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drm: atmel-hlcdc: add DPI mode support for XLCDC

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Add support for Display Pixel Interface (DPI) Compatible Mode
support in atmel-hlcdc driver for XLCDC IP along with legacy
pixel mapping. DPI mode BIT is configured in LCDC_CFG5 register.

Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
[durai.manickamkr@microchip.com: update DPI mode bit using is_xlcdc flag]
Signed-off-by: Durai Manickam KR <durai.manickamkr@microchip.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240424053351.589830-6-manikandan.m@microchip.com
This commit is contained in:
Manikandan Muralidharan 2024-04-24 11:03:48 +05:30 committed by Sam Ravnborg
parent d498771b0b
commit 0af86604e3
1 changed files with 19 additions and 2 deletions
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21
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
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@ -30,10 +30,12 @@
*
* @base: base CRTC state
* @output_mode: RGBXXX output mode
* @dpi: output DPI mode
*/
struct atmel_hlcdc_crtc_state {
struct drm_crtc_state base;
unsigned int output_mode;
u8 dpi;
};
static inline struct atmel_hlcdc_crtc_state *
@ -170,6 +172,8 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
if (adj->flags & DRM_MODE_FLAG_NHSYNC)
cfg |= ATMEL_HLCDC_HSPOL;
} else {
cfg |= state->dpi << 11;
}
regmap_update_bits(regmap, ATMEL_HLCDC_CFG(5),
@ -177,7 +181,9 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
ATMEL_HLCDC_VSPDLYS | ATMEL_HLCDC_VSPDLYE |
ATMEL_HLCDC_DISPPOL | ATMEL_HLCDC_DISPDLY |
ATMEL_HLCDC_VSPSU | ATMEL_HLCDC_VSPHO |
ATMEL_HLCDC_GUARDTIME_MASK | ATMEL_HLCDC_MODE_MASK,
ATMEL_HLCDC_GUARDTIME_MASK |
(crtc->dc->desc->is_xlcdc ? ATMEL_XLCDC_MODE_MASK |
ATMEL_XLCDC_DPI : ATMEL_HLCDC_MODE_MASK),
cfg);
clk_disable_unprepare(crtc->dc->hlcdc->sys_clk);
@ -380,7 +386,15 @@ static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state)
hstate = drm_crtc_state_to_atmel_hlcdc_crtc_state(state);
hstate->output_mode = fls(output_fmts) - 1;
if (crtc->dc->desc->is_xlcdc) {
/* check if MIPI DPI bit needs to be set */
if (fls(output_fmts) > 3) {
hstate->output_mode -= 4;
hstate->dpi = 1;
} else {
hstate->dpi = 0;
}
}
return 0;
}
@ -484,6 +498,7 @@ static struct drm_crtc_state *
atmel_hlcdc_crtc_duplicate_state(struct drm_crtc *crtc)
{
struct atmel_hlcdc_crtc_state *state, *cur;
struct atmel_hlcdc_crtc *c = drm_crtc_to_atmel_hlcdc_crtc(crtc);
if (WARN_ON(!crtc->state))
return NULL;
@ -495,6 +510,8 @@ atmel_hlcdc_crtc_duplicate_state(struct drm_crtc *crtc)
cur = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state);
state->output_mode = cur->output_mode;
if (c->dc->desc->is_xlcdc)
state->dpi = cur->dpi;
return &state->base;
}