diff options
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c index e8d4c311b80d..1b6b37aefc38 100644 --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c @@ -18,6 +18,8 @@ struct sun4i_tmds { struct clk_hw hw; struct sun4i_hdmi *hdmi; + + u8 div_offset; }; static inline struct sun4i_tmds *hw_to_tmds(struct clk_hw *hw) @@ -28,6 +30,7 @@ static inline struct sun4i_tmds *hw_to_tmds(struct clk_hw *hw) static unsigned long sun4i_tmds_calc_divider(unsigned long rate, unsigned long parent_rate, + u8 div_offset, u8 *div, bool *half) { @@ -35,7 +38,7 @@ static unsigned long sun4i_tmds_calc_divider(unsigned long rate, u8 best_m = 0, m; bool is_double; - for (m = 1; m < 16; m++) { + for (m = div_offset ?: 1; m < (16 + div_offset); m++) { u8 d; for (d = 1; d < 3; d++) { @@ -67,6 +70,7 @@ static unsigned long sun4i_tmds_calc_divider(unsigned long rate, static int sun4i_tmds_determine_rate(struct clk_hw *hw, struct clk_rate_request *req) { + struct sun4i_tmds *tmds = hw_to_tmds(hw); struct clk_hw *parent = NULL; unsigned long best_parent = 0; unsigned long rate = req->rate; @@ -85,7 +89,8 @@ static int sun4i_tmds_determine_rate(struct clk_hw *hw, continue; for (i = 1; i < 3; i++) { - for (j = 1; j < 16; j++) { + for (j = tmds->div_offset ?: 1; + j < (16 + tmds->div_offset); j++) { unsigned long ideal = rate * i * j; unsigned long rounded; @@ -129,7 +134,7 @@ static unsigned long sun4i_tmds_recalc_rate(struct clk_hw *hw, parent_rate /= 2; reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG); - reg = (reg >> 4) & 0xf; + reg = ((reg >> 4) & 0xf) + tmds->div_offset; if (!reg) reg = 1; @@ -144,7 +149,8 @@ static int sun4i_tmds_set_rate(struct clk_hw *hw, unsigned long rate, u32 reg; u8 div; - sun4i_tmds_calc_divider(rate, parent_rate, &div, &half); + sun4i_tmds_calc_divider(rate, parent_rate, tmds->div_offset, + &div, &half); reg = readl(tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG); reg &= ~SUN4I_HDMI_PAD_CTRL1_HALVE_CLK; @@ -154,7 +160,7 @@ static int sun4i_tmds_set_rate(struct clk_hw *hw, unsigned long rate, reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG); reg &= ~SUN4I_HDMI_PLL_CTRL_DIV_MASK; - writel(reg | SUN4I_HDMI_PLL_CTRL_DIV(div), + writel(reg | SUN4I_HDMI_PLL_CTRL_DIV(div - tmds->div_offset), tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG); return 0; @@ -221,6 +227,7 @@ int sun4i_tmds_create(struct sun4i_hdmi *hdmi) tmds->hdmi = hdmi; tmds->hw.init = &init; + tmds->div_offset = hdmi->variant->tmds_clk_div_offset; hdmi->tmds_clk = devm_clk_register(hdmi->dev, &tmds->hw); if (IS_ERR(hdmi->tmds_clk)) |