Add support for using the mipi pll as lcd clock source, this is necessary for getting higher dotclocks with lcd panels.
Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/video/sunxi_display.c | 41 ++++++++++++++++++++++++++++++++++------- 1 file changed, 34 insertions(+), 7 deletions(-)
diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index 75acf84..aad870e 100644 --- a/drivers/video/sunxi_display.c +++ b/drivers/video/sunxi_display.c @@ -521,6 +521,7 @@ static void sunxi_lcdc_pll_set(int tcon, int dotclock, int value, n, m, min_m, max_m, diff; int best_n = 0, best_m = 0, best_diff = 0x0FFFFFFF; int best_double = 0; + bool use_mipi_pll = false;
if (tcon == 0) { #ifdef CONFIG_VIDEO_LCD_IF_PARALLEL @@ -571,16 +572,42 @@ static void sunxi_lcdc_pll_set(int tcon, int dotclock, } }
- debug("dotclock: %dkHz = %dkHz: (%d * 3MHz * %d) / %d\n", - dotclock, (best_double + 1) * 3000 * best_n / best_m, - best_double + 1, best_n, best_m); +#ifdef CONFIG_MACH_SUN6I + /* + * Use the MIPI pll if we've been unable to find any matching setting + * for PLL3, this happens with high dotclocks because of min_m = 6. + */ + if (tcon == 0 && best_n == 0) { + use_mipi_pll = true; + best_m = 6; /* Minimum m for tcon0 */ + }
- clock_set_pll3(best_n * 3000000); + if (use_mipi_pll) { + clock_set_pll3(297000000); /* Fix the video pll at 297 MHz */ + clock_set_mipi_pll(best_m * dotclock * 1000); + debug("dotclock: %dkHz = %dkHz via mipi pll\n", + dotclock, clock_get_mipi_pll() / best_m / 1000); + } else +#endif + { + clock_set_pll3(best_n * 3000000); + debug("dotclock: %dkHz = %dkHz: (%d * 3MHz * %d) / %d\n", + dotclock, + (best_double + 1) * clock_get_pll3() / best_m / 1000, + best_double + 1, best_n, best_m); + }
if (tcon == 0) { - writel(CCM_LCD_CH0_CTRL_GATE | CCM_LCD_CH0_CTRL_RST | - (best_double ? CCM_LCD_CH0_CTRL_PLL3_2X : - CCM_LCD_CH0_CTRL_PLL3), + u32 pll; + + if (use_mipi_pll) + pll = CCM_LCD_CH0_CTRL_MIPI_PLL; + else if (best_double) + pll = CCM_LCD_CH0_CTRL_PLL3_2X; + else + pll = CCM_LCD_CH0_CTRL_PLL3; + + writel(CCM_LCD_CH0_CTRL_GATE | CCM_LCD_CH0_CTRL_RST | pll, &ccm->lcd0_ch0_clk_cfg); } else { writel(CCM_LCD_CH1_CTRL_GATE |