diff options
Diffstat (limited to 'src/soc/nvidia/tegra132/dsi.c')
| -rw-r--r-- | src/soc/nvidia/tegra132/dsi.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/soc/nvidia/tegra132/dsi.c b/src/soc/nvidia/tegra132/dsi.c index ad27b3d8b4..af2f592aa0 100644 --- a/src/soc/nvidia/tegra132/dsi.c +++ b/src/soc/nvidia/tegra132/dsi.c @@ -430,11 +430,14 @@ static void tegra_dsi_set_timeout(struct tegra_dsi *dsi, unsigned long bclk, static int tegra_output_dsi_setup_clock(struct tegra_dsi *dsi, const struct soc_nvidia_tegra132_config *config) { - unsigned int mul, div, num_lanes; // , vrefresh, num_lanes; + unsigned int mul, div, num_lanes; unsigned long bclk; unsigned long pclk = config->pixel_clock; int plld; int err; + struct display_controller *disp_ctrl = + (void *)config->display_controller; + unsigned int shift_clk_div; err = tegra_dsi_get_muldiv(dsi->format, &mul, &div); if (err < 0) @@ -471,6 +474,15 @@ static int tegra_output_dsi_setup_clock(struct tegra_dsi *dsi, return -1; } + /* + * Derive pixel clock from bit clock using the shift clock divider. + * Note that this is only half of what we would expect, but we need + * that to make up for the fact that we divided the bit clock by a + * factor of two above. + */ + shift_clk_div = ((8 * mul) / (div * num_lanes)) - 2; + update_display_shift_clock_divider(disp_ctrl, shift_clk_div); + tegra_dsi_set_timeout(dsi, bclk, config->refresh); return plld/1000000; } |