On Tue, Jun 14, 2016 at 7:46 AM, Yakir Yang <ykk@xxxxxxxxxxxxxx> wrote: > As vendor document indicate, when REF_CLK bit set 0, then DP > phy's REF_CLK should switch to 24M source clock. > > But due to IC PHY layout mistaken, some chips need to flip this > bit(like RK3288), and unfortunately they didn't indicate in the > DP version register. That's why we have to make this little hack. > > Signed-off-by: Yakir Yang <ykk@xxxxxxxxxxxxxx> > Tested-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx> > --- > Changes in v3: > - Make this hack code more clear (Tomasz, reviewed at Google Gerrit) > reg = ~reg & REF_CLK_MASK; ---> reg ^= REF_CLK_MASK; > [https://chromium-review.googlesource.com/#/c/346852/7/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c@80] > - Add tested flag from Javier > > Changes in v2: > - new patch in v2 > > drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 6 +++++- > drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h | 1 + > drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 3 +++ > include/drm/bridge/analogix_dp.h | 5 +++++ > 4 files changed, 14 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > index 931a76c..97ced6b 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > @@ -75,7 +75,11 @@ void analogix_dp_init_analog_param(struct analogix_dp_device *dp) > writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_2); > > if (dp->plat_data && (dp->plat_data->dev_type == ROCKCHIP_DP)) { > - writel(REF_CLK_24M, dp->reg_base + ANALOGIX_DP_PLL_REG_1); > + reg = REF_CLK_24M; > + if (dp->plat_data->subdev_type == RK3288_DP) > + reg ^= REF_CLK_MASK; > + > + writel(reg, dp->reg_base + ANALOGIX_DP_PLL_REG_1); > writel(0x95, dp->reg_base + ANALOGIX_DP_PLL_REG_2); > writel(0x40, dp->reg_base + ANALOGIX_DP_PLL_REG_3); > writel(0x58, dp->reg_base + ANALOGIX_DP_PLL_REG_4); > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h > index 88d56ad..cdcc6c5 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h > @@ -165,6 +165,7 @@ > /* ANALOGIX_DP_PLL_REG_1 */ > #define REF_CLK_24M (0x1 << 0) > #define REF_CLK_27M (0x0 << 0) > +#define REF_CLK_MASK (0x1 << 0) > > /* ANALOGIX_DP_LANE_MAP */ > #define LANE3_MAP_LOGIC_LANE_0 (0x0 << 6) > diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c > index 3855f46..315ebba 100644 > --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c > +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c > @@ -46,6 +46,7 @@ struct rockchip_dp_chip_data { > u32 lcdsel_grf_reg; > u32 lcdsel_big; > u32 lcdsel_lit; > + u32 chip_type; > }; > > struct rockchip_dp_device { > @@ -286,6 +287,7 @@ static int rockchip_dp_bind(struct device *dev, struct device *master, > dp->plat_data.encoder = &dp->encoder; > > dp->plat_data.dev_type = ROCKCHIP_DP; > + dp->plat_data.subdev_type = dp_data->chip_type; > dp->plat_data.power_on = rockchip_dp_poweron; > dp->plat_data.power_off = rockchip_dp_powerdown; > > @@ -384,6 +386,7 @@ static const struct rockchip_dp_chip_data rk3288_dp = { > .lcdsel_grf_reg = 0x025c, > .lcdsel_big = 0 | BIT(21), > .lcdsel_lit = BIT(5) | BIT(21), > + .chip_type = RK3288_DP, > }; > > static const struct of_device_id rockchip_dp_dt_ids[] = { > diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h > index 9e5d013..06c0250 100644 > --- a/include/drm/bridge/analogix_dp.h > +++ b/include/drm/bridge/analogix_dp.h > @@ -18,8 +18,13 @@ enum analogix_dp_devtype { > ROCKCHIP_DP, > }; > > +enum analogix_dp_sub_devtype { > + RK3288_DP, > +}; > + > struct analogix_dp_plat_data { > enum analogix_dp_devtype dev_type; > + enum analogix_dp_sub_devtype subdev_type; So this is what I was talking about in my review of the first patch of the series. I don't personally think the dev and subdev types add any clarity here, just more state. I'd prefer that you put the product number in the top level devtype, and add a helper function like: static bool is_rockchip(enum analogix_dp_devtype type) { return type == ... || type == ... } Sean > struct drm_panel *panel; > struct drm_encoder *encoder; > struct drm_connector *connector; > -- > 1.9.1 > > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
