diff options
| -rw-r--r-- | drivers/video/tegra20/tegra-dc.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/drivers/video/tegra20/tegra-dc.c b/drivers/video/tegra20/tegra-dc.c index 5e3f6bf029a..ff67cc89892 100644 --- a/drivers/video/tegra20/tegra-dc.c +++ b/drivers/video/tegra20/tegra-dc.c @@ -36,6 +36,7 @@ struct tegra_lcd_priv { struct disp_ctlr *disp; /* Display controller to use */ fdt_addr_t frame_buffer; /* Address of frame buffer */ unsigned pixel_clock; /* Pixel clock in Hz */ + int dc_clk[2]; /* Contains clk and its parent */ }; enum { @@ -134,7 +135,7 @@ static int update_display_mode(struct dc_disp_reg *disp, * the display clock (typically 600MHz) to the pixel clock. We round * up or down as requried. */ - rate = clock_get_periph_rate(PERIPH_ID_DISP1, CLOCK_ID_CGENERAL); + rate = clock_get_periph_rate(priv->dc_clk[0], priv->dc_clk[1]); div = ((rate * 2 + priv->pixel_clock / 2) / priv->pixel_clock) - 2; debug("Display clock %lu, divider %lu\n", rate, div); @@ -269,20 +270,27 @@ static int tegra_display_probe(const void *blob, struct tegra_lcd_priv *priv, { struct disp_ctl_win window; struct dc_ctlr *dc; + unsigned long rate = clock_get_rate(priv->dc_clk[1]); priv->frame_buffer = (u32)default_lcd_base; dc = (struct dc_ctlr *)priv->disp; /* - * A header file for clock constants was NAKed upstream. - * TODO: Put this into the FDT and fdt_lcd struct when we have clock - * support there + * We halve the rate if DISP1 paret is PLLD, since actual parent + * is plld_out0 which is PLLD divided by 2. */ - clock_start_periph_pll(PERIPH_ID_HOST1X, CLOCK_ID_PERIPH, - 144 * 1000000); - clock_start_periph_pll(PERIPH_ID_DISP1, CLOCK_ID_CGENERAL, - 600 * 1000000); + if (priv->dc_clk[1] == CLOCK_ID_DISPLAY) + rate /= 2; + + /* + * HOST1X is init by default at 150MHz with PLLC as parent + */ + clock_start_periph_pll(PERIPH_ID_HOST1X, CLOCK_ID_CGENERAL, + 150 * 1000000); + clock_start_periph_pll(priv->dc_clk[0], priv->dc_clk[1], + rate); + basic_init(&dc->cmd); basic_init_timer(&dc->disp); rgb_enable(&dc->com); @@ -358,6 +366,13 @@ static int tegra_lcd_of_to_plat(struct udevice *dev) return -EINVAL; } + ret = clock_decode_pair(dev, priv->dc_clk); + if (ret < 0) { + debug("%s: Cannot decode clocks for '%s' (ret = %d)\n", + __func__, dev->name, ret); + return -EINVAL; + } + rgb = fdt_subnode_offset(blob, node, "rgb"); if (rgb < 0) { debug("%s: Cannot find rgb subnode for '%s' (ret=%d)\n", |