[PATCH v2] drm/imx: use bus_flags for pixel clock polarity
Stefan Agner
stefan at agner.ch
Sat Jun 4 20:37:04 UTC 2016
On 2016-05-17 08:23, Philipp Zabel wrote:
> This patch allows panels to set pixel clock and data enable pin polarity
> other than the default of driving data at the falling pixel clock edge
> and active high display enable.
>
> Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
> ---
> Changes since v1:
> - Invert polarity - driving pixel data on the falling edge and sampling
> it at the rising edge is the default.
> - Rename imx_drm_set_bus_format_pins to imx_drm_set_bus_config as now,
> additionally to bus format and pins, it also sets polarities.
Looks good to me!
Reviewed-by: Stefan Agner <stefan at agner.ch>
--
Stefan
> ---
> drivers/gpu/drm/imx/imx-drm-core.c | 13 ++++++++-----
> drivers/gpu/drm/imx/imx-drm.h | 7 ++++---
> drivers/gpu/drm/imx/imx-tve.c | 6 ++++--
> drivers/gpu/drm/imx/ipuv3-crtc.c | 10 +++++++---
> drivers/gpu/drm/imx/parallel-display.c | 4 ++--
> 5 files changed, 25 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/imx/imx-drm-core.c
> b/drivers/gpu/drm/imx/imx-drm-core.c
> index e26dcde..1da77fd 100644
> --- a/drivers/gpu/drm/imx/imx-drm-core.c
> +++ b/drivers/gpu/drm/imx/imx-drm-core.c
> @@ -96,8 +96,8 @@ static struct imx_drm_crtc *imx_drm_find_crtc(struct
> drm_crtc *crtc)
> return NULL;
> }
>
> -int imx_drm_set_bus_format_pins(struct drm_encoder *encoder, u32 bus_format,
> - int hsync_pin, int vsync_pin)
> +int imx_drm_set_bus_config(struct drm_encoder *encoder, u32 bus_format,
> + int hsync_pin, int vsync_pin, u32 bus_flags)
> {
> struct imx_drm_crtc_helper_funcs *helper;
> struct imx_drm_crtc *imx_crtc;
> @@ -109,14 +109,17 @@ int imx_drm_set_bus_format_pins(struct
> drm_encoder *encoder, u32 bus_format,
> helper = &imx_crtc->imx_drm_helper_funcs;
> if (helper->set_interface_pix_fmt)
> return helper->set_interface_pix_fmt(encoder->crtc,
> - bus_format, hsync_pin, vsync_pin);
> + bus_format, hsync_pin, vsync_pin,
> + bus_flags);
> return 0;
> }
> -EXPORT_SYMBOL_GPL(imx_drm_set_bus_format_pins);
> +EXPORT_SYMBOL_GPL(imx_drm_set_bus_config);
>
> int imx_drm_set_bus_format(struct drm_encoder *encoder, u32 bus_format)
> {
> - return imx_drm_set_bus_format_pins(encoder, bus_format, 2, 3);
> + return imx_drm_set_bus_config(encoder, bus_format, 2, 3,
> + DRM_BUS_FLAG_DE_HIGH |
> + DRM_BUS_FLAG_PIXDATA_NEGEDGE);
> }
> EXPORT_SYMBOL_GPL(imx_drm_set_bus_format);
>
> diff --git a/drivers/gpu/drm/imx/imx-drm.h b/drivers/gpu/drm/imx/imx-drm.h
> index b0241b9..74320a1 100644
> --- a/drivers/gpu/drm/imx/imx-drm.h
> +++ b/drivers/gpu/drm/imx/imx-drm.h
> @@ -19,7 +19,8 @@ struct imx_drm_crtc_helper_funcs {
> int (*enable_vblank)(struct drm_crtc *crtc);
> void (*disable_vblank)(struct drm_crtc *crtc);
> int (*set_interface_pix_fmt)(struct drm_crtc *crtc,
> - u32 bus_format, int hsync_pin, int vsync_pin);
> + u32 bus_format, int hsync_pin, int vsync_pin,
> + u32 bus_flags);
> const struct drm_crtc_helper_funcs *crtc_helper_funcs;
> const struct drm_crtc_funcs *crtc_funcs;
> };
> @@ -41,8 +42,8 @@ void imx_drm_mode_config_init(struct drm_device *drm);
