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drm/mediatek: dpi: Add dual edge sample mode support

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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>
This commit is contained in:
Rex-BC Chen
2021-05-26 16:52:17 +08:00
committed by Chun-Kuang Hu
parent 69777e6ca3
commit 6385ed8eaa
1 changed files with 24 additions and 1 deletions
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drivers/gpu/drm/mediatek/mtk_dpi.c
+24 -1
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@@ -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)) {