Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/vesadrm: Prepare color management for palette-based framebuffers
Distiguish between component-based formats and 'the rest' in vesadrm's
color management. Scanout buffers with component-based format allow
for gamma correction. Palette-based formats (i.e., 'the rest') require
palette setup.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20250714151513.309475-9-tzimmermann@suse.de
+15
-8
+15
-8
drivers/gpu/drm/sysfb/vesadrm.c
+15
-8
drivers/gpu/drm/sysfb/vesadrm.c
···
223
223
* plane's color format.
224
224
*/
225
225
if (crtc_state->enable && crtc_state->color_mgmt_changed) {
226
-
if (sysfb_crtc_state->format == sysfb->fb_format) {
227
-
if (crtc_state->gamma_lut)
228
-
vesadrm_load_gamma_lut(vesa,
229
-
sysfb_crtc_state->format,
230
-
crtc_state->gamma_lut->data);
231
-
else
226
+
switch (sysfb->fb_format->format) {
227
+
/*
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+
* Component formats
229
+
*/
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+
default:
231
+
if (sysfb_crtc_state->format == sysfb->fb_format) {
232
+
if (crtc_state->gamma_lut)
233
+
vesadrm_load_gamma_lut(vesa,
234
+
sysfb_crtc_state->format,
235
+
crtc_state->gamma_lut->data);
236
+
else
237
+
vesadrm_fill_gamma_lut(vesa, sysfb_crtc_state->format);
238
+
} else {
232
239
vesadrm_fill_gamma_lut(vesa, sysfb_crtc_state->format);
233
-
} else {
234
-
vesadrm_fill_gamma_lut(vesa, sysfb_crtc_state->format);
240
+
}
241
+
break;
235
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}
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243
}
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244
}