Hi,
Denis Carikli wrote:
> The previous hardware behaviour was kept if the
> flags are not set.
>
> Signed-off-by: Denis Carikli <denis@xxxxxxxxxx>
> ---
> ChangeLog v10->v11:
> - This patch was splitted-out and adapted from:
> "Prepare imx-drm for extra display-timings retrival."
> - The display-timings dt specific part was removed.
> - The flags names were changed to use the DRM ones from:
> "drm: drm_display_mode: add signal polarity flags"
> ---
> drivers/staging/imx-drm/imx-drm-core.c | 10 ++++++++++
> drivers/staging/imx-drm/imx-drm.h | 6 ++++++
> drivers/staging/imx-drm/imx-hdmi.c | 3 +++
> drivers/staging/imx-drm/imx-ldb.c | 3 +++
> drivers/staging/imx-drm/imx-tve.c | 3 +++
> drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h | 6 ++++--
> drivers/staging/imx-drm/ipu-v3/ipu-di.c | 7 ++++++-
> drivers/staging/imx-drm/ipuv3-crtc.c | 21 +++++++++++++++++++--
> 3 files changed, 29 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h b/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h
> index b95cba1..3abeea3 100644
> --- a/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h
> +++ b/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h
> @@ -29,9 +29,11 @@ enum ipuv3_type {
>
> #define CLK_POL_ACTIVE_LOW 0
> #define CLK_POL_ACTIVE_HIGH 1
> +#define CLK_POL_PRESERVE 2
>
> #define ENABLE_POL_NEGEDGE 0
> #define ENABLE_POL_POSEDGE 1
> +#define ENABLE_POL_PRESERVE 2
>
> /*
> * Bitfield of Display Interface signal polarities.
> @@ -43,10 +45,10 @@ struct ipu_di_signal_cfg {
> unsigned clksel_en:1;
> unsigned clkidle_en:1;
> unsigned data_pol:1; /* true = inverted */
> - unsigned clk_pol:1;
> - unsigned enable_pol:1;
> unsigned Hsync_pol:1; /* true = active high */
> unsigned Vsync_pol:1;
> + u8 clk_pol;
> + u8 enable_pol;
>
> u16 width;
> u16 height;
> diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-di.c b/drivers/staging/imx-drm/ipu-v3/ipu-di.c
> index 53646aa..791080b 100644
> --- a/drivers/staging/imx-drm/ipu-v3/ipu-di.c
> +++ b/drivers/staging/imx-drm/ipu-v3/ipu-di.c
> @@ -597,6 +597,8 @@ int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
>
> if (sig->clk_pol == CLK_POL_ACTIVE_HIGH)
> di_gen |= DI_GEN_POLARITY_DISP_CLK;
> + else if (sig->clk_pol == CLK_POL_ACTIVE_LOW)
> + di_gen &= ~DI_GEN_POLARITY_DISP_CLK;
>
> ipu_di_write(di, di_gen, DI_GENERAL);
>
> @@ -604,10 +606,13 @@ int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
> DI_SYNC_AS_GEN);
>
> reg = ipu_di_read(di, DI_POL);
> - reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
> + reg &= ~(DI_POL_DRDY_DATA_POLARITY);
>
> if (sig->enable_pol == ENABLE_POL_POSEDGE)
> reg |= DI_POL_DRDY_POLARITY_15;
> + else if (sig->enable_pol == ENABLE_POL_NEGEDGE)
> + reg &= ~DI_POL_DRDY_POLARITY_15;
> +
> if (sig->data_pol)
> reg |= DI_POL_DRDY_DATA_POLARITY;
>
> diff --git a/drivers/staging/imx-drm/ipuv3-crtc.c b/drivers/staging/imx-drm/ipuv3-crtc.c
> index 8cfeb47..c75034e 100644
> --- a/drivers/staging/imx-drm/ipuv3-crtc.c
> +++ b/drivers/staging/imx-drm/ipuv3-crtc.c
> @@ -157,8 +157,25 @@ static int ipu_crtc_mode_set(struct drm_crtc *crtc,
> if (mode->flags & DRM_MODE_FLAG_PVSYNC)
> sig_cfg.Vsync_pol = 1;
>
> - sig_cfg.enable_pol = ENABLE_POL_POSEDGE;
> - sig_cfg.clk_pol = CLK_POL_ACTIVE_LOW;
> + if (mode->pol_flags & DRM_MODE_FLAG_POL_PIXDATA_POSEDGE)
> + sig_cfg.enable_pol = ENABLE_POL_POSEDGE;
> + else if (mode->pol_flags & DRM_MODE_FLAG_POL_DE_NEGEDGE)
> + sig_cfg.enable_pol = ENABLE_POL_NEGEDGE;
> + else if (mode->pol_flags & DRM_MODE_FLAG_POL_PIXDATA_PRESERVE)
> + sig_cfg.enable_pol = ENABLE_POL_PRESERVE;
> + else
> + sig_cfg.enable_pol = ENABLE_POL_POSEDGE;
> +
> + if (mode->private_flags & DRM_MODE_FLAG_POL_DE_POSEDGE)
> + sig_cfg.clk_pol = CLK_POL_ACTIVE_HIGH;
> + else if (mode->private_flags & DRM_MODE_FLAG_POL_DE_NEGEDGE)
> + sig_cfg.clk_pol = CLK_POL_ACTIVE_LOW;
> + else if (mode->private_flags & DRM_MODE_FLAG_POL_DE_PRESERVE)
> + sig_cfg.clk_pol = CLK_POL_PRESERVE;
> + else
> + sig_cfg.clk_pol = CLK_POL_ACTIVE_LOW;
>
This is completely messed up. POL_PIXDATA should obviously define the
clock edge at which the pixel data is sampled and thus should determine
the value of sig_cfg.clk_pol and POL_DE should determine the value of
sig_cfg.enable_pol.
Lothar Waßmann
--
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