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at91: video: Prepare for driver-model conversion

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Adjust the driver to use struct display_timing for its display timing.
This is what is used by driver-model and allows the LCD init code to be
common.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
This commit is contained in:
Simon Glass 2016-05-05 07:28:19 -06:00 committed by Andreas Bießmann
parent 88a7fffe38
commit d63ec26a49
1 changed files with 70 additions and 36 deletions
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106
drivers/video/atmel_lcdfb.c
View File

@ -7,6 +7,7 @@
*/
#include <common.h>
#include <fdtdec.h>
#include <asm/io.h>
#include <asm/arch/gpio.h>
#include <asm/arch/clk.h>
@ -91,39 +92,41 @@ void lcd_set_cmap(struct bmp_image *bmp, unsigned colors)
}
}
void lcd_ctrl_init(void *lcdbase)
static void atmel_fb_init(ulong addr, struct display_timing *timing, int bpix,
bool tft, bool cont_pol_low, ulong lcdbase)
{
unsigned long value;
void *reg = (void *)addr;
/* Turn off the LCD controller and the DMA controller */
lcdc_writel(panel_info.mmio, ATMEL_LCDC_PWRCON,
lcdc_writel(reg, ATMEL_LCDC_PWRCON,
ATMEL_LCDC_GUARD_TIME << ATMEL_LCDC_GUARDT_OFFSET);
/* Wait for the LCDC core to become idle */
while (lcdc_readl(panel_info.mmio, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
while (lcdc_readl(reg, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
udelay(10);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMACON, 0);
lcdc_writel(reg, ATMEL_LCDC_DMACON, 0);
/* Reset LCDC DMA */
lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMACON, ATMEL_LCDC_DMARST);
lcdc_writel(reg, ATMEL_LCDC_DMACON, ATMEL_LCDC_DMARST);
/* ...set frame size and burst length = 8 words (?) */
value = (panel_info.vl_col * panel_info.vl_row *
NBITS(panel_info.vl_bpix)) / 32;
value = (timing->hactive.typ * timing->vactive.typ *
(1 << bpix)) / 32;
value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMAFRMCFG, value);
lcdc_writel(reg, ATMEL_LCDC_DMAFRMCFG, value);
/* Set pixel clock */
value = get_lcdc_clk_rate(0) / panel_info.vl_clk;
if (get_lcdc_clk_rate(0) % panel_info.vl_clk)
value = get_lcdc_clk_rate(0) / timing->pixelclock.typ;
if (get_lcdc_clk_rate(0) % timing->pixelclock.typ)
value++;
value = (value / 2) - 1;
if (!value) {
lcdc_writel(panel_info.mmio, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS);
lcdc_writel(reg, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS);
} else
lcdc_writel(panel_info.mmio, ATMEL_LCDC_LCDCON1,
lcdc_writel(reg, ATMEL_LCDC_LCDCON1,
value << ATMEL_LCDC_CLKVAL_OFFSET);
/* Initialize control register 2 */
@ -132,56 +135,87 @@ void lcd_ctrl_init(void *lcdbase)
#else
value = ATMEL_LCDC_MEMOR_LITTLE | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE;
#endif
if (panel_info.vl_tft)
if (tft)
value |= ATMEL_LCDC_DISTYPE_TFT;
value |= panel_info.vl_sync;
value |= (panel_info.vl_bpix << 5);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_LCDCON2, value);
if (!(timing->flags & DISPLAY_FLAGS_HSYNC_HIGH))
value |= ATMEL_LCDC_INVLINE_INVERTED;
if (!(timing->flags & DISPLAY_FLAGS_VSYNC_HIGH))
value |= ATMEL_LCDC_INVFRAME_INVERTED;
value |= bpix << 5;
lcdc_writel(reg, ATMEL_LCDC_LCDCON2, value);
/* Vertical timing */
value = (panel_info.vl_vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET;
value |= panel_info.vl_upper_margin << ATMEL_LCDC_VBP_OFFSET;
