On 8/25/23 15:54, Manikandan Muralidharan wrote:
> 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 <manikanda...@microchip.com>
> [durai.manicka...@microchip.com: update DPI mode bit using is_xlcdc flag]
> Signed-off-by: Durai Manickam KR <durai.manicka...@microchip.com>
> ---
> .../gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 22 ++++++++++++++++---
> 1 file changed, 19 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> index 4b11a1de8af4..c3d0c60ba419 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> @@ -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;
> + bool dpi;
To avoid confusion, better use u8 to avoid shifting a boolean value in
configuration phase.
> };
>
> static inline struct atmel_hlcdc_crtc_state *
> @@ -164,6 +166,8 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct
> drm_crtc *c)
>
> state = drm_crtc_state_to_atmel_hlcdc_crtc_state(c->state);
> cfg = state->output_mode << 8;
> + if (is_xlcdc)
> + cfg |= state->dpi << 11;
>
> if (!is_xlcdc && (adj->flags & DRM_MODE_FLAG_NVSYNC))
> cfg |= ATMEL_HLCDC_VSPOL;
> @@ -176,7 +180,9 @@ 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 |
> + (is_xlcdc ? ATMEL_XLCDC_MODE_MASK |
> + ATMEL_XLCDC_DPI : ATMEL_HLCDC_MODE_MASK),
> cfg);
>
> clk_disable_unprepare(crtc->dc->hlcdc->sys_clk);
> @@ -366,7 +372,15 @@ 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 = true;
> + } else {
> + hstate->dpi = false;
> + }
> + }
> return 0;
> }
>
> @@ -470,7 +484,7 @@ 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;
>
> @@ -481,6 +495,8 @@ 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;
> }
