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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0524-drm-vc4-Query-the-display-ID-for-each-display-in-FKM.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0524-drm-vc4-Query-the-display-ID-for-each-display-in-FKM.patch58
1 files changed, 58 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0524-drm-vc4-Query-the-display-ID-for-each-display-in-FKM.patch b/target/linux/brcm2708/patches-4.19/950-0524-drm-vc4-Query-the-display-ID-for-each-display-in-FKM.patch
new file mode 100644
index 0000000000..1c349449c5
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0524-drm-vc4-Query-the-display-ID-for-each-display-in-FKM.patch
@@ -0,0 +1,58 @@
+From 13723c680a129d79a7872ee131c0201374ba62ce Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Tue, 9 Apr 2019 12:37:28 +0100
+Subject: [PATCH] drm: vc4: Query the display ID for each display in
+ FKMS
+
+Replace the hard coded list of display IDs for a mailbox call
+that returns the display ID for each display that has been
+detected.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 16 +++++++++++++---
+ include/soc/bcm2835/raspberrypi-firmware.h | 1 +
+ 2 files changed, 14 insertions(+), 3 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -943,7 +943,7 @@ static int vc4_fkms_bind(struct device *
+ struct vc4_crtc **crtc_list;
+ u32 num_displays, display_num;
+ int ret;
+- const u32 display_num_lookup[] = {2, 7, 1};
++ u32 display_id;
+
+ vc4->firmware_kms = true;
+
+@@ -982,8 +982,18 @@ static int vc4_fkms_bind(struct device *
+ return -ENOMEM;
+
+ for (display_num = 0; display_num < num_displays; display_num++) {
+- ret = vc4_fkms_create_screen(dev, drm, display_num,
+- display_num_lookup[display_num],
++ display_id = display_num;
++ ret = rpi_firmware_property(vc4->firmware,
++ RPI_FIRMWARE_FRAMEBUFFER_GET_DISPLAY_ID,
++ &display_id, sizeof(display_id));
++ /* FIXME: Determine the correct error handling here.
++ * Should we fail to create the one "screen" but keep the
++ * others, or fail the whole thing?
++ */
++ if (ret)
++ DRM_ERROR("Failed to get display id %u\n", display_num);
++
++ ret = vc4_fkms_create_screen(dev, drm, display_num, display_id,
+ &crtc_list[display_num]);
+ if (ret)
+ DRM_ERROR("Oh dear, failed to create display %u\n",
+--- a/include/soc/bcm2835/raspberrypi-firmware.h
++++ b/include/soc/bcm2835/raspberrypi-firmware.h
+@@ -117,6 +117,7 @@ enum rpi_firmware_property_tag {
+ RPI_FIRMWARE_FRAMEBUFFER_GET_TOUCHBUF = 0x0004000f,
+ RPI_FIRMWARE_FRAMEBUFFER_GET_GPIOVIRTBUF = 0x00040010,
+ RPI_FIRMWARE_FRAMEBUFFER_RELEASE = 0x00048001,
++ RPI_FIRMWARE_FRAMEBUFFER_GET_DISPLAY_ID = 0x00040016,
+ RPI_FIRMWARE_FRAMEBUFFER_SET_DISPLAY_NUM = 0x00048013,
+ RPI_FIRMWARE_FRAMEBUFFER_GET_NUM_DISPLAYS = 0x00040013,
+ RPI_FIRMWARE_FRAMEBUFFER_GET_DISPLAY_SETTINGS = 0x00040014,