On Wed, 08 Apr 2020, Arnd Bergmann <arnd@xxxxxxxx> wrote:
> The arm64 gcc-9 release warns about a change in the calling
> conventions:
>
> drivers/video/fbdev/mx3fb.c: In function 'sdc_init_panel':
> drivers/video/fbdev/mx3fb.c:506:12: note: parameter passing for argument of type 'struct ipu_di_signal_cfg' changed in GCC 9.1
> 506 | static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
> | ^~~~~~~~~~~~~~
> drivers/video/fbdev/mx3fb.c: In function '__set_par':
> drivers/video/fbdev/mx3fb.c:848:7: note: parameter passing for argument of type 'struct ipu_di_signal_cfg' changed in GCC 9.1
>
> Change the file to just pass the struct by reference, which is
> unambiguous and avoids the warning.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> drivers/video/fbdev/mx3fb.c | 20 ++++++++++----------
> 1 file changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/video/fbdev/mx3fb.c b/drivers/video/fbdev/mx3fb.c
> index 4af28e4421e5..e13fea3a292f 100644
> --- a/drivers/video/fbdev/mx3fb.c
> +++ b/drivers/video/fbdev/mx3fb.c
> @@ -509,7 +509,7 @@ static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
> uint16_t h_start_width, uint16_t h_sync_width,
> uint16_t h_end_width, uint16_t v_start_width,
> uint16_t v_sync_width, uint16_t v_end_width,
> - struct ipu_di_signal_cfg sig)
> + struct ipu_di_signal_cfg *sig)
I have no idea why get_maintainer.pl (I presume) is Cc'ing me... but
since it is, I'll note that the pointer could be const, while the patch
is
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
either way.
> {
> unsigned long lock_flags;
> uint32_t reg;
> @@ -591,17 +591,17 @@ static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
>
> /* DI settings */
> old_conf = mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF) & 0x78FFFFFF;
> - old_conf |= sig.datamask_en << DI_D3_DATAMSK_SHIFT |
> - sig.clksel_en << DI_D3_CLK_SEL_SHIFT |
> - sig.clkidle_en << DI_D3_CLK_IDLE_SHIFT;
> + old_conf |= sig->datamask_en << DI_D3_DATAMSK_SHIFT |
> + sig->clksel_en << DI_D3_CLK_SEL_SHIFT |
> + sig->clkidle_en << DI_D3_CLK_IDLE_SHIFT;
> mx3fb_write_reg(mx3fb, old_conf, DI_DISP_IF_CONF);
>
> old_conf = mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL) & 0xE0FFFFFF;
> - old_conf |= sig.data_pol << DI_D3_DATA_POL_SHIFT |
> - sig.clk_pol << DI_D3_CLK_POL_SHIFT |
> - sig.enable_pol << DI_D3_DRDY_SHARP_POL_SHIFT |
> - sig.Hsync_pol << DI_D3_HSYNC_POL_SHIFT |
> - sig.Vsync_pol << DI_D3_VSYNC_POL_SHIFT;
> + old_conf |= sig->data_pol << DI_D3_DATA_POL_SHIFT |
> + sig->clk_pol << DI_D3_CLK_POL_SHIFT |
> + sig->enable_pol << DI_D3_DRDY_SHARP_POL_SHIFT |
> + sig->Hsync_pol << DI_D3_HSYNC_POL_SHIFT |
> + sig->Vsync_pol << DI_D3_VSYNC_POL_SHIFT;
> mx3fb_write_reg(mx3fb, old_conf, DI_DISP_SIG_POL);
>
> map = &di_mappings[mx3fb->disp_data_fmt];
> @@ -855,7 +855,7 @@ static int __set_par(struct fb_info *fbi, bool lock)
> fbi->var.upper_margin,
> fbi->var.vsync_len,
> fbi->var.lower_margin +
> - fbi->var.vsync_len, sig_cfg) != 0) {
> + fbi->var.vsync_len, &sig_cfg) != 0) {
> dev_err(fbi->device,
> "mx3fb: Error initializing panel.\n");
> return -EINVAL;
--
Jani Nikula, Intel Open Source Graphics Center
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