diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0540-drm-vc4-Probe-DPI-DSI-timings-from-the-firmware.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0540-drm-vc4-Probe-DPI-DSI-timings-from-the-firmware.patch | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0540-drm-vc4-Probe-DPI-DSI-timings-from-the-firmware.patch b/target/linux/brcm2708/patches-4.19/950-0540-drm-vc4-Probe-DPI-DSI-timings-from-the-firmware.patch new file mode 100644 index 0000000000..1a27777ac7 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0540-drm-vc4-Probe-DPI-DSI-timings-from-the-firmware.patch @@ -0,0 +1,120 @@ +From b4ffa49d762a4af832d0d8660caf59722c0ff75a Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.org> +Date: Tue, 21 May 2019 11:50:00 +0100 +Subject: [PATCH] drm: vc4: Probe DPI/DSI timings from the firmware + +For DPI and DSI displays query the firmware as to the configuration +and add it as the only mode for DRM. + +In theory we can add plumbing for setting the DPI/DSI mode from +KMS, but this is not being added at present as the support frameworks +aren't present in the firmware. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> +--- + drivers/gpu/drm/vc4/vc4_firmware_kms.c | 60 ++++++++++++++++++---- + include/soc/bcm2835/raspberrypi-firmware.h | 1 + + 2 files changed, 51 insertions(+), 10 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c ++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c +@@ -280,7 +280,7 @@ static u32 vc4_get_display_type(u32 disp + /* The firmware display (DispmanX) IDs map to specific types in + * a fixed manner. + */ +- DRM_MODE_ENCODER_DSI, /* MAIN_LCD */ ++ DRM_MODE_ENCODER_DSI, /* MAIN_LCD - DSI or DPI */ + DRM_MODE_ENCODER_DSI, /* AUX_LCD */ + DRM_MODE_ENCODER_TMDS, /* HDMI0 */ + DRM_MODE_ENCODER_TVDAC, /* VEC */ +@@ -362,7 +362,6 @@ static void vc4_plane_atomic_update(stru + vc4_get_vc_image_fmt(drm_fmt->format); + struct vc4_fkms_plane *vc4_plane = to_vc4_fkms_plane(plane); + struct mailbox_set_plane *mb = &vc4_plane->mb; +- struct vc4_crtc *vc4_crtc = to_vc4_crtc(state->crtc); + int num_planes = fb->format->num_planes; + struct drm_display_mode *mode = &state->crtc->mode; + unsigned int rotation = SUPPORTED_ROTATIONS; +@@ -997,7 +996,9 @@ static int vc4_fkms_connector_get_modes( + return ret; + } + +-/* FIXME: Read LCD mode from the firmware. This is the DSI panel resolution. */ ++/* This is the DSI panel resolution. Use this as a default should the firmware ++ * not respond to our request for the timings. ++ */ + static const struct drm_display_mode lcd_mode = { + DRM_MODE("800x480", DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, + 25979400 / 1000, +@@ -1008,15 +1009,54 @@ static const struct drm_display_mode lcd + + static int vc4_fkms_lcd_connector_get_modes(struct drm_connector *connector) + { +- //struct vc4_fkms_connector *fkms_connector = +- // to_vc4_fkms_connector(connector); +- //struct drm_encoder *encoder = fkms_connector->encoder; +- //struct vc4_fkms_encoder *vc4_encoder = to_vc4_fkms_encoder(encoder); ++ struct vc4_fkms_connector *fkms_connector = ++ to_vc4_fkms_connector(connector); ++ struct vc4_dev *vc4 = fkms_connector->vc4_dev; + struct drm_display_mode *mode; +- //int ret = 0; ++ struct mailbox_set_mode mb = { ++ .tag1 = { RPI_FIRMWARE_GET_DISPLAY_TIMING, ++ sizeof(struct set_timings), 0}, ++ .timings = { .display = fkms_connector->display_number }, ++ }; ++ struct drm_display_mode fw_mode; ++ int ret = 0; ++ ++ ret = rpi_firmware_property_list(vc4->firmware, &mb, sizeof(mb)); ++ if (!ret) { ++ /* Equivalent to DRM_MODE macro. */ ++ memset(&fw_mode, 0, sizeof(fw_mode)); ++ strncpy(fw_mode.name, "LCD_MODE", sizeof(fw_mode.name)); ++ fw_mode.status = 0; ++ fw_mode.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; ++ fw_mode.clock = mb.timings.clock; ++ fw_mode.hdisplay = mb.timings.hdisplay; ++ fw_mode.hsync_start = mb.timings.hsync_start; ++ fw_mode.hsync_end = mb.timings.hsync_end; ++ fw_mode.htotal = mb.timings.htotal; ++ fw_mode.hskew = 0; ++ fw_mode.vdisplay = mb.timings.vdisplay; ++ fw_mode.vsync_start = mb.timings.vsync_start; ++ fw_mode.vsync_end = mb.timings.vsync_end; ++ fw_mode.vtotal = mb.timings.vtotal; ++ fw_mode.vscan = mb.timings.vscan; ++ if (mb.timings.flags & TIMINGS_FLAGS_H_SYNC_POS) ++ fw_mode.flags |= DRM_MODE_FLAG_PHSYNC; ++ else ++ fw_mode.flags |= DRM_MODE_FLAG_NHSYNC; ++ if (mb.timings.flags & TIMINGS_FLAGS_V_SYNC_POS) ++ fw_mode.flags |= DRM_MODE_FLAG_PVSYNC; ++ else ++ fw_mode.flags |= DRM_MODE_FLAG_NVSYNC; ++ ++ fw_mode.base.type = DRM_MODE_OBJECT_MODE; ++ ++ mode = drm_mode_duplicate(connector->dev, ++ &fw_mode); ++ } else { ++ mode = drm_mode_duplicate(connector->dev, ++ &lcd_mode); ++ } + +- mode = drm_mode_duplicate(connector->dev, +- &lcd_mode); + if (!mode) { + DRM_ERROR("Failed to create a new display mode\n"); + return -ENOMEM; +--- a/include/soc/bcm2835/raspberrypi-firmware.h ++++ b/include/soc/bcm2835/raspberrypi-firmware.h +@@ -151,6 +151,7 @@ enum rpi_firmware_property_tag { + RPI_FIRMWARE_VCHIQ_INIT = 0x00048010, + + RPI_FIRMWARE_SET_PLANE = 0x00048015, ++ RPI_FIRMWARE_GET_DISPLAY_TIMING = 0x00040017, + RPI_FIRMWARE_SET_TIMING = 0x00048017, + + RPI_FIRMWARE_GET_COMMAND_LINE = 0x00050001, |