rockchip/rk3399: set edp pclk to 25MHz
It may cause an edp aux transfer error if the edp pclk is
set too high, so reduce it to 25MHz.
BUG=chrome-os-partner:60130
BRANCH=None
TEST=Build and Boot
Change-Id: Id1063baa5a82637b03c0f1f754181df074ab17cc
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 8f7ce31a7483e765ae0c86f8e62ef51413ee1596
Original-Change-Id: Ibb86c12c1d7c00dc3b4cc7a6bdf3bd6e895cd9f3
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/429410
Original-Commit-Ready: Julius Werner <jwerner@chromium.org>
Original-Tested-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/18178
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/soc/rockchip/rk3399/clock.c b/src/soc/rockchip/rk3399/clock.c
index 383a761..eb413a1 100644
--- a/src/soc/rockchip/rk3399/clock.c
+++ b/src/soc/rockchip/rk3399/clock.c
@@ -181,6 +181,13 @@
CLK_TSADC_DIV_CON_MASK = 0x3ff,
CLK_TSADC_DIV_CON_SHIFT = 0,
+ /* CLKSEL_CON44 */
+ CLK_PCLK_EDP_PLL_SEL_MASK = 1,
+ CLK_PCLK_EDP_PLL_SEL_SHIFT = 15,
+ CLK_PCLK_EDP_PLL_SEL_CPLL = 0,
+ CLK_PCLK_EDP_DIV_CON_MASK = 0x3f,
+ CLK_PCLK_EDP_DIV_CON_SHIFT = 8,
+
/* CLKSEL_CON47 & CLKSEL_CON48 */
ACLK_VOP_PLL_SEL_MASK = 0x3,
ACLK_VOP_PLL_SEL_SHIFT = 6,
@@ -838,3 +845,21 @@
/* Bits 5 and 4 are "second" and "first" global watchdog reset. */
return read32(&cru_ptr->glb_rst_st) & 0x30;
}
+
+void rkclk_configure_edp(unsigned int hz)
+{
+ int src_clk_div;
+
+ src_clk_div = CPLL_HZ / hz;
+ assert((src_clk_div - 1 <= 63) && (src_clk_div * hz == CPLL_HZ));
+
+ write32(&cru_ptr->clksel_con[44],
+ RK_CLRSETBITS(CLK_PCLK_EDP_PLL_SEL_MASK <<
+ CLK_PCLK_EDP_PLL_SEL_SHIFT |
+ CLK_PCLK_EDP_DIV_CON_MASK <<
+ CLK_PCLK_EDP_DIV_CON_SHIFT,
+ CLK_PCLK_EDP_PLL_SEL_CPLL <<
+ CLK_PCLK_EDP_PLL_SEL_SHIFT |
+ (src_clk_div - 1) <<
+ CLK_PCLK_EDP_DIV_CON_SHIFT));
+}