892fa1275e.zip
drm/radeon: add set_uvd_clocks callback for r6xx v4
v2: wake up PLL, set [VD]CLK_SRC, cleanup code v3: handle RV670,RV635,RV620 as well v4: merge rv6xx and rs780/rs880 code, fix ref divider mask Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/r600.c')
-rw-r--r--drivers/gpu/drm/radeon/r600.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index e7dca47b7196..011d97f6fc7f 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -122,6 +122,94 @@ u32 r600_get_xclk(struct radeon_device *rdev)
int r600_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk)
{
+ unsigned fb_div = 0, ref_div, vclk_div = 0, dclk_div = 0;
+ int r;
+
+ /* 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));
+
+ /* assert BYPASS_EN, deassert UPLL_RESET, UPLL_SLEEP and UPLL_CTLREQ */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_BYPASS_EN_MASK, ~(
+ UPLL_RESET_MASK | UPLL_SLEEP_MASK | UPLL_CTLREQ_MASK));
+
+ if (rdev->family >= CHIP_RS780)
+ WREG32_P(GFX_MACRO_BYPASS_CNTL, UPLL_BYPASS_CNTL,
+ ~UPLL_BYPASS_CNTL);
+
+ if (!vclk || !dclk) {
+ /* keep the Bypass mode, put PLL to sleep */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_SLEEP_MASK, ~UPLL_SLEEP_MASK);
+ return 0;
+ }
+
+ if (rdev->clock.spll.reference_freq == 10000)
+ ref_div = 34;
+ else
+ ref_div = 4;
+
+ r = radeon_uvd_calc_upll_dividers(rdev, vclk, dclk, 50000, 160000,
+ ref_div + 1, 0xFFF, 2, 30, ~0,
+ &fb_div, &vclk_div, &dclk_div);
+ if (r)
+ return r;
+
+ if (rdev->family >= CHIP_RV670 && rdev->family < CHIP_RS780)
+ fb_div >>= 1;
+ else
+ fb_div |= 1;
+
+ r = radeon_uvd_send_upll_ctlreq(rdev, CG_UPLL_FUNC_CNTL);
+ if (r)
+ return r;
+
+ /* assert PLL_RESET */
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_RESET_MASK, ~UPLL_RESET_MASK);
+
+ /* For RS780 we have to choose ref clk */
+ if (rdev->family >= CHIP_RS780)
+ WREG32_P(CG_UPLL_FUNC_CNTL, UPLL_REFCLK_SRC_SEL_MASK,
+ ~UPLL_REFCLK_SRC_SEL_MASK);
+
+ /* set the required fb, ref and post divder values */
+ WREG32_P(CG_UPLL_FUNC_CNTL,
+ UPLL_FB_DIV(fb_div) |
+ UPLL_REF_DIV(ref_div),
+ ~(UPLL_FB_DIV_MASK | UPLL_REF_DIV_MASK));
+ WREG32_P(CG_UPLL_FUNC_CNTL_2,
+ UPLL_SW_HILEN(vclk_div >> 1) |
+ UPLL_SW_LOLEN((vclk_div >> 1) + (vclk_div & 1)) |
+ UPLL_SW_HILEN2(dclk_div >> 1) |
+ UPLL_SW_LOLEN2((dclk_div >> 1) + (dclk_div & 1)) |
+ UPLL_DIVEN_MASK | UPLL_DIVEN2_MASK,
+ ~UPLL_SW_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 */
+ WREG32_P(CG_UPLL_FUNC_CNTL, 0, ~UPLL_BYPASS_EN_MASK);
+
+ if (rdev->family >= CHIP_RS780)
+ WREG32_P(GFX_MACRO_BYPASS_CNTL, 0, ~UPLL_BYPASS_CNTL);
+
+ r = radeon_uvd_send_upll_ctlreq(rdev, CG_UPLL_FUNC_CNTL);
+ 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;
}
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