fbdev: sh_mipi_dsi: add HSxxCLK support

SH MIPI manual explains the calculation method of HBP/HFP.
it is based on HSbyteCLK settings.
SH73a0 chip can use HS6divCLK/HS4divCLK for it.
This patch has compatibility to SH7372 mipi

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

diff --git a/arch/arm/mach-shmobile/board-ag5evm.c b/arch/arm/mach-shmobile/board-ag5evm.c
index 15072c5..7e3dd73 100644 (file)
--- a/arch/arm/mach-shmobile/board-ag5evm.c
+++ b/arch/arm/mach-shmobile/board-ag5evm.c
@@ -357,8 +357,9 @@ static struct sh_mipi_dsi_info mipidsi0_info = {
        .lane           = 2,
        .vsynw_offset   = 20,
        .clksrc         = 1,
-       .flags          = SH_MIPI_DSI_HSABM |
-                         SH_MIPI_DSI_SYNC_PULSES_MODE,
+       .flags          = SH_MIPI_DSI_HSABM             |
+                         SH_MIPI_DSI_SYNC_PULSES_MODE  |
+                         SH_MIPI_DSI_HSbyteCLK,
        .set_dot_clock  = sh_mipi_set_dot_clock,
 };
 

diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 73503ed..904b608 100644 (file)
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -606,7 +606,8 @@ static struct sh_mipi_dsi_info mipidsi0_info = {
        .lcd_chan       = &lcdc_info.ch[0],
        .lane           = 2,
        .vsynw_offset   = 17,
-       .flags          = SH_MIPI_DSI_SYNC_PULSES_MODE,
+       .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 77743f4..b8aea8c 100644 (file)
--- a/drivers/video/sh_mipi_dsi.c
+++ b/drivers/video/sh_mipi_dsi.c
@@ -153,7 +153,7 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi,
        void __iomem *base = mipi->base;
        struct sh_mobile_lcdc_chan_cfg *ch = pdata->lcd_chan;
        u32 pctype, datatype, pixfmt, linelength, vmctr2;
-       u32 tmp, top, bottom, delay;
+       u32 tmp, top, bottom, delay, div;
        bool yuv;
        int bpp;
 
@@ -364,17 +364,23 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi,
        bottom  = 0x00000001;
        delay   = 0;
 
+       div = 1;        /* HSbyteCLK is calculation base
+                        * HS4divCLK = HSbyteCLK/2
+                        * HS6divCLK is not supported for now */
+       if (pdata->flags & SH_MIPI_DSI_HS4divCLK)
+               div = 2;
+
        if (pdata->flags & SH_MIPI_DSI_HFPBM) { /* HBPLEN */
                top = ch->lcd_cfg[0].hsync_len + ch->lcd_cfg[0].left_margin;
-               top = ((pdata->lane * top) - 10) << 16;
+               top = ((pdata->lane * top / div) - 10) << 16;
        }
        if (pdata->flags & SH_MIPI_DSI_HBPBM) { /* HFPLEN */
                bottom = ch->lcd_cfg[0].right_margin;
-               bottom = (pdata->lane * bottom) - 12;
+               bottom = (pdata->lane * bottom / div) - 12;
        }
 
        bpp = linelength / ch->lcd_cfg[0].xres; /* byte / pixel */
-       if (pdata->lane > bpp) {
+       if ((pdata->lane / div) > bpp) {
                tmp = ch->lcd_cfg[0].xres / bpp; /* output cycle */
                tmp = ch->lcd_cfg[0].xres - tmp; /* (input - output) cycle */
                delay = (pdata->lane * tmp);

diff --git a/include/video/sh_mipi_dsi.h b/include/video/sh_mipi_dsi.h
index 310b883..434d56b 100644 (file)
--- a/include/video/sh_mipi_dsi.h
+++ b/include/video/sh_mipi_dsi.h
@@ -35,6 +35,10 @@ struct sh_mobile_lcdc_chan_cfg;
 #define SH_MIPI_DSI_HSEE       (1 << 5)
 #define SH_MIPI_DSI_HSAE       (1 << 6)
 
+#define SH_MIPI_DSI_HSbyteCLK  (1 << 24)
+#define SH_MIPI_DSI_HS6divCLK  (1 << 25)
+#define SH_MIPI_DSI_HS4divCLK  (1 << 26)
+
 #define SH_MIPI_DSI_SYNC_PULSES_MODE   (SH_MIPI_DSI_VSEE | \
                                         SH_MIPI_DSI_HSEE | \
                                         SH_MIPI_DSI_HSAE)