>
> struct drm_gem_cma_object *imx_drm_fb_get_obj(struct drm_framebuffer *fb);
>
> -int imx_drm_set_bus_format_pins(struct drm_encoder *encoder,
> - u32 bus_format, int hsync_pin, int vsync_pin);
> +int imx_drm_set_bus_config(struct drm_encoder *encoder, u32 bus_format,
> + int hsync_pin, int vsync_pin, u32 bus_flags);
> int imx_drm_set_bus_format(struct drm_encoder *encoder,
> u32 bus_format);
>
> diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
> index ae7a9fb..baf7881 100644
> --- a/drivers/gpu/drm/imx/imx-tve.c
> +++ b/drivers/gpu/drm/imx/imx-tve.c
> @@ -294,8 +294,10 @@ static void imx_tve_encoder_prepare(struct
> drm_encoder *encoder)
>
> switch (tve->mode) {
> case TVE_MODE_VGA:
> - imx_drm_set_bus_format_pins(encoder, MEDIA_BUS_FMT_GBR888_1X24,
> - tve->hsync_pin, tve->vsync_pin);
> + imx_drm_set_bus_config(encoder, MEDIA_BUS_FMT_GBR888_1X24,
> + tve->hsync_pin, tve->vsync_pin,
> + DRM_BUS_FLAG_DE_HIGH |
> + DRM_BUS_FLAG_PIXDATA_NEGEDGE);
> break;
> case TVE_MODE_TVOUT:
> imx_drm_set_bus_format(encoder, MEDIA_BUS_FMT_YUV8_1X24);
> diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
> index dee8e8b..438e6c4 100644
> --- a/drivers/gpu/drm/imx/ipuv3-crtc.c
> +++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
> @@ -66,6 +66,7 @@ struct ipu_crtc {
> struct ipu_flip_work *flip_work;
> int irq;
> u32 bus_format;
> + u32 bus_flags;
> int di_hsync_pin;
> int di_vsync_pin;
> };
> @@ -271,8 +272,10 @@ static int ipu_crtc_mode_set(struct drm_crtc *crtc,
> else
> sig_cfg.clkflags = 0;
>
> - sig_cfg.enable_pol = 1;
> - sig_cfg.clk_pol = 0;
> + sig_cfg.enable_pol = !(ipu_crtc->bus_flags & DRM_BUS_FLAG_DE_LOW);
> + /* Default to driving pixel data on negative clock edges */
> + sig_cfg.clk_pol = !!(ipu_crtc->bus_flags &
> + DRM_BUS_FLAG_PIXDATA_POSEDGE);
> sig_cfg.bus_format = ipu_crtc->bus_format;
> sig_cfg.v_to_h_sync = 0;
> sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
> @@ -396,11 +399,12 @@ static void ipu_disable_vblank(struct drm_crtc *crtc)
> }
>
> static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc,
> - u32 bus_format, int hsync_pin, int vsync_pin)
> + u32 bus_format, int hsync_pin, int vsync_pin, u32 bus_flags)
> {
> struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
>
> ipu_crtc->bus_format = bus_format;
> + ipu_crtc->bus_flags = bus_flags;
> ipu_crtc->di_hsync_pin = hsync_pin;
> ipu_crtc->di_vsync_pin = vsync_pin;
>
> diff --git a/drivers/gpu/drm/imx/parallel-display.c
> b/drivers/gpu/drm/imx/parallel-display.c
> index 363e2c7..3db634d 100644
> --- a/drivers/gpu/drm/imx/parallel-display.c
> +++ b/drivers/gpu/drm/imx/parallel-display.c
> @@ -115,8 +115,8 @@ static void imx_pd_encoder_dpms(struct drm_encoder
> *encoder, int mode)
> static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
> {
> struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
> -
> - imx_drm_set_bus_format(encoder, imxpd->bus_format);
> + imx_drm_set_bus_config(encoder, imxpd->bus_format, 2, 3,
> + imxpd->connector.display_info.bus_flags);
> }
>
> static void imx_pd_encoder_commit(struct drm_encoder *encoder)
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