Sean, On 06/23/2016 09:27 PM, Sean Paul wrote: > On Tue, Jun 14, 2016 at 7:46 AM, Yakir Yang <ykk at rock-chips.com> 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 at rock-chips.com> >> Tested-by: Javier Martinez Canillas <javier at osg.samsung.com> >> --- >> 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 at 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 == ... > } Good idea, done. Thanks, - Yakir > Sean > >> struct drm_panel *panel; >> struct drm_encoder *encoder; >> struct drm_connector *connector; >> -- >> 1.9.1 >> >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel at lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/dri-devel > >
