Initial commit

target/linux/bcm27xx/patches-6.6/950-0757-drm-panel-add-panel-dsi.patch

@@ -0,0 +1,173 @@
+From fe0165c07de6a5c31d9c2be88ec6642d8ac98872 Mon Sep 17 00:00:00 2001
+From: Timon Skerutsch <kernel@diodes-delight.com>
+Date: Mon, 13 Nov 2023 22:53:12 +0100
+Subject: [PATCH 0757/1085] drm/panel: add panel-dsi
+
+Equivalent to panel-dpi for configuring a simple DSI panel with
+device tree side timings and bus settings.
+Motiviation is the same as for panel-dpi of wanting to support
+new simple panels without needing to patch the kernel.
+
+Signed-off-by: Timon Skerutsch <kernel@diodes-delight.com>
+---
+ drivers/gpu/drm/panel/panel-simple.c | 121 +++++++++++++++++++++++++++
+ 1 file changed, 121 insertions(+)
+
+--- a/drivers/gpu/drm/panel/panel-simple.c
++++ b/drivers/gpu/drm/panel/panel-simple.c
+@@ -40,6 +40,7 @@
+ #include <drm/drm_edid.h>
+ #include <drm/drm_mipi_dsi.h>
+ #include <drm/drm_panel.h>
++#include <drm/drm_of.h>
+ 
+ /**
+  * struct panel_desc - Describes a simple panel.
+@@ -4903,6 +4904,9 @@ static const struct panel_desc_dsi osd10
+ 	.lanes = 4,
+ };
+ 
++// for panels using generic panel-dsi binding
++static struct panel_desc_dsi panel_dsi;
++
+ static const struct of_device_id dsi_of_match[] = {
+ 	{
+ 		.compatible = "auo,b080uan01",
+@@ -4926,20 +4930,137 @@ static const struct of_device_id dsi_of_
+ 		.compatible = "osddisplays,osd101t2045-53ts",
+ 		.data = &osd101t2045_53ts
+ 	}, {
++		/* Must be the last entry */
++		.compatible = "panel-dsi",
++		.data = &panel_dsi,
++	}, {
+ 		/* sentinel */
+ 	}
+ };
+ MODULE_DEVICE_TABLE(of, dsi_of_match);
+ 
++
++/* Checks for DSI panel definition in device-tree, analog to panel_dpi */
++static int panel_dsi_dt_probe(struct device *dev,
++			  struct panel_desc_dsi *desc_dsi)
++{
++	struct panel_desc *desc;
++	struct display_timing *timing;
++	const struct device_node *np;
++	const char *dsi_color_format;
++	const char *dsi_mode_flags;
++	struct property *prop;
++	int dsi_lanes, ret;
++
++	np = dev->of_node;
++
++	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
++	if (!desc)
++		return -ENOMEM;
++
++	timing = devm_kzalloc(dev, sizeof(*timing), GFP_KERNEL);
++	if (!timing)
++		return -ENOMEM;
++
++	ret = of_get_display_timing(np, "panel-timing", timing);
++	if (ret < 0) {
++		dev_err(dev, "%pOF: no panel-timing node found for \"panel-dsi\" binding\n",
++			np);
++		return ret;
++	}
++
++	desc->timings = timing;
++	desc->num_timings = 1;
++
++	of_property_read_u32(np, "width-mm", &desc->size.width);
++	of_property_read_u32(np, "height-mm", &desc->size.height);
++
++	dsi_lanes = drm_of_get_data_lanes_count_ep(np, 0, 0, 1, 4);
++
++	if (dsi_lanes < 0) {
++		dev_err(dev, "%pOF: no or too many data-lanes defined", np);
++		return dsi_lanes;
++	}
++
++	desc_dsi->lanes = dsi_lanes;
++
++	of_property_read_string(np, "dsi-color-format", &dsi_color_format);
++	if (!strcmp(dsi_color_format, "RGB888")) {
++		desc_dsi->format = MIPI_DSI_FMT_RGB888;
++		desc->bpc = 8;
++	} else if (!strcmp(dsi_color_format, "RGB565")) {
++		desc_dsi->format = MIPI_DSI_FMT_RGB565;
++		desc->bpc = 6;
++	} else if (!strcmp(dsi_color_format, "RGB666")) {
++		desc_dsi->format = MIPI_DSI_FMT_RGB666;
++		desc->bpc = 6;
++	} else if (!strcmp(dsi_color_format, "RGB666_PACKED")) {
++		desc_dsi->format = MIPI_DSI_FMT_RGB666_PACKED;
++		desc->bpc = 6;
++	} else {
++		dev_err(dev, "%pOF: no valid dsi-color-format defined", np);
++		return -EINVAL;
++	}
++
++
++	of_property_for_each_string(np, "mode", prop, dsi_mode_flags) {
++		if (!strcmp(dsi_mode_flags, "MODE_VIDEO"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VIDEO;
++		else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_BURST"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_BURST;
++		else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_SYNC_PULSE"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
++		else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_AUTO_VERT"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_AUTO_VERT;
++		else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_HSE"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_HSE;
++		else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_NO_HFP"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_NO_HFP;
++		else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_NO_HBP"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_NO_HBP;
++		else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_NO_HSA"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_NO_HSA;
++		else if (!strcmp(dsi_mode_flags, "MODE_VSYNC_FLUSH"))
++			desc_dsi->flags |= MIPI_DSI_MODE_VSYNC_FLUSH;
++		else if (!strcmp(dsi_mode_flags, "MODE_NO_EOT_PACKET"))
++			desc_dsi->flags |= MIPI_DSI_MODE_NO_EOT_PACKET;
++		else if (!strcmp(dsi_mode_flags, "CLOCK_NON_CONTINUOUS"))
++			desc_dsi->flags |= MIPI_DSI_CLOCK_NON_CONTINUOUS;
++		else if (!strcmp(dsi_mode_flags, "MODE_LPM"))
++			desc_dsi->flags |= MIPI_DSI_MODE_LPM;
++		else if (!strcmp(dsi_mode_flags, "HS_PKT_END_ALIGNED"))
++			desc_dsi->flags |= MIPI_DSI_HS_PKT_END_ALIGNED;
++	}
++
++	desc->connector_type = DRM_MODE_CONNECTOR_DSI;
++	desc_dsi->desc = *desc;
++
++	return 0;
++}
++
+ static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
+ {
+ 	const struct panel_desc_dsi *desc;
++	struct panel_desc_dsi *dt_desc;
+ 	int err;
+ 
+ 	desc = of_device_get_match_data(&dsi->dev);
+ 	if (!desc)
+ 		return -ENODEV;
+ 
++	if (desc == &panel_dsi) {
++		/* Handle the generic panel-dsi binding */
++		dt_desc = devm_kzalloc(&dsi->dev, sizeof(*dt_desc), GFP_KERNEL);
++		if (!dt_desc)
++			return -ENOMEM;
++
++		err = panel_dsi_dt_probe(&dsi->dev, dt_desc);
++		if (err < 0)
++			return err;
++
++		desc = dt_desc;
++	}
++
+ 	err = panel_simple_probe(&dsi->dev, &desc->desc);
+ 	if (err < 0)
+ 		return err;