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139 lines
5.2 KiB
Diff
139 lines
5.2 KiB
Diff
From e8f126acd6da4f7d2e0df3c735fccf9971d95254 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Tue, 21 May 2019 11:50:00 +0100
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Subject: [PATCH] drm: vc4: Probe DPI/DSI timings from the firmware
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For DPI and DSI displays query the firmware as to the configuration
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and add it as the only mode for DRM.
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In theory we can add plumbing for setting the DPI/DSI mode from
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KMS, but this is not being added at present as the support frameworks
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aren't present in the firmware.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/gpu/drm/vc4/vc4_firmware_kms.c | 64 ++++++++++++++++------
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include/soc/bcm2835/raspberrypi-firmware.h | 1 +
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2 files changed, 49 insertions(+), 16 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
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+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
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@@ -248,7 +248,6 @@ static inline struct vc4_crtc *to_vc4_cr
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struct vc4_fkms_encoder {
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struct drm_encoder base;
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bool hdmi_monitor;
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- bool rgb_range_selectable;
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};
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static inline struct vc4_fkms_encoder *
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@@ -283,7 +282,7 @@ static u32 vc4_get_display_type(u32 disp
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/* The firmware display (DispmanX) IDs map to specific types in
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* a fixed manner.
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*/
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- DRM_MODE_ENCODER_DSI, /* MAIN_LCD */
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+ DRM_MODE_ENCODER_DSI, /* MAIN_LCD - DSI or DPI */
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DRM_MODE_ENCODER_DSI, /* AUX_LCD */
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DRM_MODE_ENCODER_TMDS, /* HDMI0 */
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DRM_MODE_ENCODER_TVDAC, /* VEC */
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@@ -365,7 +364,6 @@ static void vc4_plane_atomic_update(stru
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vc4_get_vc_image_fmt(drm_fmt->format);
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struct vc4_fkms_plane *vc4_plane = to_vc4_fkms_plane(plane);
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struct mailbox_set_plane *mb = &vc4_plane->mb;
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- struct vc4_crtc *vc4_crtc = to_vc4_crtc(state->crtc);
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int num_planes = fb->format->num_planes;
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struct drm_display_mode *mode = &state->crtc->mode;
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unsigned int rotation = SUPPORTED_ROTATIONS;
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@@ -987,11 +985,6 @@ static int vc4_fkms_connector_get_modes(
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vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid);
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- if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
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- vc4_encoder->rgb_range_selectable =
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- drm_rgb_quant_range_selectable(edid);
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- }
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-
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drm_connector_update_edid_property(connector, edid);
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ret = drm_add_edid_modes(connector, edid);
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kfree(edid);
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@@ -999,7 +992,9 @@ static int vc4_fkms_connector_get_modes(
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return ret;
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}
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-/* FIXME: Read LCD mode from the firmware. This is the DSI panel resolution. */
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+/* This is the DSI panel resolution. Use this as a default should the firmware
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+ * not respond to our request for the timings.
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+ */
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static const struct drm_display_mode lcd_mode = {
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DRM_MODE("800x480", DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
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25979400 / 1000,
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@@ -1010,15 +1005,52 @@ static const struct drm_display_mode lcd
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static int vc4_fkms_lcd_connector_get_modes(struct drm_connector *connector)
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{
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- //struct vc4_fkms_connector *fkms_connector =
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- // to_vc4_fkms_connector(connector);
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- //struct drm_encoder *encoder = fkms_connector->encoder;
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- //struct vc4_fkms_encoder *vc4_encoder = to_vc4_fkms_encoder(encoder);
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+ struct vc4_fkms_connector *fkms_connector =
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+ to_vc4_fkms_connector(connector);
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+ struct vc4_dev *vc4 = fkms_connector->vc4_dev;
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struct drm_display_mode *mode;
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- //int ret = 0;
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+ struct mailbox_set_mode mb = {
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+ .tag1 = { RPI_FIRMWARE_GET_DISPLAY_TIMING,
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+ sizeof(struct set_timings), 0},
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+ .timings = { .display = fkms_connector->display_number },
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+ };
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+ struct drm_display_mode fw_mode;
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+ int ret = 0;
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+
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+ ret = rpi_firmware_property_list(vc4->firmware, &mb, sizeof(mb));
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+ if (!ret) {
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+ /* Equivalent to DRM_MODE macro. */
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+ memset(&fw_mode, 0, sizeof(fw_mode));
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+ strncpy(fw_mode.name, "LCD_MODE", sizeof(fw_mode.name));
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+ fw_mode.status = 0;
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+ fw_mode.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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+ fw_mode.clock = mb.timings.clock;
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+ fw_mode.hdisplay = mb.timings.hdisplay;
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+ fw_mode.hsync_start = mb.timings.hsync_start;
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+ fw_mode.hsync_end = mb.timings.hsync_end;
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+ fw_mode.htotal = mb.timings.htotal;
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+ fw_mode.hskew = 0;
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+ fw_mode.vdisplay = mb.timings.vdisplay;
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+ fw_mode.vsync_start = mb.timings.vsync_start;
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+ fw_mode.vsync_end = mb.timings.vsync_end;
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+ fw_mode.vtotal = mb.timings.vtotal;
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+ fw_mode.vscan = mb.timings.vscan;
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+ if (mb.timings.flags & TIMINGS_FLAGS_H_SYNC_POS)
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+ fw_mode.flags |= DRM_MODE_FLAG_PHSYNC;
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+ else
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+ fw_mode.flags |= DRM_MODE_FLAG_NHSYNC;
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+ if (mb.timings.flags & TIMINGS_FLAGS_V_SYNC_POS)
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+ fw_mode.flags |= DRM_MODE_FLAG_PVSYNC;
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+ else
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+ fw_mode.flags |= DRM_MODE_FLAG_NVSYNC;
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+
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+ mode = drm_mode_duplicate(connector->dev,
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+ &fw_mode);
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+ } else {
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+ mode = drm_mode_duplicate(connector->dev,
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+ &lcd_mode);
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+ }
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- mode = drm_mode_duplicate(connector->dev,
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- &lcd_mode);
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if (!mode) {
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DRM_ERROR("Failed to create a new display mode\n");
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return -ENOMEM;
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--- a/include/soc/bcm2835/raspberrypi-firmware.h
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+++ b/include/soc/bcm2835/raspberrypi-firmware.h
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@@ -150,6 +150,7 @@ enum rpi_firmware_property_tag {
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RPI_FIRMWARE_VCHIQ_INIT = 0x00048010,
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RPI_FIRMWARE_SET_PLANE = 0x00048015,
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+ RPI_FIRMWARE_GET_DISPLAY_TIMING = 0x00040017,
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RPI_FIRMWARE_SET_TIMING = 0x00048017,
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RPI_FIRMWARE_GET_COMMAND_LINE = 0x00050001,
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