142 lines
3.8 KiB
Diff
142 lines
3.8 KiB
Diff
From 812bbaae4bf8077a3ff3981c1b507c4b1d5f9afb Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megi@xff.cz>
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Date: Wed, 19 Oct 2022 02:54:20 +0200
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Subject: [PATCH 303/389] drm: panel: hx8394: Add mode/init sequence update via
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firmware load
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This is useful for trying various modes/init sequences quickly from
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userspace.
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Signed-off-by: Ondrej Jirman <megi@xff.cz>
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---
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drivers/gpu/drm/panel/panel-himax-hx8394.c | 78 +++++++++++++++++++++-
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1 file changed, 77 insertions(+), 1 deletion(-)
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diff --git a/drivers/gpu/drm/panel/panel-himax-hx8394.c b/drivers/gpu/drm/panel/panel-himax-hx8394.c
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index fc04e50dd242..f99dbe012c3a 100644
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--- a/drivers/gpu/drm/panel/panel-himax-hx8394.c
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+++ b/drivers/gpu/drm/panel/panel-himax-hx8394.c
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@@ -13,6 +13,7 @@
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#include <linux/media-bus-format.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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+#include <linux/firmware.h>
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#include <linux/of_device.h>
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#include <linux/regulator/consumer.h>
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@@ -35,6 +36,9 @@ struct hx8394 {
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struct dentry *debugfs;
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const struct hx8394_panel_desc *desc;
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+
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+ u8* init_seq;
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+ int init_seq_size;
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};
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struct hx8394_panel_desc {
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@@ -70,6 +74,21 @@ static inline struct hx8394 *panel_to_hx8394(struct drm_panel *panel)
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static int hsd060bhw4_init_sequence(struct hx8394 *ctx)
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{
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struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
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+ u8* s = ctx->init_seq;
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+ u8* e = ctx->init_seq + ctx->init_seq_size;
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+ int ret;
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+
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+ if (s) {
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+ while (s < e) {
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+ ret = mipi_dsi_dcs_write(dsi, s[0], s + 2, s[1]);
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+ if (ret < 0)
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+ return ret;
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+
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+ s += s[1] + 2;
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+ }
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+
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+ return 0;
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+ }
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dsi_dcs_write_seq(dsi, 0xb9, 0xff, 0x83, 0x94);
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dsi_dcs_write_seq(dsi, 0xb1, 0x48, 0x11, 0x71, 0x09, 0x32, 0x24, 0x71, 0x31, 0x55, 0x30);
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@@ -92,7 +111,7 @@ static int hsd060bhw4_init_sequence(struct hx8394 *ctx)
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return 0;
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}
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-static const struct drm_display_mode hsd060bhw4_mode = {
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+static struct drm_display_mode hsd060bhw4_mode = {
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.hdisplay = 720,
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.hsync_start = 720 + 40,
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.hsync_end = 720 + 40 + 46,
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@@ -302,6 +321,61 @@ static void hx8394_debugfs_remove(struct hx8394 *ctx)
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ctx->debugfs = NULL;
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}
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+struct drm_display_mode_head {
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+ int clock; /* in kHz */
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+ u16 hdisplay;
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+ u16 hsync_start;
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+ u16 hsync_end;
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+ u16 htotal;
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+ u16 hskew;
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+ u16 vdisplay;
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+ u16 vsync_start;
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+ u16 vsync_end;
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+ u16 vtotal;
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+ u16 vscan;
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+};
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+
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+static void hx8394_load_mode(struct hx8394 *ctx)
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+{
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+ const char* fw_name = "hx8394-mode.bin";
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+ const struct firmware *fw;
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+ struct drm_display_mode_head h;
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+ int ret;
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+
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+ ret = request_firmware(&fw, fw_name, ctx->dev);
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+ if (ret < 0)
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+ return;
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+
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+ if (fw->size < sizeof(h))
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+ goto out_free;
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+
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+ memcpy(&h, fw->data, sizeof(h));
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+
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+ hsd060bhw4_mode.hdisplay = h.hdisplay;
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+ hsd060bhw4_mode.hsync_start = h.hsync_start;
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+ hsd060bhw4_mode.hsync_end = h.hsync_end;
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+ hsd060bhw4_mode.htotal = h.htotal;
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+ hsd060bhw4_mode.vdisplay = h.vdisplay;
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+ hsd060bhw4_mode.vsync_start = h.vsync_start;
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+ hsd060bhw4_mode.vsync_end = h.vsync_end;
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+ hsd060bhw4_mode.vtotal = h.vtotal;
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+ hsd060bhw4_mode.clock = h.clock;
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+ //hsd060bhw4_mode.flags = h.flags;
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+
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+ if (fw->size <= sizeof(h))
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+ goto out_free;
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+
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+ ctx->init_seq_size = fw->size - sizeof(h);
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+ ctx->init_seq = devm_kzalloc(ctx->dev, ctx->init_seq_size, GFP_KERNEL);
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+ if (ctx->init_seq == NULL)
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+ goto out_free;
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+
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+ memcpy(ctx->init_seq, fw->data + sizeof(h), ctx->init_seq_size);
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+
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+out_free:
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+ release_firmware(fw);
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+}
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+
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static int hx8394_probe(struct mipi_dsi_device *dsi)
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{
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struct device *dev = &dsi->dev;
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@@ -322,6 +396,8 @@ static int hx8394_probe(struct mipi_dsi_device *dsi)
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ctx->dev = dev;
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ctx->desc = of_device_get_match_data(dev);
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+ hx8394_load_mode(ctx);
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+
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dsi->mode_flags = ctx->desc->mode_flags;
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dsi->format = ctx->desc->format;
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dsi->lanes = ctx->desc->lanes;
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--
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2.35.3
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