mirror of https://gitee.com/openkylin/linux.git
drm/stm: ltdc: add clut mode support
Add the 8-bit clut mode support at crtc level. Useful for low memory footprint user interfaces but also for 8-bit old games (including color shifting visual effects). Tested with fbdev FBIOPUTCMAP & drm DRM_IOCTL_MODE_SETGAMMA ioctls. Signed-off-by: Philippe Cornu <philippe.cornu@st.com> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/1509016666-18927-1-git-send-email-philippe.cornu@st.com
This commit is contained in:
parent
c4712f27be
commit
b706a25eae
|
@ -175,6 +175,8 @@
|
||||||
|
|
||||||
#define LXCFBLNR_CFBLN GENMASK(10, 0) /* Color Frame Buffer Line Number */
|
#define LXCFBLNR_CFBLN GENMASK(10, 0) /* Color Frame Buffer Line Number */
|
||||||
|
|
||||||
|
#define CLUT_SIZE 256
|
||||||
|
|
||||||
#define CONSTA_MAX 0xFF /* CONSTant Alpha MAX= 1.0 */
|
#define CONSTA_MAX 0xFF /* CONSTant Alpha MAX= 1.0 */
|
||||||
#define BF1_PAXCA 0x600 /* Pixel Alpha x Constant Alpha */
|
#define BF1_PAXCA 0x600 /* Pixel Alpha x Constant Alpha */
|
||||||
#define BF1_CA 0x400 /* Constant Alpha */
|
#define BF1_CA 0x400 /* Constant Alpha */
|
||||||
|
@ -363,6 +365,28 @@ static irqreturn_t ltdc_irq(int irq, void *arg)
|
||||||
* DRM_CRTC
|
* DRM_CRTC
|
||||||
*/
|
*/
|
||||||
|
|
||||||
|
static void ltdc_crtc_update_clut(struct drm_crtc *crtc)
|
||||||
|
{
|
||||||
|
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
|
||||||
|
struct drm_color_lut *lut;
|
||||||
|
u32 val;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if (!crtc || !crtc->state)
|
||||||
|
return;
|
||||||
|
|
||||||
|
if (!crtc->state->color_mgmt_changed || !crtc->state->gamma_lut)
|
||||||
|
return;
|
||||||
|
|
||||||
|
lut = (struct drm_color_lut *)crtc->state->gamma_lut->data;
|
||||||
|
|
||||||
|
for (i = 0; i < CLUT_SIZE; i++, lut++) {
|
||||||
|
val = ((lut->red << 8) & 0xff0000) | (lut->green & 0xff00) |
|
||||||
|
(lut->blue >> 8) | (i << 24);
|
||||||
|
reg_write(ldev->regs, LTDC_L1CLUTWR, val);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
|
static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
|
||||||
struct drm_crtc_state *old_state)
|
struct drm_crtc_state *old_state)
|
||||||
{
|
{
|
||||||
|
@ -486,6 +510,8 @@ static void ltdc_crtc_atomic_flush(struct drm_crtc *crtc,
|
||||||
|
|
||||||
DRM_DEBUG_ATOMIC("\n");
|
DRM_DEBUG_ATOMIC("\n");
|
||||||
|
|
||||||
|
ltdc_crtc_update_clut(crtc);
|
||||||
|
|
||||||
/* Commit shadow registers = update planes at next vblank */
|
/* Commit shadow registers = update planes at next vblank */
|
||||||
reg_set(ldev->regs, LTDC_SRCR, SRCR_VBR);
|
reg_set(ldev->regs, LTDC_SRCR, SRCR_VBR);
|
||||||
|
|
||||||
|
@ -533,6 +559,7 @@ static const struct drm_crtc_funcs ltdc_crtc_funcs = {
|
||||||
.reset = drm_atomic_helper_crtc_reset,
|
.reset = drm_atomic_helper_crtc_reset,
|
||||||
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
|
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
|
||||||
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
|
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
|
||||||
|
.gamma_set = drm_atomic_helper_legacy_gamma_set,
|
||||||
};
|
};
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -765,6 +792,9 @@ static int ltdc_crtc_init(struct drm_device *ddev, struct drm_crtc *crtc)
|
||||||
|
|
||||||
drm_crtc_helper_add(crtc, <dc_crtc_helper_funcs);
|
drm_crtc_helper_add(crtc, <dc_crtc_helper_funcs);
|
||||||
|
|
||||||
|
drm_mode_crtc_set_gamma_size(crtc, CLUT_SIZE);
|
||||||
|
drm_crtc_enable_color_mgmt(crtc, 0, false, CLUT_SIZE);
|
||||||
|
|
||||||
DRM_DEBUG_DRIVER("CRTC:%d created\n", crtc->base.id);
|
DRM_DEBUG_DRIVER("CRTC:%d created\n", crtc->base.id);
|
||||||
|
|
||||||
/* Add planes. Note : the first layer is used by primary plane */
|
/* Add planes. Note : the first layer is used by primary plane */
|
||||||
|
|
Loading…
Reference in New Issue