177 lines
5.4 KiB
Diff
177 lines
5.4 KiB
Diff
From 0a0084b8621682ad96d001e798aa239b11a3cf00 Mon Sep 17 00:00:00 2001
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From: Timon Skerutsch <kernel@diodes-delight.com>
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Date: Mon, 13 Nov 2023 22:53:12 +0100
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Subject: [PATCH] drm/panel: add panel-dsi
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Equivalent to panel-dpi for configuring a simple DSI panel with
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device tree side timings and bus settings.
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Motiviation is the same as for panel-dpi of wanting to support
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new simple panels without needing to patch the kernel.
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Signed-off-by: Timon Skerutsch <kernel@diodes-delight.com>
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---
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drivers/gpu/drm/panel/panel-simple.c | 123 ++++++++++++++++++++++++++-
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1 file changed, 122 insertions(+), 1 deletion(-)
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--- a/drivers/gpu/drm/panel/panel-simple.c
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+++ b/drivers/gpu/drm/panel/panel-simple.c
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@@ -40,6 +40,7 @@
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#include <drm/drm_edid.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_panel.h>
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+#include <drm/drm_of.h>
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/**
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* struct panel_desc - Describes a simple panel.
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@@ -4662,6 +4663,9 @@ static const struct panel_desc_dsi osd10
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.lanes = 4,
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};
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+// for panels using generic panel-dsi binding
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+static struct panel_desc_dsi panel_dsi;
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+
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static const struct of_device_id dsi_of_match[] = {
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{
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.compatible = "auo,b080uan01",
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@@ -4685,14 +4689,118 @@ static const struct of_device_id dsi_of_
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.compatible = "osddisplays,osd101t2045-53ts",
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.data = &osd101t2045_53ts
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}, {
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+ /* Must be the last entry */
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+ .compatible = "panel-dsi",
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+ .data = &panel_dsi,
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+ }, {
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(of, dsi_of_match);
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+
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+/* Checks for DSI panel definition in device-tree, analog to panel_dpi */
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+static int panel_dsi_dt_probe(struct device *dev,
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+ struct panel_desc_dsi *desc_dsi)
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+{
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+ struct panel_desc *desc;
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+ struct display_timing *timing;
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+ const struct device_node *np;
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+ const char *dsi_color_format;
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+ const char *dsi_mode_flags;
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+ struct property *prop;
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+ int dsi_lanes, ret;
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+
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+ np = dev->of_node;
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+
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+ desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
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+ if (!desc)
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+ return -ENOMEM;
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+
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+ timing = devm_kzalloc(dev, sizeof(*timing), GFP_KERNEL);
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+ if (!timing)
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+ return -ENOMEM;
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+
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+ ret = of_get_display_timing(np, "panel-timing", timing);
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+ if (ret < 0) {
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+ dev_err(dev, "%pOF: no panel-timing node found for \"panel-dsi\" binding\n",
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+ np);
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+ return ret;
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+ }
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+
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+ desc->timings = timing;
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+ desc->num_timings = 1;
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+
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+ of_property_read_u32(np, "width-mm", &desc->size.width);
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+ of_property_read_u32(np, "height-mm", &desc->size.height);
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+
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+ dsi_lanes = drm_of_get_data_lanes_count_ep(np, 0, 0, 1, 4);
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+
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+ if (dsi_lanes < 0) {
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+ dev_err(dev, "%pOF: no or too many data-lanes defined", np);
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+ return dsi_lanes;
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+ }
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+
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+ desc_dsi->lanes = dsi_lanes;
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+
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+ of_property_read_string(np, "dsi-color-format", &dsi_color_format);
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+ if (!strcmp(dsi_color_format, "RGB888")) {
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+ desc_dsi->format = MIPI_DSI_FMT_RGB888;
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+ desc->bpc = 8;
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+ } else if (!strcmp(dsi_color_format, "RGB565")) {
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+ desc_dsi->format = MIPI_DSI_FMT_RGB565;
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+ desc->bpc = 6;
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+ } else if (!strcmp(dsi_color_format, "RGB666")) {
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+ desc_dsi->format = MIPI_DSI_FMT_RGB666;
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+ desc->bpc = 6;
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+ } else if (!strcmp(dsi_color_format, "RGB666_PACKED")) {
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+ desc_dsi->format = MIPI_DSI_FMT_RGB666_PACKED;
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+ desc->bpc = 6;
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+ } else {
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+ dev_err(dev, "%pOF: no valid dsi-color-format defined", np);
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+ return -EINVAL;
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+ }
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+
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+
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+ of_property_for_each_string(np, "mode", prop, dsi_mode_flags) {
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+ if (!strcmp(dsi_mode_flags, "MODE_VIDEO"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VIDEO;
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+ else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_BURST"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_BURST;
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+ else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_SYNC_PULSE"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
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+ else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_AUTO_VERT"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_AUTO_VERT;
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+ else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_HSE"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_HSE;
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+ else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_NO_HFP"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_NO_HFP;
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+ else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_NO_HBP"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_NO_HBP;
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+ else if (!strcmp(dsi_mode_flags, "MODE_VIDEO_NO_HSA"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VIDEO_NO_HSA;
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+ else if (!strcmp(dsi_mode_flags, "MODE_VSYNC_FLUSH"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_VSYNC_FLUSH;
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+ else if (!strcmp(dsi_mode_flags, "MODE_NO_EOT_PACKET"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_NO_EOT_PACKET;
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+ else if (!strcmp(dsi_mode_flags, "CLOCK_NON_CONTINUOUS"))
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+ desc_dsi->flags |= MIPI_DSI_CLOCK_NON_CONTINUOUS;
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+ else if (!strcmp(dsi_mode_flags, "MODE_LPM"))
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+ desc_dsi->flags |= MIPI_DSI_MODE_LPM;
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+ else if (!strcmp(dsi_mode_flags, "HS_PKT_END_ALIGNED"))
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+ desc_dsi->flags |= MIPI_DSI_HS_PKT_END_ALIGNED;
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+ }
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+
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+ desc->connector_type = DRM_MODE_CONNECTOR_DSI;
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+ desc_dsi->desc = *desc;
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+
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+ return 0;
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+}
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+
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static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
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{
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const struct panel_desc_dsi *desc;
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+ struct panel_desc_dsi *dt_desc;
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const struct of_device_id *id;
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int err;
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@@ -4700,7 +4808,20 @@ static int panel_simple_dsi_probe(struct
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if (!id)
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return -ENODEV;
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- desc = id->data;
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+ if (id->data == &panel_dsi) {
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+ /* Handle the generic panel-dsi binding */
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+ dt_desc = devm_kzalloc(&dsi->dev, sizeof(*dt_desc), GFP_KERNEL);
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+ if (!dt_desc)
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+ return -ENOMEM;
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+
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+ err = panel_dsi_dt_probe(&dsi->dev, dt_desc);
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+ if (err < 0)
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+ return err;
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+
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+ desc = dt_desc;
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+ } else {
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+ desc = id->data;
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+ }
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err = panel_simple_probe(&dsi->dev, &desc->desc);
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if (err < 0)
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