Re: [PATCH v5 22/22] drm/sun4i: tv: Convert to the new TV mode property

Jernej Škrabec
2022-10-13T18:24:59Z

Hi Maxime,

Dne četrtek, 13. oktober 2022 ob 15:19:06 CEST je Maxime Ripard napisal(a):
> Now that the core can deal fine with analog TV modes, let's convert the
> sun4i TV driver to leverage those new features.
>
> Acked-by: Noralf Trønnes <noralf@tronnes.org>
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
>
> ---
> Changes in v5:
> - Removed the count variable in get_modes
> - Removed spurious vc4 change
> ---
> drivers/gpu/drm/sun4i/sun4i_tv.c | 145
> +++++++++++++-------------------------- 1 file changed, 48 insertions(+),
> 97 deletions(-)
>
> diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c
> b/drivers/gpu/drm/sun4i/sun4i_tv.c index c65f0a89b6b0..4f07aff11551 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_tv.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_tv.c
> @@ -141,23 +141,14 @@ struct resync_parameters {
> struct tv_mode {
> char *name;
>
> + unsigned int tv_mode;
> +
> u32 mode;
> u32 chroma_freq;
> u16 back_porch;
> u16 front_porch;
> - u16 line_number;
> u16 vblank_level;

isn't there a way to get or calculate back_porch, front_porch and vblank_level
from mode? From quick glance over removed values below, I would say that at
least back_porch can be removed too?

Otherwise this patch looks ok.

