[PATCH v6 3/6] drm: lcdif: Determine bus format and flags in ->atomic_check()
Liu Ying
victor.liu at nxp.com
Wed May 10 02:24:47 PDT 2023
Instead of determining LCDIF output bus format and bus flags in
->atomic_enable(), do that in ->atomic_check(). This is a
preparation for the upcoming patch to check consistent bus format
and bus flags across all first downstream bridges in ->atomic_check().
New lcdif_crtc_state structure is introduced to cache bus format
and bus flags states in ->atomic_check() so that they can be read
in ->atomic_enable().
Tested-by: Alexander Stein <alexander.stein at ew.tq-group.com>
Reviewed-by: Alexander Stein <alexander.stein at ew.tq-group.com>
Reviewed-by: Marek Vasut <marex at denx.de>
Signed-off-by: Liu Ying <victor.liu at nxp.com>
---
v5->v6:
* Add Marek's R-b tag.
* A slight change brought from the update in patch 2/6 to keep default
MEDIA_BUS_FMT_RGB888_1X24 bus format.
v4->v5:
* Add Alexander's R-b and T-b tags.
v3->v4:
* Use 'new_{c,p}state' instead of 'new_{crtc,plane}_state'. (Alexander)
* Simplify lcdif_crtc_reset() by calling lcdif_crtc_atomic_destroy_state().
(Alexander)
* Add '!crtc->state' check in lcdif_crtc_atomic_duplicate_state(). (Alexander)
v2->v3:
* No change.
v1->v2:
* Split from patch 2/2 in v1. (Marek, Alexander)
* Add comment on the 'base' member of lcdif_crtc_state structure to
note it should always be the first member. (Lothar)
drivers/gpu/drm/mxsfb/lcdif_kms.c | 140 ++++++++++++++++++++++--------
1 file changed, 102 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/mxsfb/lcdif_kms.c b/drivers/gpu/drm/mxsfb/lcdif_kms.c
index ba00a155d9b6..fab2253e4786 100644
--- a/drivers/gpu/drm/mxsfb/lcdif_kms.c
+++ b/drivers/gpu/drm/mxsfb/lcdif_kms.c
@@ -30,6 +30,18 @@
#include "lcdif_drv.h"
#include "lcdif_regs.h"
+struct lcdif_crtc_state {
+ struct drm_crtc_state base; /* always be the first member */
+ u32 bus_format;
+ u32 bus_flags;
+};
+
+static inline struct lcdif_crtc_state *
+to_lcdif_crtc_state(struct drm_crtc_state *s)
+{
+ return container_of(s, struct lcdif_crtc_state, base);
+}
+
/* -----------------------------------------------------------------------------
* CRTC
*/
@@ -385,48 +397,75 @@ static void lcdif_reset_block(struct lcdif_drm_private *lcdif)
readl(lcdif->base + LCDC_V8_CTRL);
}
-static void lcdif_crtc_mode_set_nofb(struct lcdif_drm_private *lcdif,
- struct drm_plane_state *plane_state,
- struct drm_bridge_state *bridge_state,
- const u32 bus_format)
+static void lcdif_crtc_mode_set_nofb(struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
{
- struct drm_device *drm = lcdif->crtc.dev;
- struct drm_display_mode *m = &lcdif->crtc.state->adjusted_mode;
- u32 bus_flags = 0;
-
- if (lcdif->bridge->timings)
- bus_flags = lcdif->bridge->timings->input_bus_flags;
- else if (bridge_state)
- bus_flags = bridge_state->input_bus_cfg.flags;
+ struct lcdif_crtc_state *lcdif_crtc_state = to_lcdif_crtc_state(crtc_state);
+ struct drm_device *drm = crtc_state->crtc->dev;
+ struct lcdif_drm_private *lcdif = to_lcdif_drm_private(drm);
+ struct drm_display_mode *m = &crtc_state->adjusted_mode;
DRM_DEV_DEBUG_DRIVER(drm->dev, "Pixel clock: %dkHz (actual: %dkHz)\n",
m->crtc_clock,
(int)(clk_get_rate(lcdif->clk) / 1000));
DRM_DEV_DEBUG_DRIVER(drm->dev, "Bridge bus_flags: 0x%08X\n",
- bus_flags);
+ lcdif_crtc_state->bus_flags);
DRM_DEV_DEBUG_DRIVER(drm->dev, "Mode flags: 0x%08X\n", m->flags);
/* Mandatory eLCDIF reset as per the Reference Manual */
lcdif_reset_block(lcdif);
- lcdif_set_formats(lcdif, plane_state, bus_format);
+ lcdif_set_formats(lcdif, plane_state, lcdif_crtc_state->bus_format);
- lcdif_set_mode(lcdif, bus_flags);
+ lcdif_set_mode(lcdif, lcdif_crtc_state->bus_flags);
}
static int lcdif_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
+ struct drm_device *drm = crtc->dev;
+ struct lcdif_drm_private *lcdif = to_lcdif_drm_private(drm);
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
crtc);
+ struct lcdif_crtc_state *lcdif_crtc_state = to_lcdif_crtc_state(crtc_state);
bool has_primary = crtc_state->plane_mask &
drm_plane_mask(crtc->primary);
+ struct drm_bridge_state *bridge_state;
+ struct drm_bridge *bridge = lcdif->bridge;
+ int ret;
/* The primary plane has to be enabled when the CRTC is active. */
if (crtc_state->active && !has_primary)
return -EINVAL;
- return drm_atomic_add_affected_planes(state, crtc);
