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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-03-30 12:51:16 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-05-31 17:56:44 +0300 |
| commit | cf48e2921ee95011a164dc31e8725022bd008666 (patch) | |
| tree | 0a63daf92e6caa63994659d5480b599c70aa849b /drivers | |
| parent | 1bd816f120718d578af7e4b623b9a0dec59c028c (diff) | |
| download | linux-cf48e2921ee95011a164dc31e8725022bd008666.tar.xz | |
drm: Initialize a linear gamma table by default
Code stolen from gma500.
This is just a minor bit of safety code that I spotted and figured it
might be useful if we put it into the core. This is to make the
get_gamma ioctl reflect likely reality even before the first set_gamma
ioctl call.
v2 on irc: Extend commit message per Maarten's suggestions.
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459331485-28376-2-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 13 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/psb_intel_display.c | 7 |
2 files changed, 13 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index d2a6d958ca76..37427b2bb9fc 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -5139,6 +5139,9 @@ EXPORT_SYMBOL(drm_mode_connector_attach_encoder); int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, int gamma_size) { + uint16_t *r_base, *g_base, *b_base; + int i; + crtc->gamma_size = gamma_size; crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, @@ -5148,6 +5151,16 @@ int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, return -ENOMEM; } + r_base = crtc->gamma_store; + g_base = r_base + gamma_size; + b_base = g_base + gamma_size; + for (i = 0; i < gamma_size; i++) { + r_base[i] = i << 8; + g_base[i] = i << 8; + b_base[i] = i << 8; + } + + return 0; } EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); diff --git a/drivers/gpu/drm/gma500/psb_intel_display.c b/drivers/gpu/drm/gma500/psb_intel_display.c index 398015be87e4..7b6c84925098 100644 --- a/drivers/gpu/drm/gma500/psb_intel_display.c +++ b/drivers/gpu/drm/gma500/psb_intel_display.c @@ -491,7 +491,6 @@ void psb_intel_crtc_init(struct drm_device *dev, int pipe, struct drm_psb_private *dev_priv = dev->dev_private; struct gma_crtc *gma_crtc; int i; - uint16_t *r_base, *g_base, *b_base; /* We allocate a extra array of drm_connector pointers * for fbdev after the crtc */ @@ -519,16 +518,10 @@ void psb_intel_crtc_init(struct drm_device *dev, int pipe, gma_crtc->pipe = pipe; gma_crtc->plane = pipe; - r_base = gma_crtc->base.gamma_store; - g_base = r_base + 256; - b_base = g_base + 256; for (i = 0; i < 256; i++) { gma_crtc->lut_r[i] = i; gma_crtc->lut_g[i] = i; gma_crtc->lut_b[i] = i; - r_base[i] = i << 8; - g_base[i] = i << 8; - b_base[i] = i << 8; gma_crtc->lut_adj[i] = 0; } |