Best regards,
Jernej

>
> - u32 hdisplay;
> - u16 hfront_porch;
> - u16 hsync_len;
> - u16 hback_porch;
> -
> - u32 vdisplay;
> - u16 vfront_porch;
> - u16 vsync_len;
> - u16 vback_porch;
> -
> bool yc_en;
> bool dac3_en;
> bool dac_bit25_en;
> @@ -213,7 +204,7 @@ static const struct resync_parameters
> pal_resync_parameters = {
>
> static const struct tv_mode tv_modes[] = {
> {
> - .name = "NTSC",
> + .tv_mode = DRM_MODE_TV_MODE_NTSC,
> .mode = SUN4I_TVE_CFG0_RES_480i,
> .chroma_freq = 0x21f07c1f,
> .yc_en = true,
> @@ -222,17 +213,6 @@ static const struct tv_mode tv_modes[] = {
>
> .back_porch = 118,
> .front_porch = 32,
> - .line_number = 525,
> -
> - .hdisplay = 720,
> - .hfront_porch = 18,
> - .hsync_len = 2,
> - .hback_porch = 118,
> -
> - .vdisplay = 480,
> - .vfront_porch = 26,
> - .vsync_len = 2,
> - .vback_porch = 17,
>
> .vblank_level = 240,
>
> @@ -242,23 +222,12 @@ static const struct tv_mode tv_modes[] = {
> .resync_params = &ntsc_resync_parameters,
> },
> {
> - .name = "PAL",
> + .tv_mode = DRM_MODE_TV_MODE_PAL,
> .mode = SUN4I_TVE_CFG0_RES_576i,
> .chroma_freq = 0x2a098acb,
>
> .back_porch = 138,
> .front_porch = 24,
> - .line_number = 625,
> -
> - .hdisplay = 720,
> - .hfront_porch = 3,
> - .hsync_len = 2,
> - .hback_porch = 139,
> -
> - .vdisplay = 576,
> - .vfront_porch = 28,
> - .vsync_len = 2,
> - .vback_porch = 19,
>
> .vblank_level = 252,
>
> @@ -276,63 +245,21 @@ drm_encoder_to_sun4i_tv(struct drm_encoder *encoder)
> encoder);
> }
>
> -/*
> - * FIXME: If only the drm_display_mode private field was usable, this
> - * could go away...
> - *
> - * So far, it doesn't seem to be preserved when the mode is passed by
> - * to mode_set for some reason.
> - */
> -static const struct tv_mode *sun4i_tv_find_tv_by_mode(const struct
> drm_display_mode *mode) +static const struct tv_mode *
> +sun4i_tv_find_tv_by_mode(unsigned int mode)
> {
> int i;
>
> - /* First try to identify the mode by name */
> for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
> const struct tv_mode *tv_mode = &tv_modes[i];
>
> - DRM_DEBUG_DRIVER("Comparing mode %s vs %s",
> - mode->name, tv_mode->name);
> -
> - if (!strcmp(mode->name, tv_mode->name))
> - return tv_mode;
> - }
> -
> - /* Then by number of lines */
> - for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
> - const struct tv_mode *tv_mode = &tv_modes[i];
> -
> - DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs
%d)",
> - mode->name, tv_mode->name,
> - mode->vdisplay, tv_mode-
>vdisplay);
> -
> - if (mode->vdisplay == tv_mode->vdisplay)
> + if (tv_mode->tv_mode == mode)
> return tv_mode;
> }
>
> return NULL;
> }
>
> -static void sun4i_tv_mode_to_drm_mode(const struct tv_mode *tv_mode,
> - struct drm_display_mode
*mode)
> -{
> - DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name);
> -
> - mode->type = DRM_MODE_TYPE_DRIVER;
> - mode->clock = 13500;
> - mode->flags = DRM_MODE_FLAG_INTERLACE;
> -
> - mode->hdisplay = tv_mode->hdisplay;
> - mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch;
> - mode->hsync_end = mode->hsync_start + tv_mode->hsync_len;
> - mode->htotal = mode->hsync_end + tv_mode->hback_porch;
> -
> - mode->vdisplay = tv_mode->vdisplay;
> - mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch;
> - mode->vsync_end = mode->vsync_start + tv_mode->vsync_len;
> - mode->vtotal = mode->vsync_end + tv_mode->vback_porch;
> -}
> -
> static void sun4i_tv_disable(struct drm_encoder *encoder,
> struct drm_atomic_state *state)
> {
> @@ -356,7 +283,11 @@ static void sun4i_tv_enable(struct drm_encoder
> *encoder, struct drm_crtc_state *crtc_state =
> drm_atomic_get_new_crtc_state(state, encoder->crtc);
> struct drm_display_mode *mode = &crtc_state->mode;
> - const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
> + struct drm_connector *connector = &tv->connector;
> + struct drm_connector_state *conn_state =
> + drm_atomic_get_new_connector_state(state, connector);
> + const struct tv_mode *tv_mode =
> + sun4i_tv_find_tv_by_mode(conn_state->tv.mode);
>
> DRM_DEBUG_DRIVER("Enabling the TV Output\n");
>
> @@ -404,7 +335,7 @@ static void sun4i_tv_enable(struct drm_encoder *encoder,
> /* Set the lines setup */
> regmap_write(tv->regs, SUN4I_TVE_LINE_REG,
> SUN4I_TVE_LINE_FIRST(22) |
> - SUN4I_TVE_LINE_NUMBER(tv_mode->line_number));
> + SUN4I_TVE_LINE_NUMBER(mode->vtotal));
>
> regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG,
> SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels-
>blank) |
> @@ -467,35 +398,43 @@ static const struct drm_encoder_helper_funcs
> sun4i_tv_helper_funcs = {
>
> static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
> {
> - int i;
> + struct drm_display_mode *mode;
>
> - for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
> - struct drm_display_mode *mode;
> - const struct tv_mode *tv_mode = &tv_modes[i];
> -
> - mode = drm_mode_create(connector->dev);
> - if (!mode) {
> - DRM_ERROR("Failed to create a new display
mode\n");
> - return 0;
> - }
> + mode = drm_mode_analog_ntsc_480i(connector->dev);
> + if (!mode) {
> + DRM_ERROR("Failed to create a new display mode\n");
> + return -ENOMEM;
> + }
>
> - strcpy(mode->name, tv_mode->name);
> + mode->type |= DRM_MODE_TYPE_PREFERRED;
> + drm_mode_probed_add(connector, mode);
>
> - sun4i_tv_mode_to_drm_mode(tv_mode, mode);
> - drm_mode_probed_add(connector, mode);
> + mode = drm_mode_analog_pal_576i(connector->dev);
> + if (!mode) {
> + DRM_ERROR("Failed to create a new display mode\n");
> + return -ENOMEM;
> }
>
> - return i;
> + drm_mode_probed_add(connector, mode);
> +
> + return 2;
> }
>
> static const struct drm_connector_helper_funcs
> sun4i_tv_comp_connector_helper_funcs = { + .atomic_check =
> drm_atomic_helper_connector_tv_check,
> .get_modes = sun4i_tv_comp_get_modes,
> };
>
> +static void sun4i_tv_connector_reset(struct drm_connector *connector)
> +{
> + drm_atomic_helper_connector_reset(connector);
> + drm_atomic_helper_connector_tv_reset(connector);
> +}
> +
> static const struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
> .fill_modes = drm_helper_probe_single_connector_modes,
> .destroy = drm_connector_cleanup,
> - .reset =
drm_atomic_helper_connector_reset,
> + .reset = sun4i_tv_connector_reset,
> .atomic_duplicate_state =
drm_atomic_helper_connector_duplicate_state,
> .atomic_destroy_state =
drm_atomic_helper_connector_destroy_state,
> };
> @@ -587,8 +526,20 @@ static int sun4i_tv_bind(struct device *dev, struct
> device *master,
>
> drm_connector_attach_encoder(&tv->connector, &tv->encoder);
>
> + ret = drm_mode_create_tv_properties(drm,
> +
BIT(DRM_MODE_TV_MODE_NTSC) |
> +
BIT(DRM_MODE_TV_MODE_PAL));
> + if (ret)
> + goto err_cleanup_connector;
> +
> + drm_object_attach_property(&tv->connector.base,
> + drm-
>mode_config.tv_mode_property,
> + DRM_MODE_TV_MODE_NTSC);
> +
> return 0;
>
> +err_cleanup_connector:
> + drm_connector_cleanup(&tv->connector);
> err_cleanup_encoder:
> drm_encoder_cleanup(&tv->encoder);
> err_disable_clk:
>
> --
> b4 0.11.0-dev-7da52