diff options
| author | Rex-BC Chen <rex-bc.chen@mediatek.com> | 2021-05-26 11:52:17 +0300 |
|---|---|---|
| committer | Chun-Kuang Hu <chunkuang.hu@kernel.org> | 2021-06-04 03:23:01 +0300 |
| commit | 6385ed8eaa02190c3a6f9b18790ada785ebf5253 (patch) | |
| tree | 1cd65b6d32ac9ae02c4ffc0615a5e0ff361f3f4e /drivers/gpu/drm/mediatek | |
| parent | 69777e6ca396f0a7e1baff40fcad4a9d3d445b7a (diff) | |
| download | linux-6385ed8eaa02190c3a6f9b18790ada785ebf5253.tar.xz | |
drm/mediatek: dpi: Add dual edge sample mode support
To support RGB888_2X12_LE and RGB888_2X12_BE, dpi should sample
on dual edge which could recude half data io pins.
For RGB888_1X24, dpi just sample on single edge (rising or falling
edge).
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/mediatek')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_dpi.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c index bea91c81626e..7cf5e1d2a610 100644 --- a/drivers/gpu/drm/mediatek/mtk_dpi.c +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c @@ -83,6 +83,7 @@ struct mtk_dpi { struct pinctrl *pinctrl; struct pinctrl_state *pins_gpio; struct pinctrl_state *pins_dpi; + u32 output_fmt; int refcount; }; @@ -381,6 +382,20 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi, } } +static void mtk_dpi_dual_edge(struct mtk_dpi *dpi) +{ + if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) || + (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) { + mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE, + DDR_EN | DDR_4PHASE); + mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, + dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE ? + EDGE_SEL : 0, EDGE_SEL); + } else { + mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE, 0); + } +} + static void mtk_dpi_power_off(struct mtk_dpi *dpi) { if (WARN_ON(dpi->refcount == 0)) @@ -455,7 +470,13 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi, pll_rate = clk_get_rate(dpi->tvd_clk); vm.pixelclock = pll_rate / factor; - clk_set_rate(dpi->pixel_clk, vm.pixelclock); + if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) || + (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) + clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2); + else + clk_set_rate(dpi->pixel_clk, vm.pixelclock); + + vm.pixelclock = clk_get_rate(dpi->pixel_clk); dev_dbg(dpi->dev, "Got PLL %lu Hz, pixel clock %lu Hz\n", @@ -519,6 +540,7 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi, mtk_dpi_config_yc_map(dpi, dpi->yc_map); mtk_dpi_config_color_format(dpi, dpi->color_format); mtk_dpi_config_2n_h_fre(dpi); + mtk_dpi_dual_edge(dpi); mtk_dpi_config_disable_edge(dpi); mtk_dpi_sw_reset(dpi, false); @@ -718,6 +740,7 @@ static int mtk_dpi_probe(struct platform_device *pdev) dpi->dev = dev; dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev); + dpi->output_fmt = MEDIA_BUS_FMT_RGB888_1X24; dpi->pinctrl = devm_pinctrl_get(&pdev->dev); if (IS_ERR(dpi->pinctrl)) { |