u32 ctrl1 = readl(priv->base + CRT_CTRL1);
u32 ctrl2 = readl(priv->base + CRT_CTRL2);
- /* SCU2C: set DAC source for display output to Graphics CRT (GFX) */
- regmap_update_bits(priv->scu, 0x2c, BIT(16), BIT(16));
+ /* Set DAC source for display output to Graphics CRT (GFX) */
+ regmap_update_bits(priv->scu, priv->dac_reg, BIT(16), BIT(16));
writel(ctrl1 | CRT_CTRL_EN, priv->base + CRT_CTRL1);
writel(ctrl2 | CRT_CTRL_DAC_EN, priv->base + CRT_CTRL2);
writel(ctrl1 & ~CRT_CTRL_EN, priv->base + CRT_CTRL1);
writel(ctrl2 & ~CRT_CTRL_DAC_EN, priv->base + CRT_CTRL2);
- regmap_update_bits(priv->scu, 0x2c, BIT(16), 0);
+ regmap_update_bits(priv->scu, priv->dac_reg, BIT(16), 0);
}
static void aspeed_gfx_crtc_mode_set_nofb(struct aspeed_gfx *priv)
* Terminal Count: memory size of one scan line
*/
d_offset = m->hdisplay * bpp / 8;
- t_count = (m->hdisplay * bpp + 127) / 128;
+ t_count = DIV_ROUND_UP(m->hdisplay * bpp, priv->scan_line_max);
+
writel(CRT_DISP_OFFSET(d_offset) | CRT_TERM_COUNT(t_count),
priv->base + CRT_OFFSET);
* Threshold: FIFO thresholds of refill and stop (16 byte chunks
* per line, rounded up)
*/
- writel(G5_CRT_THROD_VAL, priv->base + CRT_THROD);
+ writel(priv->throd_val, priv->base + CRT_THROD);
}
static void aspeed_gfx_pipe_enable(struct drm_simple_display_pipe *pipe,
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
* which is available under NDA from ASPEED.
*/
+struct aspeed_gfx_config {
+ u32 dac_reg; /* DAC register in SCU */
+ u32 vga_scratch_reg; /* VGA scratch register in SCU */
+ u32 throd_val; /* Default Threshold Seting */
+ u32 scan_line_max; /* Max memory size of one scan line */
+};
+
+static const struct aspeed_gfx_config ast2400_config = {
+ .dac_reg = 0x2c,
+ .vga_scratch_reg = 0x50,
+ .throd_val = CRT_THROD_LOW(0x1e) | CRT_THROD_HIGH(0x12),
+ .scan_line_max = 64,
+};
+
+static const struct aspeed_gfx_config ast2500_config = {
+ .dac_reg = 0x2c,
+ .vga_scratch_reg = 0x50,
+ .throd_val = CRT_THROD_LOW(0x24) | CRT_THROD_HIGH(0x3c),
+ .scan_line_max = 128,
+};
+
+static const struct of_device_id aspeed_gfx_match[] = {
+ { .compatible = "aspeed,ast2400-gfx", .data = &ast2400_config },
+ { .compatible = "aspeed,ast2500-gfx", .data = &ast2500_config },
+ { },
+};
+MODULE_DEVICE_TABLE(of, aspeed_gfx_match);
+
static const struct drm_mode_config_funcs aspeed_gfx_mode_config_funcs = {
.fb_create = drm_gem_fb_create,
.atomic_check = drm_atomic_helper_check,
return IRQ_NONE;
}
-
-
static int aspeed_gfx_load(struct drm_device *drm)
{
struct platform_device *pdev = to_platform_device(drm->dev);
struct aspeed_gfx *priv = to_aspeed_gfx(drm);
struct device_node *np = pdev->dev.of_node;
+ const struct aspeed_gfx_config *config;
+ const struct of_device_id *match;
struct resource *res;
int ret;
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
+ match = of_match_device(aspeed_gfx_match, &pdev->dev);
+ if (!match)
+ return -EINVAL;
+ config = match->data;
+
+ priv->dac_reg = config->dac_reg;
+ priv->vga_scratch_reg = config->vga_scratch_reg;
+ priv->throd_val = config->throd_val;
+ priv->scan_line_max = config->scan_line_max;
+
priv->scu = syscon_regmap_lookup_by_phandle(np, "syscon");
if (IS_ERR(priv->scu)) {
priv->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2500-scu");
.minor = 0,
};
-static const struct of_device_id aspeed_gfx_match[] = {
- { .compatible = "aspeed,ast2500-gfx" },
- { }
-};
-
-#define ASPEED_SCU_VGA0 0x50
-#define ASPEED_SCU_MISC_CTRL 0x2c
-
static ssize_t dac_mux_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
if (val > 3)
return -EINVAL;
- rc = regmap_update_bits(priv->scu, ASPEED_SCU_MISC_CTRL, 0x30000, val << 16);
+ rc = regmap_update_bits(priv->scu, priv->dac_reg, 0x30000, val << 16);
if (rc < 0)
return 0;
u32 reg;
int rc;
- rc = regmap_read(priv->scu, ASPEED_SCU_MISC_CTRL, ®);
+ rc = regmap_read(priv->scu, priv->dac_reg, ®);
if (rc)
return rc;
u32 reg;
int rc;
- rc = regmap_read(priv->scu, ASPEED_SCU_VGA0, ®);
+ rc = regmap_read(priv->scu, priv->vga_scratch_reg, ®);
if (rc)
return rc;