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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2021-11-10 13:37:01 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2021-11-11 14:06:58 +0300 |
| commit | 9239f3e1807c282e3c6bced510640910e9b25c60 (patch) | |
| tree | be0e21c059e83ff017e7a5e65078fd7f2217dac8 /drivers/gpu/drm/tiny/simpledrm.c | |
| parent | 0dd80b483b95abdbc3919cb360d17179a5f85d2c (diff) | |
| download | linux-9239f3e1807c282e3c6bced510640910e9b25c60.tar.xz | |
drm/simpledrm: Support virtual screen sizes
Add constants for the maximum size of the shadow-plane surface
size. Useful for shadow planes with virtual screen sizes. The
current sizes are 4096 scanlines with 4096 pixels each. This
seems reasonable for current hardware, but can be increased as
necessary.
In simpledrm, set the maximum framebuffer size from the constants
for shadow planes. Implements support for virtual screen sizes and
page flipping on the fbdev console.
v3:
* use decimal numbers for shadow-plane constants (Noralf)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211110103702.374-9-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/tiny/simpledrm.c')
| -rw-r--r-- | drivers/gpu/drm/tiny/simpledrm.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 7c7d0aca8e31..2f999915b9aa 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -2,6 +2,7 @@ #include <linux/clk.h> #include <linux/of_clk.h> +#include <linux/minmax.h> #include <linux/platform_data/simplefb.h> #include <linux/platform_device.h> #include <linux/regulator/consumer.h> @@ -772,6 +773,7 @@ static int simpledrm_device_init_modeset(struct simpledrm_device *sdev) struct drm_display_mode *mode = &sdev->mode; struct drm_connector *connector = &sdev->connector; struct drm_simple_display_pipe *pipe = &sdev->pipe; + unsigned long max_width, max_height; const uint32_t *formats; size_t nformats; int ret; @@ -780,10 +782,13 @@ static int simpledrm_device_init_modeset(struct simpledrm_device *sdev) if (ret) return ret; + max_width = max_t(unsigned long, mode->hdisplay, DRM_SHADOW_PLANE_MAX_WIDTH); + max_height = max_t(unsigned long, mode->vdisplay, DRM_SHADOW_PLANE_MAX_HEIGHT); + dev->mode_config.min_width = mode->hdisplay; - dev->mode_config.max_width = mode->hdisplay; + dev->mode_config.max_width = max_width; dev->mode_config.min_height = mode->vdisplay; - dev->mode_config.max_height = mode->vdisplay; + dev->mode_config.max_height = max_height; dev->mode_config.prefer_shadow_fbdev = true; dev->mode_config.preferred_depth = sdev->format->cpp[0] * 8; dev->mode_config.funcs = &simpledrm_mode_config_funcs; |