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7d7aa2fd92
This change makes the names of Broadcom targets consistent by using the common notation based on SoC/CPU ID (which is used internally anyway), bcmXXXX instead of brcmXXXX. This is even used for target TITLE in make menuconfig already, only the short target name used brcm so far. Despite, since subtargets range from bcm2708 to bcm2711, it seems appropriate to use bcm27xx instead of bcm2708 (again, as already done for BOARDNAME). This also renames the packages brcm2708-userland and brcm2708-gpu-fw. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
68 lines
2.3 KiB
Diff
68 lines
2.3 KiB
Diff
From dd99aa50a3ea7f7fe1ddfd59b1a2e969c744b8a0 Mon Sep 17 00:00:00 2001
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From: Jonathan Bell <jonathan@raspberrypi.org>
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Date: Tue, 28 May 2019 13:56:06 +0100
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Subject: [PATCH] drm: vc4: handle the case where there are no
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available displays
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It's reasonable for the firmware to return zero as the number of
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attached displays. Handle this case as otherwise drm thinks that
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the DSI panel is attached, which is nonsense.
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Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
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---
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drivers/gpu/drm/vc4/vc4_firmware_kms.c | 32 +++++++++++++++-----------
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1 file changed, 18 insertions(+), 14 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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@@ -1309,13 +1309,13 @@ static int vc4_fkms_bind(struct device *
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RPI_FIRMWARE_FRAMEBUFFER_GET_NUM_DISPLAYS,
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&num_displays, sizeof(u32));
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- /* If we fail to get the number of displays, or it returns 0, then
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+ /* If we fail to get the number of displays, then
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* assume old firmware that doesn't have the mailbox call, so just
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* set one display
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*/
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- if (ret || num_displays == 0) {
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+ if (ret) {
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num_displays = 1;
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- DRM_WARN("Unable to determine number of displays's. Assuming 1\n");
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+ DRM_WARN("Unable to determine number of displays - assuming 1\n");
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ret = 0;
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}
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@@ -1344,17 +1344,21 @@ static int vc4_fkms_bind(struct device *
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display_num);
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}
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- /* Map the SMI interrupt reg */
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- crtc_list[0]->regs = vc4_ioremap_regs(pdev, 0);
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- if (IS_ERR(crtc_list[0]->regs))
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- DRM_ERROR("Oh dear, failed to map registers\n");
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-
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- writel(0, crtc_list[0]->regs + SMICS);
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- ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
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- vc4_crtc_irq_handler, 0, "vc4 firmware kms",
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- crtc_list);
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- if (ret)
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- DRM_ERROR("Oh dear, failed to register IRQ\n");
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+ if (num_displays > 0) {
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+ /* Map the SMI interrupt reg */
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+ crtc_list[0]->regs = vc4_ioremap_regs(pdev, 0);
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+ if (IS_ERR(crtc_list[0]->regs))
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+ DRM_ERROR("Oh dear, failed to map registers\n");
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+
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+ writel(0, crtc_list[0]->regs + SMICS);
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+ ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
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+ vc4_crtc_irq_handler, 0,
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+ "vc4 firmware kms", crtc_list);
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+ if (ret)
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+ DRM_ERROR("Oh dear, failed to register IRQ\n");
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+ } else {
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+ DRM_WARN("No displays found. Consider forcing hotplug if HDMI is attached\n");
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+ }
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platform_set_drvdata(pdev, crtc_list);
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