011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
79 lines
3.1 KiB
Diff
79 lines
3.1 KiB
Diff
From f63b6059c6129d81d3fc85b02d9b83b85023c437 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime.ripard@free-electrons.com>
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Date: Thu, 14 Jan 2016 16:24:56 +0100
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Subject: [PATCH] drm/fb_cma_helper: Remove implicit call to
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disable_unused_functions
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The drm_fbdev_cma_init function always calls the
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drm_helper_disable_unused_functions. Since it's part of the usual probe
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process, all the drivers using that helper will end up having their encoder
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and CRTC disable functions called at probe if their device has not been
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reported as enabled.
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This could be fixed by reading out from the registers the current state of
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the device if it is enabled, but even that will not handle the case where
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the device is actually disabled.
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Moreover, the drivers using the atomic modesetting expect that their enable
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and disable callback to be called when the device is already enabled or
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disabled (respectively).
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We can however fix this issue by moving the call to
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drm_helper_disable_unused_functions out of drm_fbdev_cma_init and make the
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drivers needing it (all the drivers calling drm_fbdev_cma_init and not
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using the atomic modesetting) explicitly call it.
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Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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Link: http://patchwork.freedesktop.org/patch/msgid/1452785109-6172-14-git-send-email-maxime.ripard@free-electrons.com
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Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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(cherry picked from commit 4314e19ef4ae0ba8872bd8610f6fef5e8743e236)
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---
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drivers/gpu/drm/drm_fb_cma_helper.c | 3 ---
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drivers/gpu/drm/imx/imx-drm-core.c | 1 +
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drivers/gpu/drm/sti/sti_drv.c | 1 +
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drivers/gpu/drm/tilcdc/tilcdc_drv.c | 1 +
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4 files changed, 3 insertions(+), 3 deletions(-)
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--- a/drivers/gpu/drm/drm_fb_cma_helper.c
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+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
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@@ -348,9 +348,6 @@ struct drm_fbdev_cma *drm_fbdev_cma_init
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}
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- /* disable all the possible outputs/crtcs before entering KMS mode */
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- drm_helper_disable_unused_functions(dev);
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-
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ret = drm_fb_helper_initial_config(helper, preferred_bpp);
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if (ret < 0) {
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dev_err(dev->dev, "Failed to set initial hw configuration.\n");
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--- a/drivers/gpu/drm/imx/imx-drm-core.c
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+++ b/drivers/gpu/drm/imx/imx-drm-core.c
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@@ -313,6 +313,7 @@ static int imx_drm_driver_load(struct dr
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dev_warn(drm->dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
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legacyfb_depth = 16;
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}
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+ drm_helper_disable_unused_functions(drm);
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imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth,
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drm->mode_config.num_crtc, MAX_CRTC);
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if (IS_ERR(imxdrm->fbhelper)) {
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--- a/drivers/gpu/drm/sti/sti_drv.c
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+++ b/drivers/gpu/drm/sti/sti_drv.c
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@@ -160,6 +160,7 @@ static int sti_load(struct drm_device *d
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drm_mode_config_reset(dev);
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+ drm_helper_disable_unused_functions(dev);
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drm_fbdev_cma_init(dev, 32,
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dev->mode_config.num_crtc,
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dev->mode_config.num_connector);
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--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
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+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
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@@ -294,6 +294,7 @@ static int tilcdc_load(struct drm_device
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break;
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}
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+ drm_helper_disable_unused_functions(dev);
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priv->fbdev = drm_fbdev_cma_init(dev, bpp,
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dev->mode_config.num_crtc,
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dev->mode_config.num_connector);
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