Merge tag 'drm-misc-next-2024-06-13' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

drm-misc-next for 6.11:

UAPI Changes:

Cross-subsystem Changes:

Core Changes:
 - Sprinkle MODULE_DESCRIPTIONS everywhere they are missing
 - bridge: Remove drm_bridge_chain_mode_fixup
 - ci: Require a more recent version of mesa, improve farm estup and
   test generation
 - mipi-dbi: Remove mipi_dbi_machine_little_endian, make SPI bits per
   word configurable, support RGB888, and allow pixel formats to be
   specified in the DT.
 - mm: Remove drm_mm_replace_node
 - panic: Allow to dump kmsg to the screen
 - print: Add a drm prefix to warn level messages too, remove
   ___drm_dbg, consolidate prefix handling

Driver Changes:
 - sun4i: Rework the blender setup for DE2
 - bridges:
   - bridge-connector: Plumb in the new HDMI helpers
   - samsung-dsim: Fix timings calculation
   - tc358767: Plenty of small fixes
 - panels:
   - More cleanup of prepare / enable state tracking in drivers
   - New panel: PrimeView PM070WL4,

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240613-cicada-of-infinite-unity-0955ca@houat

1 files changed, 54 insertions, 1 deletions

diff --git a/drivers/gpu/drm/tiny/panel-mipi-dbi.c b/drivers/gpu/drm/tiny/panel-mipi-dbi.c
index b353a731f253..f753cdffe6f8 100644
--- a/drivers/gpu/drm/tiny/panel-mipi-dbi.c
+++ b/drivers/gpu/drm/tiny/panel-mipi-dbi.c
@@ -26,6 +26,49 @@
 
 #include <video/mipi_display.h>
 
+struct panel_mipi_dbi_format {
+	const char *name;
+	u32 fourcc;
+	unsigned int bpp;
+};
+
+static const struct panel_mipi_dbi_format panel_mipi_dbi_formats[] = {
+	{ "r5g6b5", DRM_FORMAT_RGB565, 16 },
+	{ "b6x2g6x2r6x2", DRM_FORMAT_RGB888, 24 },
+};
+
+static int panel_mipi_dbi_get_format(struct device *dev, u32 *formats, unsigned int *bpp)
+{
+	const char *format_name;
+	unsigned int i;
+	int ret;
+
+	formats[1] = DRM_FORMAT_XRGB8888;
+
+	ret = device_property_read_string(dev, "format", &format_name);
+	if (ret) {
+		/* Old Device Trees don't have this property */
+		formats[0] = DRM_FORMAT_RGB565;
+		*bpp = 16;
+		return 0;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(panel_mipi_dbi_formats); i++) {
+		const struct panel_mipi_dbi_format *format = &panel_mipi_dbi_formats[i];
+
+		if (strcmp(format_name, format->name))
+			continue;
+
+		formats[0] = format->fourcc;
+		*bpp = format->bpp;
+		return 0;
+	}
+
+	dev_err(dev, "Pixel format is not supported: '%s'\n", format_name);
+
+	return -EINVAL;
+}
+
 static const u8 panel_mipi_dbi_magic[15] = { 'M', 'I', 'P', 'I', ' ', 'D', 'B', 'I',
 					     0, 0, 0, 0, 0, 0, 0 };
 
@@ -276,6 +319,9 @@ static int panel_mipi_dbi_spi_probe(struct spi_device *spi)
 	struct drm_device *drm;
 	struct mipi_dbi *dbi;
 	struct gpio_desc *dc;
+	unsigned int bpp;
+	size_t buf_size;
+	u32 formats[2];
 	int ret;
 
 	dbidev = devm_drm_dev_alloc(dev, &panel_mipi_dbi_driver, struct mipi_dbi_dev, drm);
@@ -323,7 +369,14 @@ static int panel_mipi_dbi_spi_probe(struct spi_device *spi)
 	if (IS_ERR(dbidev->driver_private))
 		return PTR_ERR(dbidev->driver_private);
 
-	ret = mipi_dbi_dev_init(dbidev, &panel_mipi_dbi_pipe_funcs, &mode, 0);
+	ret = panel_mipi_dbi_get_format(dev, formats, &bpp);
+	if (ret)
+		return ret;
+
+	buf_size = DIV_ROUND_UP(mode.hdisplay * mode.vdisplay * bpp, 8);
+	ret = mipi_dbi_dev_init_with_formats(dbidev, &panel_mipi_dbi_pipe_funcs,
+					     formats, ARRAY_SIZE(formats),
+					     &mode, 0, buf_size);
 	if (ret)
 		return ret;