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rockchip: rk3399: set edp pclk to 25MHz

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it may cause edp aux transfer error if set the edp pclk clock too high,
so reduce it to 25MHz.

BUG=chrome-os-partner:60130
BRANCH=None
TEST=Build and Boot

Change-Id: Ibb86c12c1d7c00dc3b4cc7a6bdf3bd6e895cd9f3
Signed-off-by: Lin Huang <hl@rock-chips.com>
Reviewed-on: https://chromium-review.googlesource.com/429410
Commit-Ready: Julius Werner <jwerner@chromium.org>
Tested-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Lin Huang 2017-01-18 09:44:34 +08:00 • committed by chrome-bot
commit 8f7ce31a74
3 changed files with 27 additions and 0 deletions
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25
src/soc/rockchip/rk3399/clock.c
View file

@ -181,6 +181,13 @@ enum {
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,
@ -837,3 +844,21 @@ int rkclk_was_watchdog_reset(void)
/* 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));
}

1
src/soc/rockchip/rk3399/display.c
View file

@ -65,6 +65,7 @@ void rk_display_init(device_t dev)
case VOP_MODE_EDP:
printk(BIOS_DEBUG, "Attempting to set up EDP display.\n");
rkclk_configure_vop_aclk(vop_id, 200 * MHz);
rkclk_configure_edp(25 * MHz);
/* select edp signal from vop0 */
write32(&rk3399_grf->soc_con20, RK_CLRBITS(1 << 5));

1
src/soc/rockchip/rk3399/include/soc/clock.h
View file

@ -119,5 +119,6 @@ void rkclk_configure_vop_aclk(u32 vop_id, u32 aclk_hz);
void rkclk_ddr_reset(u32 ch, u32 ctl, u32 phy);
int rkclk_was_watchdog_reset(void);
uint32_t rkclk_i2c_clock_for_bus(unsigned bus);
void rkclk_configure_edp(unsigned int hz);
#endif /* __SOC_ROCKCHIP_RK3399_CLOCK_H__ */