+ ret = drm_atomic_add_affected_planes(state, crtc);
+ if (ret)
+ return ret;
+
+ bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
+ if (!bridge_state)
+ lcdif_crtc_state->bus_format = MEDIA_BUS_FMT_FIXED;
+ else
+ lcdif_crtc_state->bus_format = bridge_state->input_bus_cfg.format;
+
+ if (lcdif_crtc_state->bus_format == MEDIA_BUS_FMT_FIXED) {
+ dev_warn_once(drm->dev,
+ "Bridge does not provide bus format, assuming MEDIA_BUS_FMT_RGB888_1X24.\n"
+ "Please fix bridge driver by handling atomic_get_input_bus_fmts.\n");
+ lcdif_crtc_state->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+ } else if (!lcdif_crtc_state->bus_format) {
+ /* If all else fails, default to RGB888_1X24 */
+ lcdif_crtc_state->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+ }
+
+ if (bridge->timings)
+ lcdif_crtc_state->bus_flags = bridge->timings->input_bus_flags;
+ else if (bridge_state)
+ lcdif_crtc_state->bus_flags = bridge_state->input_bus_cfg.flags;
+ else
+ lcdif_crtc_state->bus_flags = 0;
+
+ return 0;
}
static void lcdif_crtc_atomic_flush(struct drm_crtc *crtc,
@@ -458,35 +497,18 @@ static void lcdif_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct lcdif_drm_private *lcdif = to_lcdif_drm_private(crtc->dev);
+ struct drm_crtc_state *new_cstate = drm_atomic_get_new_crtc_state(state, crtc);
struct drm_plane_state *new_pstate = drm_atomic_get_new_plane_state(state,
crtc->primary);
struct drm_display_mode *m = &lcdif->crtc.state->adjusted_mode;
- struct drm_bridge_state *bridge_state = NULL;
struct drm_device *drm = lcdif->drm;
- u32 bus_format;
dma_addr_t paddr;
- bridge_state = drm_atomic_get_new_bridge_state(state, lcdif->bridge);
- if (!bridge_state)
- bus_format = MEDIA_BUS_FMT_FIXED;
- else
- bus_format = bridge_state->input_bus_cfg.format;
-
- if (bus_format == MEDIA_BUS_FMT_FIXED) {
- dev_warn_once(drm->dev,
- "Bridge does not provide bus format, assuming MEDIA_BUS_FMT_RGB888_1X24.\n"
- "Please fix bridge driver by handling atomic_get_input_bus_fmts.\n");
- bus_format = MEDIA_BUS_FMT_RGB888_1X24;
- } else if (!bus_format) {
- /* If all else fails, default to RGB888_1X24 */
- bus_format = MEDIA_BUS_FMT_RGB888_1X24;
- }
-
clk_set_rate(lcdif->clk, m->crtc_clock * 1000);
pm_runtime_get_sync(drm->dev);
- lcdif_crtc_mode_set_nofb(lcdif, new_pstate, bridge_state, bus_format);
+ lcdif_crtc_mode_set_nofb(new_cstate, new_pstate);
/* Write cur_buf as well to avoid an initial corrupt frame */
paddr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
@@ -523,6 +545,48 @@ static void lcdif_crtc_atomic_disable(struct drm_crtc *crtc,
pm_runtime_put_sync(drm->dev);
}
+static void lcdif_crtc_atomic_destroy_state(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ __drm_atomic_helper_crtc_destroy_state(state);
+ kfree(to_lcdif_crtc_state(state));
+}
+
+static void lcdif_crtc_reset(struct drm_crtc *crtc)
+{
+ struct lcdif_crtc_state *state;
+
+ if (crtc->state)
+ lcdif_crtc_atomic_destroy_state(crtc, crtc->state);
+
+ crtc->state = NULL;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (state)
+ __drm_atomic_helper_crtc_reset(crtc, &state->base);
+}
+
+static struct drm_crtc_state *
+lcdif_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
+{
+ struct lcdif_crtc_state *old = to_lcdif_crtc_state(crtc->state);
+ struct lcdif_crtc_state *new;
+
+ if (WARN_ON(!crtc->state))
+ return NULL;
+
+ new = kzalloc(sizeof(*new), GFP_KERNEL);
+ if (!new)
+ return NULL;
+
+ __drm_atomic_helper_crtc_duplicate_state(crtc, &new->base);
+
+ new->bus_format = old->bus_format;
+ new->bus_flags = old->bus_flags;
+
+ return &new->base;
+}
+
static int lcdif_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct lcdif_drm_private *lcdif = to_lcdif_drm_private(crtc->dev);
@@ -551,12 +615,12 @@ static const struct drm_crtc_helper_funcs lcdif_crtc_helper_funcs = {
};
static const struct drm_crtc_funcs lcdif_crtc_funcs = {
- .reset = drm_atomic_helper_crtc_reset,
+ .reset = lcdif_crtc_reset,
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
- .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+ .atomic_duplicate_state = lcdif_crtc_atomic_duplicate_state,
+ .atomic_destroy_state = lcdif_crtc_atomic_destroy_state,
.enable_vblank = lcdif_crtc_enable_vblank,
.disable_vblank = lcdif_crtc_disable_vblank,
};
--
2.37.1
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