Commit 6385ed8e authored by Rex-BC Chen's avatar Rex-BC Chen Committed by Chun-Kuang Hu
Browse files

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: default avatarJitao Shi <jitao.shi@mediatek.com>
Signed-off-by: default avatarRex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: default avatarChun-Kuang Hu <chunkuang.hu@kernel.org>
parent 69777e6c

drivers/gpu/drm/mediatek/mtk_dpi.c

+24 −1
Original line number Diff line number Diff line
@@ -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;

	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)) {