From 8f9c60f2e29717155227f225b557d3f1fda442bd Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Tue, 20 Mar 2012 18:34:10 -0700 Subject: [PATCH] fbdev: sh_mipi_dsi: add extra phyctrl for sh_mipi_dsi_info sh_mipi uses some clocks, but the method of setup depends on CPU. Current SuperH (like sh73a0) can control all of these clocks by CPG (Clock Pulse Generator). It means we can control it by clock framework only. But on sh7372, it needs CPG settings AND sh_mipi PHYCTRL::PLLDS, and only sh7372 has PHYCTRL::PLLDS. But on current sh_mipi driver, PHYCTRL::PLLDS of sh7372 was overwrote since the callback timing of clock setting was changed by c2658b70f06108361aa5024798f9c1bf47c73374 (fbdev: sh_mipi_dsi: fixup setup timing of sh_mipi_setup()). To solve this issue, this patch adds extra .phyctrl. This patch adds detail explanation for unclear mipi settings and fixup wrong PHYCTRL::PLLDS value for ap4evb (0xb -> 0x6). Signed-off-by: Kuninori Morimoto Signed-off-by: Florian Tobias Schandinat --- arch/arm/mach-shmobile/board-ap4evb.c | 12 +++++++++--- drivers/video/sh_mipi_dsi.c | 2 +- include/video/sh_mipi_dsi.h | 1 + 3 files changed, 11 insertions(+), 4 deletions(-) diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c index 82483d5f200c..581ec66eef96 100644 --- a/arch/arm/mach-shmobile/board-ap4evb.c +++ b/arch/arm/mach-shmobile/board-ap4evb.c @@ -486,20 +486,25 @@ static struct platform_device keysc_device = { }; /* MIPI-DSI */ -#define PHYCTRL 0x0070 static int sh_mipi_set_dot_clock(struct platform_device *pdev, void __iomem *base, int enable) { struct clk *pck = clk_get(&pdev->dev, "dsip_clk"); - void __iomem *phy = base + PHYCTRL; if (IS_ERR(pck)) return PTR_ERR(pck); if (enable) { + /* + * DSIPCLK = 24MHz + * D-PHY = DSIPCLK * ((0x6*2)+1) = 312MHz (see .phyctrl) + * HsByteCLK = D-PHY/8 = 39MHz + * + * X * Y * FPS = + * (544+72+600+16) * (961+8+8+2) * 30 = 36.1MHz + */ clk_set_rate(pck, clk_round_rate(pck, 24000000)); - iowrite32(ioread32(phy) | (0xb << 8), phy); clk_enable(pck); } else { clk_disable(pck); @@ -530,6 +535,7 @@ static struct sh_mipi_dsi_info mipidsi0_info = { .lcd_chan = &lcdc_info.ch[0], .lane = 2, .vsynw_offset = 17, + .phyctrl = 0x6 << 8, .flags = SH_MIPI_DSI_SYNC_PULSES_MODE | SH_MIPI_DSI_HSbyteCLK, .set_dot_clock = sh_mipi_set_dot_clock, diff --git a/drivers/video/sh_mipi_dsi.c b/drivers/video/sh_mipi_dsi.c index 42ad0f707e88..4c6b84488561 100644 --- a/drivers/video/sh_mipi_dsi.c +++ b/drivers/video/sh_mipi_dsi.c @@ -273,7 +273,7 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi, iowrite32(0x00000001, base + PHYCTRL); udelay(200); /* Deassert resets, power on */ - iowrite32(0x03070001, base + PHYCTRL); + iowrite32(0x03070001 | pdata->phyctrl, base + PHYCTRL); /* * Default = ULPS enable | diff --git a/include/video/sh_mipi_dsi.h b/include/video/sh_mipi_dsi.h index 434d56b4a1a5..06c67fbc4eee 100644 --- a/include/video/sh_mipi_dsi.h +++ b/include/video/sh_mipi_dsi.h @@ -51,6 +51,7 @@ struct sh_mipi_dsi_info { int lane; unsigned long flags; u32 clksrc; + u32 phyctrl; /* for extra setting */ unsigned int vsynw_offset; int (*set_dot_clock)(struct platform_device *pdev, void __iomem *base, -- 2.20.1