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video: tegra20: dc: parameterize V- and H-sync polarities

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Based on Thierry Reding's Linux commit:

'commit 1716b1891e1de05e2c20ccafa9f58550f3539717
("drm/tegra: rgb: Parameterize V- and H-sync polarities")'

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Svyatoslav Ryhel
2024-01-23 19:16:27 +02:00
committed by Anatolij Gustschin
parent eb81700018
commit 8fea3369ee
2 changed files with 25 additions and 2 deletions
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5
arch/arm/include/asm/arch-tegra/dc.h
View File

@@ -443,6 +443,11 @@ enum win_color_depth_id {
#define WINDOW_D_SELECT BIT(7)
#define WINDOW_H_SELECT BIT(8)
/* DC_COM_PIN_OUTPUT_POLARITY1 0x307 */
#define LHS_OUTPUT_POLARITY_LOW BIT(30)
#define LVS_OUTPUT_POLARITY_LOW BIT(28)
#define LSC0_OUTPUT_POLARITY_LOW BIT(24)
/* DC_DISP_DISP_WIN_OPTIONS 0x402 */
#define CURSOR_ENABLE BIT(16)
#define SOR_ENABLE BIT(25)

22
drivers/video/tegra20/tegra-dc.c
View File

@@ -218,8 +218,11 @@ static const u32 rgb_sel_tab[PIN_OUTPUT_SEL_COUNT] = {
0x00020000,
};
static void rgb_enable(struct dc_com_reg *com)
static void rgb_enable(struct tegra_lcd_priv *priv)
{
struct dc_com_reg *com = &priv->dc->com;
struct display_timing *dt = &priv->timing;
u32 value;
int i;
for (i = 0; i < PIN_REG_COUNT; i++) {
@@ -228,6 +231,21 @@ static void rgb_enable(struct dc_com_reg *com)
writel(rgb_data_tab[i], &com->pin_output_data[i]);
}
/* configure H- and V-sync signal polarities */
value = readl(&com->pin_output_polarity[1]);
if (dt->flags & DISPLAY_FLAGS_HSYNC_LOW)
value |= LHS_OUTPUT_POLARITY_LOW;
else
value &= ~LHS_OUTPUT_POLARITY_LOW;
if (dt->flags & DISPLAY_FLAGS_VSYNC_LOW)
value |= LVS_OUTPUT_POLARITY_LOW;
else
value &= ~LVS_OUTPUT_POLARITY_LOW;
writel(value, &com->pin_output_polarity[1]);
for (i = 0; i < PIN_OUTPUT_SEL_COUNT; i++)
writel(rgb_sel_tab[i], &com->pin_output_sel[i]);
}
@@ -327,7 +345,7 @@ static int tegra_display_probe(struct tegra_lcd_priv *priv,
basic_init_timer(&priv->dc->disp);
if (priv->soc->has_rgb)
rgb_enable(&priv->dc->com);
rgb_enable(priv);
if (priv->pixel_clock)
update_display_mode(priv);