value |= panel_info.vl_lower_margin;
lcdc_writel(panel_info.mmio, ATMEL_LCDC_TIM1, value);
value = (timing->vsync_len.typ - 1) << ATMEL_LCDC_VPW_OFFSET;
value |= timing->vback_porch.typ << ATMEL_LCDC_VBP_OFFSET;
value |= timing->vfront_porch.typ;
/* Magic! (Datasheet says "Bit 31 must be written to 1") */
value |= 1U << 31;
lcdc_writel(reg, ATMEL_LCDC_TIM1, value);
/* Horizontal timing */
value = (panel_info.vl_right_margin - 1) << ATMEL_LCDC_HFP_OFFSET;
value |= (panel_info.vl_hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET;
value |= (panel_info.vl_left_margin - 1);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_TIM2, value);
value = (timing->hfront_porch.typ - 1) << ATMEL_LCDC_HFP_OFFSET;
value |= (timing->hsync_len.typ - 1) << ATMEL_LCDC_HPW_OFFSET;
value |= (timing->hback_porch.typ - 1);
lcdc_writel(reg, ATMEL_LCDC_TIM2, value);
/* Display size */
value = (panel_info.vl_col - 1) << ATMEL_LCDC_HOZVAL_OFFSET;
value |= panel_info.vl_row - 1;
lcdc_writel(panel_info.mmio, ATMEL_LCDC_LCDFRMCFG, value);
value = (timing->hactive.typ - 1) << ATMEL_LCDC_HOZVAL_OFFSET;
value |= timing->vactive.typ - 1;
lcdc_writel(reg, ATMEL_LCDC_LCDFRMCFG, value);
/* FIFO Threshold: Use formula from data sheet */
value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_FIFO, value);
lcdc_writel(reg, ATMEL_LCDC_FIFO, value);
/* Toggle LCD_MODE every frame */
lcdc_writel(panel_info.mmio, ATMEL_LCDC_MVAL, 0);
lcdc_writel(reg, ATMEL_LCDC_MVAL, 0);
/* Disable all interrupts */
lcdc_writel(panel_info.mmio, ATMEL_LCDC_IDR, ~0UL);
lcdc_writel(reg, ATMEL_LCDC_IDR, ~0UL);
/* Set contrast */
value = ATMEL_LCDC_PS_DIV8 |
ATMEL_LCDC_ENA_PWMENABLE;
if (!panel_info.vl_cont_pol_low)
if (!cont_pol_low)
value |= ATMEL_LCDC_POL_POSITIVE;
lcdc_writel(panel_info.mmio, ATMEL_LCDC_CONTRAST_CTR, value);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT);
lcdc_writel(reg, ATMEL_LCDC_CONTRAST_CTR, value);
lcdc_writel(reg, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT);
/* Set framebuffer DMA base address and pixel offset */
lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMABADDR1, (u_long)lcdbase);
lcdc_writel(reg, ATMEL_LCDC_DMABADDR1, lcdbase);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMACON, ATMEL_LCDC_DMAEN);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_PWRCON,
lcdc_writel(reg, ATMEL_LCDC_DMACON, ATMEL_LCDC_DMAEN);
lcdc_writel(reg, ATMEL_LCDC_PWRCON,
(ATMEL_LCDC_GUARD_TIME << ATMEL_LCDC_GUARDT_OFFSET) | ATMEL_LCDC_PWR);
}
void lcd_ctrl_init(void *lcdbase)
{
struct display_timing timing;
timing.flags = 0;
if (!(panel_info.vl_sync & ATMEL_LCDC_INVLINE_INVERTED))
timing.flags |= DISPLAY_FLAGS_HSYNC_HIGH;
if (!(panel_info.vl_sync & ATMEL_LCDC_INVFRAME_INVERTED))
timing.flags |= DISPLAY_FLAGS_VSYNC_LOW;
timing.pixelclock.typ = panel_info.vl_clk;
timing.hactive.typ = panel_info.vl_col;
timing.hfront_porch.typ = panel_info.vl_right_margin;
timing.hback_porch.typ = panel_info.vl_left_margin;
timing.hsync_len.typ = panel_info.vl_hsync_len;
timing.vactive.typ = panel_info.vl_row;
timing.vfront_porch.typ = panel_info.vl_clk;
timing.vback_porch.typ = panel_info.vl_clk;
timing.vsync_len.typ = panel_info.vl_clk;
atmel_fb_init(panel_info.mmio, &timing, panel_info.vl_bpix,
panel_info.vl_tft, panel_info.vl_cont_pol_low,
(ulong)lcdbase);
}
ulong calc_fbsize(void)
{
return ((panel_info.vl_col * panel_info.vl_row *