xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm: mali-dp: enable gamma support

Browse Source 
Add gamma via the DRM GAMMA_LUT/GAMMA_LUT_SIZE CRTC
properties. The expected LUT size is 4096 in order
to produce as accurate a set of segments as possible.

This version uses only the green channel's gamma curve
to set the hardware curve on DP550/650. For the sake of
simplicity, it uses the same table of coefficients for
all 3 curves on DP500.

Signed-off-by: Mihail Atanassov <mihail.atanassov@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
This commit is contained in:
Mihail Atanassov
2017-02-01 14:48:50 +00:00
committed by Liviu Dudau
parent 99665d0721
commit 02725d3137
6 changed files with 196 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
drivers/gpu/drm/arm/malidp_drv.c
View File

@@ -34,6 +34,51 @@
#define MALIDP_CONF_VALID_TIMEOUT 250
static void malidp_write_gamma_table(struct malidp_hw_device *hwdev,
u32 data[MALIDP_COEFFTAB_NUM_COEFFS])
{
int i;
/* Update all channels with a single gamma curve. */
const u32 gamma_write_mask = GENMASK(18, 16);
/*
* Always write an entire table, so the address field in
* DE_COEFFTAB_ADDR is 0 and we can use the gamma_write_mask bitmask
* directly.
*/
malidp_hw_write(hwdev, gamma_write_mask,
hwdev->map.coeffs_base + MALIDP_COEF_TABLE_ADDR);
for (i = 0; i < MALIDP_COEFFTAB_NUM_COEFFS; ++i)
malidp_hw_write(hwdev, data[i],
hwdev->map.coeffs_base +
MALIDP_COEF_TABLE_DATA);
}
static void malidp_atomic_commit_update_gamma(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
struct malidp_hw_device *hwdev = malidp->dev;
if (!crtc->state->color_mgmt_changed)
return;
if (!crtc->state->gamma_lut) {
malidp_hw_clearbits(hwdev,
MALIDP_DISP_FUNC_GAMMA,
MALIDP_DE_DISPLAY_FUNC);
} else {
struct malidp_crtc_state *mc =
to_malidp_crtc_state(crtc->state);
if (!old_state->gamma_lut || (crtc->state->gamma_lut->base.id !=
old_state->gamma_lut->base.id))
malidp_write_gamma_table(hwdev, mc->gamma_coeffs);
malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_GAMMA,
MALIDP_DE_DISPLAY_FUNC);
}
}
/*
* set the "config valid" bit and wait until the hardware acts on it
*/
@@ -92,11 +137,17 @@ static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state)
static void malidp_atomic_commit_tail(struct drm_atomic_state *state)
{
struct drm_device *drm = state->dev;
struct drm_crtc *crtc;
struct drm_crtc_state *old_crtc_state;
int i;
pm_runtime_get_sync(drm->dev);
drm_atomic_helper_commit_modeset_disables(drm, state);
for_each_crtc_in_state(state, crtc, old_crtc_state, i)
malidp_atomic_commit_update_gamma(crtc, old_crtc_state);
drm_atomic_helper_commit_planes(drm, state, 0);
drm_atomic_helper_commit_modeset_enables(drm, state);