- sunxi display DDC probe fallback

- support 24bpp BMP files on 16bpp displays
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Merge tag 'video-for-2019.04-rc2' of git://git.denx.de/u-boot-video

- sunxi display DDC probe fallback
- support 24bpp BMP files on 16bpp displays

drivers/video/sunxi/sunxi_display.c

@@ -113,6 +113,13 @@ static int sunxi_hdmi_hpd_detect(int hpd_delay)
 	writel(SUNXI_HDMI_CTRL_ENABLE, &hdmi->ctrl);
 	writel(SUNXI_HDMI_PAD_CTRL0_HDP, &hdmi->pad_ctrl0);
 
+	/* Enable PLLs for eventual DDC */
+	writel(SUNXI_HDMI_PAD_CTRL1 | SUNXI_HDMI_PAD_CTRL1_HALVE,
+	       &hdmi->pad_ctrl1);
+	writel(SUNXI_HDMI_PLL_CTRL | SUNXI_HDMI_PLL_CTRL_DIV(15),
+	       &hdmi->pll_ctrl);
+	writel(SUNXI_HDMI_PLL_DBG0_PLL3, &hdmi->pll_dbg0);
+
 	while (timer_get_us() < tmo) {
 		if (readl(&hdmi->hpd) & SUNXI_HDMI_HPD_DETECT)
 			return 1;
@@ -203,7 +210,8 @@ static int sunxi_hdmi_edid_get_block(int block, u8 *buf)
 	return r;
 }
 
-static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode)
+static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode,
+				    bool verbose_mode)
 {
 	struct edid1_info edid1;
 	struct edid_cea861_info cea681[4];
@@ -215,13 +223,6 @@ static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode)
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 	int i, r, ext_blocks = 0;
 
-	/* SUNXI_HDMI_CTRL_ENABLE & PAD_CTRL0 are already set by hpd_detect */
-	writel(SUNXI_HDMI_PAD_CTRL1 | SUNXI_HDMI_PAD_CTRL1_HALVE,
-	       &hdmi->pad_ctrl1);
-	writel(SUNXI_HDMI_PLL_CTRL | SUNXI_HDMI_PLL_CTRL_DIV(15),
-	       &hdmi->pll_ctrl);
-	writel(SUNXI_HDMI_PLL_DBG0_PLL3, &hdmi->pll_dbg0);
-
 	/* Reset i2c controller */
 	setbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_DDC_GATE);
 	writel(SUNXI_HMDI_DDC_CTRL_ENABLE |
@@ -241,7 +242,8 @@ static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode)
 	if (r == 0) {
 		r = edid_check_info(&edid1);
 		if (r) {
-			printf("EDID: invalid EDID data\n");
+			if (verbose_mode)
+				printf("EDID: invalid EDID data\n");
 			r = -EINVAL;
 		}
 	}
@@ -1082,7 +1084,8 @@ void *video_hw_init(void)
 	struct ctfb_res_modes custom;
 	const char *options;
 #ifdef CONFIG_VIDEO_HDMI
-	int ret, hpd, hpd_delay, edid;
+	int hpd, hpd_delay, edid;
+	bool hdmi_present;
 #endif
 	int i, overscan_offset, overscan_x, overscan_y;
 	unsigned int fb_dma_addr;
@@ -1118,12 +1121,23 @@ void *video_hw_init(void)
 	if (sunxi_display.monitor == sunxi_monitor_dvi ||
 	    sunxi_display.monitor == sunxi_monitor_hdmi) {
 		/* Always call hdp_detect, as it also enables clocks, etc. */
-		ret = sunxi_hdmi_hpd_detect(hpd_delay);
+		hdmi_present = (sunxi_hdmi_hpd_detect(hpd_delay) == 1);
-		if (ret) {
+		if (hdmi_present && edid) {
 			printf("HDMI connected: ");
-			if (edid && sunxi_hdmi_edid_get_mode(&custom) == 0)
+			if (sunxi_hdmi_edid_get_mode(&custom, true) == 0)
 				mode = &custom;
-		} else if (hpd) {
+			else
+				hdmi_present = false;
+		}
+		/* Fall back to EDID in case HPD failed */
+		if (edid && !hdmi_present) {
+			if (sunxi_hdmi_edid_get_mode(&custom, false) == 0) {
+				mode = &custom;
+				hdmi_present = true;
+			}
+		}
+		/* Shut down when display was not found */
+		if ((hpd || edid) && !hdmi_present) {
 			sunxi_hdmi_shutdown();
 			sunxi_display.monitor = sunxi_get_default_mon(false);
 		} /* else continue with hdmi/dvi without a cable connected */

drivers/video/video_bmp.c

@@ -229,11 +229,12 @@ int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
 	}
 
 	/*
-	 * We support displaying 8bpp BMPs on 16bpp LCDs
+	 * We support displaying 8bpp and 24bpp BMPs on 16bpp LCDs
 	 * and displaying 24bpp BMPs on 32bpp LCDs
-	 * */
+	 */
 	if (bpix != bmp_bpix &&
 	    !(bmp_bpix == 8 && bpix == 16) &&
+	    !(bmp_bpix == 24 && bpix == 16) &&
 	    !(bmp_bpix == 24 && bpix == 32)) {
 		printf("Error: %d bit/pixel mode, but BMP has %d bit/pixel\n",
 		       bpix, get_unaligned_le16(&bmp->header.bit_count));
@@ -318,12 +319,22 @@ int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
 	case 24:
 		for (i = 0; i < height; ++i) {
 			for (j = 0; j < width; j++) {
-				*(fb++) = *(bmap++);
+				if (bpix == 16) {
-				*(fb++) = *(bmap++);
+					/* 16bit 555RGB format */
-				*(fb++) = *(bmap++);
+					*(u16 *)fb = ((bmap[2] >> 3) << 10) |
-				*(fb++) = 0;
+						((bmap[1] >> 3) << 5) |
+						(bmap[0] >> 3);
+					bmap += 3;
+					fb += 2;
+				} else {
+					*(fb++) = *(bmap++);
+					*(fb++) = *(bmap++);
+					*(fb++) = *(bmap++);
+					*(fb++) = 0;
+				}
 			}
 			fb -= priv->line_length + width * (bpix / 8);
+			bmap += (padded_width - width) * 3;
 		}
 		break;
 #endif /* CONFIG_BMP_24BPP */