diff options
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_mipi_tx.c')
-rw-r--r-- | drivers/gpu/drm/mediatek/mtk_mipi_tx.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c index e301af64809e..8cee2591e728 100644 --- a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c +++ b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c @@ -88,6 +88,44 @@ static const struct phy_ops mtk_mipi_tx_ops = { .owner = THIS_MODULE, }; +static void mtk_mipi_tx_get_calibration_datal(struct mtk_mipi_tx *mipi_tx) +{ + struct nvmem_cell *cell; + size_t len; + u32 *buf; + + cell = nvmem_cell_get(mipi_tx->dev, "calibration-data"); + if (IS_ERR(cell)) { + dev_info(mipi_tx->dev, "can't get nvmem_cell_get, ignore it\n"); + return; + } + buf = (u32 *)nvmem_cell_read(cell, &len); + nvmem_cell_put(cell); + + if (IS_ERR(buf)) { + dev_info(mipi_tx->dev, "can't get data, ignore it\n"); + return; + } + + if (len < 3 * sizeof(u32)) { + dev_info(mipi_tx->dev, "invalid calibration data\n"); + kfree(buf); + return; + } + + mipi_tx->rt_code[0] = ((buf[0] >> 6 & 0x1f) << 5) | + (buf[0] >> 11 & 0x1f); + mipi_tx->rt_code[1] = ((buf[1] >> 27 & 0x1f) << 5) | + (buf[0] >> 1 & 0x1f); + mipi_tx->rt_code[2] = ((buf[1] >> 17 & 0x1f) << 5) | + (buf[1] >> 22 & 0x1f); + mipi_tx->rt_code[3] = ((buf[1] >> 7 & 0x1f) << 5) | + (buf[1] >> 12 & 0x1f); + mipi_tx->rt_code[4] = ((buf[2] >> 27 & 0x1f) << 5) | + (buf[1] >> 2 & 0x1f); + kfree(buf); +} + static int mtk_mipi_tx_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -174,6 +212,8 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev) mipi_tx->dev = dev; + mtk_mipi_tx_get_calibration_datal(mipi_tx); + return of_clk_add_provider(dev->of_node, of_clk_src_simple_get, mipi_tx->pll); } |