kernel/linux.git/drivers/gpu/drm/imx, branch v5.9.16

treewide: Use fallthrough pseudo-keyword

2020-08-23T22:36:59+00:00

Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva

Merge tag 'imx-drm-next-2020-07-20' of git://git.pengutronix.de/pza/linux into drm-next

2020-07-23T05:21:45+00:00

drm/imx: error path fixes and cleanups - Fix use after free issue in component bind error path by keeping memory allocated as long as the driver is bound. This will be replaced with drm managed memory in the next round. - Fix bus_flags overriding logic in parallel-display. - Disable regulator in imx-tve bind error path. - Drop unnecessary best_encoder callback. - Remove an unused enum in imx-ldb. - Bail out early on missing panel or bridge in parallel-display to speed up -EPROBE_DEFER path. - Disable both LDB channels in split mode. - Restore RGB32, BGR32 format support. - Fix tiled image conversion in case of out of order interrupts. - Remove a superfluous error message in imx-tve. Signed-off-by: Dave Airlie From: Philipp Zabel Link: https://patchwork.freedesktop.org/patch/msgid/ac4452eb3a989bf5d85b65fd30840a21f15ec301.camel@pengutronix.de

drm/imx: imx-tve: Delete an error message in imx_tve_bind()

2020-07-20T13:16:06+00:00

The function “platform_get_irq” can log an error already. Thus omit a redundant message for the exception handling in the calling function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Signed-off-by: Philipp Zabel

drm/imx: imx-ldb: Disable both channels for split mode in enc->disable()

2020-07-20T13:16:05+00:00

Both of the two LVDS channels should be disabled for split mode in the encoder's ->disable() callback, because they are enabled in the encoder's ->enable() callback. Fixes: 6556f7f82b9c ("drm: imx: Move imx-drm driver out of staging") Cc: Philipp Zabel Cc: Sascha Hauer Cc: Pengutronix Kernel Team Cc: NXP Linux Team Cc: Signed-off-by: Liu Ying Signed-off-by: Philipp Zabel

drm/imx: parallel-display: move panel/bridge detection to fail early

2020-07-20T13:16:05+00:00

We do some string parsing and string comparison in front of drm_of_find_panel_or_bridge(). All this work is useless if the call fails. Move drm_of_find_panel_or_bridge() infront of the parsing work to fail early. Signed-off-by: Marco Felsch Reviewed-by: Philipp Zabel Signed-off-by: Philipp Zabel

drm/imx: imx-ldb: remove useless enum

2020-07-20T13:16:05+00:00

Since commit 5e501ed7253b ("drm/imx: imx-ldb: allow to determine bus format from the connected panel") the enum isn't used anymore. Drop it to cleanup the code a bit. Signed-off-by: Marco Felsch Reviewed-by: Philipp Zabel Signed-off-by: Philipp Zabel

drm/imx: drop useless best_encoder callback

2020-07-20T13:16:05+00:00

The best_encoder() callback is used by the drm-core to find an encoder if the connector is connected to multiple encoders but the parallel, tve and ldb uses always the 1-encoder : 1-connector setup. Such a simple setup can be handled by the drm-core. Signed-off-by: Marco Felsch Reviewed-by: Philipp Zabel Signed-off-by: Philipp Zabel

drm/imx: tve: fix regulator_disable error path

2020-07-20T13:16:05+00:00

Add missing regulator_disable() as devm_action to avoid dedicated unbind() callback and fix the missing error handling. Fixes: fcbc51e54d2a ("staging: drm/imx: Add support for Television Encoder (TVEv2)") Signed-off-by: Marco Felsch Signed-off-by: Philipp Zabel

drm/imx: parallel-display: Adjust bus_flags handling

2020-07-20T13:16:05+00:00

The bus_flags handling logic does not seem to cover all potential usecases. Specifically, this seems to fail with an "edt,etm0700g0edh6" display attached to an 24bit display interface, with interface-pix-fmt = "rgb24" set in DT. This patch fixes the problem by overriding the imx_crtc_state->bus_flags from the imxpd->bus_flags only if the DT property "interface-pix-fmt" is present or if the DI provides no formats. Signed-off-by: Marek Vasut Signed-off-by: Philipp Zabel

drm/imx: fix use after free

2020-07-20T13:15:59+00:00

Component driver structures allocated with devm_kmalloc() in bind() are freed automatically after unbind(). Since the contained drm structures are accessed afterwards in drm_mode_config_cleanup(), move the allocation into probe() to extend the driver structure's lifetime to the lifetime of the device. This should eventually be changed to use drm resource managed allocations with lifetime of the drm device. We also need to ensure that all componets are available during the unbind() so we need to call component_unbind_all() before we free non-devres resources like planes. Note this patch fixes the the use after free bug but introduces a possible boot loop issue. The issue is triggered if the HDMI support is enabled and a component driver always return -EPROBE_DEFER, see discussion [1] for more details. [1] https://lkml.org/lkml/2020/3/24/1467 Fixes: 17b5001b5143 ("imx-drm: convert to componentised device support") Signed-off-by: Philipp Zabel [m.felsch@pengutronix: fix imx_tve_probe()] [m.felsch@pengutronix: resort component_unbind_all()) [m.felsch@pengutronix: adapt commit message] Signed-off-by: Marco Felsch Signed-off-by: Philipp Zabel