Am Mittwoch, den 27.07.2016, 16:31 +0800 schrieb Bibby Hsieh:
From: Junzhi Zhao junzhi.zhao@mediatek.com
In order to improve 4K resolution performance, we have to enhance the HDMI driving currend
^ Typo, s/currend/current/
Besides that, this patch looks good to me.
regards Philipp
when clock rate is greater than 165MHz.
Signed-off-by: Junzhi Zhao junzhi.zhao@mediatek.com Signed-off-by: Bibby Hsieh bibby.hsieh@mediatek.com
drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c | 42 +++++++++++++++++------- 1 file changed, 30 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c index 8a24754..51cb9cf 100644 --- a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c +++ b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c @@ -265,6 +265,9 @@ static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate, struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); unsigned int pre_div; unsigned int div;
unsigned int pre_ibias;
unsigned int hdmi_ibias;
unsigned int imp_en;
dev_dbg(hdmi_phy->dev, "%s: %lu Hz, parent: %lu Hz\n", __func__, rate, parent_rate);
@@ -298,18 +301,31 @@ static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate, (0x1 << PLL_BR_SHIFT), RG_HDMITX_PLL_BP | RG_HDMITX_PLL_BC | RG_HDMITX_PLL_BR);
- mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON3, RG_HDMITX_PRD_IMP_EN);
- if (rate < 165000000) {
mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON3,RG_HDMITX_PRD_IMP_EN);pre_ibias = 0x3;imp_en = 0x0;hdmi_ibias = hdmi_phy->ibias;- } else {
mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON3,RG_HDMITX_PRD_IMP_EN);pre_ibias = 0x6;imp_en = 0xf;hdmi_ibias = hdmi_phy->ibias_up;- } mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON4,
(0x3 << PRD_IBIAS_CLK_SHIFT) |(0x3 << PRD_IBIAS_D2_SHIFT) |(0x3 << PRD_IBIAS_D1_SHIFT) |(0x3 << PRD_IBIAS_D0_SHIFT),
(pre_ibias << PRD_IBIAS_CLK_SHIFT) |(pre_ibias << PRD_IBIAS_D2_SHIFT) |(pre_ibias << PRD_IBIAS_D1_SHIFT) |(pre_ibias << PRD_IBIAS_D0_SHIFT), RG_HDMITX_PRD_IBIAS_CLK | RG_HDMITX_PRD_IBIAS_D2 | RG_HDMITX_PRD_IBIAS_D1 | RG_HDMITX_PRD_IBIAS_D0);
(0x0 << DRV_IMP_EN_SHIFT), RG_HDMITX_DRV_IMP_EN);
(imp_en << DRV_IMP_EN_SHIFT),RG_HDMITX_DRV_IMP_EN);@@ -318,12 +334,14 @@ static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate, RG_HDMITX_DRV_IMP_CLK | RG_HDMITX_DRV_IMP_D2 | RG_HDMITX_DRV_IMP_D1 | RG_HDMITX_DRV_IMP_D0); mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON5,
(hdmi_phy->ibias << DRV_IBIAS_CLK_SHIFT) |(hdmi_phy->ibias << DRV_IBIAS_D2_SHIFT) |(hdmi_phy->ibias << DRV_IBIAS_D1_SHIFT) |(hdmi_phy->ibias << DRV_IBIAS_D0_SHIFT),RG_HDMITX_DRV_IBIAS_CLK | RG_HDMITX_DRV_IBIAS_D2 |RG_HDMITX_DRV_IBIAS_D1 | RG_HDMITX_DRV_IBIAS_D0);
(hdmi_ibias << DRV_IBIAS_CLK_SHIFT) |(hdmi_ibias << DRV_IBIAS_D2_SHIFT) |(hdmi_ibias << DRV_IBIAS_D1_SHIFT) |(hdmi_ibias << DRV_IBIAS_D0_SHIFT),RG_HDMITX_DRV_IBIAS_CLK |RG_HDMITX_DRV_IBIAS_D2 |RG_HDMITX_DRV_IBIAS_D1 |RG_HDMITX_DRV_IBIAS_D0);}