From 90eabbf0ec0c626cf5d186214cf8fc79150a7a29 Mon Sep 17 00:00:00 2001 From: Eric Miao Date: Wed, 30 Apr 2008 00:52:25 -0700 Subject: [PATCH] pxafb: move parallel LCD timing setup into dedicate function the new_regs stuff has been removed, and all the setup (modification to those fbi->reg_*) is protected with IRQ disabled * disable IRQ is too heavy here, provided that no IRQ context will touch the fbi->reg_* and the only possible contending place is in the CPUFREQ_POSTCHANGE (task context), a mutex will be better, leave this for future improvement Signed-off-by: eric miao Cc: "Antonino A. Daplas" Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/pxafb.c | 89 +++++++++++++++++++++++-------------------- drivers/video/pxafb.h | 8 ---- 2 files changed, 47 insertions(+), 50 deletions(-) diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c index a4ee7225fe2..d11ea78a06d 100644 --- a/drivers/video/pxafb.c +++ b/drivers/video/pxafb.c @@ -594,6 +594,43 @@ static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal, return 0; } +static void setup_parallel_timing(struct pxafb_info *fbi, + struct fb_var_screeninfo *var) +{ + unsigned int lines_per_panel, pcd = get_pcd(fbi, var->pixclock); + + fbi->reg_lccr1 = + LCCR1_DisWdth(var->xres) + + LCCR1_HorSnchWdth(var->hsync_len) + + LCCR1_BegLnDel(var->left_margin) + + LCCR1_EndLnDel(var->right_margin); + + /* + * If we have a dual scan LCD, we need to halve + * the YRES parameter. + */ + lines_per_panel = var->yres; + if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual) + lines_per_panel /= 2; + + fbi->reg_lccr2 = + LCCR2_DisHght(lines_per_panel) + + LCCR2_VrtSnchWdth(var->vsync_len) + + LCCR2_BegFrmDel(var->upper_margin) + + LCCR2_EndFrmDel(var->lower_margin); + + fbi->reg_lccr3 = fbi->lccr3 | + (var->sync & FB_SYNC_HOR_HIGH_ACT ? + LCCR3_HorSnchH : LCCR3_HorSnchL) | + (var->sync & FB_SYNC_VERT_HIGH_ACT ? + LCCR3_VrtSnchH : LCCR3_VrtSnchL); + + if (pcd) { + fbi->reg_lccr3 |= LCCR3_PixClkDiv(pcd); + set_hsync_time(fbi, pcd); + } +} + /* * pxafb_activate_var(): * Configures LCD Controller based on entries in var parameter. @@ -602,9 +639,7 @@ static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal, static int pxafb_activate_var(struct fb_var_screeninfo *var, struct pxafb_info *fbi) { - struct pxafb_lcd_reg new_regs; u_long flags; - u_int lines_per_panel, pcd = get_pcd(fbi, var->pixclock); size_t nbytes; #if DEBUG_VAR @@ -645,61 +680,31 @@ static int pxafb_activate_var(struct fb_var_screeninfo *var, printk(KERN_ERR "%s: invalid lower_margin %d\n", fbi->fb.fix.id, var->lower_margin); #endif + /* Update shadow copy atomically */ + local_irq_save(flags); + + setup_parallel_timing(fbi, var); - new_regs.lccr0 = fbi->lccr0 | + fbi->reg_lccr0 = fbi->lccr0 | (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | LCCR0_QDM | LCCR0_BM | LCCR0_OUM); - new_regs.lccr1 = - LCCR1_DisWdth(var->xres) + - LCCR1_HorSnchWdth(var->hsync_len) + - LCCR1_BegLnDel(var->left_margin) + - LCCR1_EndLnDel(var->right_margin); - - /* - * If we have a dual scan LCD, we need to halve - * the YRES parameter. - */ - lines_per_panel = var->yres; - if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual) - lines_per_panel /= 2; - - new_regs.lccr2 = - LCCR2_DisHght(lines_per_panel) + - LCCR2_VrtSnchWdth(var->vsync_len) + - LCCR2_BegFrmDel(var->upper_margin) + - LCCR2_EndFrmDel(var->lower_margin); + fbi->reg_lccr3 |= pxafb_bpp_to_lccr3(var); - new_regs.lccr3 = fbi->lccr3 | - pxafb_bpp_to_lccr3(var) | - (var->sync & FB_SYNC_HOR_HIGH_ACT ? - LCCR3_HorSnchH : LCCR3_HorSnchL) | - (var->sync & FB_SYNC_VERT_HIGH_ACT ? - LCCR3_VrtSnchH : LCCR3_VrtSnchL); + nbytes = var->yres * fbi->fb.fix.line_length; - if (pcd) - new_regs.lccr3 |= LCCR3_PixClkDiv(pcd); - - /* Update shadow copy atomically */ - local_irq_save(flags); - - nbytes = lines_per_panel * fbi->fb.fix.line_length; - - if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual) + if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual) { + nbytes = nbytes / 2; setup_frame_dma(fbi, DMA_LOWER, PAL_NONE, nbytes, nbytes); + } if (var->bits_per_pixel >= 16) setup_frame_dma(fbi, DMA_BASE, PAL_NONE, 0, nbytes); else setup_frame_dma(fbi, DMA_BASE, PAL_BASE, 0, nbytes); - fbi->reg_lccr0 = new_regs.lccr0; - fbi->reg_lccr1 = new_regs.lccr1; - fbi->reg_lccr2 = new_regs.lccr2; - fbi->reg_lccr3 = new_regs.lccr3; fbi->reg_lccr4 = lcd_readl(fbi, LCCR4) & ~LCCR4_PAL_FOR_MASK; fbi->reg_lccr4 |= (fbi->lccr4 & LCCR4_PAL_FOR_MASK); - set_hsync_time(fbi, pcd); local_irq_restore(flags); /* diff --git a/drivers/video/pxafb.h b/drivers/video/pxafb.h index f47f139fc5e..c627b83497d 100644 --- a/drivers/video/pxafb.h +++ b/drivers/video/pxafb.h @@ -21,14 +21,6 @@ * for more details. */ -/* Shadows for LCD controller registers */ -struct pxafb_lcd_reg { - unsigned int lccr0; - unsigned int lccr1; - unsigned int lccr2; - unsigned int lccr3; -}; - /* PXA LCD DMA descriptor */ struct pxafb_dma_descriptor { unsigned int fdadr; -- 2.41.1