video: da8xx-fb: Increased resolution configuration of revised LCDC IP (4d740801) · Commits · 戴 / test

Revised LCD controller in upcoming TI SoC which is an updated version of LCDC IP that was found on TI's DA850 SoC supports 2048*2048 resolution. Below are the encoding details: Width: Pixels Per Line = {pplmsb, ppllsb, 4'b1111} + 1 Where pplmsb:1bit==>Raster Timing0[3], ppllsb:6bits==>Raster Timing0[9:4]. And encoded value can range from 16 to 2048 in multiples of 16. Height: Lines Per Panel = {lpp_b10, lpp} Where lpp:10bits==>Raster Timing1[9:0], lpp_b10:1bit==>Raster Timing2[26]. And encoded value can range from 1 to 2048, programmable range is 0 to 2047. Patch is verified on emulation platform of upcoming SoC for updated feature and on DA850 platform to make sure nothing existing breaks. Signed-off-by:

Manjunathappa, Prakash <prakash.pm@ti.com> Signed-off-by:

Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

drivers/video/da8xx-fb.c

+28 −3

Original line number	Diff line number	Diff line
		@@ -460,18 +460,43 @@ static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,

		/* Set the Panel Width */
		/* Pixels per line = (PPL + 1)16 /
		/0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels/
		if (lcd_revision == LCD_VERSION_1) {
		/*
		* 0x3F in bits 4..9 gives max horizontal resolution = 1024
		* pixels.
		*/
		width &= 0x3f0;
		} else {
		/*
		* 0x7F in bits 4..10 gives max horizontal resolution = 2048
		* pixels.
		*/
		width &= 0x7f0;
		}

		reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
		reg &= 0xfffffc00;
		if (lcd_revision == LCD_VERSION_1) {
		reg \|= ((width >> 4) - 1) << 4;
		} else {
		width = (width >> 4) - 1;
		reg \|= ((width & 0x3f) << 4) \| ((width & 0x40) >> 3);
		}
		lcdc_write(reg, LCD_RASTER_TIMING_0_REG);

		/* Set the Panel Height */
		/* Set bits 9:0 of Lines Per Pixel */
		reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
		reg = ((height - 1) & 0x3ff) \| (reg & 0xfffffc00);
		lcdc_write(reg, LCD_RASTER_TIMING_1_REG);

		/* Set bit 10 of Lines Per Pixel */
		if (lcd_revision == LCD_VERSION_2) {
		reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
		reg \|= ((height - 1) & 0x400) << 16;
		lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
		}

		/* Set the Raster Order of the Frame Buffer */
		reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
		if (raster_order)

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