| Subject | Re: [PATCH v5 12/36] drm/bridge: analogix_dp: Set PD_INC_BG first when powering up edp phy | From | Archit Taneja <> | Date | Wed, 14 Mar 2018 11:40:43 +0530 |
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On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote: > From: zain wang <wzz@rock-chips.com> > > Following the correct power up sequence: > dp_pd=ff => dp_pd=7f => wait 10us => dp_pd=00 >
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Thanks, Archit
> Cc: Stéphane Marchesin <marcheu@chromium.org> > Signed-off-by: zain wang <wzz@rock-chips.com> > Signed-off-by: Sean Paul <seanpaul@chromium.org> > Signed-off-by: Thierry Escande <thierry.escande@collabora.com> > Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> > Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > > drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 10 ++++++++-- > drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h | 3 +++ > 2 files changed, 11 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > index b47c5af43560..bb72f8b0e603 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > @@ -321,10 +321,16 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, > break; > case POWER_ALL: > if (enable) { > - reg = DP_PHY_PD | AUX_PD | CH3_PD | CH2_PD | > - CH1_PD | CH0_PD; > + reg = DP_ALL_PD; > writel(reg, dp->reg_base + phy_pd_addr); > } else { > + reg = DP_ALL_PD; > + writel(reg, dp->reg_base + phy_pd_addr); > + usleep_range(10, 15); > + reg &= ~DP_INC_BG; > + writel(reg, dp->reg_base + phy_pd_addr); > + usleep_range(10, 15); > + > writel(0x00, dp->reg_base + phy_pd_addr); > } > break; > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h > index 40200c652533..9602668669f4 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h > @@ -342,12 +342,15 @@ > #define DP_PLL_REF_BIT_1_2500V (0x7 << 0) > > /* ANALOGIX_DP_PHY_PD */ > +#define DP_INC_BG (0x1 << 7) > +#define DP_EXP_BG (0x1 << 6) > #define DP_PHY_PD (0x1 << 5) > #define AUX_PD (0x1 << 4) > #define CH3_PD (0x1 << 3) > #define CH2_PD (0x1 << 2) > #define CH1_PD (0x1 << 1) > #define CH0_PD (0x1 << 0) > +#define DP_ALL_PD (0xff) > > /* ANALOGIX_DP_PHY_TEST */ > #define MACRO_RST (0x1 << 5) >
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